STMicroelectronics TS1872IDT

Overview

TS1872IDT from STMicroelectronics is a dual, rail-to-rail input/output operational amplifier optimized for low-voltage, low-power applications. It operates from 1.8 V to 6 V supply, delivers 1.6 MHz gain bandwidth product, consumes 400 µA per channel, and supports rail-to-rail output swing within 100 mV of each rail into 600 Ω - enabling use in battery-powered audio drivers and portable sensor interfaces.

For engineers reviewing the TS1872IDT datasheet, TS1872IDT pinout, TS1872IDT application, or TS1872IDT equivalent, key selection considerations include its 1.8 V minimum supply, extended common-mode range (VCC− −0.2 V to VCC+ +0.2 V), 65 mA output drive capability, and SO-8 package compatibility with space-constrained portable designs.

Technical Context

The TS1872IDT implements a CMOS input stage enabling rail-to-rail input common-mode operation beyond the supply rails by ±200 mV at 25 °C, while its output stage achieves full rail-to-rail swing with <100 mV headroom into 600 Ω loads. Its unity-gain stable architecture supports capacitive loads up to 100 pF without oscillation.

Designed for single-supply systems, it maintains high CMRR (min. 55 dB) and PSRR (min. 70 dB) across 1.8–5 V supplies and −40 °C to +125 °C temperature range, with input offset voltage drift of only 2 µV/°C and THD of 0.01 % - critical for precision signal conditioning in portable instrumentation.

Key Specifications

Pinout & Package

TS1872IDT is supplied in an SO-8 package (ECOPACK® compliant, RoHS-compliant), measuring 4.90 mm × 6.00 mm × 1.75 mm with 1.27 mm lead pitch. The package supports standard reflow soldering and offers thermal resistance R_thJA = 125 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP6022-I/SN and TLV2462IDR, TS1872IDT uniquely balances 1.8 V operation, rail-to-rail I/O, and 1.6 MHz bandwidth - making it optimal for cost-sensitive, battery-constrained portable systems requiring robust input tolerance and moderate speed.

Availability

TS1872IDT is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable audio drivers, sensor interface modules, and low-voltage industrial controllers requiring stable component supply across extended temperature ranges.

Supply support for TS1872IDT 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 TS187x family was developed specifically for ultra-low-voltage, low-power analog signal conditioning in portable and battery-operated equipment - emphasizing rail-to-rail operation, extended input range, and minimal quiescent consumption without sacrificing bandwidth or drive strength.

FAQ

What is the maximum capacitive load the TS1872IDT can drive while remaining stable?

The TS1872IDT is unity-gain stable with capacitive loads up to 100 pF, as confirmed by phase margin ≥53° in the datasheet (Figure 33). For loads exceeding 100 pF, external series resistance (≥10 Ω) at the output is recommended to maintain stability without degrading bandwidth significantly.

Does TS1872IDT support true rail-to-rail input when VCC is 1.8 V?

Yes - at 1.8 V supply and 25 °C, the common-mode input voltage range extends from VCC− −0.2 V (−0.2 V) to VCC+ +0.2 V (+2.0 V), verified in Table 3 of the datasheet. This allows input signals to exceed the supply rails by 200 mV, critical for interfacing with external sensors or DACs.

Can TS1872IDT operate reliably at −40 °C ambient temperature?

Yes - the device is fully specified from −40 °C to +125 °C. Electrical characteristics including input offset voltage (≤6 mV), supply current (≤600 µA), and gain bandwidth product (≥0.9 MHz) are guaranteed across this range per Tables 4–6 and Figure 28.

Is the SO-8 package of TS1872IDT RoHS-compliant and lead-free?

Yes - the TS1872IDT SO-8 package is ECOPACK®-compliant and RoHS-compliant, with lead-free terminations and halogen-free molding compound, as stated in Section 3 of the datasheet and confirmed in ST's official packaging documentation (Doc ID 6992 Rev 7, page 16).