Overview
3
SBOU218A – February 2019 – Revised April 2019
Copyright © 2019, Texas Instruments Incorporated
INA191EVM
1
Overview
The INA191 device is a voltage-output, high- and low-side measurement current sense amplifier with an
enable pin in a very-small DSBGA package. As shown in
, the INA191 has gains that range from
25 V/V to 500 V/V, depending on the gain option that is selected. The voltage developed across the
device inputs is amplified by the corresponding gain of the specific device, and is presented at the output
pin. The device accurately senses voltage drops across shunts at common-mode voltages from –0.1 V to
40 V, independent of supply voltages. The device operates and survives common-mode voltages from
–0.3 V to +42 V. The device operates with supply voltages between 1.7 V and 5.5 V, and draws a
maximum of 65 µA at room temperature. The low offset of the zero-drift architecture enables sensing of
very-small differential input voltages, which helps widen the usable input dynamic range and minimize
power dissipation in the shunt resistor. Unlike many current sense amplifiers, the INA191 has a very low
input bias current, and thus, can easily measure microamps of current.
Table 1. INA191 Gain Option Summary
Product
Gain (V/V)
INA191A1
25
INA191A2
50
INA191A3
100
INA191A4
200
INA191A5
500
1.1
EVM Kit Contents
summarizes the contents of the INA191EVM kit. Contact the
nearest you if any component is missing. TI also recommends checking the
at
for any further information regarding this product.
Table 2. INA191EVM Kit Contents
Item
Item Part Number
Quantity
INA191EVM test board
INA191EVM
1
Quick Connect Receptacle 10-12AWG, 0.250"
4-520448-2
2
Shunt Connector 2POS
2-881545-2
5
1.2
Related Documentation From Texas Instruments
This document provides information regarding Texas Instruments' integrated circuits used in the assembly
of the INA191EVM.
Table 3. Related Documentation
Document
Literature Number
product data sheet
