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TEA5594

AM/FM radio receiver circuit

Philips Electronics 

Philips Semiconductors

AM/FM radio receiver circuit

Product specification

TEA5594

GENERAL DESCRIPTION

The TEA5594 is a 32-pin integrated radio circuit designed

for use in all Electronic Tuned Radio (ETR) sets especially

those sets which have to fulfil the immunity requirements

of CENELEC.

The AM circuit incorporates:

• A double balanced mixer

• A ‘one-pin’ oscillator with amplitude control operating in

the LW/MW frequency range

• An IF amplifier and AM detector

• An AGC circuit which controls the IF amplifier and mixer

The FM circuit incorporates:

• A front-end (fulfilling the “out of band” CENELEC

requirements)

• Two IF amplifiers (for distributed selectivity)

• A quadrature demodulator with a ceramic filter

The TEA5594 also contains:

• Oscillator output buffers for AM and FM

• A combined AM/FM IF counter output buffer with

counter “enable” function

• A field strength level detector for AM and FM

• A soft mute circuit at FM, adjustable

• An extra IF amplifier to split up IF filtering

Features

• Low distortion on FM

• AM/FM level/indicator circuit

• A DC AM/FM switch facility

• Supply voltages 2.7 to 15 V

• A local distance switch facility (LOCAL-DX) at FM

• All pins are ESD protected

PACKAGE OUTLINE

32-lead shrink DIL; plastic (SOT232); SOT232-1; 1996 September 9.

March 1991

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