SA627D datasheet(2/16 Pages) PHILIPS

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Philips Semiconductors

Product specification

SA627

High performance low power mixer FM IF system

with high-speed RSSI

1997 Nov 07

853-1649 18664

DESCRIPTION

The SA627 has faster RSSI rise and fall times. The SA627 is a high

performance monolithic low-power FM IF system incorporating a

mixer/oscillator, two limiting intermediate frequency amplifiers,

quadrature detector, muting, logarithmic received signal strength

indicator (RSSI) with fast rise and fall time, voltage regulator and

frequency check/limiter out (–). The SA627 also has an extra limiter

output. This signal is buffered from the output of the limiter and

provides a negative (–) limiter output. This can be used to provide a

frequency check function. The SA627 is available in 20-lead SOL

(surface-mounted miniature package) and 20-lead SSOP (shrink

small outline package).

FEATURES

• Fast RSSI rise and fall times

• Low power consumption: 5.8mA typical at 6V

• Mixer input to >500MHz

• Mixer conversion power gain of 13dB at 45MHz

• Mixer noise figure of 4.6dB at 45MHz

• XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz local

oscillator can be injected)

• 102dB of IF Amp/Limiter gain

• 25MHz limiter small signal bandwidth

• Temperature compensated logarithmic Received Signal Strength

Indicator (RSSI) with a dynamic range in excess of 90dB

• Audio output - mutable

• Low external component count; suitable for crystal/ceramic/LC

filters

• Excellent sensitivity: 0.22µV into 50Ω matching network for 12dB

SINAD (Signal to Noise and Distortion ratio) for 1kHz tone, 8kHz

deviation with RF at 45MHz and IF at 455kHz

• SA627 meets cellular radio specifications

• ESD hardened

PIN CONFIGURATION

RFIN 1

RF BYPASS 2

XTAL OSC

MUTEIN 5

RSSIOUT 7

20 MIXER OUT

18 IF AMP IN

16 IF AMP OUT

15 GND

14 LIMITER IN

LIMITER OUT (+)

VCC 6

D and DK Packages

MUTED AUDIO OUT 8

QUADRATURE IN

IF AMP DECOUPLING

LIMITER DECOUPLING

FREQ CHECK/ LIM OUT (–)

SR00481

Figure 1. Pin Configuration

APPLICATIONS

• Digital cellular base stations

• High performance communications receivers

• Single conversion VHF/UHF receivers

• SCA receivers

• RF level meter

• Spectrum analyzer

• Instrumentation

• FSK and ASK data receivers

• Log amps

• Wideband low current amplification

• Digital cordless telephones

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

20-Pin Plastic Small Outline Large (SOL) package (Surface-mount)

-40 to +85

°C

SA627D

SOT163-1

20-Pin Plastic Shrink Small Outline Package (SSOP) (Surface-mount)

-40 to +85

°C

SA627DK

SOT266-1

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