STMicroelectronics TSM103WIDT

Overview

TSM103WIDT from STMicroelectronics is a dual operational amplifier with integrated 2.5V fixed voltage reference, configured as one independent op-amp and one reference-biased op-amp. It delivers 0.5mV typical input offset voltage, 0.9MHz unity-gain bandwidth, ±0.7% reference accuracy over temperature, 1.5kV ESD protection, and operates from 3V to 32V single supply (±1.5V to ±16V dual). It is used in precision power supply feedback loops and analog sensor signal conditioning.

For engineers reviewing the TSM103WIDT datasheet, TSM103WIDT pinout, TSM103WIDT application, or TSM103WIDT equivalent, key selection criteria include dual-op-amp + reference integration, rail-to-rail output swing (0V to VCC−1.5V), sink current capability up to 50mA, low 350µA/op supply current at 5V, and SO-8 package compatibility for space-constrained industrial control modules.

Technical Context

The device integrates two functionally distinct amplifiers: Op-Amp 1 has its non-inverting input internally tied to a trimmed 2.5V bandgap reference, enabling precise comparator or error amplifier operation without external components; Op-Amp 2 is fully independent with standard differential inputs. Both share common supply rails and thermal substrate.

Reference performance is characterized by 0.2Ω typical dynamic impedance, 1–100mA cathode current regulation range, and ±0.7% initial tolerance (TSM103W grade) with 7mV/°C max drift over −40°C to +105°C. Amplifier sections exhibit matched gain-bandwidth (0.9MHz typ.) and common-mode rejection >70dB.

Key Specifications

Pinout & Package

SO-8 plastic micropackage (3.9mm × 4.9mm, 1.27mm pitch), surface-mount, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM358DR and TLV2462CDR, TSM103WIDT uniquely combines reference accuracy, low offset, and dual-amplifier functionality in one SO-8 package-reducing component count and thermal mismatch in power management ICs where space and long-term stability are constrained.

Availability

TSM103WIDT is available at Aetrix Electronics and suitable for switch-mode power supply feedback, industrial sensor signal conditioning, programmable current limiting, and overvoltage protection circuits requiring stable component supply across extended temperature ranges.

Supply support for TSM103WIDT 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 chips, and MEMS sensors for industrial, automotive, and consumer markets.

The TSM103W belongs to ST's precision analog portfolio, developed specifically for cost-sensitive, space-constrained power management applications requiring integrated reference stability and dual-amplifier flexibility in a single monolithic die.

FAQ

What is the maximum allowable supply voltage for TSM103WIDT?

The absolute maximum supply voltage is 36V DC. Continuous operation is specified from 3V to 32V. Exceeding 32V risks exceeding the 150°C junction temperature limit under load, especially in SO-8 packages with 175°C/W thermal resistance. Derating is required above 25°C ambient per the datasheet's thermal curves.

Can Pin 8 (VREF) be used as a standalone 2.5V reference without using the op-amps?

Yes. Pin 8 functions as a dedicated 2.5V bandgap reference output with 0.2Ω dynamic impedance and 1–100mA regulation range. It remains active regardless of op-amp configuration and does not require either amplifier to be powered or biased. Load regulation error stays below 10mV across its full current range.

Does the TSM103WIDT support dual-supply operation?

Yes. The device operates with split supplies from ±1.5V to ±16V. Pin 4 serves as VCC− (negative rail) and Pin 7 as VCC+ (positive rail). Input common-mode range extends to within 1.5V of either rail, and output swing reaches within 1.5V of each supply - verified per the "Operating Conditions" table on page 2 of the April 2004 datasheet.

How does the input offset voltage drift affect long-term accuracy in temperature-varying environments?

Input offset voltage drift is specified at 7µV/°C maximum. Over a −40°C to +105°C range (145°C span), worst-case drift is 1.015mV - added to the 2mV max initial offset yields ≤3.015mV total error. This remains within acceptable bounds for 12-bit systems (LSB = ~2.4mV at 10V full scale), making it suitable for industrial-grade measurement front-ends.