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PCM1742E/2K Fiches technique(PDF) 23 Page - Texas Instruments

No de pièce PCM1742E/2K
Description  24-Bit, 192-kHz Sampling, Enhanced Multilevel, Delta-Sigma, Audio Digital-to-Analog Converter
PDF  40 Pages
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Fabricant  TI2 [Texas Instruments]
Site Internet  https://www.ti.com
Logo TI2 - Texas Instruments

PCM1742E/2K Fiches technique(HTML) 23 Page - Texas Instruments

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V
COM OUTPUT
−
R
1
R
3
R
2
C
1
C
2
V
CC
10 F
(a) Using V
COM to Bias a Single−Supply Filter Stage
(b) Using a Voltage Follower to Buffer V
COM When Biasing Multiple Nodes
(c) Using an INA134 for DC−Coupled Output
x = L or R
10 F
Filtered
Output
OPA337
2
3
1
A
V = −1, where AV =
R
2
R
1
V
OUTx
V
COM
V
COM
P C M 17 4 2
+
+
Buffered
V
COM
V
CC
V+
V−
V
CC
+
1/2
OP A 2353
10 F
P C M 1 74 2
25k
Ω
25k
Ω
49.9k
Ω
1%
25k
Ω
25k
Ω
SENSE
OUT
−IN
+IN
REF
x = L or R
10 F
To Low−Pass
Filter Stage
INA134
V
OUTx
V
COM
P C M 17 4 2
+
µ
µ
µ
µ
PCM1742
SBAS176A – DECEMBER 2000 – REVISED APRIL 2005
One unbuffered common-mode voltage output pin, VCOM (pin 10), is brought out for decoupling purposes. This
pin is nominally biased to a dc voltage level equal to VCC/2. This pin can be used to bias external circuits. An
example of using the VCOM pin for external biasing applications is shown in Figure 27.
Figure 27. Biasing External Circuits Using the VCOM Pin
23



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