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TDA1597T

IF amplifier/demodulator for FM radio receivers

Philips Electronics 

Philips Semiconductors

IF amplifier/demodulator for FM radio receivers

Product specification

TDA1597

OPERATING CHARACTERISTICS

VP = 7.5 to 12 V; Tamb = 25 °C; FM-MUTE-ON (I7 = 0); fIF = 10.7 MHz; deviation ±22.5 kHz with fm = 400 Hz;

Vi = 10 mV (RMS) at pin 20; de-emphasis of 50 µs; tuned circuit at pins 10 and 11 aligned for symmetrical stop pulses;

measurements taken in Fig.4; unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

IF amplifier and demodulator

Vi(rms)

input signal for start of limiting

(−3 dB) (RMS value; pin 20)

V7 = Vref; FM-MUTE-OFF

14

22

35

µV

input signal for signal-to-noise

f = 250 to 15000 Hz; V7 = Vref

ratio (RMS value)

S/N = 26 dB

−

15

−

µV

S/N = 46 dB

−

60

−

µV

S/N

signal-to-noise ratio

deviation ±75 kHz

−

82

−

dB

Vo(rms)

AF output signal (RMS value;

pin 4)

180 200 220 mV

THD

total harmonic distortion without

de-emphasis

without detuning

deviation ±75 kHz; fm = 1 kHz; −

I7 = 0

0.1

0.3

%

±25 kHz detuning

deviation ±75 kHz; fm = 1 kHz; −

−

0.6

%

I7 = 0

compensated via pin 3

deviation ±75 kHz; fm = 1 kHz; −

I7 = 0; V7 = Vref

0.07 0.25 %

∆V4

K2 adjustment

∆V4 = V4 (V3 = 0) − V4 (V3 = Vref)

10

−

−

mV

αAM

AM suppression on pin 4

V7 = Vref; m = 30%

Vi = 0.3 to 1000 mV (RMS)

on pin 20

46

55

−

dB

Vi = 1 to 300 mV (RMS)

on pin 20

60

65

−

dB

Dynamic mute attenuation α; note 1

α

dynamic mute attenuation

deviation ±75 kHz;

fm = 100 kHz; V2 = 1 V

−

14

−

dB

1997 Feb 27

8

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