Datasheet

PCM1753
PCM1754
PCM1755
SLES092C – OCTOBER 2003 – REVISED FEBRUARY 2009
www.ti.com
24
V
COM
Output
One unbuffered common-mode voltage output pin, V
COM
(pin 10) is brought out for decoupling purposes. This
pin is nominally biased to a dc voltage level equal to 0.5 V
CC
. This pin can be used to bias external circuits.
Figure 27 shows an example of using the V
COM
pin for external biasing applications.
–
–
V
COM
OPA337
+
10 μF
+
PCM1753/54/55
Buffered V
COM
V
CC
V
OUT
X
(1)
10 μF
+
PCM1753/54/55
A
V
+*1, where A
V
+*
R
2
R
1
V
COM
(1)
X = L or R
1/2
OPA2353
+
Filtered
Output
V
CC
2
3
1
C
1
R
3
R
2
C
2
R
1
10 μF
+
(a) Using V
COM
to Bias a Single-Supply Filter Stage
(b) Using a Voltage Follower to Buffer V
COM
When Biasing Multiple Nodes
Figure 27. Biasing External Circuits Using the V
COM
Pin