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 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,

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 than can measure voltage

drops across shunt resistors over a wide commonmode

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.