V

3

5

6

3

INA592

V

2

R

3

Ref

R

1

R

2

R

4

V

2

12 kW

12 kW

6 kW

6 kW

R

L

1 µF

V–

4

1 µF

V+

7

1

Copyright © 2018, Texas Instruments Incorporated

10

INA592

SBOS914 – OCTOBER 2018

www.ti.com

Product Folder Links: INA592

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Copyright © 2018, Texas Instruments Incorporated

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

Figure 9 shows the basic connections required for operation of the INA592. Connect power supply bypass

capacitors close to the device pins.

The differential input signal is connected to pins 2 and 3 as shown. The source impedances connected to the

inputs must be nearly equal to provide good common-mode rejection. An 8-Ohms mismatch in source

impedance degrades the common- mode rejection of a typical device to approximately 80 dB. Gain accuracy is

also slightly affected. If the source has a known impedance mismatch, an additional resistor in series with one

input can be used to preserve good common-mode rejection.

As shown in Figure 9, sense measurements at the load.

8.2 Typical Application

Figure 9. Basic Power Supply and Signal Connections

8.2.1 Design Requirements

For the application shown in Figure 9, the design requirements are:

• Gain of G = ½