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INTEGRATED CIRCUITS
SA639 Low voltage mixer FM IF system with filter amplifier and data switch
Product specification IC17 Data Handbook 1998 Feb 10
Philips Semiconductors
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
DESCRIPTION
The SA639 is a low-voltage high performance monolithic FM IF system with high-speed RSSI incorporating a mixer/oscillator, two wideband limiting intermediate frequency amplifiers, quadrature detector, logarithmic received signal strength indicator (RSSI), fast RSSI op amps, voltage regulator, wideband data output, post detection filter amplifier and data switch. The SA639 is available in 24-lead TSSOP (Thin shrink small outline package). The SA639 was designed for high bandwidth portable communication applications and will function down to 2.7V. The RF section is similar to the famous NE605. The data output provides a minimum bandwidth of 1MHz to demodulate wideband data. The RSSI output is amplified and has access to the feedback pin. This enables the designer to level adjust the outputs or add filtering. The post-detection amplifier may be used to realize a low pass filter function. A programmable data switch routes a portion of the data signal to an external integration circuit that generates a data comparator reference voltage. SA639 incorporates a power down mode which powers down the device when Pin 8 is high. Power down logic levels are CMOS and TTL compatible with high input impedance.
PIN CONFIGURATION
RFIN RF BYPASS XTAL OSC (EMITTER) XTAL OSC (BASE) VCC RSSI FEEDBACK RSSI OUT POWER DOWN CONTROL DATA OUT POSTAMP IN POSTAMP OUT SWITCH CONTROL
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
MIXER OUT IF AMP DECOUPLING IF AMP IN IF AMP DECOUPLING IF AMP OUT GND LIMITER IN LIMITER DECOUPLING LIMITER DECOUPLING LIMITER OUT QUADRATURE IN SWITCH OUT
SR00030
Figure 1. Pin Configuration
APPLICATIONS
* DECT (Digital European Cordless Telephone) * FSK and ASK data receivers
FEATURES
* XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz local
oscillator can be injected)
* VCC = 2.7 to 5.5V * Low power consumption: 8.6mA typ at 3V * Wideband data output (1MHz min.) * Fast RSSI rise and fall times * Mixer input to >500MHz * Mixer conversion power gain of 9.2dB and noise figure of 11dB at
110MHz
* 92dB of IF Amp/Limiter power gain * 25MHz limiter small signal bandwidth * Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a dynamic range in excess of 80dB
* RSSI output internal op amp * Post detection amplifier for filtering * Programmable data switch * Excellent sensitivity: 2.24V into 50 matching network for 10dB
SNR (Signal to Noise Ratio) with RF at 110MHz and IF at 9.8MHz
* ESD hardened * Power down mode
ORDERING INFORMATION
DESCRIPTION 24-Pin Plastic TSSOP (Thin Shrink Small Outline Package) TEMPERATURE RANGE -40 to +85C ORDER CODE SA639DH DWG # SOT-355
1998 Feb 10
2
853-1792 18944
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
BLOCK DIAGRAM
24 23 22 21 20 19 18 17 16 15 14 13
IF AMP MIXER
GND LIMITER
OSCILLATOR
FAST RSSI
QUAD
VCC E B RSSI
-+
PWR DWN
+-
+-
DATA
1
2
3
4
5
6
7
8
9
10
11
12
SR00031
Figure 2. Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL VCC VIN TSTG TA Single supply voltage Voltage applied to any other pin1 Storage temperature range Operating ambient temperature range SA6392 PARAMETER RATING -0.3 to 6 -0.3 to (VCC+0.3) -65 to +150 -40 to +85 UNITS V V
C C
NOTE: 1. Except logic input pins (Pins 8 and 12) which can have 6V maximum. 2. JA Thermal impedance (DH package) 117C/W
DC ELECTRICAL CHARACTERISTICS
VCC = +3V, TA = 25C; unless otherwise stated. LIMITS SYMBOL VCC ICC ICC PARAMETER Power supply voltage range DC current drain Standby Input current Input level tON tOFF Power up time Power down time Power up settling time Switch closed Switch open (output tri-state) Input current Switch activation time Pin 8 = LOW, Pin 12 = HIGH Pin 8 = HIGH, Pin 12 = HIGH Pin 8 = LOW Pin 8 = HIGH Pin 8 = LOW Pin 8 = HIGHNO TAG RSSI valid (10% to 90%) RSSI invalid (90% to 10%) Data output valid Pin 12 = LOW, PIN 8 = LOW Pin 12 = HIGH Pin 12 = LOW Pin 12 = HIGH 0.5 0 0.7 VCC 0 0.7VCC 10 5 100 200 0.3 VCC 6 10 4 1 TEST CONDITIONS MIN 2.7 8.33 131.9 -3 SA639 TYP 3.0 8.6 140 8.87 148.1 +3 MAX 5.5 10 500 10 4 0.3VCC 6 s s s V V A s V mA A A V UNITS
NOTE: 1. When the device is forced in power down mode via Pin 8, the Data Switch will output a voltage close to 1.6V and the state of the switch control input will have no effect. 1998 Feb 10 3
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
AC ELECTRICAL CHARACTERISTICS
TA = 25C; VCC = +3V, unless otherwise stated. RF frequency = 110.592MHz ;LO frequency = 120.392MHz; IF frequency = 9.8MHz; RF level = -45dBm; FM modulation = 576kHz with 288kHz peak deviation, discriminator tank circuit Q=4. The parameters listed below are tested using automatic test equipment to assure consistent electrical characteristics. The limits do not represent the ultimate performance limits of the device. Use of an optimized RF layout will improve many of the listed parameters. LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN Mixer/Osc section (ext LO = -14dBm) fIN fOSC Input signal frequency External oscillator (buffer) Noise figure at 110MHz Third-order input intercept point Conversion power gain RF input resistance RF input capacitance Mixer output resistance IF section IF amp gain Limiter gain Input limiting -3dB IF input impedance IF output impedance Limiter input impedance Limiter output impedance Limiter output level with no load RF/IF section (ext LO = -14dBm) Data level Data bandwidth S/N Signal-to-noise ratio AM rejection RF RSSI output with buffer RF RSSI output rise time (10kHz pulse, w/ 9.8MHz filter) (no RSSI bypass capacitor) RF RSSI output fall time (10kHz pulse, w/ 9.8MHz filter) (no RSSI bypass capacitor) RSSI range RSSI accuracy SINAD S/N RF level = -85dBm RF level = -100dBm 9.45 5.8 No modulation for noise 80% AM 1kHz RF level = -90dBm RF level = -45dBm RF level = -10dBm IF frequency = 9.8MHz RF level = -45dBm RF level = -28dBm IF frequency = 9.8MHz RF level = -45dBm RF level = -28dBm 2.0 1.8 80 1.5 12 10 14.55 14.2 s dB dB dB dB 0.8 0.8 s 0 0.5 0.8 RL = 10k, CL = 30pF 260 2.1 56.1 34.8 0.232 0.732 1.032 360 2.4 60 36 0.4 0.9 1.2 2.7 63.9 37.2 0.568 1.068 1.368 0.75 1.3 1.6 V mVP-P MHz dB dB Test at Pin 22 38.86 50.44 40 52 -100 330 330 330 300 130 41.14 53.56 dB dB dBm mVRMS (Pin 24) Single-ended input Matched f1=110.592MHz; f2=110.852MHz 6 0.2 10.4 -11 8.6 500 500 11 -9.5 9.2 800 3.5 330 11.6 -8 11.1 MHz MHz dB dBm dB pF -3 SA639 TYP +3 MAX UNITS
1998 Feb 10
4
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
AC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
(Continued) LIMITS TEST CONDITIONS MIN -3 SA639 TYP +3 MAX UNITS
Post detection filter amplifier Amplifier 3dB bandwidth Amplifier gain Slew rate Input resistance Input capacitance Output impedance Output load resistance Output load capacitance1 DC output level2 Data switch DC input voltage range3 AC input swing Input impedance Input capacitance Output load resistance Through Mode (Pin 12 = LOW) AC voltage gain4 Output drive capability Slew rate Static offset voltage5 Sink/source, VOUT DC = 1.6V VOUT DC = 1.6V VIN DC = 1.2 to 2.0V VIN DC = 1.4 to 2.0V; VCC = 3.0 to 5.0V; RF level = -70 to -40 dBm VIN DC = 1.4 to 2.0V; VCC = 3.0 to 5.0V; RF level = -40 to -5 dBm VOUT DC = 1.2 to 2.0V -7 -0.6 3 >14.0 0.30 1.2 5 +7 mV -10 +10 -1.5 dB mA V/s mV 500 100 5 1.2 1.6 400 2.0 V mVP-P k pF AC coupled AC coupled 1.5 1.682 5 30 1.7 1.718 1.9 150 AC coupled: RL = 10k, CL = 33pF AC coupled: RL = 10k, VOUT DC = 1.6V AC coupled: RL = 10k, CL = 33pF 300 3 800 11.7 12.8 -0.2 2.4 13.8 MHz dB V/s k pF k pF V
Dynamic offset
voltage2, 6
Tri-State Mode (Pin 12 = HIGH) Output leakage current 9.5 20 30.5 100 nA NOTES: 1. Includes filter feedback capacitance, comparator input capacitance. PCB stray capacitances and switch input capacitance. 2. Demodulator output DC coupled with Post Detection Filter Amplifier input and the demodulator tank exactly tuned to center frequency. 3. Includes DC offsets due to frequency offsets between Rx and Tx carrier and demodulator tank offset due to mis-tuning. 4. With a 400mVP-P sinusoid at 600kHz driving Pin 10. Output load resistance 500 in series with 10nF. 5. With a DC input and capacitor in the RC load fully charged. 6. The switch is closed every 10ms for a duration of 40s. The DC offset is determined by calculating the difference of 2 DC measurements, which are determined as follows: 1) The first DC value is measured at the integrating capacitor of the switch when the switch is in the closed position immediately before it opens. The value to be measured is in the middle of the peak-to-peak excursion of the superimposed sine-wave. (DClow + (DChigh - DClow)/2). 2) The second DC value (calculated as above) is measured at Pin 11 immediately after the switch opens, and is the DC value which gives the largest DC offset to the first DC measurement within a 400s DECT burst. Minimum and maximum limits are not tested, however, they are guaranteed by design and characterization using an optimized layout and application circuit. 7. Standard deviations are measured based on application of 60 parts.
1998 Feb 10
5
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
CIRCUIT DESCRIPTION
The SA639 is an IF signal processing system suitable for second IF or single conversion systems with input frequency as high as 1GHz. The bandwidth of the IF amplifier is about 40MHz, with 44dB(v) of gain from a 50 source. The bandwidth of the limiter is about 28MHz with about 58dB(v) of gain from a 50 source. However, the gain/bandwidth distribution is optimized for 9.8MHz, 330 source applications. The overall system is well-suited to battery operation as well as high performance and high quality products of all types, such as digital cordless phones. The input stage is a Gilbert cell mixer with oscillator. Typical mixer characteristics include a noise figure of 11dB, conversion power gain of 9.2dB, and input third-order intercept of -9.5dBm. The oscillator will operate in excess of 1GHz in L/C tank configurations. Hartley or Colpitts circuits can be used up to 100MHz for xtal configurations. Butler oscillators are recommended for xtal configurations up to 150MHz. The output of the mixer is internally loaded with a 330 resistor permitting direct connection to a 330 ceramic filter. The input resistance of the limiting IF amplifiers is also 330. With most 330 ceramic filters and many crystal filters, no impedance matching network is necessary. To achieve optimum linearity of the log signal strength indicator, there must be a 6dB(v) insertion loss between the first and second IF stages. If the IF filter or interstage network does not cause 6dB(v) insertion loss, a fixed or variable resistor can be added between the first IF output (Pin 20) and the interstage network. The signal from the second limiting amplifier goes to a Gilbert cell quadrature detector. One port of the Gilbert cell is internally driven by the IF. The other output of the IF is AC-coupled to a tuned quadrature network. This signal, which now has a 90 phase relationship to the internal signal, drives the other port of the multiplier cell. Overall, the IF section has a gain of 90dB. For operation at intermediate frequency at 9.8MHz. Special care must be given to layout, termination, and interstage loss to avoid instability. The demodulated output (DATA) of the quadrature is a low impedance voltage output. This output is designed to handle a minimum bandwidth of 1MHz. This is designed to demodulate wideband data, such as in DECT applications.
frequency response influence on the filter group delay characteristic at a minimum. At the center of the carrier it is mandatory to provide a filter output DC bias voltage of 1.6V in order to be within the input common mode range of the external data comparator. The filter output DC bias voltage specification holds for an exactly center tuned demodulator tank and for the demodulator output connected to the filter amplifier input.
Data Switch
The SA639 incorporates an active data switch used to derive the data comparator reference voltage by means of an external integration circuit. The data switch is typically closed for 10s before and during reception of the synchronization word pattern, and is otherwise open. The external integration circuit is formed by an R/C low pass with a time constant of 5 to 10s. The active data switch provides excellent tracking behavior over a DC input range of 1.2 to 2.0V. For this range with an RC load (no static current drawn), the DC output voltage will not differ more than 5mV from the input voltage. Since the active data switch is designed to behave like a non-linear charge pump (to allow fast tracking of the input signal without slew rate limitations under dynamic conditions of a 576kHz input signal with 400mVP-P and the RC load), the output signal will have a 340mVP-P output with a DC average that will not vary from the input DC average by more than 10mV. The data switch is able to sink/source 3mA from/to the external integration circuit in order to minimize the settling time after long power-down periods (DECT paging mode). In addition, during power-down conditions a reference voltage of approximately 1.6V will be used as the input to the switch. The switch will be in a low current mode to maintain the voltage on the external RC load. This will further reduce the settling time of the capacitor after power-up. It should be noted that during power-down the switch can only source and sink a trickle current (10A). Thus, the user should make sure that other circuits (like the data comparator inputs) are not drawing current from the RC circuit. The data switch provides a slew rate better than 1V/s in order to track with system DC offset from receive slot to receive slot (DECT idle lock or active mode). When the data switch is opened the output is in a tri-state mode with a leakage current of less than 100nA. This reduces discharge of the external integration circuit. When powered-down, the data switch will output a reference of approximately 1.6V to maintain a charge on the external RC circuit. A Receive Signal Strength Indicator (RSSI) completes the circuitry. The output range is greater than 80dB and is temperature compensated. This log signal strength indicator exceeds the criteria for DECT cordless telephone. This signal drives an internal op amp. The op amp is capable of rail-to-rail output. It can be used for gain, filtering, or 2nd-order temperature compensation of the RSSI, if needed. NOTE: dB(v) = 20log VOUT/VIN
Post Detection Filter Amplifier
The filter amplifier may be used to realize a group delay optimized low pass filter for post detection. The filter amplifier can be configured for Sallen & Key low pass with Bessel characteristic and a 3dB cut frequency of about 800kHz. The filter amplifier provides a gain of 0dB. The output impedance is less than 500 in order to reduce frequency response changes as a result of amplifier load variations. The filter amplifier has a 3dB bandwidth of at least 4 MHz in order to keep the amplifier's
1998 Feb 10
6
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
PIN FUNCTIONS
All DC voltages measured with Pin 8 = Pin 12 = Pin 19 = 0V, Pin 5 = 3V and Pin 9 connected to Pin 10. EQUIVALENT CIRCUIT PIN PIN DC V No. MNEMONIC EQUIVALENT CIRCUIT
VCC
PIN PIN DC V No. MNEMONIC
RSSI 1 RF IN +1.07 6 FEEDBACK +0.20
6
--
+
0.8k 1
0.8k 2 VCC
RF 2 BYPASS +1.07 7
RSSI OUT +0.20
+ -- 7
R
XTAL 3 OSC +1.57
4
18k
POWER 8 DOWN 0.00
8
R MIX
VCC
3
XTAL 4 OSC +2.32
150A
DATA 9 OUT +1.7
9
5
VREF
POST 10 AMP IN +1.70
10
5
VCC
+3.00
BANDGAP
20A
SR00032
Figure 3. Pin Functions 1998 Feb 10 7
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
PIN FUNCTIONS (continued)
PIN PIN DC V No. MNEMONIC EQUIVALENT CIRCUIT PIN PIN DC V No. MNEMONIC LIMITER 16 POST AMP 11 OUT +1.70
11 50A
EQUIVALENT CIRCUIT
DECOUP LIMITER
+1.23
18
17
COUPLING
+1.23
330
LIMITER 18 IN +1.23
17 16
19
R
GND
0
SWITCH 12 CONTROL 0.00
12
IF 20
R
AMP OUT
+1.22
140 20 8.8k
IF AMP SWITCH 13 OUT +1.70
13
21
DECOUP
+1.22
22 330
IF 22 AMP IN +1.22
50A
80k 23 14
21
QUAD 14 IN +3.00
IF AMP
20A
23
DECOUP
+1.22
LIMITER 15 OUT +1.35
15 8.8k
110
MIXER 24 OUT +1.03
400A
24
SR00033
Figure 4. Pin Functions (cont.) 1998 Feb 10 8
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
C28 0.1F SMA RF IN J1 110.592MHz +/-288kHz C2 15pF L1 180nH U1 C1 5-30pF 330nH 68pF
1.5nF
MIXER OUT
1nF
680nH MIXER OUT
1
C3 10nF C5 SMA 120.392MHz LO IN @-10dBm 5-30pF J2 C6 39pF L2 120nH C4 1nF nc
RF IN
24
C26 0.1F 68pF 330pF
2
RF BYPASS
IF AMP DECOUPLING 1
23
0.1F 6.49k IF AMP IN
3
XTAL OSC (EMITTER)
IF IN
22
0.1F 348 50
4
+3V VCC C7 15F GND + C8 100nF R8 10
XTAL OSC (BASE)
IF AMP DECOUPLING 2
21
0.1F 1k IF AMP OUT
5
VCC
IF OUT
20
100pF 50
6
RSSI FEEDBACK
GROUND
19
100pF 330pF 560 680nH
7
RSSI PWR DWN
RSSI OUT
LIMITER IN
18
8
2.2F
PD CTRL
LIMITER DEC1
17
0.1F
6.49k
LIMITER IN
DATA OUT RL 10k
9
CL 30pF
DATA OUT
LIMITER DEC2
16
C18 0.1F C19 0.1F
+ R6 5.6k
348 50
10
POSTAMP IN
LIMITER OUT
15
0.1F 1k J3 R7 5.6k
LIMITER OUT
11
POSTAMP OUT
QUAD IN
14
50
POSTAMP IN
12
2.2F + POSTAMP OUT RL 10k CL 33pF
SW CTRL
SW OUT
13
SA639
R8 510 C14 33pF 10k C15 6.8pF
C13 10nF SW CTRL
SW OUT
R9 1.3k QUAD IN DC
C16 5-30pF
C17 15pF
L3 4.7H
SR00034
Figure 5. SA639 Test Circuit
1998 Feb 10
9
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Temperature and VCC
12
Standby Supply Current vs Temperature and VCC
0.5 0.45 0.4
11
CURRENT (mA)
VCC = 5.5V
CURRENT (mA)
10
0.35 0.3 0.25 0.2 0.15 0.1 0.05 VCC = 2.7V VCC = 3V VCC = 5.5V
9
8 VCC = 3V 7 VCC = 2.7V
6 -40
0
25 TEMPERATURE (C)
70
85
0 -40
0
25 TEMPERATURE (C)
70
85
Mixer Power Gain vs Temperature and VCC
RF = -40dBm, 110.392MHz LO = -10dBm, 120.592MHz 15 14 13 12 GAIN (dB) IP3 (dB) 11 10 9 8 7 6 5 -40 0 25 TEMPERATURE (C) VCC = 2.7V 70 85 VCC = 5.5V VCC = 3V 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -40
Mixer Input IP3 vs Temperature and VCC
RF = -40dBm, 110.392MHz LO = -10dBm, 120.592MHz
VCC = 5.5V VCC = 3V
VCC = 2.7V
0
25 TEMPERATURE (C)
70
85
Limiter and IF Gain vs Temperature and VCC
IF Input = -90dBm, 9.8MHz
Mixer NF vs Temperature and VCC
IF = 11MHz 15 14 13 12 NF (dB) 11 10 9 8 7 6 5 -40 0 25 TEMPERATURE (C) 70 85 VCC = 3V VCC = 5V VCC = 2.7V GAIN (dB) 60 58 56 54 53 50 48 46 44 42 40 38 36 34 -40 IF AMP
LIM Input = -100dBm, 9.8MHz
VCC = 5.5V LIMITER VCC = 3V VCC = 2.7V
VCC = 5.5V VCC = 2.7V
VCC = 3V
0
25 TEMPERATURE (C)
70
85
SR00035
Figure 6. Typical Performance Characteristics 1998 Feb 10 10
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Relative Data Output Level, THD, Noise and AM Rejection vs Temperature
RF = 110MHz, Level = -50dBm Dev. = 288kHz, LO = 119.8MHz, -14dBm, VCC = 3V 20 -10 0 RELATIVE TO DATA OUTPUT (dB) Data -20 -40 THD -60 -80 -100 -40 NOISE AM Rej RELATIVE TO DATA OUTPUT (dB) -20 -30 -40 -50 -60 -70 NOISE -80 -90 -80 -70 -60 -50 -40 -30 -20 -10 -100 -110 0 -90 0 25 TEMPERATURE (C) 70 85 AM REJ THD+N 10 0 Data RSSI
SA639 Receiver RF Performance
RF = 110kHz, LO = 119.8MHz, Data = 430.76mVP-P VCC = 3V, T = 25C, 576kHz sine 1.3 1.2 1.1 1 RSSI (V) 0.9 0.8 0.7 0.6 0.5 0.4 0.3
RF INPUT LEVEL (dBm)
RSSI vs RF Level and Temperature
2 1.8 1.6 1.4 VOLTAGE (V) VOLTAGE (V) 1.2 1 0.8 0.6 0.4 0.4 0.2 0.2 0 -110 -100 -90 -80 -70 -60 -50 RF LEVEL (dBm) -40 -30 -20 -10 0 -110 -100 -40C 25C 85C VCC = 3V 2 1.8 1.6 1.4 1.2 1 0.8 0.6
RSSI vs RF Level and VCC
Temperature = 25C
VCC = 5.5V
VCC = 3V VCC = 2.7V
-90
-80
-70
-60
-50
-40
-30
-20
-10
RF LEVEL (dBm)
Data Output DC Voltage vs Temperature and VCC
2.3 2.2 2.1 VOLTAGE (mVp-p) 2 VCC = 5.5V VOLTAGE (Vdc) 1.9 1.8 1.7 1.6 1.5 1.4 1.3 -40 VCC = 2.7V VCC = 3V
Data Output AC Voltage vs Temperature and VCC
700 650 600 550 500 450 400 350 300 250 200 -40 VCC = 5.5V VCC = 3V VCC = 2.7V
0
25 TEMPERATURE (C)
70
85
0
25
70
85
TEMPERATURE (C)
SR00036
Figure 7. Typical Performance Characteristics (cont.)
1998 Feb 10
11
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Data Output -3dB Bandwidth vs Temperature and VCC
3.5 3.3 3.1 FREQUENCY (MHz) 2.9 FREQUENCY (MHz) 2.7 2.5 2.3 2.1 1.9 1.7 1.5 -40 0 25 TEMPERATURE (C) 70 85 VCC = 2.7V VCC = 3V VCC = 5.5V
Switch -3dB Bandwidth vs Temperature and VCC
10 9 8 7 6 5 4 VCC = 3V 3 2 1 -40 VCC = 2.7V VCC = 5.5V
0
25 TEMPERATURE (C)
70
85
Post Detection Amplifier vs Temperature and VCC
0 -0.1 -0.2 VCC = 2.7V FREQUENCY (MHz) -0.3 GAIN (dB) VCC = 3V -0.4 -0.5 -0.6 -0.7 -0.8 -40 0 25 TEMPERATURE (C) 70 85
Post Detection Amplifier -3dB Bandwidth vs Temperature and VCC
16 9 8 7 6 5 4 3 2 1 -40 0 25 TEMPERATURE (C) 70 85 VCC = 3V VCC = 2.7V VCC = 5.5V
VCC = 5.5V
Switch Output Leakage Current vs Temperature and VCC
60 50 40 30 20 10 0 -10 -20 -40 0 25 70 85 VCC = 3V VCC = 2.7V VOLTAGE (mV) 16 14 12 10 8 CURRENT (nA) VCC = 5.5V 6 4 2 0 -2 -4 -6 -8 -40 TEMPERATURE (C)
Switch Output to Input Offset Voltage vs Temperature and VCC
VCC = 5.5V
VCC = 3V
VCC = 2.7V
0
25
70
85
TEMPERATURE (C)
SR00037
Figure 8. Typical Performance Characteristics (cont.)
1998 Feb 10
12
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
1
200mV
2
5.00mV
-376ns
200ns/
1
RUN
RSSI OUTPUT
tr = 0.79s 90%
RF INPUT 2
f = 110MHz
LEVEL = -28dBm
PULSE MODULATED @ 10kHz t1 = -376.0ns t2 = 412.0ns t = 788.0ns 1/t = 1.269MHz
SR00038
Figure 9. SA639 RSSI Rise Time
1 200mV
2
5.00mV
-1.36us
500ns/
1
RUN
RSSI OUTPUT tf = 1.89s
10%
2
RF INPUT
f = 110MHz
LEVEL = -28dBm PULSE MODULATED @ 10kHz
t1 = -1.36.0s
t2 = 440.0ns
t = 1.800s
1/t = 555.6kHz
SR00039
Figure 10. SA639 RSSI Fall Time
1998 Feb 10
13
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
1
50mV
2
50mV
4
1.0V
2s/div
RF = 110MHz DEV = 288kHz DATA RATE = 576kHz SINE
1
POSTAMP OUTPUT
LO = 119.8MHz
VCC = 3V, T = 27C
DATA SWITCH OUTPUT
2
4
SWITCH ENABLE
ALL CHANNELS ARE DC COUPLED
DATA SWITCH OPEN
SR00040
Figure 11. SA639 System Dynamic Response
1 500mV
2
2.00V
0.00s
50.0ns/
2
RUN
VCC = 3V, T = 25C SWITCH INPUT = 1.6VDC
SWITCH OUTPUT
1
SWITCH ENABLE 2
V1 (1) = 0.000V
V2 (1) = 1.609V
V (1) = 1.609V
SR00041
Figure 12. SA639 Data Switch Activation Time
1998 Feb 10
14
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm
SOT355-1
1998 Feb 10
15
Philips Semiconductors
Product specification
Low voltage mixer FM IF system with filter amplifier and data switch
SA639
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make chages at any time without notice in order to improve design and supply the best possible product. This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.
Production
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- 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 -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- 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 Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 2-98 9397 750 03301
Philips Semiconductors
1998 Feb 10 16

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