SBOU279A March   2022  – November 2022 INA241A , INA241B

 

  1.    INA241EVM Abstract
  2.   Trademarks
  3. 1General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  4. 2Overview
    1. 2.1 EVM Kit Contents
    2. 2.2 Related Documentation From Texas Instruments
  5. 3Hardware
    1. 3.1 Features
  6. 4Operation
    1. 4.1 Quick Start Setup
    2. 4.2 Measurements
  7. 5EVM Components
    1. 5.1 R1_n, R2_n, R3_n, C2_n, C5_n
    2. 5.2 C1_n
    3. 5.3 R4_n
    4. 5.4 U1_n (INA241x)
  8. 6Schematic, PCB Layout, and Bill of Materials
    1. 6.1 Schematic
    2. 6.2 PCB Layout
    3. 6.3 Bill of Materials
  9. 7Revision History

2 Overview

The INA241x device is a voltage-output, high-side current sense amplifier in a small SOT-23 (8) package with enhanced common-mode PWM rejection and bandwidth of 1 Mhz for all gain options. As shown in Table 2-1, the INA241x has gains that range from 10 V/V to 200 V/V, depending on the gain option that is selected. The only difference between the INA241AEVM and INA241BEVM options is which software version is installed on the device: "A" or "B". 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 can accurately sense voltage drops across shunts at –4-V to +110-V common-mode voltages. The device survives common-mode voltages from –20 V to +120 V. The device operates with supply voltages between 2.7 V and 20 V, and draws a typical of 2.5 mA at room temperature.

Table 2-1 INA241x Gain Option Summary
Product Gain (V/V)
INA241A1,

INA241B1

10
INA241A2,

INA241B2

20
INA241A3,

INA241B3

50
INA241A4,

INA241B4

100
INA241A5,

INA241B5

200