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TDA1072A 데이터시트(Datasheet) 2 Page - NXP Semiconductors

부품명 TDA1072A
상세내용  AM receiver circuit
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제조사  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
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 2 page
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May 1984
2
Philips Semiconductors
Product specification
AM receiver circuit
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
PACKAGE OUTLINE
16-lead DIL; plastic (SOT38); SOT38-1; 1996 August 09.
Supply voltage range
VP
7,5 to 18 V
Supply current range
IP
15 to 30 mA
R.F. input voltage for S
+ N/N = 6 dB at m = 30%
Vi
typ.
1,5
µV
R.F. input voltage for 3% total harmonic
distortion (THD) at m = 80%
Vi
typ.
500 mV
A.F. output voltage with Vi = 2 mV;
fi = 1 MHz; m = 30% and fm = 400 Hz
Vo(af)
typ.
310 mV
A.G.C. range: change of Vi for 1 dB change of Vo(af)
typ.
86 dB
Field strength indicator voltage at
Vi = 500 mV; RL(9) = 2,7 kΩ
VIND
typ.
2,8 V




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