STMicroelectronics TSV321RILT

Overview

TSV321RILT from STMicroelectronics is a single-channel, rail-to-rail input/output operational amplifier optimized for low-voltage portable applications. It operates from 2.5 V to 6 V, delivers 1.3 MHz gain bandwidth at 3 V, drives 600 Ω loads within 100 mV of each rail, and supports –40 °C to +125 °C operation - enabling use in battery-powered sensor signal conditioning and headphone driver circuits.

For engineers reviewing the TSV321RILT datasheet, TSV321RILT pinout, TSV321RILT application, or TSV321RILT equivalent, key selection criteria include its rail-to-rail I/O swing, 80 mA output current capability, 27 nV/√Hz input voltage noise, extended common-mode range (VDD – 0.2 V to VCC + 0.2 V), and SOT23-5 package compatibility with space-constrained PCB layouts.

Technical Context

The TSV321RILT employs a CMOS input stage enabling rail-to-rail input common-mode range extending 200 mV beyond supply rails at 25 °C, and an output stage capable of sourcing/sinking ≥80 mA while maintaining <100 mV headroom to VCC/VDD under 600 Ω load. Its 1.3 MHz GBP and 0.6 V/µs slew rate support stable unity-gain buffer and active filter configurations.

Designed as a low-voltage successor to LM324/LM358, it features 60–85 dB CMRR, 70–90 dB PSRR, and 0.2–3 mV input offset voltage (typ./max over temperature), making it suitable for precision DC-coupled amplification where supply headroom is constrained and thermal drift must remain below 2 µV/°C.

Key Specifications

Pinout & Package

TSV321RILT is supplied in the SOT23-5 surface-mount package (ECOPACK® compliant), measuring 2.9 × 2.8 × 1.3 mm with 0.95 mm lead pitch. Thermal resistance junction-to-ambient is 250 °C/W, supporting operation up to +125 °C ambient with appropriate PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV321IDBVR, TSV321RILT reduces supply current by 25% and extends common-mode range; compared with TSV851ICT, it trades 38% lower GBP and 54% less noise for 42% lower power and SOT23-5 footprint - making it optimal for space- and energy-constrained portable designs.

Availability

TSV321RILT is available at Aetrix Electronics and suitable for battery-powered audio devices, industrial sensor nodes, and laptop power management systems requiring stable component supply with guaranteed long-term availability.

Supply support for TSV321RILT 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 components, and MEMS sensors for industrial, automotive, and consumer markets.

The TSV3xx family was developed specifically to replace legacy LM324/LM358 op-amps in low-voltage, rail-to-rail applications - targeting portable electronics, sensor interfaces, and energy-efficient industrial control systems.

FAQ

What is the maximum capacitive load the TSV321RILT can drive without instability?

The TSV321RILT is characterized for stability with up to 500 pF capacitive load when configured as a unity-gain buffer. For loads exceeding 500 pF, a series isolation resistor (≥10 Ω) between output and capacitance is required to maintain phase margin ≥53° and prevent peaking or oscillation.

Does the TSV321RILT support true single-supply operation with input signals at ground potential?

Yes - its rail-to-rail input stage accepts common-mode voltages down to VDD – 0.2 V, allowing direct connection to ground-referenced sensors or DAC outputs in single-supply configurations with VDD = 0 V and VCC = 3.3 V.

How does the output voltage swing change when driving a 32 Ω load versus a 600 Ω load?

At VCC = 3 V, the output swings to within 100 mV of each rail into 600 Ω, but drops to within ~200 mV of rails into 32 Ω due to internal output stage compliance limitations - verified by Figure 12 and 13 in DS4381 Rev 9.

Is the TSV321RILT pin-compatible with other members of the TSV3xx family?

No - the TSV321RILT (SOT23-5) uses a 5-pin configuration, while dual (TSV358) and quad (TSV324) variants use 8-pin and 14-pin packages respectively; pin functions differ across channel count and package types, requiring PCB redesign for substitution.