Texas Instruments INA827EVM - INA827 Evaluation Module INA827EVM INA827EVM 데이터 시트
제품 코드
INA827EVM
±
IN
R
G
INA827
R
G
+IN
+V
S
V
OUT
REF
±
V
S
V+
VO
U1
+
1
2
U2
3
4
8
7
6
5
10
P
F
0.1
P
F
10
P
F
0.1
P
F
OAV+
10
P
F
V
±
RO
C10
C7
C12
C4
0.1
P
F
10
P
F
0.1
P
F
OAV
±
C11
C5
C6
C9
R3
OAVIN+
0
+
R1
R2
V
±
IN
0
0
V+IN
Sine Wave
0.1 V
PP
+
±
5 V
+
±
5 V
0
+
±
2.5 V
OPA376
Quick Start
Make the following connections to set up the INA827EVM for single-supply operation with a buffered
reference voltage. This example uses an
reference voltage. This example uses an
as the buffer operational amplifier. Depending on the
application, alternative single-supply buffer operational amplifiers include the
and
. The
is a good choice for high-voltage applications. A buffered configuration is useful when the source
impedance is high (for example, a voltage divider). Buffering a high-impedance source with an operational
amplifier provides a low-impedance source, and thus preserves common-mode rejection.
amplifier provides a low-impedance source, and thus preserves common-mode rejection.
1. +5 V to V+ and OAV+ test points.
2. GND to V– and OAV– test points.
3. +2.5 V to OAVIN+ test point.
4. Populate R3 with a 0-
Ω
resistor.
5. Populate C4, C5, C11, and C12 with bypass capacitors.
6. Differential input (for example, a 0.1-V
PP
sine wave) to V–IN and V+IN test points.
7. Oscilloscope to VO test point.
Ensure that R1 = R2 = RO = 0
Ω
and that R
G
, CO, R4, and R5 are not populated.
depicts a
proper dual-supply configuration with a buffered REF voltage.
Figure 5. INA827EVM: Single-Supply Configuration, Buffered REF Connection
6
INA827EVM
SBOU121 – June 2012
Copyright © 2012, Texas Instruments Incorporated