SBOU254A January   2021  – June 2021 INA2191

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 EVM Kit Contents
    2. 1.2 Related Documentation From Texas Instruments
  3. 2Hardware
    1. 2.1 Features
  4. 3Operation
    1. 3.1 Quick Start Setup
    2. 3.2 Measurements
  5. 4EVM Components
    1. 4.1 R1n, R2n, R3n, R4n, R5n, R6n, C1n, C2n, C4n, C5n
      1. 4.1.1 J5n, J6n, JA1n, JA2n
    2. 4.2 C3n
    3. 4.3 Rs1n and Rs2n (Rshunt)
      1. 4.3.1 R7n, R8n
    4. 4.4 U1n (INA2191)
    5. 4.5 S1n, S2n, S3n, S4n, S5n, S6n, S7n, S8n, S9n, SA1n, SA2n, SA3n, SA4n, SA5n, SA6n, SA7n, SA8n, SA9n
  6. 5Schematic, PCB Layout, and Bill of Materials
    1. 5.1 Schematics
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials
  7. 6Revision History

1 Overview

The INA2191 device is a voltage-output, dual channel, bidirectional current sense amplifier in a DSBGA (12) package. As shown in Table 1-1, the INA2191 has gains that range from 25V/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 plus the bias voltage supplied to the corresponding reference pin. The device can accurately sense voltage drops across shunts at -0.1-V to +40-V common-mode voltages, independent of supply voltage. The device 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 typical of 48 µA per channel at room temperature.

Table 1-1 INA2191 Gain Option Summary
Product INA2191 Gain (V/V)
INA2191A1 25
INA2191A2 50
INA2191A3 100
INA2191A4 200
INA2191A5 500