STMicroelectronics TSC2010, TSC2011 and TSC2012 current-sense amplifiers

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STMicroelectronics has introduced three precision high-voltage bidirectional current-sense amplifiers that provide the convenience of a shutdown pin to maximise energy savings.

The TSC2010, TSC2011 and TSC2012 amplifiers allow designers to minimise power dissipation by leveraging their precision characteristics to select low sense-resistor values. The offset voltage is within ±200 µV at 25°C, with less than 5 µV/°C drift, and gain accuracy is within 0.3%, enabling the devices to detect a voltage drop as low as 10 mV full-scale to provide consistent and trusted measurements.

The gain variety — 20 V/V for the TSC2010, 60 V/V for the TSC2011 and 100 V/V for the TSC2012 — gives the flexibility to build precision current measurement, overcurrent protection, current monitoring and current-feedback circuits for many different industrial and automotive systems. Uses include data acquisition, motor control, solenoid control, instrumentation, test and measurement, and process control.

With their bidirectional capability, the three amplifiers help designers trim their bill of materials by allowing a single sensing circuit to measure current flowing in forward and reverse directions. The devices are also suitable for high-side and low-side connection, enabling the same part number to be used in both configurations for easier inventory management.

All the devices have a wide supply voltage range, from 2.7 to 5.5 V, adding further to their flexibility. Their wide input-voltage tolerance allows sensing over a range of common-mode voltages from -20 to +70 V at any supply voltage. With high gain-bandwidth product and fast slew rate — 820 kHz and 7.5 V/µs in the TSC2010 — they enable fast response.

The devices feature an integrated EMI filter and 2 kV HBM (Human Body Model) ESD tolerance, enabling robust performance, and operate over the industrial temperature range of -40°C to +125°C.

For more information: www.st.com/current-sense-amplifiers.