STMicroelectronics TS27L2IDT

Overview

TS27L2IDT from STMicroelectronics is a precision, very low power CMOS dual operational amplifier operating from 3 V to 16 V single supply or ±1.5 V to ±8 V dual supply, featuring 10 µA per amplifier quiescent current, 0.25 mV max input offset voltage (TS27L2I grade), rail-to-ground output swing, and stable operation with capacitive loads up to 100 pF - used in battery-powered sensor signal conditioning and portable medical instrumentation.

For engineers reviewing the TS27L2IDT datasheet, TS27L2IDT pinout, TS27L2IDT application, or TS27L2IDT equivalent, key selection criteria include guaranteed low input bias current (<1 pA typ.), high common-mode rejection (80 dB min), low noise (68 nV/√Hz), and extended industrial temperature range (–40°C to +125°C) in SO-8 package.

Technical Context

The TS27L2IDT employs ST's silicon gate CMOS process to achieve ultra-low input bias current and minimal drift over temperature, distinguishing it from JFET-input op-amps. Its two-stage internal architecture delivers stable unity-gain performance with phase margin ≥45° into 100 pF loads without external compensation.

It supports rail-to-ground output swing on the low side and reaches within 1.2 V of V_CC on the high side, enabling wide dynamic range in single-supply configurations. Input common-mode range extends from ground to V_CC – 1.5 V, allowing direct interfacing with low-voltage sensors and microcontroller ADC references.

Key Specifications

Pinout & Package

TS27L2IDT is supplied in an 8-pin SO (Small Outline) plastic micropackage (SO-8), compliant with JEDEC MS-012, with gull-wing leads and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2462IDR and OPA2333AIDR, TS27L2IDT offers the lowest power consumption and proven robustness in high-impedance, DC-critical applications - making it optimal for cost-sensitive, ultra-low-power industrial and medical sensors where bandwidth ≤10 kHz suffices.

Availability

TS27L2IDT is available at Aetrix Electronics and suitable for portable medical devices, battery-powered environmental sensors, industrial temperature transmitters, and low-voltage PLC analog input modules requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TS27L2IDT 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 microcontrollers, analog ICs, power management devices, and MEMS sensors for industrial, automotive, and consumer markets.

The TS27L2 series belongs to ST's precision analog portfolio, developed specifically for ultra-low-power, high-impedance signal conditioning in energy-constrained and thermally demanding applications - emphasizing longevity, stability, and ease of use without external compensation.

FAQ

What is the maximum capacitive load the TS27L2IDT can drive without oscillation?

The TS27L2IDT maintains ≥45° phase margin and stable unity-gain operation with up to 100 pF capacitive load, as verified in Figure 8 of the official datasheet. This eliminates the need for series output resistors when driving typical SAR ADC input capacitances (e.g., 10–30 pF) or long PCB traces, simplifying layout and preserving signal fidelity.

Does TS27L2IDT support true rail-to-rail input common-mode range?

No - the input common-mode voltage range is specified as 0 V to V_CC – 1.5 V. While the output swings to ground (rail-to-ground), the inputs cannot accept signals within 1.5 V of V_CC. This design trades full rail-to-rail input for lower input bias current and improved PSRR, making it ideal for ground-referenced sensor interfaces rather than high-side sensing.

Can TS27L2IDT operate from a 3.3 V supply while maintaining specified offset and drive capability?

Yes - the device is fully characterized from 3 V to 16 V. At V_CC = 3.3 V, input offset voltage remains ≤0.25 mV (I-grade), output can sink 45 mA and source 60 mA, and common-mode rejection stays ≥80 dB. This makes it suitable for modern low-voltage IoT sensor nodes without performance compromise.

How does the input bias current of TS27L2IDT compare to JFET-input op-amps at elevated temperature?

Unlike JFET-input amplifiers whose bias current doubles every ~10°C, TS27L2IDT's CMOS input exhibits <10× increase from 25°C to 125°C - remaining below 100 pA across its full operating range. This stability ensures consistent gain accuracy in high-temperature industrial environments where JFET devices would introduce significant drift-induced errors.