GBP | USD

INA240 Current-Sense Amplifiers

Texas Instruments offers the INA240 high/low side, bi-directional, zero-drift, current-sense amp with enhanced pulse width modulation (PWM) rejection

Image of Texas Instruments' INA240 Current-Sense AmplifiersTexas Instruments' INA240 are voltage-output, current-sense amplifiers with enhanced PWM rejection that can sense drops across shunt resistors over a wide common-mode voltage range from -4 V to 80 V, independent of the supply voltage. The negative common-mode voltage allows the device to operate below ground, accommodating the flyback period of typical solenoid applications. Enhanced PWM rejection provides high levels of suppression for large common-mode transients (Δv/Δt) in systems that use PWM signals (such as motor drives and solenoid control systems). This feature allows for accurate current measurements without large transients and associated recovery ripple on the output voltage.

These devices operate from a single 2.7 V to 5.5 V power supply, drawing a maximum of 2.4 mA of supply current. Four fixed gains are available: 20 V/V, 50 V/V, 100 V/V, and 200 V/V. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10 mV full-scale. All versions are specified over the extended operating temperature range (-40°C to +125°C), and are offered in an 8-pin TSSOP package.

Features
  • Enhanced PWM rejection
  • Excellent CMRR:
    • 132 dB DC CMRR
    • 93 dB AC CMRR at 50 kHz
  • Wide common-mode range: -4 V to 80 V
  • Accuracy:
    • Gain:
      • Gain error: 0.20% (max)
      • Gain drift: 2.5 ppm/°C (max)
  • Offset:
    • Offset voltage: ±25 µV (max)
    • Offset drift: 250 nV/°C (max)
  • Available gains:
    • INA240A1: 20 V/V
    • INA240A2: 50 V/V
    • INA240A3: 100 V/V
    • INA240A4: 200 V/V
  • Quiescent current: 2.4 mA (max)
Applications
  • Motor controls
  • Solenoid and valve controls
  • Power management
  • Actuator controls
  • Pressure regulators
  • Telecom equipment

INA240 Current-Sense Amplifiers

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC CURR SENSE 1 CIRCUIT 8TSSOPINA240A1PWRIC CURR SENSE 1 CIRCUIT 8TSSOP0View Details
IC CURR SENSE 1 CIRCUIT 8TSSOPINA240A2PWRIC CURR SENSE 1 CIRCUIT 8TSSOP0View Details
IC CURR SENSE 1 CIRCUIT 8TSSOPINA240A3PWRIC CURR SENSE 1 CIRCUIT 8TSSOP2946 - ImmediateView Details
IC CURR SENSE 1 CIRCUIT 8TSSOPINA240A4PWRIC CURR SENSE 1 CIRCUIT 8TSSOP10001 - Factory StockView Details

Evaluation Board

ImageManufacturer Part NumberDescriptionPackagingPart StatusChannels per ICAvailable QuantityView Details
EVAL BOARD FOR INA240INA240EVMEVAL BOARD FOR INA240BulkActive1 - Single62 - Immediate
32 - Factory Stock
View Details
Published: 2017-07-06