STMicroelectronics TSB572IQ2T

Overview

TSB572IQ2T from STMicroelectronics is a dual rail-to-rail input/output operational amplifier designed for high-voltage industrial and automotive signal conditioning. It operates from 4 V to 36 V, delivers 2.5 MHz gain bandwidth at 380 µA per channel, supports –40 °C to 125 °C operation, and features 30 nA max input bias current and 4 kV HBM ESD rating - enabling use in low-side current sensing and 12 V/24 V automotive power supply monitoring.

For engineers reviewing the TSB572IQ2T datasheet, TSB572IQ2T pinout, TSB572IQ2T application, or TSB572IQ2T equivalent, key selection criteria include its extended supply range, rail-to-rail I/O performance across temperature, low quiescent current stability at 36 V, and robust capacitive load drive capability up to 500 pF without external compensation.

Technical Context

The TSB572IQ2T employs a BiCMOS process with 40 V tolerance, enabling stable operation across wide supply rails while maintaining rail-to-rail input common-mode range (VCC– – 0.1 V to VCC+ + 0.1 V) and output swing within 60 mV of rails at 36 V. Its internal architecture avoids phase reversal and integrates ESD protection diodes rated to 4 kV HBM on all inputs.

It achieves 2.5 MHz GBP with 0.88 V/µs negative slew rate at 36 V, maintains ≥45° phase margin with 100 pF capacitive load, and exhibits <0.001% THD+N at 1 kHz - confirming suitability for precision active filtering and audio pre-amplification where DC accuracy and dynamic linearity are jointly critical.

Key Specifications

Pinout & Package

TSB572IQ2T is housed in a DFN8 (3 × 3 mm) package with wettable flanks, optimized for automated optical inspection and high-density PCB layouts. The exposed pad (Pin 9) is electrically connected to VCC– and must be soldered to a thermal pad for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual rail-to-rail op-amp applications.

Compared with TSB712IST and LM2904QDRQ1, the TSB572IQ2T uniquely balances 2.5 MHz bandwidth, rail-to-rail I/O, 380 µA power, and automotive qualification - making it optimal for real-time control loops where speed, supply flexibility, and ruggedness are co-constrained.

Availability

TSB572IQ2T is available at Aetrix Electronics and suitable for automotive battery management, industrial power supply feedback, and motor control current sensing requiring stable component supply across extended temperature and voltage ranges.

Supply support for TSB572IQ2T 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 vertical manufacturing and AEC-Q100 qualification expertise.

The TSB57x series targets high-voltage analog signal conditioning in harsh environments, emphasizing wide supply range, rail-to-rail performance, and robustness - specifically engineered for automotive and industrial systems where reliability and design simplicity are paramount.

FAQ

What is the maximum capacitive load the TSB572IQ2T can drive without instability?

The TSB572IQ2T maintains ≥45° phase margin with up to 500 pF capacitive load when configured as a unity-gain buffer with 10 kΩ series resistor at the output, per Figure 25 in DS11248 Rev 9. Driving >500 pF requires external compensation or a small series resistor (≥10 Ω) to isolate the load capacitance from the op-amp output node.

Does the TSB572IQ2T support true rail-to-rail input when powered from a single 5 V supply?

Yes - the input common-mode range extends from (VCC–) – 0.1 V to (VCC+) + 0.1 V. At 5 V single supply (VCC+ = 5 V, VCC– = 0 V), inputs accept signals from –0.1 V to +5.1 V, enabling direct interface with sensors that swing slightly below ground or above VCC, such as piezoelectric transducers.

How does the 380 µA supply current scale across the 4 V to 36 V operating range?

Per Figure 3 in DS11248 Rev 9, ICC increases linearly from ~340 µA at 4 V to ~470 µA at 36 V (25 °C). At 125 °C, current rises to 550 µA max at 36 V. This predictable scaling allows accurate power budgeting in wide-input-range designs without derating assumptions.

Is the exposed pad on the DFN8 package electrically connected, and how should it be handled?

Yes - the exposed pad (Pin 9) is internally connected to VCC– and must be soldered to a PCB thermal pad tied to the system ground plane. Leaving it floating degrades thermal resistance by >50% and risks ESD susceptibility; connecting it to any net other than VCC– may cause latch-up or parametric shift.