STMicroelectronics TSV712IST

Overview

TSV712IST from STMicroelectronics is a dual-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, 14 µA supply current per channel at 5 V, and 150 kHz gain bandwidth product, operating from 1.5 V to 5.5 V across –40 °C to +125 °C - enabling precision sensor front-ends in portable medical devices.

For engineers reviewing the TSV712IST datasheet, TSV712IST pinout, TSV712IST application, or TSV712IST equivalent, key selection criteria include micropower operation under 15 µA/channel, guaranteed rail-to-rail I/O performance down to 1.5 V, EMI-hardened architecture (EMIRR up to 63 dB at 2.4 GHz), and industrial-temperature-grade accuracy without calibration.

Technical Context

The TSV712IST implements a proprietary CMOS input stage with 1 pA typical input bias current and internal differential voltage limiting (±0.5 V clamp), enabling robust operation with high-impedance sources. Its rail-to-rail input extends from V_CC– – 0.1 V to V_CC+ + 0.1 V, while rail-to-rail output drives within 40 mV of V_CC+ and 75 mV of V_CC– under 10 kΩ load.

It features a 150 kHz gain bandwidth product with 45° phase margin and 19 dB gain margin, supporting stable unity-gain configurations. Initialization logic activates on power-up, requiring up to 50 ms at 125 °C to settle V_io and I_CC to specified values - critical for low-duty-cycle sensing nodes.

Key Specifications

Pinout & Package

TSV712IST is housed in MiniSO-8 package (3.0 mm × 4.9 mm, 1.27 mm pitch), featuring exposed thermal pad for enhanced power dissipation in space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSV712IST, TSV732IST trades micropower for bandwidth, while MCP6002-E/SN sacrifices accuracy and temperature range for ultra-low quiescent current - making TSV712IST uniquely balanced for long-life, high-precision, wide-temperature analog sensing.

Availability

TSV712IST is available at Aetrix Electronics and suitable for portable medical devices, industrial 4–20 mA transmitters, and automotive cabin air quality monitors requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for TSV712IST 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, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TSV71x series was developed specifically for ultra-low-power, high-accuracy signal conditioning in battery-operated and harsh-environment applications - emphasizing offset stability, EMI resilience, and rail-to-rail functionality at micropower levels.

FAQ

What is the maximum capacitive load the TSV712IST can drive without instability?

The TSV712IST is stable with up to 100 pF capacitive load when configured in unity-gain buffer mode, as verified by phase margin ≥45° and gain margin ≥19 dB in the datasheet's Bode plots (Figures 11–12). For loads exceeding 100 pF, a series resistor (≥100 Ω) must be added between output and capacitance to maintain stability - critical for driving ADC input capacitors or long PCB traces.

Does the TSV712IST require external input protection for use with high-impedance sensors?

No external input protection is required: the TSV712IST integrates internal differential voltage clamping (±0.5 V) and withstands 4 kV HBM ESD, making it suitable for direct connection to high-impedance sources like thermopiles, pH electrodes, or piezoresistive elements. However, a 10 nF ceramic decoupling capacitor must be placed within 2 mm of Pins 4 and 5 per the layout guidelines to ensure EMI immunity.

How does the initialization time affect system power cycling behavior?

Upon power-up, the TSV712IST enters an initialization phase lasting up to 50 ms at 125 °C, during which supply current and input offset voltage are outside spec. This mandates that microcontrollers delay analog measurements until after t_init expires - especially in duty-cycled systems. The datasheet provides measured t_init vs. V_CC and temperature (Table 6) to enable accurate wake-up timing budgets.

Can the TSV712IST operate reliably from a 1.5 V alkaline cell throughout its discharge curve?

Yes - the TSV712IST is fully specified from 1.5 V to 5.5 V, with tested performance at 1.5 V (see Figure 8–10 and Section 4.1). At 1.5 V, it maintains rail-to-rail input/output swing, 200 µV max V_io, and 14 µA supply current, enabling uninterrupted operation from fresh to end-of-life (~0.9 V) alkaline cells when paired with appropriate brown-out detection.