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Part: SA608D
Category:
Description: SA608; Low Voltage High Performance Mixer FM if System
Company: Philips Semiconductors
Datasheet: Download SA608D datasheet File size : 70 kB
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Philips Semiconductors RF Communications Products
Product specification
Low voltage high performance mixer FM IF system
SA608
DESCRIPTION
The SA608 is a low voltage high performance monolithic FM IF system incorporating a mixer/oscillator, two limiting intermediate frequency amplifiers, quadrature detector, logarithmic received signal strength indicator (RSSI), voltage regulator and audio and RSSI op amps. The SA608 is available in 20-lead dual-in-line plastic, 20-lead SOL (surface-mounted miniature package) and 20-lead SSOP package. The SA608 was designed for portable communication applications and will function down to 2.7V. The RF section is similar to the famous NE605. The audio output is buffered. The RSSI output has an internal amplifier with the feedback pin accessible. The SA608 also has an extra limiter output. This signal is buffered from the output of the limiter and can be used to perform frequency check. This is accomplished by comparing a reference frequency with the frequency check signal using a comparator to a varactor or PLL at the oscillator inputs.
· Low external component count; suitable for
crystal/ceramic/LC filters
PIN CONFIGURATION
D, DK and N Packages
· Excellent sensitivity:
0.31µV into 50 matching network for 12dB SINAD (Signal to Noise and Distortion ratio) for 1kHz tone, 8kHz deviation with RF at 45MHz and IF at 455kHz
RF IN+
1
20 MIXER OUT 19 IF AMP DECOUPLING 18 IF AMP IN 17 IF AMP DECOUPLING 16 IF AMP OUT 15 GND 14 LIMITER IN 13 LIMITER DECOUPLING 12 LIMITER DECOUPLING 11 LIMITER OUT (+)
RF IN 2 DECOUPLING OSC3 4 5 6 7
· SA608 meets cellular radio specifications · Audio output internal op amp · RSSI output internal op amp · Buffered frequency check output · Internal op amps with rail-to-rail outputs · ESD protection: Human Body Model 2kV
Robot Model 200V
OUT OSCIN
RSSI V CC AUDIO
RSSI 8 FEEDBACK FREQ CHECK/ 9 LIM OUT () QUADRATURE 10 IN
APPLICATIONS
· Portable cellular radio FM IF · Cordless phones · Narrow band cellular applications
(NAMPS/NTACS)
FEATURES
3V
· Low power consumption:
3.5mA typical at
· Mixer input to >150MHz · Mixer conversion power gain of 17dB at
45MHz
· XTAL oscillator effective to 150MHz (L.C.
oscillator or external oscillator can be used at higher frequencies)
· RF level meter · Spectrum analyzer · Instrumentation · FSK and ASK data receivers · Log amps · Portable high performance communication
receivers
· 102dB of IF Amp/Limiter gain · 2MHz limiter small signal bandwidth · Temperature compensated logarithmic
Received Signal Strength Indicator (RSSI) with a 90dB dynamic range
· Single conversion VHF receivers · Wireless systems
ORDERING INFORMATION
DESCRIPTION 20-Pin Plastic Dual In-Line Package (DIP) 20-Pin Plastic Small Outline Large (SOL) package (Surface-mount) 20-Pin Plastic Shrink Small Outline Package (SSOP) (Surface-mount) TEMPERATURE RANGE -40 to +85°C -40 to +85°C -40 to +85°C ORDER CODE SA608N SA608D SA608DK DWG # 0408B 0172D 1563
November 3, 1992
2
853-1679 08108
Philips Semiconductors RF Communications Products
Product specification
Low voltage high performance mixer FM IF system
SA608
BLOCK DIAGRAM
20 19 18 17 16 15 14 13 12 11
IF AMP MIXER RSSI
LIMITER
QUAD OSCILLATOR
+ V RE G
+
E
B
AUDIO
1
2
3
4
5
6
7
8
9
10
ABSOLUTE MAXIMUM RATINGS
SYMBOL VCC TSTG TA JA PARAMETER Single supply voltage Storage temperature range Operating ambient temperature range SA608 Thermal impedance D package DK package N package RATING 7 65 to +150 40 to +85 90 117 75 UNITS V
°C °C °C/W
DC ELECTRICAL CHARACTERISTICS
VCC = +3V, TA = 25°C; unless otherwise stated. LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN VCC ICC Power supply voltage range DC current drain 2.7 3.5 SA608 TYP MAX 7.0 4.2 V mA UNITS
November 3, 1992
3
Philips Semiconductors RF Communications Products
Product specification
Low voltage high performance mixer FM IF system
SA608
AC ELECTRICAL CHARACTERISTICS
TA = 25°C; VCC = +3V, unless otherwise stated. RF frequency = 45MHz + 14.5dBV RF input step-up; IF frequency = 455kHz; R17 = 2.4k; R18 = 3.3k; RF level = 45dBm; FM modulation = 1kHz with ±8kHz peak deviation. Audio output with de-emphasis filter and C-message weighted filter. Test circuit 1. The parameters listed below are tested using automatic test equipment to assure consistent electrical characterristics. 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 = 220mVRMS) fIN fOSC Input signal frequency Crystal oscillator frequency Noise figure at 45MHz Thirdorder input intercept point (50 source) Conversion power gain RF input resistance RF input capacitance Mixer output resistance IF section IF amp gain Limiter gain Input limiting 3dB, R17 = 2.4k AM rejection Audio level2 SINAD sensitivity THD S/N Total harmonic distortion Signaltonoise ratio IF RSSI output, R9 = 2k1 No modulation for noise IF level = 118dBm IF level = 68dBm IF level = 23dBm RSSI range RSSI accuracy IF input impedance IF output impedance Limiter input impedance Limiter output impedance Limiter output level Frequency check/lim () output impedance Frequency check/lim () output level RF/IF section (int LO) Audio level System RSSI output System SINAD sensitivity 3V = VCC, RF level = 27dBm 3V = VCC, RF level = 27dBm RF level = 117dBm 120 2.2 12 mVRMS V dB (Pin 11) (Pin 11) (Pin 9) (Pin 9) no load 5k load no load 5k load 1.30 1.3 .70 1.2 RF level 110dB 35 50 source 50 source Test at Pin 18 80% AM 1kHz 35 44 58 109 45 60 17 50 62 0.3 1.1 1.8 90 +1.5 1.5 0.3 1.5 200 130 115 200 130 115 0.8 1.80 2.5 80 dB dB dBm dB mV dB dB dB V V V dB dB k k k mVRMS mVRMS (Pin 20) 1.25 f1 = 45.0; f2 = 45.06MHz Input RF Level = 52dBm Matched 14.5dBV stepup 50 source Singleended input 13.5 150 150 6.2 9 17 +2.5 8 3.0 1.5 4.0 19.5 MHz MHz dB dBm dB dB k pF k SA608 TYP MAX UNITS
NOTE: 1. The generator source impedance is 50, but the SA608 input impedance at Pin 18 is 1500. As a result, IF level refers to the actual signal that enters the SA608 input (Pin 18) which is about 21dB less than the "available power" at the generator. 2. By using 45k load across the Quad detector coil, you will have Audio output at 115mV with 42dB distortion.
November 3, 1992
4
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