ADC

Power

Supply

Load

0.1µF

5V Supply

-

+

IN-

IN+

GND

V+

OUT

REF

Micro-

controller

14

INA210, INA211, INA212, INA213, INA214, INA215

SBOS437I – MAY 2008 – REVISED SEPTEMBER 2016

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Product Folder Links: INA210 INA211 INA212 INA213 INA214 INA215

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Copyright © 2008–2016, Texas Instruments Incorporated

8.3 Feature Description

8.3.1 Basic Connections

Figure 23 shows the basic connections of the INA210-INA215. Connect the input pins (IN+ and IN–) as closely

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

Figure 23. Typical Application

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.

On the RSW package options, two pins are provided for each input. Tie these pins together (that is, tie IN+ to

IN+ and tie IN– to IN–).

The zero-drift offset performance of the INA210-INA215 offers several benefits. Most often, the primary

advantage of the low offset characteristic enables lower full-scale drops across the shunt. For example, non-

zero-drift current shunt monitors typically require a full-scale range of 100 mV.

The INA210-INA215 series gives equivalent accuracy at a full-scale range on the order of 10 mV. This accuracy

reduces shunt dissipation by an order of magnitude with many additional benefits.

Alternatively, there are applications that must measure current over a wide dynamic range that can take

advantage of the low offset on the low end of the measurement. Most often, these applications can use the lower

gains of the INA213, INA214, or INA215 to accommodate larger shunt drops on the upper end of the scale. For

instance, an INA213 operating on a 3.3-V supply can easily handle a full-scale shunt drop of 60 mV, with only

100 μV of offset.