Operating characteristics – Philips TDA1596T User Manual
Page 10
April 1991
10
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
OPERATING CHARACTERISTICS
f = 10.7 MHz; V
I
= V
20(rms)
= 1 mV; deviation (
∆
f) = 22.5 kHz; modulation frequency (f
m
) = 400 Hz; de-emphasiss (pin 4)
= 50
µ
s; test circuit as per Fig.3; tuned circuit (Q
L
= 19) aligned for symmetrical stop pulses; T
amb
=
+
25
°
C; unless
otherwise specified
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
V
4(rms)
AF output voltage (RMS value) at
V
20(rms)
= 10 mV
180
200
220
mV
V
20(rms)
Start of limiting (FM, mute-off); (RMS value)
(Fig.13)
14
22
35
µ
V
Dependence of signal-to-noise ratio (in noise
frequency band 250 Hz to 15 kHz, unweighted)
on input voltage
V
18(rms)
for S/N = 26 dB
−
15
−
µ
V
V
18(rms)
for S/N = 46 dB
−
60
−
µ
V
S/N
at V
20(rms)
= 10 mV;
∆
f = 75 kHz
−
82
−
dB
THD
THD (FM, mute-on) at V
20(rms)
= 10 mV;
∆
f = 75
kHz; f
m
= 1 kHz; without detuning; without
de-emphasis; I
7
= 0 mA
−
0.1
0.3
%
α
D
Dynamic mute attenuation (Fig.14)
−
16
−
dB
with f
m
= 100 kHz;
∆
f = 75 kHz
α
D
∆
f
Slope of attenuation curve
−
0.8
−
dB/kHz
THD (FM, mute-on) at V
20(rms)
= 10 mV;
∆
f = 75 kHz; f
m
= 1 kHz;
detuning
≤±
25 kHz without
THD
de-emphasis; I
7
= 0 mA (Fig.15)
−
−
0.6
%
THD (FM, mute-off and compensated via
pin 3) at V
20(rms)
= 10 mV;
∆
f = 75 kHz; f
m
= 1 kHz;
THD
V
7
= V
5
−
0.07
0.25
%
V
3
Voltage range at pin 3 for THD compensation
0
−
V
5
V
AM suppression (FM, mute-off) with amplitude
modulation at 30% input voltage range
V
20
= 300
µ
V to 100 mV (Fig.16)
−
65
−
dB
Power supply ripple rejection = 20log [
∆
V
1
/
∆
V
4
]
33
36
−
dB
Mute attenuation (FM-off)
= 20log [V
4(FM-on
/V
4(FM-off)
]
60
−
−
dB
α
D
20
V
4
FM mute
off
)
–
(
V
4
FM mute
,
(
on
)
–
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