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

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 and is offered
in a space-saving 8-pin SOT-23 and 8-pin VSSOP
package.