INA181A1QDCKRQ1

The INA181-Q1, INA2181-Q1, and INA4181-Q1 (INAx181-Q1) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional current sense amplifiers (also known as current shunt monitors) that sense the voltage drop across a current sense resistor at common-mode voltages from -0.2V to 26V, independent of the supply voltage. The INAx181-Q1 family integrates a matched resistor gain network with four fixed-gain options: 20V/V, 50V/V, 100V/V, or 200V/V. This matched gain resistor network minimizes gain error and reduces temperature drift. These devices operate from a single 2.7V to 5.5V supply. The single-channel INA181-Q1 has a maximum supply current of 260µA; the dual-channel INA2181-Q1 has a maximum supply current of 500µA; the quad-channel INA4181-Q1 has a maximum supply current of 900µA. The INA181-Q1 is available in 6-pin SOT-23 and SC70 packages. The INA2181-Q1 comes in a 10-pin VSSOP package. The INA4181-Q1 comes in a 20-pin TSSOP package. All device options are specified over an operating temperature range of -40°C to 125°C.

Applications

• Motor control
• Battery monitoring and balancing
• Power management
• Lighting control

Key features

• AEC-Q100 qualified for automotive applications
• Temperature Grade 1: -40°C ≤ TA ≤ 125°C
• HBM ESD Classification Level 2
• CDM ESD Classification Level C6
• Functional Safety-Capable
• Documentation available to aid functional safety system design
• Common-mode range (VCM): -0.2V to 26V
• High bandwidth: 350kHz (A1 device)
• Offset voltage:
• Maximum ±150µV at VCM = 0V
• Maximum ±500µV at VCM = 12V
• Output slew rate: 2V/µs
• Bidirectional current sensing capability
• Accuracy:
• Maximum ±1% gain error
• Maximum 1µV/°C offset drift
• Gain options:
• 20V/V (A1 device)
• 50V/V (A2 device)
• 100V/V (A3 device)
• 200V/V (A4 device)
• Quiescent current: 260µA maximum for INA181-Q1