tda1072a NXP Semiconductors, tda1072a Datasheet - Page 2

• Manufacturer Part Number: tda1072a
• Description: Am Receiver Circuit
• Manufacturer: NXP Semiconductors

Philips Semiconductors
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
QUICK REFERENCE DATA
PACKAGE OUTLINE
16-lead DIL; plastic (SOT38); SOT38-1; 1996 August 09.
May 1984
Supply voltage range
Supply current range
R.F. input voltage for S
R.F. input voltage for 3% total harmonic
A.F. output voltage with V
A.G.C. range: change of V
Field strength indicator voltage at
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.
AM receiver circuit
distortion (THD) at m = 80%
f
V
i
= 1 MHz; m = 30% and f
i
= 500 mV; R
L(9)
= 2,7 k
N/N = 6 dB at m = 30%
i
= 2 mV;
i
for 1 dB change of V
m
= 400 Hz
o(af)
2
V
I
V
V
V
V
P
P
i
i
o(af)
IND
Product specification
TDA1072A
typ.
typ.
typ.
typ.
typ.
7,5 to 18 V
15 to 30 mA
500 mV
310 mV
1,5
2,8 V
86 dB
V