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.