STMicroelectronics TSV731ICT

Overview

TSV731ICT from STMicroelectronics is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for ultra-low-power, high-accuracy signal conditioning in battery-powered systems. It delivers 200 µV max input offset voltage, 60 µA supply current at 5 V, 900 kHz gain bandwidth, 1.5–5.5 V supply range, and operates across –40 °C to +125 °C - enabling precision sensor interfacing in portable medical devices.

For engineers reviewing the TSV731ICT datasheet, TSV731ICT pinout, TSV731ICT application, or TSV731ICT equivalent, key selection criteria include micropower operation under 1.8 V, EMI-hardened performance at 400–2400 MHz, rail-to-rail swing with <80 mV output saturation, and guaranteed accuracy over automotive-grade temperature extremes.

Technical Context

The TSV731ICT employs ST's proprietary 5 V CMOS process to achieve ultra-low input bias current (1 pA typ.) and low offset drift (4.5 µV/°C), making it suitable for high-impedance source amplification without calibration. Its internal architecture supports stable unity-gain operation with 48° phase margin and 15 dB gain margin at 5 V.

Rail-to-rail input extends from V_CC– – 0.1 V to V_CC+ + 0.1 V; rail-to-rail output drives within 40 mV of V_CC+ and 75 mV of V_CC– under 10 kΩ load. EMI rejection ratio reaches 66 dB at 2.4 GHz, confirming hardened design for noisy portable environments.

Key Specifications

Pinout & Package

TSV731ICT is housed in SC70-5 (SOT-353) package - a 1.25 mm × 1.65 mm, 0.65 mm pitch surface-mount outline optimized for space-constrained portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSV731ICT, TSV711ICT trades bandwidth for greater energy efficiency in static sensing, while MCP6V81T-E/OT offers similar micropower operation but with higher thermal drift - making TSV731ICT the optimal choice for high-accuracy, wide-temperature, RF-noisy portable instrumentation.

Availability

TSV731ICT is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT endpoints, and industrial sensor transmitters requiring stable component supply with extended temperature qualification and EMI resilience.

Supply support for TSV731ICT 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 analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The TSV73x series was developed to address demand for high-accuracy, micropower op-amps in space- and energy-constrained applications - particularly sensor signal chains in portable and harsh-environment electronics.

FAQ

What is the maximum capacitive load the TSV731ICT can drive stably?

The TSV731ICT maintains stability with up to 100 pF capacitive load when configured as a unity-gain follower, as verified by phase margin ≥48° and gain margin ≥15 dB in the datasheet's Bode plots. For loads exceeding 100 pF, a series resistor (≥100 Ω) between output and capacitance is recommended to preserve stability without degrading DC accuracy.

Does the TSV731ICT support true single-supply operation below 1.8 V?

Yes - the TSV731ICT is fully specified down to 1.5 V supply, with functional operation confirmed at 1.5 V in characterization curves (Figure 2). At this voltage, supply current remains ~45 µA, GBP drops to ~700 kHz, and rail-to-rail input/output behavior is preserved, enabling use in deep-discharge battery scenarios.

How does the 4 kV HBM ESD rating impact PCB layout practices?

The 4 kV HBM rating reflects robust internal protection diodes, but does not eliminate need for external ESD safeguards. Layout best practices remain essential: keep input traces short, avoid vias near pins 2 and 5, use ground guard rings around sensitive inputs, and place 100 nF ceramic decoupling capacitor within 2 mm of pins 3 and 4 to maintain transient immunity during system-level ESD events.

Can the TSV731ICT be used in a precision reference buffer configuration?

Yes - its 200 µV max offset, 4.5 µV/°C drift, and 1 pA input bias current make it suitable for buffering voltage references (e.g., REF3025) in high-resolution data acquisition systems. However, ensure the reference output impedance is <10 Ω to avoid gain error; for higher-impedance references, add a 10 Ω series resistor to isolate capacitive loading effects.