STMicroelectronics TSM104WAIN

Overview

TSM104WAIN from STMicroelectronics is a quad operational amplifier with integrated adjustable shunt voltage reference, designed for precision power supply monitoring and regulation circuits. It delivers 0.5 mV typical input offset voltage, 0.9 MHz gain-bandwidth product, ±1.5V to ±15V dual-supply operation, and 2 kV ESD protection - enabling use in industrial DC-DC feedback loops and analog front-ends of data acquisition systems.

For engineers reviewing the TSM104WAIN datasheet, TSM104WAIN pinout, TSM104WAIN application, or TSM104WAIN equivalent, key selection criteria include its combined op-amp/reference functionality, 1–100 mA sink capability, 0.2 Ω dynamic impedance voltage reference, and SO16 package compatibility with space-constrained PCB layouts.

Technical Context

The device integrates four independent high-precision op-amps and a programmable shunt reference sharing a common cathode terminal. Each op-amp features rail-to-rail output swing (to within 20 mV of rails), 70 dB minimum CMRR, and 65 dB minimum SVR across 5–30 V supply range.

The voltage reference supports adjustable output from V_ref (2.475–2.525 V) up to 36 V with 0.4% initial accuracy (TSM104WA grade) and 30 mV total drift over –40°C to +105°C. Its 0.2 Ω dynamic impedance ensures stable regulation under varying load current (1–100 mA).

Key Specifications

Pinout & Package

Package: SO16 (Plastic Micropackage), 16-pin surface-mount, 1.27 mm pitch, body dimensions 10.0 × 6.0 × 1.75 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad op-amp + shunt reference applications.

Compared with TL431+LM324 and LM336+MCP6004, TSM104WAIN uniquely combines adjustable reference programming, matched thermal drift, and integrated cathode current sinking - making it optimal for compact, high-accuracy power management where space and parametric correlation matter.

Availability

TSM104WAIN is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, and analog signal conditioning requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TSM104WAIN 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The TSM104WAIN belongs to ST's precision analog portfolio, engineered specifically for integrated power management ICs that consolidate error amplification, voltage reference, and current sinking in single-package solutions for switch-mode power supplies.

FAQ

What is the maximum cathode current the TSM104WAIN reference can safely sink?

The TSM104WAIN voltage reference supports continuous cathode current from 1 mA to 100 mA while maintaining regulation and specified dynamic impedance. Absolute maximum rating is not defined separately, but thermal limits (T_j ≤ 150°C, R_thJA = 150°C/W for SO16) constrain sustained 100 mA operation to ambient temperatures below +85°C with minimal PCB copper.

Can the TSM104WAIN operate from a single 5 V supply?

Yes - the device functions with V_CC+ = 5 V and V_CC− = 0 V (ground), enabling single-supply operation. In this configuration, op-amp inputs must remain within 0.3 V of ground or V_CC+, and the reference cathode voltage must be ≥ V_ref (2.475 V) above ground to maintain regulation.

How does the TSM104WAIN's input offset voltage drift compare to standard quad op-amps?

TSM104WAIN specifies 7 µV/°C input offset drift (typical), significantly lower than generic quad op-amps like LM324 (10–20 µV/°C). This tighter drift, combined with 0.5 mV initial offset, ensures <1.5 mV total error over –40°C to +105°C - critical for precision feedback loops.

Is the TSM104WAIN pin-compatible with older TSM104W variants?

Yes - TSM104WAIN (SO16) shares identical pinout and electrical specifications with TSM104WI (DIP16) and TSM104W (SO16, non-A grade). The "A" suffix denotes improved reference accuracy (0.4% vs. 1%), but all versions use the same pin mapping and thermal/mechanical footprint.