Datasheet

A
1
A
2
A
3
7
50kW50kW
50kW50kW
8
5
4
3
2
1
-IN
+IN
R
G
V+
V-
Device
G=1+
49.4kW
R
G
6
RFIFilter
24.7kW
24.7kW
RFIFilter
Load
V =G (V´ V- )
O IN+ IN-
0.1 Fm
0.1 Fm
+
-
V
O
R
G
Alsodrawninsimplifiedform:
Device
REF
V
O
-IN
+IN
REF
R
(1)
S
R
(1)
S
INA826
www.ti.com SBOS562E –AUGUST 2011–REVISED APRIL 2013
APPLICATION INFORMATION
Figure 58 shows the basic connections required for operation of the INA826. Good layout practice mandates the
use of bypass capacitors placed as close to the device pins as possible.
The output of the INA826 is referred to the output reference (REF) terminal, which is normally grounded. This
connection must be low-impedance to assure good common-mode rejection. Although 5 Ω or less of stray
resistance can be tolerated while maintaining specified CMRR, small stray resistances of tens of ohms in series
with the REF pin can cause noticeable degradation in CMRR.
(1) This resistor is optional if the input voltage stays above [(V–) – 2 V] or the signal source current drive capability is limited to less than 3.5
mA. See the Input Protection section for more details.
Figure 58. Basic Connections
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Product Folder Links: INA826