Philips Semiconductors

Product specification

SA624

High performance low power FM IF system with

high-speed RSSI

2

1997 Nov 07

853-1647 18664

DESCRIPTION

The SA624 is pin-to-pin compatible with the SA604A, but has faster

RSSI rise and fall time. The SA624 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 SA624

features higher IF bandwidth (25MHz) and temperature

compensated RSSI and limiters permitting higher performance

application compared with the SA604. The SA624 is available in

16-lead SO (surface-mounted miniature) package.

FEATURES

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

matching network) for 12dB SINAD (Signal to Noise and Distortion

ratio) at 455kHz

PIN CONFIGURATION

D Package

IF AMP DECOUPLING 1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

15

GND

MUTE INPUT

RSSI OUTPUT

MUTE AUDIO OUTPUT

UNMUTE AUDIO OUTPUT

QUADRATURE INPUT

IF AMP INPUT

IF AMP DECOUPLING

IF AMP OUTPUT

GND

LIMITER INPUT

LIMITER DECOUPLING

LIMITER DECOUPLING

LIMITER

VCC

SR00440

Figure 1. Pin Configuration

APPLICATIONS

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

16-Pin Plastic Small Outline (SO) package (Surface-mount)

-40 to +85

°C

SA624D

SOT109-1

ABSOLUTE MAXIMUM RATINGS

SYMBOL

PARAMETER

RATING

UNITS

Single supply voltage

9

V

Storage temperature range

-65 to +150

°C

Operating ambient temperature range SA624

-40 to +85

°C

Thermal impedance

D package

90

°C/W