TDA1576 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
TDA1576 Datasheet PDF : 16 Pages
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Philips Semiconductors
FM/IF amplifier/demodulator circuit
Product specification
TDA1576
CHARACTERISTICS
VP = 7.5 to 20 V; fIF = 10.7 MHz; RS = 60 Ω; fm = 400 Hz with ∆f = ±22.5 kHz; 50 µs de-emphasis (C8−9 = 6.8 nF);
Tamb = 25 °C and measurements taken in Fig.1; unless otherwise specified. The demodulator circuit is adjusted at
minimum second harmonic distortion for ViIF = 1 mV and a deviation ∆f = ±75 kHz.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Supply
IP
supply current without load
I12 = I13 = 0; VP = 8.5 V
10
I12 = I13 = 0; VP = 15 V
12
IF amplifier/detector
ViIF(rms) input sensitivity (RMS value; pin 15) −3 dB before limiting
−
S------N+-----N--- = 26 dB
−
S------N+-----N--- = 46 dB
−
VoIF(p-p)
output voltage at pins 3 and 7
(peak-to-peak value)
Z3, 7 = 10 pF parallel to
−
1 MΩ
R3-7
output resistance
−
Z4-6
input impedance
−
C4-6
input capacitance
−
R8, 9
output resistance
−
V8, 9
DC output voltage
VP = 8.5 V
−
VP = 15 V
−
VoAF(rms) AF output voltage (RMS value)
QL = 20; VP = 8.5 V
60
QL = 20; VP = 15 V
120
THD
total harmonic distortion
S------N+-----N---
single tuned circuit
two tuned circuits
signal plus noise-to-noise ratio
(pins 8 and 9)
αAM
AM suppression
QL = 20
−
−
B = 250 Hz to 15 kHz;
−
Vi > 1 mV (RMS); VP = 8.5 V
B = 250 Hz to 15 kHz;
−
Vi > 1 mV (RMS); VP = 15 V
ViIF = 10 mV;
−
FM: 70 Hz; ∆f = ±22.5 kHz;
AM: 1 kHz; m = 30%; note 1
ViIF
IF input voltage
α > 40 dB
0.5
α100
hum suppression at f = 100 Hz
VP = 100 mV (RMS);
43
C2 = 47 µF
-∆---V-∆---8-f--o-–---9-
AFC tuning slope at QL = 20
VP = 8.5 V
VP = 15 V
−
−
16
23
18
25
22
30
8
−
35
−
680
−
250
−
30
−
1
−
3.7
−
5.5
−
9.8
−
67
75
135
150
0.1
−
0.02 −
76
−
80
−
54
−
−
500
48
−
8.5
−
17
−
mA
mA
µV
µV
µV
mV
Ω
kΩ
pF
kΩ
V
V
mV
mV
%
%
dB
dB
dB
mV
dB
mV/kHz
mV/kHz
1998 Nov 18
6
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