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INA241B

ACTIVE

-5-V to 110-V bidirectional high-precision current sense amplifier with enhanced PWM rejection

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Data sheet

INA241B

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 110 Common-mode voltage (min) (V) -5 Input offset (±) (max) (µV) 150 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 10, 20, 50, 100, 200 CMRR (min) (dB) 120 Bandwidth (kHz) 1100 Supply voltage (max) (V) 20 Supply voltage (min) (V) 2.7 Iq (max) (mA) 3.2 Number of channels 1 Comparators (#) 0 Gain error (%) 0.1 Gain error drift (±) (max) (ppm/°C) 5 Slew rate (V/µs) 8 Features Bidirectional, Enhanced PWM Rejection, High precision, Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 110 Common-mode voltage (min) (V) -5 Input offset (±) (max) (µV) 150 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 10, 20, 50, 100, 200 CMRR (min) (dB) 120 Bandwidth (kHz) 1100 Supply voltage (max) (V) 20 Supply voltage (min) (V) 2.7 Iq (max) (mA) 3.2 Number of channels 1 Comparators (#) 0 Gain error (%) 0.1 Gain error drift (±) (max) (ppm/°C) 5 Slew rate (V/µs) 8 Features Bidirectional, Enhanced PWM Rejection, High precision, Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Enhanced PWM rejection optimized for systems subject to switching common-mode voltages
    • Supports switching frequencies up to 125 kHz
  • Wide common-mode voltage:
    • Operational voltage: −5 V to +110 V
    • Survival voltage: −20 V to +120 V
  • Bidirectional operation
  • High small signal bandwidth: 1.1 MHz (at all gains)
  • Slew rate: 8 V/µs
  • Step response settling time to 1%: 1 µs
  • Excellent CMRR
    • 166 dB DC-CMRR
    • 104 dB AC-CMRR at 100 kHz
    • 89 dB AC-CMRR at 1 MHz
  • Accuracy:
    • Gain error (maximum)
      • Version A: ±0.01%, ±1 ppm/°C drift
      • Version B: ±0.1%, ±5 ppm/°C drift
    • Offset voltage (maximum)
      • Version A: ±10 µV, ±0.1 µV/°C drift
      • Version B: ±150 µV, ±0.5 µV/°C drift
  • Available gains:
    • INA241A1, INA241B1 : 10 V/V
    • INA241A2, INA241B2 : 20 V/V
    • INA241A3, INA241B3 : 50 V/V
    • INA241A4, INA241B4 : 100 V/V
    • INA241A5, INA241B5 : 200 V/V
  • Package options: SOT23-8, VSSOP-8, SOIC-8, VSSOP-10
  • Enhanced PWM rejection optimized for systems subject to switching common-mode voltages
    • Supports switching frequencies up to 125 kHz
  • Wide common-mode voltage:
    • Operational voltage: −5 V to +110 V
    • Survival voltage: −20 V to +120 V
  • Bidirectional operation
  • High small signal bandwidth: 1.1 MHz (at all gains)
  • Slew rate: 8 V/µs
  • Step response settling time to 1%: 1 µs
  • Excellent CMRR
    • 166 dB DC-CMRR
    • 104 dB AC-CMRR at 100 kHz
    • 89 dB AC-CMRR at 1 MHz
  • Accuracy:
    • Gain error (maximum)
      • Version A: ±0.01%, ±1 ppm/°C drift
      • Version B: ±0.1%, ±5 ppm/°C drift
    • Offset voltage (maximum)
      • Version A: ±10 µV, ±0.1 µV/°C drift
      • Version B: ±150 µV, ±0.5 µV/°C drift
  • Available gains:
    • INA241A1, INA241B1 : 10 V/V
    • INA241A2, INA241B2 : 20 V/V
    • INA241A3, INA241B3 : 50 V/V
    • INA241A4, INA241B4 : 100 V/V
    • INA241A5, INA241B5 : 200 V/V
  • Package options: SOT23-8, VSSOP-8, SOIC-8, VSSOP-10

The INA241x is an ultra-precise, bidirectional current sense amplifier than can measure voltage drops across shunt resistors over a wide common-mode range from –5 V to 110 V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±10 µV, maximum), small gain error (±0.01%, maximum) and a high DC CMRR (typical 166 dB). The INA241x is designed for high voltage, bidirectional measurements in switching systems that see large common-mode voltage transients at the device’s inputs. The enhanced PWM rejection circuitry inside the INA241x ensures minimal signal disturbance at the output due to the common-mode voltage transitions at the input.

The INA241x operates from a single 2.7 V to 20 V supply, drawing 2.5 mA of supply current. The INA241x is available in five gain options: 10 V/V, 20 V/V, 50 V/V, 100 V/V, and 200 V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.

The INA241x is specified over operating temperature range of −40°C to +125°C.

The INA241x is an ultra-precise, bidirectional current sense amplifier than can measure voltage drops across shunt resistors over a wide common-mode range from –5 V to 110 V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±10 µV, maximum), small gain error (±0.01%, maximum) and a high DC CMRR (typical 166 dB). The INA241x is designed for high voltage, bidirectional measurements in switching systems that see large common-mode voltage transients at the device’s inputs. The enhanced PWM rejection circuitry inside the INA241x ensures minimal signal disturbance at the output due to the common-mode voltage transitions at the input.

The INA241x operates from a single 2.7 V to 20 V supply, drawing 2.5 mA of supply current. The INA241x is available in five gain options: 10 V/V, 20 V/V, 50 V/V, 100 V/V, and 200 V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.

The INA241x is specified over operating temperature range of −40°C to +125°C.
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Type Title Date
* Data sheet INA241x–5 V to 110 V, Bidirectional, Ultra-Precise Current Sense AmplifierWith Enhanced PWM Rejection datasheet (Rev. C) PDF | HTML 20 Oct 2023
Application brief Current Sensing in Collaborative and Industrial Robotic Arms (Rev. B) PDF | HTML 24 Jul 2023
Application brief Current Mode Control in Switching Power Supplies (Rev. E) PDF | HTML 12 Apr 2023
Application brief Current Sensing in Mobile Robots PDF | HTML 29 Nov 2022
EVM User's guide INA241xEVM User's Guide (Rev. A) PDF | HTML 17 Nov 2022
Certificate INA241BEVM EU RoHS Declaration of Conformity (DoC) 16 Nov 2022
Analog Design Journal Second-sourcing options for small-package amplifiers 26 Mar 2018

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