Datasheet

33.3kW
33.3kW
Æ1 Æ2 Æ2 Æ1
Æ2Æ2
Zer -
Drift
Æ
OUT
REF2
REF1
GND
V+
V+
Output
PRODUCTGAIN
50V/V
100V/V INA286
200V/V INA283
500V/V INA284
1000V/V INA285
INA282
Supply
14V to +80V-
Load
+IN -IN
Æ1 Æ1
INA282, INA283
INA284, INA285
INA286
www.ti.com SBOS485B –NOVEMBER 2009–REVISED SEPTEMBER 2012
UNIDIRECTIONAL OPERATION
Unidirectional operation allows the INA282 family to measure currents through a resistive shunt in one direction.
In the case of unidirectional operation, the output could be set at the negative rail (near ground, and the most
common connection) or at the positive rail (near V+) when the differential input is 0V. The output moves to the
opposite rail when a correct polarity differential input voltage is applied.
The required polarity of the differential input depends on the output voltage setting. If the output is set at the
positive rail, the input polarity must be negative to move the output down. If the output is set at ground, the
polarity is positive to move the output up.
The following sections describe how to configure the output for unidirectional operation.
Ground Referenced Output
When using the INA282 family in this mode, both reference inputs are connected to ground; this configuration
takes the output to the negative rail when there is 0V differential at the input (as Figure 34 shows).
Figure 34. Ground Referenced Output
Copyright © 2009–2012, Texas Instruments Incorporated Submit Documentation Feedback 15
Product Folder Links: INA282 INA283 INA284 INA285 INA286