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
µ
s; 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
µ
V
input signal for signal-to-noise
ratio (RMS value)
f = 250 to 15000 Hz; V
7
= V
ref
S/N = 26 dB
−
15
−
µ
V
S/N = 46 dB
−
60
−
µ
V
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
= 1 V
−
14
−
dB
