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Philips Semiconductors
IF amplifier/demodulator for FM radio receivers
OPERATING CHARACTERISTICS
V
= 7.5 to 12 V; T
= 25 C; FM-MUTE-ON (I
P
amb
V
= 10 mV (RMS) at pin 20; de-emphasis of 50 s; tuned circuit at pins 10 and 11 aligned for symmetrical stop pulses;
i
measurements taken in Fig.4; unless otherwise specified.
SYMBOL
PARAMETER
IF amplifier and demodulator
V
input signal for start of limiting
i(rms)
( 3 dB) (RMS value; pin 20)
input signal for signal-to-noise
ratio (RMS value)
S/N
signal-to-noise ratio
V
AF output signal (RMS value;
o(rms)
pin 4)
THD
total harmonic distortion without
de-emphasis
without detuning
25 kHz detuning
compensated via pin 3
V
K2 adjustment
4
V
= V
(V
4
4
AM suppression on pin 4
AM
V
= 0.3 to 1000 mV (RMS)
i
V
= 1 to 300 mV (RMS)
i
Dynamic mute attenuation ; note 1
dynamic mute attenuation
1997 Feb 27
= 0)
V
(V
= V
)
3
4
3
ref
= 0); f
= 10.7 MHz; deviation 22.5 kHz with f
7
IF
CONDITIONS
V
= V
; FM-MUTE-OFF
7
ref
f = 250 to 15000 Hz; V
S/N = 26 dB
S/N = 46 dB
deviation 75 kHz
deviation 75 kHz; f
= 1 kHz;
m
I
= 0
7
deviation 75 kHz; f
= 1 kHz;
m
I
= 0
7
deviation 75 kHz; f
= 1 kHz;
m
I
= 0; V
= V
7
7
ref
V
= V
; m = 30%
7
ref
on pin 20
on pin 20
deviation 75 kHz;
f
= 100 kHz; V
= 1 V
m
2
8
MIN.
TYP.
14
22
= V
7
ref
15
60
82
180
200
0.1
0.07
10
46
55
60
65
14
Product specification
TDA1597
= 400 Hz;
m
MAX.
UNIT
35
V
V
V
dB
220
mV
0.3
%
0.6
%
0.25
%
mV
dB
dB
dB
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