TPA132(3PEAK)

The TPA132 is a current-sense amplifier with a very wide input common-mode voltage range from −4 V to 80 V with a small-signal bandwidth of 1 MHz. The enhanced PWM rejection allows the TPA132 to accommodate the solenoids and motors applications. The device features high precision accuracy specifications of Vos and the gain error, which makes it ideal for the small signal conditioning interfacing with a high accuracy ADC.

Fixed gains are optional: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The device offers breakthrough performance throughout the temperature range of −40°C to +125°C. The device is offered SOP8 and TSSOP8 packages.

Many systems, including motors and solenoids, employ PWM signals for modulation or control purposes. However, these PWM signals generate fast common-mode voltage transitions that oscillate between high voltage and ground potential. This can pose a challenge for the current measurement circuitry, as it may result in undesirable output voltage fluctuations. To address this issue, the device incorporates an advanced PWM rejection feature. This feature minimizes the impact of common-mode voltage transitions and ensures stable and reliable output voltage.

Features

• Enhanced PWM Rejection

• Wide Common-Mode Voltage– Operational Voltage: −4 V to 80 V– Survival Voltage: −10 V to 85 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– 100-μV Voltage Offset (Max, −40°C to 125°C)– 0.3% Gain Error (Max, −40°C to 125°C)

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

• Slew Rate: 11.5 V/µs (For A1, A2, A3, A4 Version)

• Excellent Start-up and Power-off Response

• Gain Options for Voltage Output– TPA132A1: 20 V/V– TPA132A2: 50 V/V– TPA132A3: 100 V/V– TPA132A4: 200 V/V– TPA132A5: 500 V/V

• −40°C to 125°C Operation Range

Applications