STMicroelectronics TSC2020IYDT

Overview

TSC2020IYDT from STMicroelectronics is a precision bidirectional current sense amplifier with fixed 20 V/V gain, -4 to +100 V common-mode input range, ±150 µV max offset voltage, and AEC-Q100 qualification for automotive use. It enables high-accuracy shunt-based current measurement in high-side or low-side configurations within 48 V battery systems, motor control feedback loops, and battery management units.

For engineers reviewing the TSC2020IYDT datasheet, TSC2020IYDT pinout, TSC2020IYDT application, or TSC2020IYDT equivalent, this device supports design of robust overcurrent protection, real-time current monitoring, and closed-loop power stage control under extreme common-mode transients - especially where PWM rejection, thermal stability, and wide supply (2.7–5.5 V) operation are critical.

Technical Context

The TSC2020IYDT employs a zero-drift topology with thin-film resistors to achieve 100 dB min CMRR and 0.3% max gain error across -40 to +125 °C. Its integrated PWM enhancer detects fast common-mode edges (e.g., motor gate drive transitions) and suppresses output disturbance without external filtering.

It operates with dual reference inputs (VREF1/VREF2) enabling flexible output common-mode setting for unidirectional or bidirectional sensing, and features rail-to-rail output swing with 1.7–2.4 mA supply current across its full 2.7–5.5 V supply range.

Key Specifications

Pinout & Package

Supplied in SO8 package (ECOPACK2, RoHS-compliant), with exposed pad for thermal enhancement. Pin mapping validated per DS14393 Rev 7 (p.2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current sense amplifier applications.

Compared with INA240A1QDRQ1, TSC2020IYDT delivers superior PWM transient immunity and lower offset drift; compared with TSC2021IYDT, it provides lower gain for wider dynamic range in high-current applications - making it optimal for 48 V systems requiring both accuracy and robustness.

Availability

TSC2020IYDT is available at Aetrix Electronics and suitable for automotive battery management, 48 V power distribution, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for TSC2020IYDT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in automotive, industrial, and power management ICs with broad analog portfolio and automotive-grade manufacturing.

The TSC202x series was designed specifically for high-accuracy, high-CMRR current sensing in next-generation 48 V automotive and industrial systems - emphasizing PWM resilience, wide common-mode tolerance, and AEC-Q100 reliability.

FAQ

What is the maximum shunt voltage the TSC2020IYDT can accurately measure?

The TSC2020IYDT supports a maximum differential input (Vsense) of 123.8 mV at 2.7 V supply and 238.5 mV at 5 V supply while maintaining ≤0.3% gain error. This corresponds to full-scale output of 2.48 V and 4.77 V respectively - enabling precise measurement across common shunt values (e.g., 100 µΩ at 124 A or 500 µΩ at 25 A).

How does the PWM enhancer function without external components?

The PWM enhancer is an internal circuit that monitors dV/dt on the common-mode input and activates dynamic compensation within the amplifier core. It reduces output overshoot by >90% during 48 V/100 ns transients - verified in Figures 39–42 of DS14393 - eliminating need for external snubbers or RC filters in motor control designs.

Can TSC2020IYDT operate with only one reference pin connected?

Yes - connecting VREF1 to VCC and VREF2 to GND sets output common-mode to VCC/2 for bidirectional sensing; tying both to GND configures unidirectional mode with 0–VCC output swing. The device guarantees 0.2% accuracy in either configuration, as confirmed in Table 4 (Acc, RT).

Is thermal performance affected by the SO8 package in high-power PCB layouts?

SO8 R_THJA is 125 °C/W (typical). At 2.4 mA supply current and 5 V VCC, dissipation is ~12 mW - resulting in <1.5 °C junction rise above ambient. For sustained high-temp operation, ST recommends soldering the exposed pad to a thermal plane per AN5221 guidelines to maintain <125 °C junction under worst-case conditions.