TDA1597 datasheet(8/24 Pages) PHILIPS

8 / 24 page

1997 Feb 27

Philips Semiconductors

Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

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

µV

input signal for signal-to-noise

ratio (RMS value)

f = 250 to 15000 Hz; V7 =Vref

S/N = 26 dB

−

−µV

S/N = 46 dB

−

−µV

S/N

signal-to-noise ratio

deviation

±75 kHz

−

Vo(rms)

AF output signal (RMS value;

pin 4)

180

200

220

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;

I7 =0

−−

0.6

compensated via pin 3

deviation

±75 kHz; f

m = 1 kHz;

I7 =0;V7 =Vref

−

0.07

0.25

∆V4

K2 adjustment

∆V4 =V4 (V3 =0) − V4 (V3 =Vref)

−−

αAM

AM suppression on pin 4

V7 =Vref; m = 30%

Vi = 0.3 to 1000 mV (RMS)

on pin 20

−

Vi = 1 to 300 mV (RMS)

on pin 20

−

Dynamic mute attenuation

α; note 1

dynamic mute attenuation

deviation

±75 kHz;

fm = 100 kHz; V2 =1V

−

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