TDA1572T Philips Semiconductors, TDA1572T Datasheet - Page 2

• Manufacturer Part Number: TDA1572T
• Description: AM receiver
• Manufacturer: Philips Semiconductors

Philips Semiconductors
GENERAL DESCRIPTION
The TDA1572T integrated AM receiver circuit performs all
the active functions and part of the filtering required 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 RF
signals up to 500 mV.
RF radiation and sensitivity to interference are minimized
by an almost symmetrical design. The controlled-voltage
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 IF
amplifier.
QUICK REFERENCE DATA
PACKAGE OUTLINE
20-lead mini-pack; plastic (SO20; SOT163A); SOT163-1; 1996 August 13.
May 1992
V
I
V
V
V
V
V
P
V
P
iFR(rms)
iRF(rms)
oIF(rms)
oAF(rms)
o
AM receiver
SYMBOL
i
Supply voltage range
Supply current range
RF input voltage (RMS value)
IF output voltage (RMS value)
AF output voltage (RMS value)
AGC range
Change of V
Indicator driver (pin 13)
Output voltage
for (S
for THD = 3%
change of V
N)/N = 6 dB
PARAMETER
i
for 1 dB
oAF
V
m = 30%
m = 80%
V
V
f
f
V
R
i
m
P
i
i
i
= 1 MHz; m = 30%;
L
= 2 mV(rms)
= 2 mV(rms);
= 500 mV(rms);
= 400 Hz
= 2.7 k
= 8.5 V
CONDITIONS
2
Features
Inputs protected against damage by static discharge
Gain-controlled RF stage
Double balanced mixer
Separately buffered, voltage-controlled and
temperature-compensated oscillator, designed for
simple coils
Gain-controlled IF stage with wide AGC range
Full-wave, balanced envelope detector
Internal generation of AGC voltage with possibility of
second-order filtering
Buffered field strength indicator driver with short-circuit
protection
AF preamplifier with possibilities for simple AF filtering
Electronic standby switch
IF output for stereo demodulator and search tuning.
7.5
15
180
240
2.5
MIN.
8.5
25
1.5
500
230
310
86
2.8
TYP.
Product specification
TDA1572T
14.0
28
290
390
3.1
MAX.
V
mA
mV
mV
mV
dB
V
UNIT
V