Document
RF COMMUNICATIONS PRODUCTS
SA614A Low power FM IF system
Product specification Replaces data of December 15, 1994 IC17 Data Handbook 1997 Nov 07
Philips Semiconductors
Philips Semiconductors
Product specification
Low power FM IF system
SA614A
DESCRIPTION
The SA614A is an improved monolithic low-power FM IF system incorporating two limiting intermediate frequency amplifiers, quadrature detector, muting, logarithmic received signal strength indicator, and voltage regulator. The SA614A features higher IF bandwidth (25MHz) and temperature compensated RSSI and limiters permitting higher performance application compared with the SA604. The SA614A is available in a 16-lead dual-in-line plastic and 16-lead SO (surface-mounted miniature) package.
PIN CONFIGURATION
D and N Packages
IF AMP DECOUPLING 1 GND 2 MUTE INPUT 3 VCC 4 16 IF AMP INPUT 15 IF AMP DECOUPLING 14 IF AMP OUTPUT 13 GND 12 LIMITER INPUT 11 LIMITER DECOUPLING 10 LIMITER DECOUPLING 9 LIMITER
RSSI OUTPUT 5 MUTE AUDIO OUTPUT 6
FEATURES
• Low power consumption: 3.3mA typical • Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a dynamic range in excess of 90dB
UNMUTE AUDIO OUTPUT 7 QUADRATURE INPUT 8
SR00323
• Two audio outputs - muted and unmuted • Low external component count; suitable for crystal/ceramic filters • Excellent sensitivity: 1.5µV across input pins (0.22µV into 50Ω
matching network) for 12dB SINAD (Signal to Noise and Distortion ratio) at 455kHz
Figure 1. Pin Configuration
APPLICATIONS
• SA614A meets cellular radio specifications
• Cellular radio FM IF • High performance communications receivers • Intermediate frequency amplification and detection up to 25MHz • RF level meter • Spectrum analyzer • Instrumentation • FSK and ASK data receivers
ORDERING INFORMATION
DESCRIPTION 16-Pin Plastic Dual In-Line Package (DIP) 16-Pin Plastic Small Outline (SO) package (Surface-mount) TEMPERATURE RANGE -40 to +85°C -40 to +85°C ORDER CODE SA614AN SA614AD DWG # SOT38-4 SOT109-1
1997 Nov 07
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853-0594 18663
Philips Semiconductors
Product specification
Low power FM IF system
SA614A
BLOCK DIAGRAM
16 15 14 13
GND IF AMP LIMITER QUAD DET
12
11
10
9
LIMITER
SIGNAL STRENGTH VOLTAGE REGULATOR
MUTE
GND
VCC
1
2
3
4
5
6
7
8
SR00324
Figure 2. Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL VCC TSTG TA θJA Single supply voltage Storage temperature range Operating ambient temperature range SA614A Thermal impedance D package N package PARAMETER RATING 9 -65 to +150 -40 to +85 90 75 UNITS V
°C °C °C/W °C/W
DC ELECTRICAL CHARACTERISTICS VCC = +6V, TA = 25°C; unless otherwise stated.
LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN VCC ICC Power supply voltage range DC current drain Mute switch input threshold (ON) (OFF) 4.5 2.5 1.7 3.3 SA614A TYP MAX 8.0 4.0 1.0 V mA V V UNITS
1997 Nov 07
3
Philips Semiconductors
Product specification
Low power FM IF system
SA614A
AC ELECTRICAL CHARACTERISTICS Typical reading at TA = 25°C; VCC = +6V, unless otherwise stated.
IF frequency = 455kHz; IF level = -47dBm; FM modulation = 1kHz with +8kHz peak deviation. Audio output with C-message weighted filter and de-emphasis capacitor. Test circuit Figure 3. 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 Input limiting -3dB AM rejection Recovered audio level Recovered audio level THD S/N Total harmonic distortion Signal-to-noise ratio No modulation for noise RF level = -118dBm RSSI output1 RF level = -68dBm RF level = -18dBm RSSI range RSSI accuracy IF input impedance IF output impedance Limiter input impedance Unmuted audio output resistance Muted audio output resistance R4 = 100k (Pin 5) R4 = 100k (Pin 5) 1.4 0.85 1.4 0 1.7 3.6 Test at Pin 16 80% AM 1kHz 15nF de-emphasis 150pF de-emphasis -30 25 60 SA614A TYP -92 33 175 530 -42 68 160 2.50 4.80 80 +2.0 1.6 1.0 1.6 58 58 800 3.3 5.8 260 MAX dBm/50Ω dB mVRMS mVRMS dB dB mV V V dB dB kΩ kΩ kΩ kΩ kΩ UNITS
NOTE: 1. SA614A data sheets refer to power at 50Ω input termination; about 21dB less power actually enters the internal 1.5k input. SA614A (50) SA614A (1.5k)/SA615 (1.5k) -97dBm -118dBm -47dBm -68dBm +3dBm -18dBm The SA615 and SA614A are both derived from the same basic die. The SA615 performance plots are directly applicable to the SA614A.
1997 Nov 07
4
Philips Semiconductors
Product specification
Low power FM IF system
SA614A
NE614A TEST CIRCUIT
F1 C4
C1 INPUT R1
Q = 20 LOADED R2 C2 R3 16 15 14 13 12 11 10 C5 C6 F2 9 C7 SA614A
C3 1 2 3 4 5 6 7 8
C8 S1 R4
C9 C10
C12
C11 RSSI OUTPUT
AUDIO OUTPUT
DATA OUTPUT
MUTE INPUT C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 F1 F2 R1 R2 R3 R4 100nF + 80 – 20% 63V K10000–25V Ceramic 100nF +10% 50V 100nF +10% 50V 100nF +10% 50V 100nF +10% 50V 10pF +2% 10.