TEA5570 查看數據表（PDF） - Philips Electronics
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TEA5570 Datasheet PDF : 19 Pages
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Philips Semiconductors
RF/IF circuit for AM/FM radio
Product specification
TEA5570
GENERAL DESCRIPTION
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 (at Tamb = 25 °C)
Supply voltage
Supply current
AM performance (pin 2) for m = 0,3
Sensitivity
at Vo = 10 mV
at S/N = 26 dB
A.F. output voltage at Vi = 1 mV
Total harmonic distortion at Vi = 1 mV
FM performance (pin 1) for ∆f = ± 22,5 kHz
limiting sensitivity, −3 dB
Signal-to-noise ratio for Vi = 1 mV
A.F. output voltage at Vi = 1 mV
Total harmonic distortion at Vi = 1 mV
AM suppression at Vi = 10 mV
VP = V7-16
typ.
5,4 V
I7
typ.
6,2 mA
Vi
Vi
Vo
THD
Vi
S/N
Vo
THD
AMS
typ.
1,7 µV
typ.
16 µV
typ.
100 mV
typ.
0,5 %
typ.
110 µV
typ.
65 dB
typ.
100 mV
typ.
0,3 %
typ.
50 dB
PACKAGE OUTLINE
16-lead DIL; plastic (SOT38); SOT38-1; 1996 July 25.
September 1987
2
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