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1998 Nov 18 4
Philips Semiconductors Product specification
FM/IF amplifier/demodulator circuit TDA1576T
PINNING
SYMBOL PIN DESCRIPTION
V
P
1 positive supply voltage
C
PS
2 smoothing capacitor of power supply
IF1 3 IF signal to resonant circuit
RES1 4 resonant circuit input 1
FMON 5 FM-ON, standby switch
RES2 6 resonant circuit input 2
IF2 7 IF signal to resonant circuit
V
oAF1
8 AF output voltage 1 (0° phase)
V
oAF2
9 AF output voltage 2 (180° phase)
n.c. 10 not connected
n.c. 11 not connected
V
i(det)
12 detune detector input voltage for
external audio reference
V
o(det)
13 detune detector output voltage
V
ref
14 reference voltage output
V
F
15 level output for field strength
V
F0
16 zero adjust voltage for field strength
V
iIF
17 FM/IF input signal voltage
V
FB2
18 DC feedback 2
V
FB1
19 DC feedback 1
GND 20 ground (0 V)
Fig.2 Pin configuration.
handbook, halfpage
TDA1576T
MEH140
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
P
C
PS
IF1
RES1
FMON
RES2
IF2
n.c. n.c.
V
i(det)
V
o(det)
V
ref
V
F
V
FB2
V
FB1
GND
V
F0
V
iIF
V
oAF1
V
oAF2