UMW TSV6291AICT

Overview

TSV6291AICT from STMicroelectronics is a single-channel micropower CMOS operational amplifier optimized for precision, low-voltage, rail-to-rail input/output operation in battery-powered systems. It delivers 1.3 MHz gain bandwidth product, 800 µV max input offset voltage (A-grade), 29 µA typical supply current, and operates from 1.5 V to 5.5 V. It is specified for -40 °C to +125 °C and housed in SC70-5 package - ideal for medical sensor front-ends and portable instrumentation.

For engineers reviewing the TSV6291AICT datasheet, TSV6291AICT pinout, TSV6291AICT application, or TSV6291AICT equivalent, key selection criteria include its A-grade offset voltage tolerance, rail-to-rail I/O swing at sub-2 V supply, stability in gain ≥4 configurations, and ESD robustness (4 kV HBM) - all critical for high-accuracy, ultra-low-power analog signal conditioning.

Technical Context

The TSV6291AICT uses complementary PMOS/NMOS input stages enabling true rail-to-rail input common-mode range (V_CC– − 0.1 V to V_CC+ + 0.1 V) without phase reversal. Its internal compensation ensures stability only for closed-loop gains ≥4 (non-inverting) or |G| ≥ 3 (inverting), with 60° phase margin at 100 pF load.

It features 1 pA typical input bias current, 74 dB min CMRR at 1.8 V, and 0.5 V/µs slew rate at 5 V supply - enabling accurate amplification of microvolt-level sensor signals while maintaining fast settling in low-noise, low-distortion (0.15% THD) active filtering stages.

Key Specifications

Pinout & Package

TSV6291AICT is supplied in SC70-5 (SOT323-5) package - a 1.8 mm × 2.0 mm × 0.9 mm surface-mount micropackage with 0.65 mm lead pitch, optimized for space-constrained portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSV6291ICT, the TSV6291AICT provides 5× tighter offset voltage control for high-resolution measurements; versus MCP6001T-I/OT, it offers higher bandwidth and lower noise at the cost of requiring minimum gain ≥4 - making it superior for precision active filtering but less flexible for unity-gain buffering.

Availability

TSV6291AICT is available at Aetrix Electronics and suitable for medical sensor interfaces, portable gas detectors, wearable health monitors, and industrial battery management units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSV6291AICT 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The TSV629x series belongs to ST's precision micropower op-amp product line, engineered specifically for ultra-low-power, high-accuracy signal conditioning in battery-operated and space-constrained applications - emphasizing rail-to-rail performance, A-grade offset, and robust ESD tolerance.

FAQ

Is TSV6291AICT unity-gain stable?

No. The TSV6291AICT is not unity-gain stable and requires a minimum closed-loop gain of 4 (non-inverting) or |G| ≥ 3 (inverting) to ensure phase margin ≥60°. For unity-gain applications, ST recommends the TSV620 or TSV630 families, which are explicitly designed for G = 1 stability with lower GBP but broader gain flexibility.

What is the maximum capacitive load the TSV6291AICT can drive reliably?

The TSV6291AICT is characterized for stability with up to 100 pF capacitive load when configured with gain ≥4 and resistive load ≥100 kΩ. Driving larger capacitive loads (>200 pF) or low-impedance loads (<5 kΩ) may cause peaking or oscillation; ST recommends adding a small series resistor (e.g., 10–50 Ω) between output and capacitive load to isolate the amplifier.

Does TSV6291AICT have a shutdown pin?

No. The TSV6291AICT is the single-channel, non-shutdown variant. Only the TSV6290 and TSV6290A versions include a dedicated SHDN pin for power-down mode (ICC < 1.5 µA). The TSV6291AICT lacks this pin and remains continuously active when powered - appropriate for always-on sensing applications where shutdown sequencing is unnecessary.

How does the rail-to-rail input stage affect common-mode rejection at supply rails?

The complementary PMOS/NMOS input stage causes slight degradation in CMRR (by ~2–4 dB) and increased V_IO drift near the transition region (~V_CC+ − 0.7 V), as documented in Figures 18–19. However, CMRR remains ≥51 dB across the full common-mode range (V_CC– − 0.1 V to V_CC+ + 0.1 V), and the device guarantees no phase reversal - ensuring reliable operation even with inputs at the rails.