STMicroelectronics TSU102IQ2T

Overview

TSU102IQ2T from STMicroelectronics is a dual-channel nanopower rail-to-rail input/output operational amplifier optimized for ultra-low-energy sensor signal conditioning. It delivers 580 nA typical supply current per channel at 1.8 V, 8 kHz gain bandwidth, and 2 pA max input bias current across –40 °C to 85 °C, enabling direct interfacing with high-impedance electrochemical sensors and PIR detectors in coin-cell–powered metering systems.

For engineers reviewing the TSU102IQ2T datasheet, TSU102IQ2T pinout, TSU102IQ2T application, or TSU102IQ2T equivalent, key selection criteria include sub-microamp quiescent current, rail-to-rail I/O swing at 1.5 V minimum supply, input offset voltage drift ≤5 µV/°C, and guaranteed operation in industrial temperature range - all critical for battery lifetime estimation and low-voltage precision sensing.

Technical Context

The TSU102IQ2T employs complementary PMOS/NMOS input stages to achieve rail-to-rail common-mode input range (VCC− − 0.1 V to VCC+ + 0.1 V) without phase reversal, supporting accurate DC-coupled amplification of signals near supply rails. Its 8 kHz GBP and 3 V/ms slew rate are optimized for low-frequency sensor outputs - not high-speed signal chains.

It features unity-gain stability with capacitive load tolerance up to 200 pF (with recommended series RISO), and maintains CMRR ≥65 dB over full temperature range. Input noise is 265 nV/√Hz at 100 Hz and 8.1 µVpp integrated over 0.1–10 Hz, making it suitable for microvolt-level transducer outputs.

Key Specifications

Pinout & Package

TSU102IQ2T is housed in a MiniSO8 (SOIC-8) package with exposed pad, measuring 4.9 mm × 6.0 mm × 1.75 mm. This thermally enhanced package supports reliable operation at 85 °C ambient with R_thJA = 190 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nanopower op amp applications.

Compared with TSU112IDT and LTC1540CMS8#TRPBF, TSU102IQ2T uniquely balances sub-µA consumption, rail-to-rail operation, and industrial temperature stability - making it the optimal choice for long-life, low-voltage, high-impedance sensor interfaces where both accuracy and energy efficiency are non-negotiable.

Availability

TSU102IQ2T is available at Aetrix Electronics and suitable for ultra-low-power sensor nodes, portable medical diagnostics, and battery-operated environmental monitors requiring stable component supply across extended product lifecycles.

Supply support for TSU102IQ2T 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 TSU10x series belongs to ST's nanopower precision op amp product line, engineered specifically for energy-constrained signal acquisition in battery-powered instrumentation and IoT edge nodes.

FAQ

What is the maximum capacitive load the TSU102IQ2T can drive without instability?

The TSU102IQ2T remains stable with up to 200 pF capacitive load when a series isolation resistor (R_ISO) of 10–100 Ω is placed between the output and the load. Figure 24 and Figure 25 in DS9507 confirm phase margin stays ≥60° across this range at 3.3 V supply. For loads >200 pF, an external R_ISO ≥1 kΩ is required to maintain unity-gain stability.

Can the TSU102IQ2T operate from a 1.2 V supply?

No. The absolute minimum supply voltage is 1.5 V per Table 2 of DS9507. At 1.2 V, internal biasing fails and the amplifier ceases to function - confirmed by Figure 2 showing supply current collapse below 1.5 V. Systems requiring sub-1.5 V operation must select alternative architectures such as zero-drift chopper amplifiers with lower V_DD specs.

Does the TSU102IQ2T support single-supply operation with ground-referenced inputs?

Yes. Its rail-to-rail input stage accepts common-mode voltages from (VCC−) − 0.1 V to (VCC+) + 0.1 V. When VCC− = 0 V (ground), inputs can range from –0.1 V to VCC+ + 0.1 V - enabling true single-supply use with AC-coupled or level-shifted sensor signals without external bias networks.

How does the input offset voltage drift affect long-term calibration in a 10-year deployment?

With ΔV_os/ΔT ≤5 µV/°C and long-term drift of 1.1 µV/√month at 5 V, total drift over 10 years at 25 °C ambient is ≈40 µV - well within the ±3.4 mV initial spec. In worst-case thermal cycling (–40 °C to 85 °C), accumulated drift remains <120 µV, preserving <0.05% gain error in 200 mV full-scale designs calibrated at factory.