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1997 Feb 27 2
Philips Semiconductors Product specification
IF amplifier/demodulator for FM radio receivers TDA1597
FEATURES
• Balanced limiting amplifier
• Balanced coincidence demodulator
• Two open-collector stop pulse outputs for
microcomputer tuning control
• Simulated behaviour of ratio detector (internal field
strength and detuning dependent voltage for dynamic
AF signal muting)
• Mono/stereo blend field strength indication control
voltage
• AFC output
• 3-state mode switch for FM-MUTE-ON, FM-MUTE-OFF
and FM-OFF
• Internal compensation of AF signal Total Harmonic
Distortion (THD)
• Built-in hum and ripple rejection circuits.
GENERAL DESCRIPTION
The TDA1597 provides IF amplification, symmetrical
quadrature demodulation and level detection for quality
home and car FM radio receivers and is suitable for mono
and stereo reception. It may also be applied to common
front-ends, stereo decoders and AM receivers circuits.
All pin numbers mentioned in this data sheet refer to the
SO version (TDA1597T) unless otherwise specified.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
supply voltage 7.5 8.5 12 V
I
P
supply current (l
2
=I
7
=0) − 20 26 mA
V
iIF(rms)
IF input sensitivity for limiting on pin 20
(RMS value)
14 22 35 µV
V
oAF(rms)
AF output signal on pin 4 (RMS value) 180 200 220 mV
S/N signal-to-noise ratio f
m
= 400 Hz;
∆f=±75 kHz
− 82 − dB
THD total harmonic distortion f
m
= 1 kHz;
∆f=±75 kHz
− 0.1 0.3 %
K2 adjustment and
FM-MUTE-OFF
− 0.07 0.25 %
T
amb
operating ambient temperature −40 − +85 °C
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
TDA1597 DIP18 plastic dual in-line package; 18 leads (300 mil) SOT102-1
TDA1597T SO20 plastic small outline package; 20 leads; body width 7.5 mm SOT163-1