5 EVM Components
This section summarizes the INA2290EVM components. For these instructions, n is gain option 1, 2, 3, 4, or 5.
5.1 R2_n, R3_n, R4_n, R6_n, R7_n, R8_n, C2_n, C3_n, C4_n, C5_n
R2_n, R3_n, R4_n, R6_n, R7_n, R8_n are factory-installed 0-Ω 0603 resistors.
C2_n, C3_n, C4_n, C5_n are not populated.
Collectively, these pads allow user-defined filters for the input pins (IN+ and IN–) and the output pin (OUT) of the
INA2290. If a filter is desired, remove these resistors and replace them with > 0-Ω SMT resistors and populate
the capacitor pads with capacitors. Consider the input bias current of the device when using input filtering.
5.2 C1_An
C1_An is a 0.1-µF, power-supply bypass capacitor.
5.3 R1_n, R5_n (Rshunt)
Rshunt is unpopulated, but allows the user to solder down a surface-mount shunt resistor between the In+ and
In– pads sensed by IN+ and IN– input pins. If used, make sure Rshunt has proper power dissipation for the
selected current load and below 5 A. The chosen resistor must have a 2512 footprint.
5.4 U1_n (INA2290)
U1_An is the location for the INA2290An test device.
Consider these factors when selecting the appropriate device gain:
• The differential input voltage is either applied across the inputs or developed based on the load current that
flows through the shunt resistor.
• Make sure that the output voltage does not exceed the supply voltage. This limiting factor requires attention
to device selection.
• The selected device must allow the output voltage to remain within the acceptable range after the developed
input voltage is amplified by the respective device gain. The output voltage must remain within the device-
specified swing limitations for response in the linear range.
• An output below the minimum allowable output requires a device with a higher gain. Likewise, an output
above the maximum allowable output requires a device with a lower gain.
EVM Components
SBOU243A – SEPTEMBER 2020 – REVISED DECEMBER 2020
INA2290EVM
7
Copyright © 2020 Texas Instruments Incorporated
