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1997 Feb 27 8
Philips Semiconductors Product specification
IF amplifier/demodulator for FM radio receivers TDA1597
OPERATING CHARACTERISTICS
V
P
= 7.5 to 12 V; T
amb
=25°C; FM-MUTE-ON (I
7
= 0); f
IF
= 10.7 MHz; deviation ±22.5 kHz with f
m
= 400 Hz;
V
i
= 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
V
i(rms)
input signal for start of limiting
(−3 dB) (RMS value; pin 20)
V
7
=V
ref
; FM-MUTE-OFF 14 22 35 µV
input signal for signal-to-noise
ratio (RMS value)
f = 250 to 15000 Hz; V
7
=V
ref
S/N = 26 dB − 15 −µV
S/N = 46 dB − 60 −µV
S/N signal-to-noise ratio deviation ±75 kHz − 82 − dB
V
o(rms)
AF output signal (RMS value;
pin 4)
180 200 220 mV
THD total harmonic distortion without
de-emphasis
without detuning deviation ±75 kHz; f
m
= 1 kHz;
I
7
=0
− 0.1 0.3 %
±25 kHz detuning deviation ±75 kHz; f
m
= 1 kHz;
I
7
=0
−−0.6 %
compensated via pin 3 deviation ±75 kHz; f
m
= 1 kHz;
I
7
=0;V
7
=V
ref
− 0.07 0.25 %
∆V
4
K2 adjustment
∆V
4
=V
4
(V
3
=0)−V
4
(V
3
=V
ref
)
10 −−mV
α
AM
AM suppression on pin 4 V
7
=V
ref
; m = 30%
V
i
= 0.3 to 1000 mV (RMS) on pin 20 46 55 − dB
V
i
= 1 to 300 mV (RMS) on pin 20 60 65 − dB
Dynamic mute attenuation α; note 1
α dynamic mute attenuation deviation ±75 kHz;
f
m
= 100 kHz; V
2
=1V
− 14 − dB