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
VP
CPS
IF1
RES1
FMON
RES2
IF2
n.c.
n.c.
Vi(det)
Vo(det)
Vref
VF
VFB2
VFB1
GND
VF0
ViIF
VoAF1
VoAF2
