TEA5570

INTEGRATED CIRCUITS DATA SHEET TEA5570 RF/IF circuit for AM/FM radio Product specification File under Integrated Circuits, IC01 September 1987 Philips Semiconductors Product specification RF/IF circuit for AM/FM radio GENERAL DESCRIPTION TEA5570 The TEA5570 is a monolithic integrated radio circuit for use in portable receivers and clock radios. The IC is also applicable to mains-fed AM and AM/FM receivers and car radio-receivers. Apart from the AM/FM switch function the IC incorporates for AM a double balanced mixer, 'one-pin' oscillator, i.f. amplifier with a.g.c. and detector, and a level detector for tuning indication. The FM circuitry comprises i.f. stages with a symmetrical limiter for a ratio detector. A level detector for mono/stereo switch information and/or indication complete the FM part. Features Simple d.c. switching for AM to FM by only one d.c. contact to ground (no switch contacts in the i.f. channel, a.f. or level detector outputs) AM and FM gain control Low current consumption (Itot = 6 mA) Low voltage operation (VP = 2,7 to 9 V) Ability to handle large AM signals; good i.f. suppression Applicable for inductive, capacitive and diode tuning Double smoothing of a.g.c. line Short-wave range up to 30 MHz Lumped or distributed i.f. selectivity with coil and/or ceramic filters AM and a.g.c. output voltage control Distribution of PCB wiring provides good frequency stability Economic design for 'AM only' receivers. QUICK REFERENCE DATA (a...