6.3.3 Low Input Bias Current

The INA950-SEP input bias current draws 20μA (typical) even with common-mode voltages as high as 80V. This

current enables precision current sensing in applications where the sensed current is small or in applications that

require lower input leakage current.

6.3.4 Low VSENSE Operation

The INA950-SEP enables accurate current measurement across the entire valid VSENSE range. The zero-drift

input architecture of the INA950-SEP provides the low offset voltage and low offset drift required to measure

low VSENSE levels accurately across the wide operating temperature of –55°C to +125°C. The capability to

measure low sense voltages enables accurate measurements at lower load currents, and also allows reduction

of the sense resistor value for a given operating current, which minimizes the power loss in the current-sensing

element.

6.3.5 Wide Fixed-Gain Output

The INA950-SEP gain error is < 0.1% at room temperature for most gain options, with a maximum drift of

5ppm/°C over the full temperature range of –55°C to +125°C.

The INA950-SEP closed-loop gain is set by a precision, low-drift internal resistor network. The ratio of these

resistors are excellently matched, although the absolute values can vary significantly. TI does not recommend

adding additional resistance around the INA950-SEP to change the effective gain because of this variation.

Table 6-1 describes the typical values of the internal gain resistors seen in the functional diagram above.

Table 6-1. Fixed Gain Resistors

GAIN

R1

RL

20 (V/V)

25kΩ

500kΩ

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INA950-SEP

SBOSAK8 – MARCH 2025

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