Texas Instruments TSM104WAID

Overview

TSM104WAID 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 supply range, and 2 kV ESD protection - enabling use in industrial DC-DC feedback loops and analog sensor signal conditioning.

For engineers reviewing the TSM104WAID datasheet, TSM104WAID pinout, TSM104WAID application, or TSM104WAID equivalent, key selection criteria include its dual-function architecture (four op-amps + programmable reference), 0.2 Ω typical dynamic impedance in reference mode, 20 nA input bias current, and SO16 package compatibility with space-constrained PCB layouts.

Technical Context

The device integrates four independent high-precision op-amps and a single adjustable shunt voltage reference sharing a common cathode terminal. All op-amps feature rail-to-rail output swing capability under ±15 V supplies and maintain stable phase margin (>40°) across 1–100 mA load currents.

The voltage reference operates over 1–100 mA cathode current, with 2.45–2.52 V nominal output at 25°C (TSM104WA grade), ±30 mV total deviation over –40°C to +105°C, and <0.5 Ω dynamic impedance - supporting accurate closed-loop regulation in programmable power supplies.

Key Specifications

Pinout & Package

Package: SO16 (Plastic Micropackage), 150 °C/W thermal resistance junction-to-ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431ACDR and LM324DR, TSM104WAID uniquely combines both functions in one SO16 package, reducing layout complexity and interconnect noise - critical for compact, high-accuracy power management systems where trace parasitics degrade reference stability.

Availability

TSM104WAID is available at Aetrix Electronics and suitable for industrial power supervision, battery management systems, programmable lab power supplies, and analog sensor signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for TSM104WAID 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, specializing in power management, analog, microcontrollers, and automotive-grade ICs.

The TSM104WAID belongs to ST's precision analog power management portfolio, engineered specifically for integrated voltage supervision and regulation in space-constrained industrial and test equipment.

FAQ

What is the maximum cathode current supported by the TSM104WAID voltage reference?

The TSM104WAID voltage reference supports cathode currents from 1 mA to 100 mA, with specified dynamic impedance and voltage accuracy maintained across this full range. Operation below 1 mA may cause loss of regulation, while exceeding 100 mA risks thermal overstress given the SO16 package's 150 °C/W thermal resistance.

Can the TSM104WAID operate from a single 5 V supply?

Yes - the TSM104WAID supports single-supply operation with VCC+ = 5 V and VCC− = 0 V (ground). In this configuration, the op-amps retain rail-to-rail output swing, and the internal reference remains active at 2.45–2.52 V, enabling use in 3.3 V or 5 V embedded systems without negative rail generation.

How does the TSM104WAID's input offset voltage drift affect long-term stability?

The TSM104WAID exhibits 7 µV/°C input offset voltage drift, resulting in ≤0.7 mV total drift over a 100°C temperature span (–40°C to +60°C). This translates to <0.01% error in a 10 V reference buffer application, making it suitable for applications requiring <0.1% total system accuracy over temperature.

Is the TSM104WAID pin-compatible with earlier TSM104W variants?

Yes - the TSM104WAID shares identical SO16 pinout and electrical specifications with the TSM104W series, including absolute maximum ratings and functional block diagram. The 'A' suffix denotes improved initial voltage reference accuracy (±0.4% vs. ±1%), but all pin connections, supply requirements, and op-amp characteristics remain fully compatible.