STMicroelectronics TSM103WID

Overview

TSM103WID from STMicroelectronics is a dual operational amplifier with integrated 2.5V precision voltage reference, featuring 0.5mV typical input offset voltage, 0.9MHz unity-gain bandwidth, and ±0.7% reference accuracy over temperature. It operates from 3V to 32V supply, delivers rail-to-rail compatible output swing (0V to VCC–1.5V), and supports sink currents up to 100mA - ideal for feedback control in switched-mode power supplies.

For engineers reviewing the TSM103WID datasheet, TSM103WID pinout, TSM103WID application, or TSM103WID equivalent, key selection considerations include its dual-op-amp + reference integration, SO-8 package thermal resistance (175°C/W), ESD rating (1.5kV), output impedance (0.2Ω), and guaranteed operation from –40°C to +105°C.

Technical Context

The device integrates two independent amplifiers: Op-Amp 1 has its non-inverting input internally tied to a 2.5V bandgap reference, enabling precise threshold detection or error amplification; Op-Amp 2 is fully independent with standard differential inputs. Both share a common supply rail and operate across ±1.5V to ±16V dual or 3–32V single supply.

Reference performance is specified at 2.482V to 2.518V (±0.7%) over full temperature range with dynamic impedance ≤0.5Ω and minimum cathode current of 1mA for regulation. Input common-mode range includes ground, and large-signal voltage gain exceeds 25 V/mV.

Key Specifications

Pinout & Package

Package: SO-8 (Plastic Micropackage), 175°C/W junction-to-ambient thermal resistance, rated for –40°C to +105°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431ACDR and LM358DR, TSM103WID uniquely combines reference and dual amplifiers in one SO-8 package, reducing total solution size by ~40% and eliminating inter-component drift - critical for compact, high-accuracy power management.

Availability

TSM103WID is available at Aetrix Electronics and suitable for switched-mode power supplies, battery charging systems, industrial sensor interfaces, and programmable current sources requiring stable component supply across extended temperature ranges.

Supply support for TSM103WID 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 ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The TSM103WID belongs to ST's precision analog power management portfolio, engineered specifically for cost-sensitive, space-constrained feedback control in AC/DC and DC/DC converters.

FAQ

Can TSM103WID operate from a 3.3V supply?

No. The minimum recommended supply voltage is 3V, but the output swing specification (0V to VCC–1.5V) implies that at 3.3V supply, maximum output is only 1.8V - insufficient for driving many optocouplers or logic interfaces. ST specifies guaranteed operation starting at 5V for typical SMPS applications.

What is the maximum load capacitance supported on the reference cathode (Pin 8)?

The reference output (Pin 8) is stable with up to 100nF capacitive load when used with ≥1mA cathode current. Larger capacitances may cause oscillation due to phase shift introduced by the 0.2Ω dynamic impedance interacting with load reactance - ST recommends RC damping if >100nF is required.

Is the 2.5V reference accessible independently of Op-Amp 1?

Yes. Pin 8 is the dedicated cathode terminal of the internal reference and can be used as a standalone 2.5V source. It is electrically isolated from Op-Amp 1's input nodes, though both share the same bandgap core - thus temperature drift and long-term stability are correlated.

How does TSM103WID differ from TSM103WAID?

TSM103WAID offers tighter reference accuracy (±0.4% vs. ±0.7%) and lower input offset voltage (0.5mV typ. vs. same, but max 3mV vs. 5mV). Both share identical pinout, package, and temperature range. The 'A' grade is selected for higher-precision applications where reference drift must be minimized below 7mV over temperature.