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APPLICATION INFORMATION

Basic Connection

R

S

Load

I

S

V+

OUT

R

L

R

1

R

2

2.7Vto18V

-

16Vto80V

V

IN+

V

IN

-

V

IN+

INA193A INA198A

-

Power Supply

Accuracy Variations as a Result of V

INA193A-EP,, INA194A-EP,, INA195A-EP

INA196A-EP, INA197A-EP, INA198A-EP

SBOS400 – MAY 2007

connected as 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. INA193A–INA198A Basic Connection

The input circuitry of the INA193A–INA198A 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

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