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T4258
AM/FM Receiver IC
Description
The T4258 is an integrated AM/FM frontend circuit in BICMOS technology. It contains a double conversion system for FM and an up-/down conversion circuit for AM (IF1 = 10.7 MHz, IF2 = 450 kHz). A complete automatically aligned high performance AM/FM tuner can be built together with the PLL U4256BM. This ICs are designed for high performance car radio applications. Electrostatic sensitive device. Observe precautions for handling.
Features
D Receiving condition analyzer D Integrated band filter for 2nd IF; with software controlled bandwidth D Pin compatible with U4255BM D FM-double conversion system D World tuner, US Weatherband, J-band D Completely integrated FM demodulator D Soft mute and multipath noise cancellation D AM up-/down conversion system D AM stereo capability D Stop signal generation for AM and FM D Automatic alignment possible D 3-wire bus controlled
Block Diagram
IF1FMI MX1OA MX1OB 43 44 38 V3 IF1AMI MX2OB IF1REF IF1OUT MX2IN MX2OA 39 33 30 AM FM 41 MX1AMA 7 AMAGC AGC AMVREG 6 AMPLPF 8 AGC MX1FMA MX1FMB GNDMX OSCOUT 16 Divider 1 2 4 Divider 2...10 Offset Adj. Chan. Stop FM Dem. Soft Mute FM MX1AMB 3 AM V3 Noise- blanker AGC IFAGCL IFAGCH IF2OUT 29 26 23 24 IF2IN V3P 28 27 AM Dem.
32
OPLPF
36 35 20
Automatic FILADJ Adjustment 37
15 14 13 OSC
V3 Bandgap 12 25 42 5
OSCE OSCB
17 18
V57 VS EN DATA METER GND FMAGC CLK
Ordering Information
Extended Type Number T4258-ILQ T4258-ILS Package SSO44 SSO44 Taped and reeled Tube Remarks
Rev. A1, 10-Jan-01
II
Bus
GNDOSC
INT 19 9 22 10 21 INT 34 SMUTE
MX2LO ADJAC
Figure 1. Block diagram
II II
Multi- path 40 MULTIP
11
MPX
Dev. Ana. 31 DEV
1 (17)
T4258
Pin Description
Pin 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 39 40 41 42 43 44 Symbol MX1FMA MX1FMB MX1AMB GNDMX FMAGC AMVREG AMAGC AMPLPF METER ADJAC MPX V57 OSCB OSCE GNDOSC OSCOUT EN CLK DATA IF2OUT INT MX2LO MX2OB MX2OA GND MX2IN V3P IF2IN V3 IF1OUT DEV OPLPF IF1AMI SMUTE IFAGCH IFAGCL FILADJ IF1FMI IF1REF MULTIP MX1AMA VS MX1OA MX1OB Function 1st mixer FM input A 1st mixer FM input B 1st mixer AM input B Ground 1st mixer FM preamplifier AGC AM control voltage AM preamplifier AGC AM AGC LP filter Fieldstrength output Adjacent channel detection output Multiplex signal 5.7 V reference voltage Oscillator basis Oscillator emitter Oscillator ground Oscillator output 3-wire bus enable 3-wire bus clock 3-wire bus data 2nd IF amplifier output Interrupt, stop signal, test out 10.25 MHz input for 2nd mixer 2nd mixer output B 2nd mixer output A Ground 2nd mixer input 3 V ref. for AMPIN, AMIFAGC, Control, IF2IN 2nd IF amplifier input 3 V reference for IF1OUT, MX2IN 1st IF amplifier output Deviation detect output Operating point LPF 1st IF AM amplifier input Soft MUTE control input IF AGC LP filter high time constant constant IF AGC LP filter low time constant Filter adjust 1st IF FM amplifier input 1st IF & MX1OUT ref., MX1AMA, MX1AMB Multipath detection output 1st mixer AM input A Supply voltage 1st mixer output A 1st mixer output B
MX1FMA MX1FMB MX1AMB GNDMX FMAGC AMVREG AMAGC AMPLPF METER ADJAC MPX V57 OSCB OSCE GNDOSC OSCOUT EN CLK DATA IF2OUT INT MX2LO
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23
MX1OB MX1OA VS MX1AMA MULTIP IF1REF IF1FMI FILADJ IFAGCL IFAGCH SMUTE IF1AMI OPLPF DEV IF1OUT V3 IF2IN V3P MX2IN GND MX2OA MX2OB
Figure 2. Pinning SSO44
2 (17)
Rev. A1, 10-Jan-01
T4258
Absolute Maximum Ratings
All voltages are referred to GND (Pin 25) Parameter Supply voltage Power dissipation Junction temperature Ambient temperature range Storage temperature range Pin 42 Symbol VS Ptot Tj Tamb Tstg Value 10 1,0 150 -40 to +85 -50 to +150 Unit V W C C C
Operating Range
All voltages are referred to GND (Pin 25) Parameter Supply voltage range Ambient temperature Pin 42 Symbol VS Tamb Min. 8 -40 Typ. 8.5 Max. 10 85 Unit V C
Thermal Resistance
Parameter Junction ambient soldered to PCB Symbol RthJA Value t.b.d. Unit K/W
Electrical Characteristics
Test conditions (unless otherwise specified): VS = +8.5 V, Tamb = +25C for AC parameters: fiRF = 1 MHz, Rg = 50 W, fMOD = 0.4 kHz, m = 0.3, fIF = 450 kHz, reference point Pin 4 Parameter Supply voltage Supply current AM RF AGC AGC threshold Mixer Input (2 bit) 91 94 97 100 N Pin 43 + 44 Sm1 Pins 43, 44 VoIF IP3 10 MHz Pin 41 2 17 4.1 8 133 13 10 mA mA/V Vpp dBV kW dbV dbV dbV dbV Test Conditions / Pins Pin 42 Pin 42 Symbol VS IS Min. Typ. 8.5 Max. 10 100 Unit V mA
AM LO divider Programmable divider AM Mixer (10.7 MHz) DC supply current Conversion conductance ioif/virf Maximum IF output Input intercept point 3rd order Input resistance (3 bit)
Rev. A1, 10-Jan-01
3 (17)
T4258
Electrical Characteristics (continued)
Test conditions (unless otherwise specified): VS = +8.5 V, Tamb = +25C for AC parameters: fiRF = 1 MHz, Rg = 50 W, fMOD = 0.4 kHz, m = 0.3, fIF = 450 kHz, reference point Pin 4 Parameter Input resistance IF preamplifier gain Preamplifier control range Output intercept point 3rd order Noise figure Mixer 2 (450 kHz) DC supply current Conversion conductance ioif2/viif1 Maximum IF output Output impedance Input intercept point 3rd order Input resistance 2nd IF Amplifier (450 kHz) Input resistance IF preamplifier gain Preamplifier control range IF2 Output (Pin 20) Output level Oscillator Oscillator amplitude Rg (Pin 13) = 220 W, Q of Losc = 70 VLOB VLOE VLObuf fOSC Pin 16 Pin 16 Range FM Europe FM Japan AM WB RLObuf Nosc 1 2 3 2 1.5 70 3 160 100 90 mV mV mV MHz dBc W 200 mV Pin 28 Pin 28 to 20 Ri G 3 53 47 kW dB dB Pins 23, 24 Pin 23 - GND Pin 24 - GND Pin 23 + 24 Sm2 VoIF Ro Co IP3 Ri 10 2 8 1 3 133 330 mA mA/V Vpp MW pF dBV W IP3 F RL = 330 W Test Conditions / Pins Pin 33 Pins 33 to 30 Symbol Ri G Min. Typ. 100 15 26 137 10 Max. Unit kW dB dB dBV dB AM-1st IF Amplifier (10.7 MHz)
Frequency range Harmonics Output resistance Programmable oscillator divider
70 70
220 260 -15
4 (17)
Rev. A1, 10-Jan-01
T4258
Electrical Characteristics
Test conditions (unless otherwise specified): VS = +8.5 V, Tamb = +25C, for AC parameters: fiRF = 100 MHz, Rg = 50 W, fMOD = 0.4 kHz, Df = 75 kHz, fIF = 450 kHz, reference point Pin 4 Parameter FM AGC AGC threshold mixer input (2 bit) Vmixin 85 90 95 103 t.b.d. t.b.d. 7 125 10 dBV dBV dBV dBV dBV dBV mA/V dBV dB k 5 9 pF k pF k 7 5 pF pF Test Conditions / Pins Symbol Min. Typ. Max. Unit
AGC threshold mixer output AGC threshold IF amp. out FM Mixer Conversion transconductance 3rd order intercept point Noise figure Input resistance Input capacitance Input 1 resistance to ground Input 1 capacitance to ground Input 2 resistance to ground Input 2 capacitance to ground Output capacitance to GND 1st IF FM Amplifier Digitally adjustable gain Input resistance Output resistance Temperature coefficient of the gain Temperature coefficient of the gain Noise figure Output intercept point 3rd order Bit 66 = 0 Bit 66 = 1 3 bit, 10.7 MHz Pin 38 Pin 30 f = 100 MHz f = 100 MHz f = 100 MHz f = 100 MHz Pin 1 to 2 Pin 1 to 2 Pin 1 Pin 1 Pin 2 Pin 2 Pins 43, 44 Load impedance: RL43, 44 = 200
Vmixout Vif1out gc IP3 NFdsb Ri 1, 2 Ci 1, 2 Ri1 Ci1 Ri2 Ci2 Co 43, Co 44 Gmin Gmax Ri 38 Ro 30 TK1 TK2 F IP3
20 30 330 330
dB dB dB/K dB/K
t.b.d. 130
dB dBV
Rev. A1, 10-Jan-01
5 (17)
T4258
Electrical Characteristics (continued)
Test conditions (unless otherwise specified): VS = +8.5 V, Tamb = +25C, for AC parameters: fiRF = 100 MHz, Rg = 50 W, fMOD = 0.4 kHz, Df = 75 kHz, fIF = 450 kHz, reference point Pin 4 Parameter FM Demodulator (Pin 11) Output voltage ViPin 23, 24 = 40 mV f = 450 kHz Deviation = 22.5kHz, fMOD = 1 kHz Bandwidth = 30 Hz .. 20 kHz Deemphasis 50 s Bandwidth 2nd IF filter = 120 kHz Bit 71 = 0, Bit 72 = 1 ViPin 23, 24 = 40 mV f = 450 kHz Deviation = 2.5 kHz, fMOD = 1 kHz Bandwidth 2nd IF filter = 30 kHz (Bit 80 = 0) 85 5 50 FM (4 bit) WB (4 bit) 50 20 -43 Bit 79 = 0 Bit 79 = 1 0.5 90 180 80 200 100 +43 dB V mV/dB kHz kHz kHz kHz kHz kHz VMPX,
Pin 11
Test Conditions / Pins
Symbol VMPX,
Pin 11
Min.
Typ. 150
Max.
Unit mV
Signal-to-noise related to 22.5 kHz dev. Total distortion WB Demodulator (Pin 11) Output voltage
S/N
60 0.3
dB %
165
mV
Total distortion Fieldstrength Output (Pin 10) Range Max. output voltage Steepness Integrated IF filter Bandwidth Centerfrequency adjust MPX Lowpass Bandwidth Stopsignal Generator Stop Window
3.5
%
6 (17)
Rev. A1, 10-Jan-01
T4258
Electrical Characteristics (continued)
Parameter Input voltage High LOW Clock frequency Period of CLK High Low Rise time EN, DA, CLK Fall time EN, DA, CLK Set-up time Hold time EN Hold time DA tH tL tR tF tS tHEN tHDA 100 250 0 250 250 400 100 Test Conditions / Pins Symbol Min. Typ. Max. Unit 3-wire bus, ENABLE, Clock, DATA Pins 17, 18, 19 VBUS VBUS 2.0 1.0 1.0 V V MHz ns ns ns ns ns ns ns
Bus Timing
tR Enable tS tR Data tHDA tS tR Clock tF tHEN tF
tF
tH
tL
96 11826
Figure 3. Bus timing
Rev. A1, 10-Jan-01
7 (17)
T4258
Data Transfer
A24_100 MSB ADDR. BYTE3 Demodulator Gain FM - IF1 LSB MSB Pin21 INT 1= stop B91 B90 B89 B88 B87 B86 B85 B84 B83 B82 B81 BYTE2 Search stop window/ Noiseblanker AM sensitivity LSB Local OSC AM divider/ Multipath sensitivity MSB Pin9 Meter 1= nband B80 BYTE1 Pin11 MPX LPF 0= 90kHz B79 B78 B77 B76 B75 B74 B73 Stop signal gate time LSB
10
0 1= AM B93
1= FM B92
A24_101 MSB ADDR. BYTE3 WB demodulator gain Soft mute threshold LSB MSB Soft mute depth
BYTE 2
TK FM IF1 ampl. AGC threshold AM/FM 1st IF ampl. AM/FM 1st Mixer +AGC AM/FM 1=AM B62 B61 Pin23/ Pin24 MX2O bandwidth
LSB
MSB
BYTE1 Pin 20 IFOUT Pin28 IF2IN Demodulator control
LSB Gain local OSC
Int. IF2 reference shift
10
1 B72 B71 B70 B69 B68
1= 26dB B67 B66 B65 B64
1=AM B63
0= IF2out B60 B59 B58 B57 B56 B55
0= open B54
0= active B53
0= low B52
A24_111 MSB ADDR.
BYTE 3
Local OSC AGC Do not change 0 B29 0 B28 0 B27
LSB
MSB
BYTE 2
Pin 9 offset
LSB
MSB
BYTE 1
Pin 9 Meter 1= +multi
LSB Local OSC AGC prescaler (VCO(Buffer)
Bandpath filter center frequency
11
10 B30
0 B26
0 B25
0 B24
0 B23
0 B22 B21 B20 B19 B18 B17 B16 B15 B14
B13
B12
B11
B10
A8_100 MSB ADDR. Test- mode 0 B9 BYTE 1 Multipath noise cancellation 0=on B8 Pin 11 MPX OUT 1=Mute B7 Pin 40/10 Reset 0 B6 LSB Noise blanker AM 1=on B5
1
0
0
A8_101 MSB ADDR. 1 0 1 Pin 21 INT 1= ON B4 B3 B2 B1 B0 BYTE 1 Bandpath filter Band width LSB
8 (17)
Rev. A1, 10-Jan-01
T4258
Pulse Diagram
8-bit command
EN DATA CLK
LSB BYTE 1 MSB
16-bit command
EN DATA CLK
LSB BYTE 1 MSB LSB BYTE 2 MSB
24-bit command
EN DATA CLK
LSB BYTE 1 MSB LSB BYTE 2 MSB LSB BYTE 3 MSB
Figure 4. Pulse diagram
Bus Control
The operating mode is set by the bits 92 and 93 AM/ FM/ Weather Channel Standby FM AM Weather band Bit 93 0 0 1 1 Bit 92 0 1 0 1 Bits 85 to 87 select the the search-stop deviation from the center frequency ans AM noiseblanker sensitivity AM Noiseblanker Sensitivity Low Searchstop window + 0.5 kHz 1.1 kHz 2.3 kHz Normal 4.8 kHz 10 kHz 20 kHz 40 kHz High 80 kHz Bit 87 Bit 86 Bit 85 Bit 88 switches the search mode on/off Station search Receive Search Bit 88 0 1
The bits 89 to 91 control the gain of the FM IF amplifier Gain FM-IF 19 dB 21 dB 23 dB 25 dB 27 dB 28 dB 29 dB 30 dB Bit 91 Bit 90 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 Bit 89 0 1 0 1 0 1 0 1
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1
Rev. A1, 10-Jan-01
9 (17)
T4258
In AM mode (Bits 92, 93), Bits 81 to 84 set the divide factor of the AM divider Divider AM Mixer 1 Divide by 10 Divide by 9 Divide by 8 Divide by 7 Divide by 6 Divide by 5 Divide by 4 Divide by 3 Divide by 2 Bit 93 1 1 1 1 1 1 1 1 1 Bit 92 0 0 0 0 0 0 0 0 0 Bit 84 1 0 0 0 0 0 0 0 0 Bit 83 X 1 1 1 1 0 0 0 0 Bit 82 X 1 1 0 0 1 1 0 0 Bit 81 X 1 0 1 0 1 0 1 0 Bit 79 controls the band width of the low pass filter of the MPX output Band Width MPX Low Pass Filter 90 kHz In FM mode and in weather band mode (Bit 92, 93), the Bits 81 to 84 set the multipath sensitivity Sensitivity Multipath Off Low Bit 93 x x x x x x x Normal x x x x x x x x High x Bit 92 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit 84 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit 83 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit 82 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit 81 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 The demodulator gain for the weather band mode is set by the bits 71 and 72 Demodulator Gain in Weather Band Mode 5x 7.5 x 10 x 15 x Bit 72 0 0 1 1 Bit 71 0 1 0 1 Time Window for Stop Signal 3.1969 ms 1 x 3.1969 ms ... 63 x 3.1969 ms 1 1 1 1 1 1 Bit 78 0 0 Bit 77 0 0 Bit 76 0 0 Bit 75 0 0 Bit 74 0 0 Bit 73 0 1 180 kHz Bit 79 0 1 Bit 80 and Bit 13 switches between narrow band field strength information and wide band field strength information Field strength narrow band / wide band FM field strength (wide band) Wide Band + Multipath fieldstrength AM field strength from AGC (narrow band) Narrow band + Multipath fieldstrength Bit 80 0 0 1 1 Bit 13 1 0 1 0
The stop counter calculates an average center frequency during the time which is set by the bits 73 to 78
10 (17)
Rev. A1, 10-Jan-01
T4258
For soft mute, the MPX signal level will be reduced depending on the input signal strength. Bits 68 to 70 set the input signal field strength, at which the MPX signal will be reduced by 3 dB (for soft mute). The setting of fieldstrength offsett (Bit 18 ... 21) has also influence of the soft start. Start Soft Mute 0 dB 1 dB 2 dB 3 dB 4 dB 5 dB 6 dB 7 dB Bit 70 0 0 0 0 1 1 1 1 Bit 69 0 0 1 1 0 0 1 1 Bit 68 0 1 0 1 0 1 0 1 Bits 60 and 61 controls the band width of the 2nd-mixer output tank, in FM mode FM Band Width Mixer 2 150 kHz 200 kHz 250 kHz 450 kHz Bit 61 0 0 1 1 Bit 60 0 1 0 1
Bit 62 select which 1st mixer and AGC stage in active Bit 62 FM mixer + FM AGC active AM mixer + AM AGC active 0 1
Bit 67 sets the maximum reduction of the MPX signal level Max. Value of Soft Mute 30 dB 26 dB Bit 67 0 1
Bit 63 controls which 1st IF amplifier is active Bit 63 1st FM - IF amplifier active 1st AM - IF amplifier active 0 1
Temperature coefficient setting of FM IF-amplifier Temperature Coefficient (TC) of the IF Amplifier TK 1 TK 2 Bit 66 0 1
Setting of the internal second IF reference shift IF Offset + 0.00 kHz + 6.25 kHz + 12.50 kHz + 18.75 kHz + 25.00 kHz + 31.25 kHz + 37.50 kHz + 43.75 kHz - 0.00 kHz - 6.25 kHz - 12.50 kHz - 18.75 kHz Bit 59 Bit 58 Bit 57 Bit 56 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Level control of the FM / WB - AGC threshold FM AGC Threshold 103 dBV 97 dBV 92 dBV 85 dBV Bit 65 0 0 1 1 Bit 64 0 1 0 1 Bit 62 0 0 0 0
Level control of AM-AGC threshold AM Control Start 91dBV 94 dBV 97 dBV 100 dBV Bit 65 0 0 1 1 Bit 64 0 1 0 1 Bit 62 1 1 1 1
- 25.00 kHz - 31.25 kHz - 37.50 kHz - 43.75 kHz
Rev. A1, 10-Jan-01
11 (17)
T4258
Function of Pin 20 setting is done by Bit 55 Pin 20: IF out / Field Strength for Multipath 2nd IF output Multipath field strength Band filter, in FM mode 2nd IF Filter Internal filter External + internal filter Bit 54 0 1 Bit 55 0 1 Setting of the fieldstrenght offset (Output Pin 9) Offset Fieldstrenght 0.0 dB 0.5 dB 1.0 dB 1.5 dB 2.0 dB 2.5 dB 3.0 dB 3.5 dB 4.0 dB Setting Bit 53 controls the demodulator in FM/ WB mode. Demodulator Control FM fine tuning OFF (default) WB fine tuning Bit 53 1 0 4.5 dB 5.0 dB 5.5 dB 6.0 dB 6.5 dB Setting Bit 52 controls the gain of the local oscillator. Local Oscillator Low gain High gain Bit 30 controls the oscillator AGC Oscillator AGC AGC of (default) AGC on Bit 30 0 1 Bit 52 0 1 7.0 dB 7.5 dB Bit 21 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit 20 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit 19 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit 18 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Setting Bit 17 controls the center frequency OFFSET of the integrated bandpath filter's center frequency. Offset Center Frequency Offset + Offset - Bit 17 0 1
Setting the OFFSET of the integrated bandpath filter center frequency. Offset Center Frequency 0.00 kHz 6.25 kHz 12.50 kHz 18.75 kHz 25.00 kHz 31.25 kHz 37.50 kHz 43.75 kHz Bit 17 Bit 16 Bit 15 Bit 14 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1
12 (17)
Rev. A1, 10-Jan-01
T4258
Setting the local oscillator prescaler (VCO/ Buffer) Prescaler Prescaler VCO Buffer 1 1.5 1.5 2 3 1 3 1.5 2 3 Bit 12 X 0 1 X X Bit 11 0 0 0 1 1 Bit 10 0 1 1 0 1 Bit 5 switches the AM noiseblanker ON/OFF AM Noiseblanker OFF ON Setting Bit 9 (expert mode) activates test mode (B18 - B23 active) Mode Normal mode Test mode Bit 9 0 1 Bit 5 0 1 Bit 6 = 1 resets the Multipath sensor and the adjacent channel sensor Sensor out (Pin 10, 40) Normal To ground Bit 6 0 1
Bits 0 to 3 set the band width of the integrated 2nd IF band filter IF Bandwidth 200 kHz 190 kHz 180 kHz Bit 3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit 2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Bit 8 = 0 activates the multipath noise canceller Multipath Noise Canceller Active Not active Bit 8 0 1
170 kHz 160 kHz 150 kHz 140 kHz 130 kHz 120 kHz 110 kHz
Bit 7 = 1 mutes the MPX output Mute of MPX Output MPX out, Pin 11 Mute MPX Bit 7 0 1
100 kHz 90 kHz 80 kHz 70 kHz 60 kHz 50 kHz
Rev. A1, 10-Jan-01
13 (17)
testpoint 50 50 V 50 50
T4258
Test Circuit
I II I II I I I III I IIII IIII IIIIIIII IIII III I II II I I I II II I I II II I II I II I I II I II II I II I II II II I II I I II II I I II I II I II
FM 41 AM AGC 3 V3 7 AGC 6 8 Noise- blanker AGC 1 FM 2 4 16 Divider 2...10 Offset Adj. Chan. Stop FM Dem. Soft Mute Divider 15 V3 14 Bandgap
Bus
14 (17)
VS
43 38 30 28 27 AM Dem. AM 39 33 29 26 23 24 44
VS
VS
50
32
Pin 29
36 35 20 Automatic Adjustment 37
Figure 5. Test circuit
OSC INT 9 22 10 21 13 12 25 42 5 17 18 19
470
V
V
Multi- path 40
50
11
V
Dev. Ana. 34 31
Bus VS Pin 29 V3
Rev. A1, 10-Jan-01
R407 VS (+8,5V...10,5V R29 10 DEV F201 KR201 R305 1k5 C in F201 C302 C206 10n C310 1n 30 29 28 27 26 25 24 23 220n C312 10n R152 10 C309 F302 10n 1u C111 44 R41 1k2 43 42 41 40 39 38 33 470n C204 470n 37 36 C205 10u 35 34 R111 200k C202 C207 220n 32 31 C208 220n C113 100n 100p R32 1k KF302 X301 R303 1k C209 10n C306 12p C112 10u C201 100n R34 27 KR202 R106 10 R304 5k6 R33 2k C308 100n MULTIP 10
Rev. A1, 10-Jan-01
L302
C319 6p8 R311
100uH
2k2
Application Board Schematic
L303 2m2
R105 100
R115 1k
T102 BC858
T4258
1 2 C203 22u 47p 22p F131 C156 BB804 R121 68k D131 R131 5k6 20 19 C134 18 17 16 15 14 10n C155 100n C108 C109 1n 6p8 C107 C110 4n7 470p C11 10n C77 EN GND C133 6p8 C114 220n C131C132 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 INT IF2OUT DATA CLK
T302 BC848 R313 390 R102 68k F102 D102 18p BB804 R104 470 R112 47k 10p C104 10n C106 L102 2u2 F101 BB804 R122 68k C158 10n C159 10n T101 BFR93A C56 27p
C316 R308 T301
220n
2k2
BC 858C
R306 470k
Figure 6. Application board schematic
U4256BM
1n 1 R151 8k2 C152 330p 2 3 C151 10n DAC3 4 5 6 7 C102 3p9 S391D 10n D101 D103 C103 C157 10n C115 100n C116 100n
T301 J109
C153 C154 12p 12p 10,25MHz Q151 13 12 11
R307 47
C315 C302
220n 10n
8
9
10
C117 10n
L301
D301
SWO1 SWO3 SWO2 SWO4
4u7
Ant
M 75 Ohm
S391D C311 D302 S391D 100n
R103 1k
MPX ADJAC METER
T4258
15 (17)
T4258
Package Dimensions
Package SSO44
Dimensions in mm
18.05 17.80 9.15 8.65 7.50 7.30
2.35 0.3 0.8 16.8 44 23 0.25 0.10
0.25 10.50 10.20
technical drawings according to DIN specifications
1
22
16 (17)
Rev. A1, 10-Jan-01
T4258
Ozone Depleting Substances Policy Statement
It is the policy of Atmel Germany GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. Atmel Germany GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. Atmel Germany GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use Atmel Wireless & Microcontrollers products for any unintended or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. Data sheets can also be retrieved from the Internet: http://www.atmel-wm.com
Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423
Rev. A1, 10-Jan-01
17 (17)

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