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INA241B-Q1

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AEC-Q100, -4-V to 110-V bidirectional high-precision current sense amp with enhanced PWM rejection

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Data sheet

INA241B-Q1

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) (V) 0.00015 Input offset drift (±) (typ) (V/°C) 0.0000005 Voltage gain (V/V) 10, 20, 100, 200, 500 CMRR (min) (dB) 120 Bandwidth (MHz) 1 Supply voltage (max) (V) 20 Supply voltage (min) (V) 2.7 Iq (max) (mA) 3.2 Number of channels 1 Features Bi-directional, Enhanced PWM Rejection, High precision, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable 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) (V) 0.00015 Input offset drift (±) (typ) (V/°C) 0.0000005 Voltage gain (V/V) 10, 20, 100, 200, 500 CMRR (min) (dB) 120 Bandwidth (MHz) 1 Supply voltage (max) (V) 20 Supply voltage (min) (V) 2.7 Iq (max) (mA) 3.2 Number of channels 1 Features Bi-directional, Enhanced PWM Rejection, High precision, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: −40°C to +125°C, TA
  • Functional Safety-Capable
  • 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-Q1 : 10 V/V
    • INA241A2-Q1 : 20 V/V
    • INA241A3-Q1 : 50 V/V
    • INA241A4-Q1 : 100 V/V
    • INA241A5-Q1 : 200 V/V
  • Package options: SOT23-8, VSSOP-8, SOIC-8
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: −40°C to +125°C, TA
  • Functional Safety-Capable
  • 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-Q1 : 10 V/V
    • INA241A2-Q1 : 20 V/V
    • INA241A3-Q1 : 50 V/V
    • INA241A4-Q1 : 100 V/V
    • INA241A5-Q1 : 200 V/V
  • Package options: SOT23-8, VSSOP-8, SOIC-8

The INA241x-Q1 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-Q1 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-Q1 ensures minimal signal disturbance at the output due to the common-mode voltage transitions at the input.

The INA241x-Q1 operates from a single 2.7 V to 20 V supply, drawing 2.5 mA of supply current. The INA241x-Q1 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-Q1 is specified over operating temperature range of −40°C to +125°C and is offered in a space-saving 8-pin SOT-23 and 8-pin VSSOP package.

The INA241x-Q1 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-Q1 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-Q1 ensures minimal signal disturbance at the output due to the common-mode voltage transitions at the input.

The INA241x-Q1 operates from a single 2.7 V to 20 V supply, drawing 2.5 mA of supply current. The INA241x-Q1 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-Q1 is specified over operating temperature range of −40°C to +125°C and is offered in a space-saving 8-pin SOT-23 and 8-pin VSSOP package.
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Technical documentation

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Type Title Date
* Data sheet INA241x-Q1 AEC-Q100, –5 V to 110 V, Bidirectional, Ultra-Precise Current Sense Amplifier With Enhanced PWM Rejection datasheet PDF | HTML 24 Feb 2023
Functional safety information INA241x-Q1 and INA296x-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 09 Feb 2023
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
Analog Design Journal Second-sourcing options for small-package amplifiers 26 Mar 2018
Technical article System trade-offs for high- and low-side current measurements 01 Jun 2017

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