APA2020A
Pin Description (Cont.)
Pin
Name
NC
RVDD
RBYPASS
No
17,23
18
19
RHP IN
20
RLINE IN
21
ROUT+
22
I/O
Description
No internal connection.
I Supply voltage input for right channel.
Connect to voltage divider for right channel internal mild-supply
bias.
I Right channel headphone input, selected when HP/LINE pin (16) is
held high.
I Right channel line input, selected when HP/LINE pin (16) is held
low.
O Right channel + output in BTL mode, + output in SE mode.
Test Information
RF
CI
RI
MUX
4.7µF
CB
SE/BTL
HP/LINE
RL=4 Ω , 8Ω or 32 Ω
Figure 2. BTL Test Circuit
RF
CI
RI
MUX
4.7µF
CB
CO
VDD
SE/BTL
HP/LINE
RL= 4 Ω , 8 Ω
or 32 Ω
Figure 3. SE Test Circuit
Copyright ANPEC Electronics Corp.
7
Rev. A.5 - July., 2002
www.anpec.com.tw