OPA1632 Datasheet, PDF (10/30 Pages) Texas Instruments – High-Perfomance, Fully-Differential AUDIO OP AMP

OPA1632
SBOS286C – DECEMBER 2003 – REVISED OCTOBER 2015
7.2 Functional Block Diagram
V+
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V_IN−
V_IN+
Vcm Error
+
_
Output Buffer
x1
C
R
C
R
V_OUT+
x1
V_OUT−
Output Buffer
V+
30 kW
V−
30 kW
V−
V_OCM
7.3 Feature Description
Figure 12 and Figure 13 depict the differences between the operation of the OPA1632 fully-differential amplifier
in two different modes. Fully-differential amplifiers can work with differential input or can be implemented as
single in/differential out.
R_f
V_IN− ^R(g)
Vs
V_IN+
R_(g)
V_CC+
−+
V_O+
+−
V_O−
V_OCM
V_CC−
R_f
Note: For proper operation, maintain symmetry by setting
R_f1 = R_f2 = R_f and R_(g)1 = R_(g)2 = R_(g) ⇒ A = R_f/R_(g)
Figure 12. Amplifying Differential Signals
10
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