STMicroelectronics TS1874AIDT

Overview

TS1874AIDT from STMicroelectronics is a quad-channel, rail-to-rail input/output operational amplifier optimized for ultra-low-voltage operation (1.8 V to 6 V supply), delivering 1.6 MHz gain bandwidth, 400 µA per channel supply current, and ±65 mA output drive capability. It serves as a precision analog signal conditioner in battery-powered portable electronics requiring wide common-mode range (V_CC− − 0.2 V to V_CC+ + 0.2 V) and high output swing (within 100 mV of rails at 600 Ω load).

For engineers reviewing the TS1874AIDT datasheet, TS1874AIDT pinout, TS1874AIDT application, or TS1874AIDT equivalent, this device is selected for low-power sensor interfaces, audio driver stages, and multi-channel signal conditioning where rail-to-rail performance at sub-2 V operation is critical - not for high-speed, high-precision, or high-voltage applications.

Technical Context

The TS1874AIDT implements a CMOS input stage enabling rail-to-rail input common-mode range extending 200 mV beyond both supply rails at 25 °C, paired with a robust AB-class output stage capable of sourcing/sinking ≥60 mA while maintaining rail-to-rail output swing under 600 Ω load. Its 1.6 MHz GBP and 0.54 V/µs slew rate support stable unity-gain configurations with capacitive loads up to 100 pF.

Designed for single-supply systems, it achieves 77 dB minimum CMRR and 90 dB SVRR across 1.8–5 V supplies, with input offset voltage tightly specified at 1.5 mV max over temperature and 2 µV/°C drift - enabling accurate DC-coupled amplification without external trimming in portable instrumentation.

Key Specifications

Pinout & Package

TS1874AIDT is packaged in SO-14 (Small Outline, 14-pin), a surface-mount plastic package with 1.27 mm pitch, 8.55–8.75 mm body length, and 3.80–4.00 mm width - compatible with standard reflow profiles and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP6004-E/SL and LMV324IDR, TS1874AIDT uniquely supports true rail-to-rail input at 1.8 V while maintaining 1.6 MHz bandwidth and 400 µA/channel - making it the only option for compact, battery-operated systems requiring full dynamic range from ground to supply rail without external components.

Availability

TS1874AIDT is available at Aetrix Electronics and suitable for portable communication devices, battery-powered medical wearables, and laptop/notebook peripheral interfaces requiring stable component supply across automotive-grade temperature ranges (−40°C to +125°C).

Supply support for TS1874AIDT 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 management ICs, analog chips, and MEMS sensors for industrial, automotive, and consumer markets.

TS1874AIDT belongs to the TS187xA family of low-voltage, rail-to-rail op-amps engineered specifically for energy-constrained portable electronics - emphasizing ultra-low ICC, wide supply flexibility, and robust input/output swing at sub-2 V operation.

FAQ

What is the maximum capacitive load the TS1874AIDT can drive while remaining stable?

The TS1874AIDT is unity-gain stable with capacitive loads up to 100 pF, as verified in Figure 33 of the datasheet. Driving larger loads (e.g., >200 pF) requires isolation via a series resistor (≥100 Ω) between the output and capacitance to prevent peaking or oscillation - no external compensation network is needed for standard PCB traces or small ceramic decoupling caps.

Does the TS1874AIDT support true rail-to-rail input at 1.8 V supply?

Yes. At V_CC = 1.8 V, the common-mode input voltage range extends from −0.2 V to +2.0 V (V_CC− − 0.2 V to V_CC+ + 0.2 V), confirmed in Table 3 of the datasheet. This allows direct connection of ground-referenced sensors or signals biased below the negative rail without external level-shifting circuitry.

Can TS1874AIDT replace LM324 in existing SO-14 designs?

Pin compatibility exists for basic connections (V_CC+, V_CC−, inputs, outputs), but functional replacement requires validation: TS1874AIDT operates down to 1.8 V (vs. LM324's 3 V min), has rail-to-rail I/O (LM324 does not), and draws 400 µA/channel (LM324 draws ~1.5 mA). Layout changes may be needed for decoupling and thermal relief due to lower power dissipation.

What is the output short-circuit current limit of TS1874AIDT?

The TS1874AIDT does not include internal short-circuit current limiting. Absolute maximum ratings specify destructive dissipation occurs if all outputs are simultaneously shorted; the typical short-circuit output current is ~80 mA (per amplifier) as noted in footnote 7 of Table 2. External current-limiting resistors or foldback protection are recommended for sustained fault conditions.