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TDA1572T Datenblatt(PDF) 2 Page - NXP Semiconductors

Teilenummer TDA1572T
Bauteilbeschribung  AM receiver
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

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May 1992
2
Philips Semiconductors
Product specification
AM receiver
TDA1572T
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.
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.
QUICK REFERENCE DATA
PACKAGE OUTLINE
20-lead mini-pack; plastic (SO20; SOT163A); SOT163-1; 1996 August 13.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VP
Supply voltage range
7.5
8.5
14.0
V
IP
Supply current range
VP = 8.5 V
15
25
28
mA
RF input voltage (RMS value)
ViFR(rms)
for (S
+ N)/N = 6 dB
m = 30%
1.5
−µV
ViRF(rms)
for THD = 3%
m = 80%
500
mV
VoIF(rms)
IF output voltage (RMS value)
Vi = 2 mV(rms)
180
230
290
mV
AF output voltage (RMS value)
Vi = 2 mV(rms);
fi = 1 MHz; m = 30%;
VoAF(rms)
fm = 400 Hz
240
310
390
mV
AGC range
Change of Vi for 1 dB
∆V
i
change of VoAF
86
dB
Indicator driver (pin 13)
Output voltage
Vi = 500 mV(rms);
Vo
RL = 2.7 kΩ
2.5
2.8
3.1
V


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