Description：

The TPA133 is a current-sense amplifier with a very wideinput common-mode voltage range from −4 V to 95 V witha small-signal bandwidth of 1 MHz. The enhanced PWMrejection allows the TPA133 to accommodate the solenoidand motor applications. The device features high-precisionaccuracy specifications of Vos and the gain error, whichmakes it ideal for the small signal conditioning interfacingwith a high-accuracy ADC.Fixed gains are optional: 10 V/V, 20 V/V, 50 V/V, 100 V/V,200 V/V, and 500 V/V. The device offers breakthroughperformance throughout the temperature range of −40°Cto +125°C. The device is offered SOT23-8 and MSOP8packages.Many systems, including motors and solenoids, employPWM signals for modulation or control purposes. However,these PWM signals generate fast common-mode voltagetransitions that oscillate between high voltage and groundpotential. This can pose a challenge for the currentmeasurement circuitry, as it may result in undesirableoutput voltage fluctuations. To address this issue, thedevice incorporates an advanced PWM rejection feature.This feature minimizes the impact of common-modevoltage transitions and ensures stable and reliable outputvoltage.

Features：

• Enhanced PWM Rejection

• Wide Common-Mode Voltage

– Operational Voltage: −4 V to 95 V

– Survival Voltage: −8 V to 100 V

• Supply Voltage: 3.0 V to 5.5 V

• Excellent CMRR

– 150-dB DC CMRR

– 115-dB AC CMRR at 50 kHz

• Accuracy and Zero-Drift Performance

– 120-μV Voltage Offset (Max, −40°C to 125°C)

– 0.3% Gain Error (Max, −40°C to 125°C)

• Bandwidth: 1 MHz (For A0, A1, A2, A3, A4 Version)

• Excellent Start-up and Power-off Response

• Gain Options for Voltage Output

– TPA133A0: 10 V/V

– TPA133A1: 20 V/V

– TPA133A2: 50 V/V

– TPA133A3: 100 V/V

– TPA133A4: 200 V/V

– TPA133A5: 500 V/V

• −40°C to 125°C Operation Range

Applications：

• Current Sensing (High-Side and Low-Side)

• Solenoid and Valve Control

• Power Management