Datasheet

HIGH-SPEED INSTRUMENTATION
9
6
3
0
-3
-6
-9
-12
-15
-18
Frequency(MHz)
Gain(dB)
1 10 100 400
20log
V
OUT
|V V
1
-
2
|
1/3
OPA3832
1/3
OPA3832
1/3
OPA3832
400W400W
400W
400W 400W
200W 200W
400W
V
2
V
OUT
V
1
OPA3832
SBOS370A – DECEMBER 2006 – REVISED AUGUST 2008 ............................................................................................................................................ www.ti.com
AMPLIFIER
Figure 51 shows an instrumentation amplifier based
on the OPA3832. The offset matching between inputs
makes this an attractive input stage for this
application. The differential-to-single-ended gain for
this circuit is 2.0V/V. The inputs are high impedance,
with only 1pF to ground at each input. The loads on
the OPA3832 outputs are equal for the best harmonic
distortion possible.
Figure 52. High-Speed Instrumentation Amplifier
Response
Figure 51. High-Speed Instrumentation Amplifier
As shown in Figure 52 , the OPA3832 used as an
instrumentation amplifier has a 55MHz, – 3dB
bandwidth. This data plots a 1V
PP
output signal using
a low-impedance differential input source.
20 Submit Documentation Feedback Copyright © 2006 – 2008, Texas Instruments Incorporated
Product Folder Link(s): OPA3832