STMicroelectronics TS27L4CDT

Overview

TS27L4CDT from STMicroelectronics is a very low power precision CMOS quad operational amplifier with 10 µA/op supply current, rail-to-ground output swing, unity-gain stability, and ±18 V differential input voltage rating. It operates from 3–16 V single supply and delivers 0.04 V/µs slew rate and 60–100 V/mV large-signal voltage gain in sensor signal conditioning and battery-powered instrumentation.

For engineers reviewing the TS27L4CDT datasheet, TS27L4CDT pinout, TS27L4CDT application, or TS27L4CDT equivalent, key selection criteria include ultra-low quiescent current, ground-swing output capability, capacitive-load phase margin (≥45°), and dual-temperature-grade availability (0°C to +70°C).

Technical Context

The TS27L4CDT integrates four independent CMOS op-amps on a single die using ST's silicon gate process, achieving 1 pA typical input bias current and <2 µV/°C offset drift. Its internal architecture includes a high-impedance differential input stage, second-stage gain amplification, and class-AB output stage optimized for low-power operation.

It supports single-supply operation down to 3 V with common-mode input range from 0 V to V_CC − 1.5 V and maintains stability with ≥100 pF capacitive loads without external compensation-enabled by inherent 45° phase margin at unity gain.

Key Specifications

Pinout & Package

TS27L4CDT is supplied in SO-14 (plastic micropackage), 3.9 mm × 8.7 mm body, 1.27 mm pitch, JEDEC MS-012AC compliant. Thermal resistance R_thJA = 105 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2464IDR and LP324DR, TS27L4CDT uniquely balances ultra-low power (10 µA/op), guaranteed ground-swing output, and precision DC specs (1.1 mV offset, <2 µV/°C drift) - making it irreplaceable in multi-year battery-powered sensor nodes requiring DC stability.

Availability

TS27L4CDT is available at Aetrix Electronics and suitable for portable gas detection systems, medical thermistor interfaces, industrial 4–20 mA receivers, and solar-powered data loggers requiring stable component supply across extended production lifecycles.

Supply support for TS27L4CDT 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, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The TS27L4 series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, high-DC-accuracy signal conditioning in battery-constrained and space-limited applications.

FAQ

What is the maximum capacitive load the TS27L4CDT can drive while remaining stable?

The TS27L4CDT maintains ≥45° phase margin with up to 100 pF capacitive load at unity gain, as verified in Figure 12 of the datasheet. No external compensation is required for loads ≤100 pF. For larger loads, a series resistor (10–100 Ω) between output and capacitance restores stability without degrading DC accuracy.

Can TS27L4CDT operate from a 2.7 V supply?

No. The absolute minimum supply voltage is 3 V per Table 2 (Operating Conditions). At 2.7 V, internal biasing fails, resulting in undefined output behavior and potential loss of rail-to-ground swing. Designers must ensure V_CC+ ≥3 V across the full operating temperature range.

Does TS27L4CDT support dual-supply operation?

Yes. Though optimized for single-supply use, TS27L4CDT supports dual supplies with V_CC+ and V_CC− spanning ±1.5 V to ±9 V (total 3–18 V), provided the differential input voltage remains within ±18 V and common-mode range stays within −0.3 V to V_CC+ − 1.5 V.

How does the input offset voltage vary across temperature for TS27L4CDT?

TS27L4CDT exhibits a maximum input offset voltage drift of 2 µV/°C (typical), as specified in Table 3. Over the 0°C to +70°C range, this results in ≤140 µV additional offset shift - significantly lower than JFET or bipolar alternatives, enabling stable DC gain without periodic recalibration.