Datasheet

Supply Bypass
Capacitor
VIA to Power or
Ground Plane
VIA to Ground
Plane
Supply
Voltage
Output Signal
Trace
REF
GND
V+
IN+
IN-
OUT
INA210 , INA211 , INA212 , INA213 , INA214 , INA215
www.ti.com SBOS437F –MAY 2008–REVISED JUNE 2014
10 Power Supply Recommendations
The input circuitry of the INA210-INA215 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 can be as high as 26 V.
However, the output voltage range of the OUT pin is limited by the voltages on the power-supply pin. Note also
that the INA210-INA215 can withstand the full input signal range up to 26 V at the input pins, regardless of
whether the device has power applied or not.
11 Layout
11.1 Layout Guidelines
• Connect the input pins to the sensing resistor using a Kelvin or 4-wire connection. This connection technique
ensures that only the current-sensing resistor impedance is detected between the input pins. Poor routing of
the current-sensing resistor commonly results in additional resistance present between the input pins. Given
the very low ohmic value of the current resistor, any additional high-current carrying impedance can cause
significant measurement errors.
• The power-supply bypass capacitor should be placed as closely as possible to the supply and ground pins.
The recommended value of this bypass capacitor is 0.1 μF. Additional decoupling capacitance can be added
to compensate for noisy or high-impedance power supplies.
11.2 Layout Example
Figure 34. Recommended Layout
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Product Folder Links: INA210 INA211 INA212 INA213 INA214 INA215