Pin Functions
Pin No.
Function
1
INT in
27
2
Gain CTL
26 AMP in
3
Gain CTL
25 AMP N out
LA7471M
Internal Circuit
DC Voltage
Unit (resistance: Ω)
Description
2.1 V
Internal microphone input
The input impedance is 75 kΩ.
2.1 V
Gain control amplifier input
The input impedance is 100 kΩ.
2.1 V
Gain control amplifier inverted output
4
Gain CTL
24 AMP out
5
Mix AMP
23 NFB
6
Mix AMP
22 out
7
HPF in
21
2.1 V
Gain control amplifier output
2.1 V
Mixer amplifier NFB pin
2.1 V
Mixer amplifier output
2.1 V
High-pass filter amplifier input
This is a high impedance input.
No. 4488-6/10