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INTEGRATED CIRCUITS
DATA SHEET
TDA8745 Satellite sound receiver with I2C-bus control
Preliminary specification Supersedes data of 1995 Mar 08 File under Integrated Circuits, IC02 1996 Mar 11
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
FEATURES * On-chip frequency synthesizer and mixer: - tuning range 4 to 9.77 MHz - reference oscillator 4 MHz (using a crystal or 4 MHz frequency source) * IF input switches allowing selection of various IF bandwidths (wide or narrow) * Demodulation of two audio signals by wide band Phase-Locked Loops (PLLs) * Audio level control after PLL (modulation depth setting) * Noise Reduction (NR) bypass for use with main audio signals * Left, right and mono output [12(l + r)] on SCART level * External audio inputs (for decoder connection) * Selectable de-emphasis (DEEM) 50 s, 75 s, J17 and flat response * I2C-bus control of all functions * Two selectable addresses * Carrier presence detector with automatic mute option. ORDERING INFORMATION TYPE NUMBER TDA8745 TDA8745H PACKAGE NAME SDIP42 QFP44 DESCRIPTION plastic shrink dual in-line package; 42 leads (600 mil) plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 x 10 x 1.75 mm APPLICATIONS * Satellite receivers * TV sets * Video recorders. GENERAL DESCRIPTION
TDA8745
The TDA8745 is the successor of the TDA8740 and TDA8741. The device contains the functionality of the TDA8740 and TDA8741 together with a synthesizer, mixer and I2C-bus control. The pin numbers mentioned in this publication refer to the SDIP42 package; unless otherwise indicated.
VERSION SOT270-1 SOT307-2
1996 Mar 11
2
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
QUICK REFERENCE DATA SYMBOL VP1 VP2 VP3 IP1 IP2 IP3 S/N(A) Vi(rms) Vi(rms) Vo Ptot Tstg Tamb PARAMETER synthesizer and mixer supply voltage I2C-bus supply voltage general supply voltage synthesizer and mixer supply current I2C-bus supply current general supply current signal-to-noise ratio secondary channel input sensitivity (RMS value) baseband input to mixer baseband input voltage (RMS value) output voltage total power dissipation storage temperature operating ambient temperature A-weighted; NR = on; DEEM = 75 s S/N(A) = 40 dB; NR = on; DEEM = 75 s THD 0.5% -8 - -65 -20 -6 610 - - CONDITIONS MIN. 4.5 4.5 8.0 - - - 68 - TYP. 5.0 5.0 12.0 37 0.6 35 77 0.5
TDA8745
MAX. 5.5 5.5 13.2 48 - 46 - 1.5 200 -4 800 +150 +70
UNIT V V V mA mA mA dB mV mV dBV mW C C
1996 Mar 11
3
12 V 100 H 5V 100 F 22 nF 2.2 F 220 nF C CL L EXT L 25 34 33 Vref HFGND 10 41 42 32 20 37 38 36 35 AFGND 19 V ref PDL PDR PDL OML DC 23 OL PRESENCE DETECTOR 470 k VP3 C DC L 10 F RECT L 1 F C ATT/REC L 4.7 nF C NR D L 10 nF CD L 1 F 10 F VP2 16 DEEM OUT L 22 nF PRES DET L
5V
IN-1
IN-2
IN-3
IN-4
IN-5
10 nF 10.7 (2) NARROW 470 k 330 10.52 (2) NARROW 330 10.7 (2) WIDE 330 PRES DET R 1 F 10 F 10 F 1 F
IN-6
330
330
When driving more than three filters in parallel, pin 5 should be buffered. (1) Add 15 pF for NTSC. (2) Ceramic filters: SFE10.7MJA10-A (narrow) SFE10.52MJA10-A (narrow) SFE10.7MS2-A (wide).
Preliminary specification
TDA8745
Fig.1 Block diagram (SDIP42).
handbook, full pagewidth
DEEM OUT R
1996 Mar 11
HF LIMITER PLL 12 to 3dB AUDIO LPF NOISE REDUCTION DE-EMPHASIS flat 50 s J17 75 s IL2 to IL0 BB LEV3 to LEV0 OML 21
4.7
22 nF
1000 F
BLOCK DIAGRAM
SYNGND
VP1
ADD sel SDA
SCL
I 2 CGND
Philips Semiconductors
6
4
12
18
17
14
I2 C INTERFACE
XTAL 40
10 pF
CRYSTAL OSCILLATOR
4 MHz
4 MHz TUN9 to TUN0 200
CHARGE PUMP
N
TDA8745
NR
DEM1 and DEM0
OS1 and OS0
OM
OMR 12 to 3dB HF LIMITER PLL DC PE IR2 to IR0 PDR IL2 PRESENCE DETECTOR OMR AUDIO LPF NOISE REDUCTION DE-EMPHASIS flat 50 s J17 75 s 22 OR
SLF
2
VCO
6.8 k
33 nF
frequency synthesizer 30 to 40 MHz
1 F
BPFN
2
Satellite sound receiver with I2C-bus control
4
IR2 9 11 13 15 39 CDC R RECT R CATT/REC R 1 27 26 28 C NR D R 4.7 nF 7 8 29 CD R 10 nF
BASEBAND IN
27 pF
27 pF
3
PRE-BPF
47 H
1 k
MIXER
15 pF
(1)
27 pF
5
30
31 C CL L 220 nF
24 EXT R
MBE037
IF OUT
330
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
PINNING PIN SYMBOL SDIP42 CDC R SLF BASEBAND IN VP1 IF OUT SYNGND IN-5 IN-6 IN-1 HFGND IN-2 ADDsel IN-3 I2CGND IN-4 VP2 SCL SDA Vref VP3 OM OR OL EXTR EXTL CATT/REC R RECTR CNR D CD R DEEM OUT R CCL R AFGND CCL L DEEM OUT L CD L CNR D
L R
TDA8745
DESCRIPTION QFP44 39 41 42 43 44 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 DC decoupling capacitor (right channel) synthesizer loop-filter baseband input to mixer synthesizer and mixer supply voltage (+5 V) intercarrier output from mixer synthesizer and mixer ground intercarrier input 5/port expansion output 1 intercarrier input 6/port expansion output 2 Intercarrier input 1 HF ground intercarrier input 2 I2C-bus address selection Intercarrier input 3 I2C-bus ground intercarrier input 4 I2C-bus supply voltage (+5 V) I2C-bus serial clock input I2C-bus serial data input/output decoupling capacitor for reference voltage general supply voltage (+12 V) mono channel output [12(l + r)] right channel output left channel output external audio input (right channel) external audio input (left channel) attack/recovery capacitor (right channel) rectifier DC decoupling (right channel) noise reduction de-emphasis capacitor (right channel) de-emphasis capacitor (right channel) de-emphasis output (right channel) audio pass-through input (right channel) AF ground audio pass-through input (left channel) de-emphasis output (left channel) de-emphasis capacitor (left channel) noise reduction de-emphasis capacitor (left channel) rectifier DC decoupling (left channel) attack/recovery capacitor (left channel) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
RECTL CATT/REC L
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Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
PIN SYMBOL SDIP42 PRES DET R XTAL PRES DET L CDC L n.c. n.c. 39 40 41 42 - - QFP44 35 36 37 38 16 40 presence detector timing (right channel) crystal input for 4 MHz oscillator presence detector timing (left channel) DC decoupling capacitor (left channel) not connected not connected DESCRIPTION
handbook, halfpage
C DC R SLF
1 2 3 4 5 6 7 8 9
42 CDC L 41 PRES DET L 40 XTAL 39 PRES DET R 38 CATT/REC L 37 RECT L 36 C NR D L 35 C D L 34 DEEM OUT L 33 C CL L TDA8745 32 AFGND 31 C CL R 30 DEEM OUT R 29 C D R 28 C NR D R 27 RECT R 26 CATT/REC R 25 EXT L 24 EXT R 23 O L 22 O R
MBE035
BASEBAND IN V P1 IF OUT SYNGND IN-5 IN-6 IN-1
HFGND 10 IN-2 11 ADD sel 12 IN-3 13 I 2 CGND 14 IN-4 15 V P2 16 SCL 17 SDA 18 Vref 19 V P3 20 O M 21
Fig.2 Pin configuration (SDIP42).
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Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
42 BASEBAND IN
handbook, full pagewidth
35 PRES DET R
37 PRES DET L
34 CATT/REC L
44 IF OUT
39 C DC R
38 C DC L
36 XTAL
43 V P1
41 SLF
40 n.c.
SYNGND IN-5 IN-6 IN-1 HFGND IN-2 ADD sel IN-3 I 2 CGND
1 2 3 4 5 6 7 8 9
33 RECT L 32 C NR D L 31 C D L 30 DEEM OUT L 29 C CL L
TDA8745H
28 AFGND 27 C CL R 26 DEEM OUT R 25 C D R 24 C NR D R 23 RECT R
IN-4 10 V P2 11
EXT L 21 C ATT/REC R 22
SCL 12
SDA 13
V ref 14
V P3 15
n.c. 16
O M 17
OR 18
O L 19
EXTR 20
MBE034
Fig.3 Pin configuration (QFP44).
1996 Mar 11
7
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
FUNCTIONAL DESCRIPTION Satellite sound The baseband signal coming from a satellite tuner comprises the demodulated video signal plus a number of sound carriers in the event of reception of a PAL, NTSC or SECAM satellite signal. Nearest to the video signal is the main sound carrier which carries the mono sound related to the video. This is an FM modulated carrier with a fixed pre-emphasis. The carrier frequency can be in the range of 5.8 to 6.8 MHz. Additionally, a number of optional secondary sound carriers may be present. These can be used for stereo or multi-language sound related to the video signal, or for unrelated radio sound. These carriers are also FM modulated, and for better sound quality (improved signal-to-noise performance) broadcast satellites (e.g. `ASTRA') use a noise reduction system (adaptive pre-emphasis circuit, combined with a fixed pre-emphasis). These secondary carrier frequencies can be in the range of 6.30 to 8.28 MHz. For accurate tuning to the many sound carriers, an internal frequency synthesizer and mixer are used to transfer the sound carriers to intermediate frequencies of 10.7 and 10.52 MHz. The TDA8745 contains all circuitry for the processing of the main channel and secondary channels, from baseband signal to line (SCART) output drivers. By means of external band-pass filters the desired frequencies coming from the synthesizer/mixer are routed to the IF limiter/demodulator inputs. Band-pass filter and mixer Before the incoming baseband signal is applied to the mixer, the signal is filtered. Related to the sound carriers, the level of the video part of the baseband signal can be much higher, so to avoid overload it is desirable to attenuate the latter, this is also to avoid interference (additional unwanted mix of signals after mixing). The internal band-pass filter (pass band from approximately 4 to 10 MHz) is completed by a simple external notch filter. The external filter provides substantial attenuation of the video colour carrier. The notch filter is chosen to be external because the required notch frequency is TV standard dependent and also because an accurate on-chip notch filter requires a tuning mechanism (consuming additional chip area). The mixer is a double-balanced mixer with degeneration, this to accommodate the level of the filter output signal. 1996 Mar 11 8
TDA8745
The mixer transfers the different sound carrier frequencies to fixed intermediate frequencies of 10.7 and 10.52 MHz. These frequencies are fed via an internal buffer stage to external ceramic band-pass filters before they are routed to the two demodulator inputs. The buffer stage can drive up to three external ceramic band-pass filters (assuming 330 filter terminations) but this can be increased to four or more by adding an external buffer. Synthesizer The synthesizer consists of the following parts: * Reference oscillator * Reference divider * A 10-bit programmable divider * Phase detector * Charge pump * Voltage Controlled Oscillator (VCO) * Divide-by-two circuit. The reference frequency circuit consists of a 4 MHz crystal oscillator and a divider (by 200). The resulting reference frequency of 20 kHz is fed to the phase detector. The programmable divider consists of a series of cells (divide by 2 or 3) connected as a ripple counter. The minimum division ratio is 2n and the maximum division ratio is 2n + 1 - 1. The programmable divider output signal is also fed to the phase detector. The charge pump provides output current pulses in accordance with the signals from the phase detector. The final tuning voltage for the VCO is provided by the loop filter and a buffer amplifier. The oscillator frequency range is from 29.04 to 40.94 MHz, depending on the setting of the programmable divider (by the TUN signal). The tuning voltage is clipped to limit the VCO frequency range. The frequency of the oscillator is divided-by-two before it is applied to the mixer (to obtain the desired 10 kHz resolution). Left and right channel inputs A maximum of six inputs are available (pins 9, 11, 13, 15, 7 and 8). External ceramic band-pass filters, which are tuned to the desired intermediate frequencies, route the signals to the inputs. For stereo purposes the TDA8745 contains two identical secondary sound processing channels (secondary channel 1 will also be referred to as `left' or `language 1' and secondary channel 2 as `right' or `language 2').
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
With the input selection every input pin of the left and/or right channel can be independently selected. Input selection for the left channel is controlled by the IL signal and for the right channel by the IR signal. From the inputs, the signals are coupled to the limiter/amplifier and to the PLL demodulator of each channel. The output signal from the PLL is routed to both the presence detector and audio level control. The inputs of pins 7 and 8 can be changed into digital outputs for external switching purposes, set by the so called Port Extension bit (PE). Not used inputs should be connected to ground. Note that the inputs of pins 7 and 8 are also floating when not in Port Extension mode. Presence detector The presence detector is used to determine if a carrier is present on the channel of interest. It does so by measuring the amount of high frequency noise (>20 kHz) in the audio signal, which is directly related to the C/N (carrier-to-noise ratio) at the IF input. If a carrier is present, these high frequencies are fairly moderate, if no carrier is present, strong noise components are present. The audio signal, first high-pass filtered and then rectified, is filtered by the components at pins 41 and 39 (PRES DET L and PRES DET R). The DC level at this pin is then compared with an internal reference voltage. If the level at pins 41 and 39 exceeds this voltage level, the presence detector output goes HIGH (no carrier). This output signal can be used to drive the output mute (if bit PDM = 1; see Section "Output selection") and can be monitored by reading bits PDL and PDR. The detection level can be modified by changing the leakage resistor at pins 41 and 39, a higher resistor value gives a `no carrier' response ant C/N levels detected as `carrier present' with a lower resistor value. Audio level control Each demodulator output signal is amplified in a buffer amplifier and DC decoupled by means of electrolytic capacitors connected to pin 42 (left) and pin 1 (right). The output level of all channels is -6 dBV typical at a frequency deviation of the FM signal of 54% of the maximum deviation (i.e 0.54 x 85 kHz = 46 kHz for the main channel and 0.54 x 50 kHz = 27 kHz for the secondary channels) at 1 kHz modulation frequency (reference level).
TDA8745
To adjust for different (main channel) modulation depths used at some satellites the audio level is made adjustable, the signal can be controlled in steps of 1 dB from -12 dB to +3 dB by the LEV signal. Noise Reduction (NR) To improve the quality of the secondary channels, the audio signal is processed at the transmitter side before modulation. For an overall flat audio response the inverse processing must take place after demodulation. This is achieved in the NR. The NR can be regarded as an input level dependent Low-Pass Filter (LPF) [adaptive de-emphasis system] followed by a fixed de-emphasis. Figure 3 shows the transfer characteristics as function of the input level (normalized to input level, and without the fixed de-emphasis). At maximum input level (50 kHz frequency deviation, referred to as 0 dB) the frequency response of the first part (i.e. without fixed de-emphasis) is nearly flat (note the small dip around 3 kHz in Fig.3; this is a system attribute). As the input level is X dB lowered, the higher output frequencies will be reduced an extra X dB with respect to the lower frequencies (1 : 2 expansion). If a main carrier signal is received, the NR can be bypassed at which the signal is fed directly to the de-emphasis circuit. The noise reduction is active when the NR signal (via I2C-bus) is logic 1. De-emphasis De-emphasis is realized by means of several internal resistors and an external capacitor to ground. Via the I2C-bus, the DEM signal can be switched between 50 s, 75 s, J17 and no de-emphasis. Figure 4 shows these four different possibilities. Output selection With the output selector the output pins 23 and 22 can be switched to the left and right satellite channels (pins 33 and 31) or to the external inputs (pins 25 and 24) for an other signal source or for connection of a decoder box. the OS1 and OS0 bits determine this selection. Pin 21 is a separate output which delivers the mono channel. The mono signal is the sum of pin 23 (left) and pin 22 (right) output signal [12(l + r)].
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Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
Output pins 23 and 22 can be muted by setting the OML and OMR signals to logic 1. In addition, automatic muting is also possible, the presence detector (as described in Section "Presence detector") sets the PDL bit (PDR for other channel). Absence of a carrier at the selected frequency results in automatic muting. This mechanism is enabled or inhibited by the PDM bit (Presence Detector auto Mute). All outputs (pins 21, 22 and 23) are line drivers with SCART level capability and are short-circuit protected by means of 125 output resistors. Pins 34 and 30 are also line drivers at SCART level and can be used as signal outputs before the IC's output selection (i.e. for decoder box use). ABBREVIATIONS BPF = Band-Pass Filter. fmod = modulating frequency. fM = frequency deviation of the main Channel. fS1 = frequency deviation of secondary Channel 1 (left). fS2 = frequency deviation of secondary Channel 2 (right). fOM = carrier frequency of main Channel.
TDA8745
fOS1 = carrier frequency of secondary Channel 1. fOS2 = carrier frequency of secondary Channel 2. IF = Intermediate Frequency. IL = Input Left. IR = Input Right. LPF = Low-Pass Filter. NR = Noise Reduction. OML = Output Mute Left. OMR = Output Mute Right. OS = Output Select. PDM = Presence Detector auto Mute. PE = Port Extension. PLL = Phase-Locked Loop. POR = Power-On Reset. S/N = Signal-to-Noise ratio. VCO = Voltage Controlled Oscillator.
handbook, halfpage
0
MBE284
transfer (dB)
0 dB
handbook, halfpage
8
MBE285
transfer (dB)
4
4 flat
8
0
12
4 50 s
8 16 20 dB 20 16 24 10 102 10 3 10 4 10 5 10 102 12
J17
75 s 10 3 10 4 f (Hz) 10 5
f (Hz)
Fig.4
Noise reduction transfer as function of input level.
Fig.5 LF de-emphasis curves.
1996 Mar 11
10
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
I2C-BUS PROTOCOL Table 1 Slave receiver/transmitter address: D4 or D6 (HEX) BIT 6 1 BIT 5 0 BIT 4 1 BIT 3 0 BIT 2 1 BIT 1 AS(1)
TDA8745
BIT 7 1 Notes
BIT 0 R/W(2)
1. AS bit defined by level at address select (pin 12); 0 V = logic 0; 5 V = logic 1. 2. R/W = 0; TDA8745 is receiver (microcontroller is master transmitter). R/W = 1; TDA8745 is transmitter (microcontroller is master receiver). TDA8745 receiver use In the receiver mode the device has four subaddresses with auto-increment, as shown in Tables 2 to 5. Table 2 IL2 i7 0 Table 3 Input byte SA: 00; situation after POR IL1 i6 0 IL0 i5 0 IR2 i4 0 IR1 i3 0 IR0 i2 1 TUN9 i1 1 TUN8 i0 0
Tuning byte SA: 01; situation after POR TUN6 t6 1 TUN5 t5 1 TUN4 t4 0 TUN3 t3 1 TUN2 t2 1 TUN1 t1 0 TUN0 t0 0
TUN7 t7 1 Table 4
Select byte SA: 02; situation after POR BB s6 0 OS1 s5 0 OS0 s4 0 PDM s3 0 PE s2 0 OML s1 1 OMR s0 1
TEST s7 0 Table 5
Audio byte SA: 03; situation after POR LEV2 a6 1 LEV1 a5 0 LEV0 a4 0 NR a3 1 DEM1 a2 1 DEM0 a1 1 BPFN a0 0
LEV3 a7 1
TDA8745 transmitter use No subaddress. Table 6 PDL r7 0 or 1 Read byte PDR r6 0 or 1 - r5 1 - r4 1 - r3 1 - r2 1 - r1 1 POR r0 0 or 1
1996 Mar 11
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Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
Slave receiver mode (bits transmitted from microcontroller to TDA8745)
TDA8745
Different IF inputs can be selected for the PLLs, for switching between different external BPFs and/or channels; see Tables 7 and 8. Table 7 IL2 i7 0 0 0 0 1 1 1 1 X X X X 0 1 Notes 1. X = don't care. 2. Bit PE (s2) can be set to logic 1 to change IF input 5 into digital output for external switching purposes. IL2 to IL0; Input Left; note 1 IL1 i6 0 0 1 1 0 0 1 1 0 0 1 1 X X IL0 i5 0 1 0 1 0 1 0 1 0 1 0 1 X X PE(2) s2 0 0 0 0 0 0 0 0 1 1 1 1 1 1 MODE IF input IN-1 selected for left PLL (after POR) IF input IN-2 selected for left PLL IF input IN-3 selected for left PLL IF input IN-4 selected for left PLL IF input IN-5 selected for left PLL IF input IN-6 selected for left PLL no selection no selection IF input IN-1 selected for left PLL IF input IN-2 selected for left PLL IF input IN-3 selected for left PLL IF input IN-4 selected for left PLL IF input IN-5 used as output; 0 = 0 V IF input IN-5 used as output; 1 = 5 V
1996 Mar 11
12
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
Table 8 IR2 i4 0 0 0 0 1 1 1 1 X X X X 0 1 Notes 1. X = don't care. IR2 to IR0; input right; note 1 IR1 i3 0 0 1 1 0 0 1 1 0 0 1 1 X X IR0 i2 0 1 0 1 0 1 0 1 0 1 0 1 X X PE(2) s2 0 0 0 0 0 0 0 0 1 1 1 1 1 1 MODE IF input IN-1 selected for right PLL
TDA8745
IF input IN-2 selected for right PLL (after POR) IF input IN-3 selected for right PLL. IF input IN-4 selected for right PLL IF input IN-5 selected for right PLL IF input IN-6 selected for right PLL no selection no selection IF input IN-1 selected for right PLL IF input IN-2 selected for right PLL IF input IN-3 selected for right PLL IF input IN-4 selected for right PLL IF input IN-6 used as output; 0 = 0 V IF input IN-6 used as output; 1 = 5 V
2. Bit PE (s2) can be set to logic 1 to change IF input 6 into digital output for external switching purposes.
1996 Mar 11
13
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
Table 9 TUN9 i1 0 0 0 1 1 1 1 1 1 1 1 1 Note 1. This is the situation after POR. The frequency range of synthesizer is shown in Table 10. Table 10 Frequency range of synthesizer PARAMETER Synthesizer frequency range Mixer input frequency range Tuning range Notes 1. Tuning the synthesizer below 29.04 MHz may be possible, but is not guaranteed. RANGE (MHz) 29.04 to 40.94 (in 20 kHz grid); note 1 14.52 to 20.47 (in 10 kHz grid); note 2 3.82 to 9.77 (in 10 kHz grid; 10.7 MHz IF); note 3 TUN9 to TUN0; tuning TUN8 i0 1 1 1 0 0 0 0 1 1 1 1 1 TUN7 t7 1 1 1 0 1 1 1 0 0 1 1 1 TUN6 t6 0 0 0 1 0 0 1 0 0 1 1 1 TUN5 t5 1 1 1 0 0 1 1 0 1 1 1 1 TUN4 t4 0 0 0 1 0 1 0 1 1 1 1 1 TUN3 t3 1 1 1 0 0 1 1 0 0 1 1 1 TUN2 t2 1 1 1 1 1 0 1 0 1 1 1 1 TUN1 t1 0 0 1 0 1 0 0 0 0 0 1 1 TUN0 t0 0 1 0 0 0 0 0 0 0 1 0 1 10.7 IF (MHz) 3.82 3.83 3.84
TDA8745
10.52 IF (MHz) 4.00 4.01 4.02 4.03 to 5.67 5.68 5.69 to 6.17 6.18 6.19 to 6.67 6.68 6.69 to 7.19 7.20(1) 7.21 to 7.55 7.56 7.57 to 7.91 7.92 7.93 to 9.92 9.93 9.94 9.95
0110101111 to 1001010011 1001010101 to 1010000101 1010000111 to 1010110111 1010111001 to 1011101011 1011101101 to 1100001111 1100010001 to 1100110011 1100110101 to 1111111100
3.85 to 5.49 5.50 5.51 to 5.99 6.00 6.01 to 6.49 6.50 6.51 to 7.01 7.02(1) 7.03 to 7.37 7.38 7.39 to 7.73 7.74 7.75 to 9.74 9.75 9.76 9.77
2. The mixing frequency (fmix) can be calculated with equation: fmix = (1024 + 512[TUN9] + 256[TUN8] + 128[TUN7] + 64[TUN6] + 32[TUN5] + 16[TUN4] + 8[TUN3] + 4[TUN2] + 2[TUN1] + [TUN0]) x 10 kHz. 3. Tuning frequency = mixer input frequency - 10.7 MHz.
1996 Mar 11
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Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
Table 11 Bit TEST TEST s7 0 1 MODE - (POR) test DESCRIPTION
TDA8745
in applications this bit should always be logic 0, to avoid conflicts with other settings setting TEST enables some special modes used for factory testing
Table 12 Bit BB; baseband; note 1 BB s6 0 1 Note 1. The PLL demodulators can also be used for demodulating FM carriers (e.g. terrestrial TV sound) at baseband frequencies, by changing the lock range of the PLLs. Table 13 Bits OS1 and OS0; output select; note 1 OS1 s5 0 0 1 1 Note 1. The signal at both line outputs OL and OR (pins 23 and 22) can be selected with bits OS1 and OS0. Table 14 Bit PDM; Presence Detector auto Mute; note 1 PDM s3 0 1 Note 1. In both situations the status of the presence detector can be monitored by reading the bits PDL (r7) and PDR (r6) back from the IC. Appropriate action (e.g. muting, channel selection or tuning) can then be taken by the microcontroller. Note that this function also mutes the signal from the external inputs (pins 25 and 24). This may be desirable when using these inputs for connecting a satellite descrambler box. If not, reset PDM (s3) to logic 0 when selecting external [e.g. together with bits OS1 (s5) and OS0 (s4)]. MODE - (POR) PDM - if this bit is set to logic 1, a channel for which no incoming carrier is found will be muted DESCRIPTION OS0 s4 0 1 0 1 left right external MODE stereo (POR) DESCRIPTION Left channel audio (pin 33) at OL; right channel audio (pin 31) at OR Left channel audio (pin 33) at both OL and OR Right channel audio (pin 31) at both OL and OR External left at (pin 25) at OL; external right (pin 24) at OR MODE synthesizer baseband DESCRIPTION synthesizer use (PLLs central frequency approximately 10.7 MHz) (after POR) baseband use (PLLs central frequency approximately 6 MHz)
1996 Mar 11
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Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
Table 15 Bit PE; Port Extension; note 1 PE s2 0 1 Note 6 IF inputs; no digital output (after POR) 4 IF inputs; 2 digital outputs DESCRIPTION
TDA8745
1. Two IF inputs (IN-5 and IN-6; pins 7 and 8) can be used as digital output instead. If no more than four IF inputs are needed, two external functions can be controlled via the I2C-bus this way. The level at these pins is controlled by bits IL2 (i7) and IR2 (i4); see Tables 7 and 8. Table 16 Bits OML and OMR; Output Mute Left and Output Mute Right; note 1 BIT OML (s1) OMR (s0) LEVEL 0 1 0 1 Note 1. Left and right audio can be muted independently. Note that also the external input signals (pins 25 and 24) can be muted this way. - mute - mute MODE - Left audio channel is muted - Right audio channel is muted DESCRIPTION
1996 Mar 11
16
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
Table 17 Bits LEV3 to LEV0; level adjust; note 1 LEV3 a7 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Notes LEV2 a6 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 LEV1 a5 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 LEV0 a4 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 MODE -12 dB -11 dB -10 dB -9 dB -8 dB -7 dB -6 dB -5 dB -4 dB -3 dB -2 dB -1 dB 0 dB +1 dB +2 dB +3 dB SECONDARY CHANNELS(2) (kHz) 199 177 158 141 126 112 100 89 79 71 63 56 50(3) 45 40 35
TDA8745
MAIN CHANNEL(2) (kHz) 338 302 269 240 214 190 170 151 135 120 107 95 85(3) 76 68 60
1. The audio level can be adjusted in steps of 1 dB, to adjust for different FM deviations used in main channel audio carriers and/or spread in PLL output amplitude. With secondary carriers the Noise Reduction (NR) is to be used with the 0 dB setting (note that the NR audio frequency response is level dependent, therefore another setting than 0 dB is only to be used when making a fine-adjustment (+2 dB/-2 dB) for PLL spread. Typical setting for main channel carriers is in most cases 85 kHz (0 dB) or 76 kHz (+1 dB). 2. Maximum deviation. 3. Situation after POR. Table 18 Bit NR; Noise Reduction; note 1 NR a3 0 1 Note 1. For reception of main channel carriers the NR circuit can be bypassed. MODE DESCRIPTION
NR bypassed Noise Reduction bypassed (main channel) NR active Noise Reduction active (secondary channels) (after POR)
1996 Mar 11
17
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
Table 19 Bits DEM1 and DEM0; De-emphasis; note 1; see Fig.5 DEM1 a2 0 0 1 1 Notes 1. Different de-emphasis characteristics can be selected, to adjust for different main channel audio carriers. 2. In most cases the de-emphasis needed for main channel carriers is 50 s. 3. The NR is to be used with the 75 s setting for standard secondary channels. Table 20 Bit BPFN; Band-Pass Filter Not; note 1 BPFN a0 0 1 Note 1. To avoid interference by the video signal, the incoming baseband signal is filtered. If this filtering is not required the filter can be switched off. Table 23 Bit POR; Power-On Reset; note 1 POR r0 0 1 Note normal operation POR generated; power dip detected since last read of POR bit DESCRIPTION DESCRIPTION mixer input signal filtered by BPF (after POR) mixer input signal is not filtered Note DEM0 a1 0 1 0 1 J17 50 s(2) 75 s [por](3) Note DE-EMPHASIS no de-emphasis (flat)
TDA8745
Slave transmitter mode (bits transmitted from TDA8745 to microcontroller) Table 21 Bit PDL; Presence Detector Left; note 1 PDL r7 0 1 DESCRIPTION carrier detected at left channel no carrier detected at left channel
1. Bit PDL (r7) transmits the current status of the left channel presence detector. When PDL = 1, no carrier is found at the currently selected frequency. If bit PDM (s3) = 0 the left channel audio is muted. Table 22 Bit PDR; Presence Detector Right; note 1 PDR r6 0 1 DESCRIPTION carrier detected at right channel no carrier detected at right channel
1. Bit PDR (r6) transmits the current status of the right channel presence detector. When PDR = 1, no carrier is found at the currently selected frequency. If bit PDM (s3) = 0 the right channel audio is muted.
1. At switching on, or after a power dip on the I2C-bus supply voltage (VP2), an internal signal is generated which resets the I2C-bus registers to a pre-defined state. If bit POR (r0) = 1, such a situation has occurred since the last time the read byte was read. After reading, the bit is reset to logic 0. Table 24 Bits r5 to r1 - r5 1 - r4 1 - r3 1 - r2 1 - r1 1 DESCRIPTION These bits have no function. Although their state is fixed, the microcontroller should not rely on this because of eventual future use.
1996 Mar 11
18
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP1 VP2 VP3 Vn PARAMETER synthesizer and mixer supply voltage I2C-bus supply voltage general supply voltage voltage on pins 2, 3, 5 and 40 voltage on pins 7 and 8 voltage on pins 1 and 42 Vi Tstg Tamb Notes 1. All voltages referenced to ground at pins 6, 10, 14 and 32. 2. Port Extension enabled (PE = 1; see Table 15). 3. IN-5 and IN-6 (pins 7 and 8) not being in the Port Extension mode. THERMAL CHARACTERISTICS SYMBOL Rth j-a SDIP42 QFP44 PARAMETER thermal resistance from junction to ambient in free air 50 60 VALUE storage temperature operating ambient temperature CONDITIONS note 1 note 1 note 1 note 1 note 2 note 1 0 0 0 0 0 0 0 -65 -20 MIN.
TDA8745
MAX. 5.5 5.5 13.2 5.5 VP2 7.7 1 +150 +70 V V V V V V V C C
UNIT
input voltage on pins 7, 8, 9, 11, 13 and 15 notes 1 and 3
UNIT K/W K/W
1996 Mar 11
19
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
DC CHARACTERISTICS All voltages referenced to ground (pins 6, 10, 14 and 32). In accordance with the block diagram (see Fig.1); VP1 = VP2 = 5 V; VP3 = 12 V; Tamb = 25 C; fOS1 = 10.7 MHz; fOS2 = 10.52 MHz (no modulation; see note 1); unless otherwise specified. SYMBOL Supply VP1 VP2 VP3 IP1 IP2 IP3 Ptot Pins V21,22,23 V24,25,31,33 V31,33 V30,34 V27,37 V19 V9,11,13,15 V42,1 V41,39 V5 V3 V2 V40 VOH VOL Notes 1. Presence of both carriers is required to achieve lock of the PLLs; otherwise not all pins will have a stable DC voltage. 2. Pin 7 and 8 functioning as normal inputs (bit PE = 0). voltage on pins 21, 22 and 23 voltage on pins 24, 25, 31 and 33 voltage on pins 31 and 33 voltage on pins 30 and 34 voltage on pins 27 and 37 voltage on pin 19 voltage on pins 9, 11, 13 and 15 voltage on pins 42 and 1 voltage on pins 41 and 39 voltage on pin 5 voltage on pin 3 voltage on pin 2 voltage on pin 40 note 2 - - - - - 3.7 - - - - - - - 3.8 3.8 3.8 3.8 3.8 3.8 0 3.4 2.6 1.8 2.4 2.6 1.3 - - - - - - - 3.9 - - - - - - - V V V V V V V V V V V V V synthesizer and mixer supply voltage I2C-bus supply voltage general supply voltage synthesizer and mixer supply current I2C-bus supply current general supply current total power dissipation 4.5 4.5 8.0 - - - - 5.0 5.0 12 37 0.6 35 610 5.5 5.5 13.2 48 - 46 800 V V V mA mA mA mW PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Port extensions (pins 7 and 8; bit PE = 1) HIGH level output voltage LOW level output voltage IOH = 0.5 mA IOL = -0.5 mA 4.5 0 5 0.5 V V
1996 Mar 11
20
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
AC CHARACTERISTICS All voltages referenced to ground (pins 6, 10, 14 and 32); in accordance with the block diagram (see Fig.1); VP1 = VP2 = 5 V; VP3 = 12 V; Tamb = 25 C; fmod = 1 kHz; fM = 46 kHz; fS1 = fS2 = 27 kHz (reference levels); fOM = 10.7 MHz; fOS1 = 10.7 MHz; fOS2 = 10.52 MHz; IF level at pins 9, 11, 13, 15, 7 and 8 = 20 mV (RMS value) and SFE 10.7MJA (narrow), SFE 10.52MJA (narrow) and SFE 10.7MS3 (wide) ceramic filters; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Band-pass filter, mixer and buffer Ri Vi(rms) V3 Hl/Hh Hlm/Hh Hmh/Hh Hh*A Hh*C Io(p) Ro t SVCO fVCO fxtal Rxtal Cxtal Ii(p) input resistance baseband input voltage (RMS value) 1 dB compression point (RMS value) filter transfer at 200 kHz with respect to 7.3 MHz filter transfer at 2 MHz with respect to 7.3 MHz filter transfer at 5.3 MHz with respect to 7.3 MHz filter transfer at 7.3 MHz and mixer amplification filter transfer at 7.3 MHz and mixer conversion gain mixer output current (peak) mixer output resistance f = 10.7 MHz; note 4 note 3 note 1 V3 - V5 = 1 dB; note 2 10 - - - - -2 15 10 5 - - note 5 Vloopf = 2.6 V - - - - - note 6 50 12.5 - 180 - -28 +2 17 12 7 12 15 200 - -60 -20 +4 19 14 - 30 - - - - 60 10 - k mV mV dB dB dB dB dB mA s MHz/V MHz
Charge pump, buffer amplifier and VCO repetition time of charge pump pulses VCO sensitivity VCO frequency 50 -9 35.4
Crystal oscillator (4 MHz) crystal oscillator frequency resonance resistance of crystal parallel capacitance of crystal input current from external 4 MHz source (peak) 4 - 4.5 - MHz pF A
IF inputs (pins 9, 11, 13, 15, 7 and 8) and limiters VIN-1 to IN-6(rms) input sensitivity (RMS value) S/N(A) = 40 dB; fS = 27 kHz; NR = on; de-emphasis = 75 s S/N(A) = 40 dB; fM = 46 kHz; NR = off; de-emphasis = 50 s Vi1 to Vi6 input signal THD 0.5% - 0.3 1 mV
-
0.8
2
mV
-
-
200
mV
1996 Mar 11
21
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL PLL FM demodulators fCCO
PARAMETER
CONDITIONS
MIN. - - - - 10 5.50 - - -
TYP.
MAX. - - - - 11.5 8.50 - - 1.5
UNIT
free-running frequency
PLL left; BB = 0 PLL right; BB = 0 PLL left; BB = 1 PLL right; BB = 1
10.6 10.6 6.9 6.9 - - -5.6 -7.3 -
MHz MHz MHz MHz MHz MHz dBV dBV dB
fCCO VOL; VOR
lock range of PLLs PLL output voltage (pins 23 and 22)
BB = 0; note 7 BB = 1; note 7 NR = off; DEEM = flat; BB = 0 NR = off; DEEM = flat; BB = 1; note 8
VOL; VOR
spread of PLL output voltage over lock range (pins 23 and 22)
NR = off; DEEM = flat; BB = 1; note 8
Noise reduction V 37,27 (50 kHz) -------------------------------V 37,27 (1 kHz) Vo 23,22 low-pass filter 50 kHz response with respect to 1 kHz output voltage (pins 23 and 22) note 9 -21 -1 -16 -11 dB
at 0 dB NR input level; fS1 = fS2 = 50 kHz; DEEM = flat; note 10 at -20 dB NR input level; fS1 = fS2 = 5 kHz; DEEM = flat
+1
+3
dBV
-29
-26
-23
dBV
V 23,22 (15 kHz) --------------------------------V 23,22 (1 kHz)
15 kHz frequency response with respect to 1 kHz
at 0 dB NR input level; fS1 = fS2 = 50 kHz; DEEM = flat at -20 dB NR input level; fS1 = fS2 = 5 kHz; DEEM = flat
-2
0
+2
dB
-13
-11.5
-10
dB
Voffset(DC) De-emphasis V 23,22 (15 kHz) --------------------------------V 23,22 (1 kHz)
DC offset voltage on attack/recovery capacitors (pins 38 and 26)
f = 0 kHz; all PLLs locked 14
-
22
mV
15 kHz frequency response with respect to 1 kHz flat
NR = off; DEEM = flat NR = off; DEEM = J17; note 11 NR = off; DEEM = 50 s NR = off; DEEM = 75 s
-0.5 -13.9 -15.2 -18.6 100
0.0 -12.4 -13.7 -17.1 125
+0.5 -10.9 -12.2 -15.6 150
dB dB dB dB
Ro
output resistance (pins 34 and 30)
1996 Mar 11
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Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL Overall performance Vi 3(rms)
PARAMETER
CONDITIONS
MIN. -
TYP.
MAX.
UNIT
baseband input sensitivity main sound carrier (RMS value)
S/N(A) = 40 dB; fS = 27 kHz; NR = on; DEEM = 75 s S/N(A) = 40 dB; fM = 46 kHz; NR = off; DEEM = 50 s
0.5
1.5
mV
-
1.5
3
mV
Vo 23,22
output voltage
secondary channels; fS = 27 kHz; NR = on; DEEM = 75 s main channel; fS = 46 kHz; NR = off; DEEM = 50 s
-8
-6
-4
dBV
-8
-6
-4
dBV
UBS
unbalance output voltage
secondary channels; NR = on; DEEM = 75 s main channel; NR = off; DEEM = 50 s
-1 -1 -
- - 0.1
+1 +1 0.5
dBV dBV %
THD
total harmonic distortion
secondary channels; NR = on; DEEM = 75 s; note 12 main channel; NR = off; DEEM = 50 s; note 12
- 69
0.1 77
0.5 -
% dB
S/N(A)
signal-to-noise ratio
A-weighted; secondary channels (synthesizer included); NR = on; DEEM = 75 s; note 12 A-weighted; secondary channels (synthesizer excluded); NR = on; DEEM = 75 s; note 12 A-weighted; main channel (synthesizer included); NR = off; DEEM = 50 s; note 12 A-weighted; main channel (synthesizer excluded); NR = off; DEEM = 50 s; note 12
72
80
-
dB
54
62
-
dB
62
70
-
dB
MUTEatt ct S/S SVRRP3
mute attenuation crosstalk attenuation between secondary channels supply voltage ripple rejection
output select left and right muted
74 -
90 74 14.3 15.6
- - - -
dB dB dB dB
VRR = 100 mV; fi = 70 Hz; NR = on; DEEM = 75 s VRR = 100 mV; fi = 1 kHz; NR = on; DEEM = 75 s
- -
1996 Mar 11
23
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL SVRRP1-P2
PARAMETER supply voltage ripple rejection
CONDITIONS VRR = 100 mV; fi = 70 Hz; NR = on; DEEM = 75 s VRR = 100 mV; fi = 1 kHz; NR = on; DEEM = 75 s
MIN. - -
TYP. 25 4
MAX. - -
UNIT dB dB
Output select Vi 25,24 Ri 25,24,33,31 Vo 23,22 Ro 23,22,21 THD S/N(A) input voltage (pins 25 and 24) input resistance at pins 25, 24, 33 and 31 output voltage at pins 23 and 22 output resistance at pins 23, 22 and 21 total harmonic distortion signal-to-noise ratio V24,25 = -6 dBV; OS = external; f = 1 kHz A-weighted; V24,25 = -6 dBV; OS = external f = 1 kHz V24,25 = -6 dBV; OS = external - 100 -6.5 100 - 80 - 150 -6 125 0.01 - 8 200 -5.5 150 0.3 - dBV k dBV % dB
ct L/R; ct R/L I2C-bus Ci Isink VIH VIL IIH IIL Address D4H Address D6H fSCL Notes
crosstalk between channels
- - 3 3 0 - -
80
- - - 5 1.5 10 10 1 5 100
dB
input capacitance SDA sink current HIGH level input voltage LOW level input voltage HIGH level input current LOW level input current address D4H address D6H SCL frequency ADDsel = LOW ADDsel = HIGH
4 - - - - - - - -
pF mA V V A A V V kHz
0 3 -
1. Maximum of 0.5% THD at LF outputs. 2. When the increase of the output signal (pin 5 at 10.7 MHz) lags 1 dB behind the increase of the input signal (pin 3; 7.02 MHz carrier), the so called 1 dB compression point is reached. For complex signals (more than one sound carrier), this point will shift to a higher value. 3. The mixer performs both a mixing and amplifying action (normal operation). The synthesizer is tuned to the 7.3 MHz incoming carrier. 4. The buffer output is sensitive to capacitive loading, therefore (capacitive) loads other than those present in the block diagram (see Fig.1) should be avoided. 5. As present at the mixer output (pin 5) in `BPFTILT' test mode the actual VCO sensitivity is two times the given value because of the divide-by-two circuit between VCO output and mixer. 6. The required 4 MHz crystal can be omitted if this frequency is already available in the application. This signal source should be connected to pin 40, via a capacitor in series with a resistor Rext. The minimum required AC current is 50 A, determined by the resistors Rint and Rext and the level of the 4 MHz AC voltage. The value of Rint is 700 and the signal shape of the signal is not important. 1996 Mar 11 24
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
7. Maximum THD of 0.5%; 8 V < VP3 < 13.2 V; 0 C < Tamb < 70 C. Measured at pins 34 and 30; NR = off; DEEM = flat. 8. Correction of output voltage is possible by correcting the volume level. 9. Measured at pins 37 and 27 with no electrolytic capacitors connected to these pins. 10. Input level of 0 dB; signal level in accordance with fS1 = fS2 = 50 kHz. At this input level, the NR response is equal for high and low frequencies (see Fig.4). 11. J17 de-emphasis includes +6 dB amplification (see Fig.5). 12. Both PLLs locked. INTERNAL CIRCUITRY For description see Chapter "Pinning". SYMBOL CDC R PIN 1 EQUIVALENT CIRCUIT
20 1 20
1640
MLD094
SLF
2
2 k 1 k
275 2
2 k
2 k
MLD095
1996 Mar 11
25
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL BASEBAND IN
PIN 3
EQUIVALENT CIRCUIT
3 12.5 k
2.5 V
MLD096
VP1
4
4
V P1
MLD060
IF OUT
5
5
MLD061
SYNGND
6
6
SYNGND
MLD062
IN-5
7
275 7
MLD063
1996 Mar 11
26
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL IN-6
PIN 8
EQUIVALENT CIRCUIT
275 8
MLD097
IN-1
9
275 9
MLD064
HFGND
10
10
HFGND
MLD065
IN-2
11
275 11
MLD066
ADDsel
12
275 12
MLD067
1996 Mar 11
27
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL IN-3
PIN 13
EQUIVALENT CIRCUIT
275 13
MLD114
I2CGND
14
14
I2 CGND
MLD068
IN-4
15
275 15
MLD098
VP2
16
16
VP2
MLD069
SCL
17
17
275
MLD070
SDA
18
18
275
MLD071
1996 Mar 11
28
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL Vref
PIN 19
EQUIVALENT CIRCUIT
25
40 k 125
275 19 15.2 k
MLD072
VP3
20
20 VP3
MLD073
OM
21
125 21
MLD074
3.8 V
OR
22
125 22
MLD075
3.8 V
1996 Mar 11
29
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL OL
PIN 23
EQUIVALENT CIRCUIT
125 23
MLD076
3.8 V
EXTR
24
transfer gate I O
20 103 k 24 I O
transfer gate
47 k 3.8 V 3.8 V
MLD077
EXTL
25
transfer gate I O
20 103 k 25 I O
transfer gate
47 k 3.8 V 3.8 V
MLD078
CATT/REC R
26
100
100 26
3.8 V
MLD079
1996 Mar 11
30
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL RECTR
PIN 27
EQUIVALENT CIRCUIT
4.7 k 27
MLD080
CNR D
R
28
AC signal current 7.5 k 275 28
MLD081
CD R DEEM OUT R
29 30
transfer gate I O 125 30 29 I O
transfer gate
3.8 V
MLD082
CCL R
31
transfer gate I 20 103 k 31 I O O
transfer gate 47 k 3.8 V 3.8 V
MLD083
1996 Mar 11
31
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL AFGND
PIN 32
EQUIVALENT CIRCUIT
substrate 32 AFGND
MLD084
CCL L
33
transfer gate I 20 103 k 33 I O O
transfer gate 47 k 3.8 V 3.8 V
MLD085
DEEM OUT L CD L
34 35
transfer gate I O 125 34 35 I O
transfer gate
3.8 V
MLD086
CNR D
L
36
AC signal current 7.5 k 275 36
MLD224
1996 Mar 11
32
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL RECTL
PIN 37
EQUIVALENT CIRCUIT
4.7 k 37
MLD088
CATT/REC L
38
100
100 38
3.8 V
MLD089
PRES DET R
39
100 39 100
MLD090
XTAL
40
40
MLD091
1996 Mar 11
33
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
SYMBOL PRES DET L
PIN 41
EQUIVALENT CIRCUIT
100 41 100
MLD092
CDC L
42
20 42 20
1640
MLD093
1996 Mar 11
34
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
PACKAGE OUTLINES SDIP42: plastic shrink dual in-line package; 42 leads (600 mil)
TDA8745
SOT270-1
seating plane
D
ME
A2
A
L
A1 c Z e b1 wM (e 1) MH b 42 22
pin 1 index E
1
21
0
5 scale
10 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A max. 5.08 A1 min. 0.51 A2 max. 4.0 b 1.3 0.8 b1 0.53 0.40 c 0.32 0.23 D (1) 38.9 38.4 E (1) 14.0 13.7 e 1.778 e1 15.24 L 3.2 2.9 ME 15.80 15.24 MH 17.15 15.90 w 0.18 Z (1) max. 1.73
Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT270-1 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION
ISSUE DATE 90-02-13 95-02-04
1996 Mar 11
35
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
TDA8745
QFP44: plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 x 10 x 1.75 mm
SOT307-2
c
y X
A 33 34 23 22 ZE
e E HE wM bp pin 1 index 44 1 bp D HD wM 11 ZD B vM B vMA 12 detail X A A2 (A 3) Lp L
A1
e
0
2.5 scale
5 mm
DIMENSIONS (mm are the original dimensions) UNIT mm Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT307-2 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION A max. 2.10 A1 0.25 0.05 A2 1.85 1.65 A3 0.25 bp 0.40 0.20 c 0.25 0.14 D (1) 10.1 9.9 E (1) 10.1 9.9 e 0.8 HD 12.9 12.3 HE 12.9 12.3 L 1.3 Lp 0.95 0.55 v 0.15 w 0.15 y 0.1 Z D (1) Z E (1) 1.2 0.8 1.2 0.8 10 0o
o
ISSUE DATE 95-02-04 97-08-01
1996 Mar 11
36
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our "IC Package Databook" (order code 9398 652 90011). SDIP SOLDERING BY DIPPING OR BY WAVE The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact with the joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. REPAIRING SOLDERED JOINTS Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 C, contact may be up to 5 seconds. QFP REFLOW SOLDERING Reflow soldering techniques are suitable for all QFP packages. The choice of heating method may be influenced by larger plastic QFP packages (44 leads, or more). If infrared or vapour phase heating is used and the large packages are not absolutely dry (less than 0.1% moisture content by weight), vaporization of the small amount of moisture in them can cause cracking of the plastic body. For more information, refer to the Drypack chapter in our "Quality Reference Handbook" (order code 9397 750 00192). 1996 Mar 11 37
TDA8745
Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary from 50 to 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheat for 45 minutes at 45 C. WAVE SOLDERING Wave soldering is not recommended for QFP packages. This is because of the likelihood of solder bridging due to closely-spaced leads and the possibility of incomplete solder penetration in multi-lead devices. If wave soldering cannot be avoided, the following conditions must be observed: * A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. * The footprint must be at an angle of 45 to the board direction and must incorporate solder thieves downstream and at the side corners. Even with these conditions, do not consider wave soldering the following packages: QFP52 (SOT379-1), QFP100 (SOT317-1), QFP100 (SOT317-2), QFP100 (SOT382-1) or QFP160 (SOT322-1). During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Maximum permissible solder temperature is 260 C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 C within 6 seconds. Typical dwell time is 4 seconds at 250 C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. REPAIRING SOLDERED JOINTS Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 C.
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
TDA8745
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. PURCHASE OF PHILIPS I2C COMPONENTS
Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specification defined by Philips. This specification can be ordered using the code 9398 393 40011.
1996 Mar 11
38
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I2C-bus control
NOTES
TDA8745
1996 Mar 11
39
Philips Semiconductors - a worldwide company
Argentina: IEROD, Av. Juramento 1992 - 14.b, (1428) BUENOS AIRES, Tel. (541)786 7633, Fax. (541)786 9367 Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. (02)805 4455, Fax. (02)805 4466 Austria: Triester Str. 64, A-1101 WIEN, P.O. Box 213, Tel. (01)60 101-1236, Fax. (01)60 101-1211 Belgium: Postbus 90050, 5600 PB EINDHOVEN, The Netherlands, Tel. (31)40-2783749, Fax. (31)40-2788399 Brazil: Rua do Rocio 220 - 5th floor, Suite 51, CEP: 04552-903-SAO PAULO-SP, Brazil, P.O. Box 7383 (01064-970), Tel. (011)821-2333, Fax. (011)829-1849 Canada: PHILIPS SEMICONDUCTORS/COMPONENTS: Tel. (800) 234-7381, Fax. (708) 296-8556 Chile: Av. Santa Maria 0760, SANTIAGO, Tel. (02)773 816, Fax. (02)777 6730 China/Hong Kong: 501 Hong Kong Industrial Technology Centre, 72 Tat Chee Avenue, Kowloon Tong, HONG KONG, Tel. (852)2319 7888, Fax. (852)2319 7700 Colombia: IPRELENSO LTDA, Carrera 21 No. 56-17, 77621 BOGOTA, Tel. (571)249 7624/(571)217 4609, Fax. (571)217 4549 Denmark: Prags Boulevard 80, PB 1919, DK-2300 COPENHAGEN S, Tel. (45)32 88 26 36, Fax. (45)31 57 19 49 Finland: Sinikalliontie 3, FIN-02630 ESPOO, Tel. (358)0-615 800, Fax. (358)0-61580 920 France: 4 Rue du Port-aux-Vins, BP317, 92156 SURESNES Cedex, Tel. (01)4099 6161, Fax. (01)4099 6427 Germany: P.O. Box 10 51 40, 20035 HAMBURG, Tel. (040)23 53 60, Fax. (040)23 53 63 00 Greece: No. 15, 25th March Street, GR 17778 TAVROS, Tel. (01)4894 339/4894 911, Fax. (01)4814 240 India: Philips INDIA Ltd, Shivsagar Estate, A Block, Dr. Annie Besant Rd. Worli, Bombay 400 018 Tel. (022)4938 541, Fax. (022)4938 722 Indonesia: Philips House, Jalan H.R. Rasuna Said Kav. 3-4, P.O. Box 4252, JAKARTA 12950, Tel. (021)5201 122, Fax. (021)5205 189 Ireland: Newstead, Clonskeagh, DUBLIN 14, Tel. (01)7640 000, Fax. (01)7640 200 Italy: PHILIPS SEMICONDUCTORS S.r.l., Piazza IV Novembre 3, 20124 MILANO, Tel. (0039)2 6752 2531, Fax. (0039)2 6752 2557 Japan: Philips Bldg 13-37, Kohnan 2 -chome, Minato-ku, TOKYO 108, Tel. (03)3740 5130, Fax. (03)3740 5077 Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL, Tel. (02)709-1412, Fax. (02)709-1415 Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR, Tel. (03)750 5214, Fax. (03)757 4880 Mexico: 5900 Gateway East, Suite 200, EL PASO, TX 79905, Tel. 9-5(800)234-7381, Fax. (708)296-8556 Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB, Tel. (040)2783749, Fax. (040)2788399 New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND, Tel. (09)849-4160, Fax. (09)849-7811 Norway: Box 1, Manglerud 0612, OSLO, Tel. (022)74 8000, Fax. (022)74 8341 Pakistan: Philips Electrical Industries of Pakistan Ltd., Exchange Bldg. ST-2/A, Block 9, KDA Scheme 5, Clifton, KARACHI 75600, Tel. (021)587 4641-49, Fax. (021)577035/5874546 Philippines: PHILIPS SEMICONDUCTORS PHILIPPINES Inc., 106 Valero St. Salcedo Village, P.O. Box 2108 MCC, MAKATI, Metro MANILA, Tel. (63) 2 816 6380, Fax. (63) 2 817 3474 Portugal: PHILIPS PORTUGUESA, S.A., Rua dr. Antonio Loureiro Borges 5, Arquiparque - Miraflores, Apartado 300, 2795 LINDA-A-VELHA, Tel. (01)4163160/4163333, Fax. (01)4163174/4163366 Singapore: Lorong 1, Toa Payoh, SINGAPORE 1231, Tel. (65)350 2000, Fax. (65)251 6500 South Africa: S.A. PHILIPS Pty Ltd., 195-215 Main Road Martindale, 2092 JOHANNESBURG, P.O. Box 7430, Johannesburg 2000, Tel. (011)470-5911, Fax. (011)470-5494 Spain: Balmes 22, 08007 BARCELONA, Tel. (03)301 6312, Fax. (03)301 42 43 Sweden: Kottbygatan 7, Akalla. S-164 85 STOCKHOLM, Tel. (0)8-632 2000, Fax. (0)8-632 2745 Switzerland: Allmendstrasse 140, CH-8027 ZURICH, Tel. (01)488 2211, Fax. (01)481 77 30 Taiwan: PHILIPS TAIWAN Ltd., 23-30F, 66, Chung Hsiao West Road, Sec. 1. Taipeh, Taiwan ROC, P.O. Box 22978, TAIPEI 100, Tel. (886) 2 382 4443, Fax. (886) 2 382 4444 Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd., 209/2 Sanpavuth-Bangna Road Prakanong, Bangkok 10260, THAILAND, Tel. (66) 2 745-4090, Fax. (66) 2 398-0793 Turkey: Talatpasa Cad. No. 5, 80640 GULTEPE/ISTANBUL, Tel. (0 212)279 27 70, Fax. (0212)282 67 07 Ukraine: Philips UKRAINE, 2A Akademika Koroleva str., Office 165, 252148 KIEV, Tel. 380-44-4760297, Fax. 380-44-4766991 United Kingdom: Philips Semiconductors LTD., 276 Bath Road, Hayes, MIDDLESEX UB3 5BX, Tel. (0181)730-5000, Fax. (0181)754-8421 United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409, Tel. (800)234-7381, Fax. (708)296-8556 Uruguay: Coronel Mora 433, MONTEVIDEO, Tel. (02)70-4044, Fax. (02)92 0601
Internet: http://www.semiconductors.philips.com/ps/ For all other countries apply to: Philips Semiconductors, International Marketing and Sales, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Telex 35000 phtcnl, Fax. +31-40-2724825 SCDS47 (c) Philips Electronics N.V. 1996
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
537021/1100/02/pp40 Document order number: Date of release: 1996 Mar 11 9397 750 00723

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