AN7280S
s
Pin Descriptions (Cont.)
Pin No.
Pin Name
Description
ICs for FM/AM Tuner
Equivalent Circuit
11
IF-Amp.
IF-Amp. output pin
3kΩ
240Ω
11
Z
OUT
.300Ω
12
IF-Amp. By-pass
IF-Amp. by-pass pin
330Ω
12
14
14
IF-Amp. Input
IF-Amp. input pin
13
IF-Amp. Gain Adjustment
Pin for adjusting IF-Amp. gain by external
resistance
13
340Ω
12kΩ
15
Mix. Output
16
Mixer output pin
15
16
2.2kΩ
17
Mix. By-pass
Mixer by-pass pin
17
18
2.2kΩ
18
Mix. Input
Mixer input pin
V
CC
19
ADX Output
PIN diode driver output pin
Determine maximum current to PIN diode
by Pin19 external resistance value.
19
20
GND
Oscillator GND