7XNS-A7518DY 데이터 시트보기 (PDF) - Philips Electronics
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7XNS-A7518DY Datasheet PDF : 20 Pages
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Philips Semiconductors
AM receiver circuit
Product specification
TDA1072A
GENERAL DESCRIPTION
The TDA1072A integrated AM receiver circuit performs the active and part of the filtering functions of an AM radio
receiver. It is intended for use in mains-fed home receivers and car radios. The circuit can be used for oscillator
frequencies up to 50 MHz and can handle r.f. signals up to 500 mV. R.F. radiation and sensitivity to interference are
minimized by an almost symmetrical design. The voltage-controlled oscillator provides signals with extremely low
distortion and high spectral purity over the whole frequency range even when tuning with variable capacitance diodes.
If required, band switching diodes can easily be applied. Selectivity is obtained using a block filter before the i.f. amplifier.
Features
• Inputs protected against damage by static discharge
• Gain-controlled r.f. stage
• Double balanced mixer
• Separately buffered, voltage-controlled and temperature-compensated oscillator, designed for simple coils
• Gain-controlled i.f. stage with wide a.g.c. range
• Full-wave, balanced envelope detector
• Internal generation of a.g.c. voltage with possibility of second-order filtering
• Buffered field strength indicator driver with short-circuit protection
• A.F. preamplifier with possibilities for simple a.f. filtering
• Electronic standby switch.
QUICK REFERENCE DATA
Supply voltage range
Supply current range
R.F. input voltage for S + N/N = 6 dB at m = 30%
R.F. input voltage for 3% total harmonic
distortion (THD) at m = 80%
A.F. output voltage with Vi = 2 mV;
fi = 1 MHz; m = 30% and fm = 400 Hz
A.G.C. range: change of Vi for 1 dB change of Vo(af)
Field strength indicator voltage at
Vi = 500 mV; RL(9) = 2,7 kΩ
VP
IP
Vi
Vi
Vo(af)
VIND
7,5 to 18 V
15 to 30 mA
typ. 1,5 µV
typ. 500 mV
typ. 310 mV
typ. 86 dB
typ. 2,8 V
PACKAGE OUTLINE
16-lead DIL; plastic (SOT38); SOT38-1; 1996 August 09.
May 1984
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