1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: −40°C to 125°C, TA

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Enhanced PWM rejection optimized for systems

subject to switching common-mode voltages

– Supports switching frequencies up to 125kHz

• Wide common-mode voltage:

– Operational voltage: −5V to 110V

– Survival voltage: −20V to 120V

• Bidirectional operation

• High small signal bandwidth: 1.1MHz (at all gains)

• Slew rate: 8V/μs

• Step response settling time to 1: 1μs

• Excellent CMRR

– 166dB DC-CMRR

– 104dB AC-CMRR at 100kHz

– 89dB AC-CMRR at 1MHz

• Accuracy:

– Gain error (maximum)

• Version A: ±0.01, ±1ppm/°C drift

• Version B: ±0.1, ±5ppm/°C drift

– Offset voltage (maximum)

• Version A: ±10μV, ±0.1μV/°C drift

• Version B: ±150μV, ±0.5μV/°C drift

• Available gains:

– INA241A1-Q1 : 10V/V

– INA241A2-Q1 : 20V/V

– INA241A3-Q1 : 50V/V

– INA241A4-Q1 : 100V/V

– INA241A5-Q1 : 200V/V

• Package options: SOT23-8, VSSOP-8, SOIC-8,

VSSOP-10

2 Applications

• eTurbo/charger

• Electric power steering (EPS)

• Starter/generator

• Regenerative breaking

• Brake system

3 Description

The INA241x-Q1 is an ultra-precise, bidirectional

current sense amplifier that can measure voltage

drops across shunt resistors over a wide commonmode

range from –5V to 110V, independent of

the supply voltage. The high-precision current

measurement is achieved through a combination of

low offset voltage (±10μV, maximum), small gain error

(±0.01, maximum) and a high DC CMRR (typical

166dB). The INA241x-Q1 is designed for high voltage,

bidirectional measurements in switching systems

that see large common-mode voltage transients at

the device inputs. The enhanced PWM rejection

circuitry inside the INA241x-Q1 provides minimal

signal disturbance at the output due to the commonmode

voltage transitions at the input.

The INA241x-Q1 operates from a single 2.7V to

20V supply, drawing 2.5mA of supply current. The

INA241x-Q1 is available in five gain options: 10V/V,

20V/V, 50V/V, 100V/V, and 200V/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.