APPLICATION INFORMATION

Basic Connection

R

S

Load

V

IN+

–16 V to +80 V

I

S

V

IN+

V

IN–

2.7 V to 18 V

V+

OUT

5 k

Ω

INA193A–INA198A

5 k

Ω

Power Supply

INA193A-Q1, INA194A-Q1, INA195A-Q1

INA196A-Q1, INA197A-Q1, INA198A-Q1

closely as possible to the shunt resistor to minimize any resistance in series with the shunt resistance.

Power-supply bypass capacitors are required for stability. Applications with noisy or high-impedance power

supplies may require additional decoupling capacitors to reject power-supply noise. Connect bypass capacitors

close to the device pins.

Figure 1. INA19xA Basic Connection

The input circuitry of the INA19xA can accurately measure beyond its power-supply voltage, V+. For example,

the V+ power supply can be 5 V, whereas the load power-supply voltage is up to 80 V. The output voltage range

of the OUT terminal, however, is limited by the voltages on the power-supply pin.

The accuracy of the INA193A–INA198A current shunt monitors is a function of two main variables:

is usually small.

8

Submit Documentation Feedback

Copyright © 2006–2008, Texas Instruments Incorporated

Product Folder Link(s): INA193A-Q1 INA194A-Q1 INA195A-Q1 INA196A-Q1 INA197A-Q1 INA198A-Q1