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Home > Products > Integrated Circuits (ICs) > Linear > Special Purpose Amplifiers

STMicroelectronics TSM103WAIDT

Name: TSM103WAIDT
Brand: STMicroelectronics
SKU: TSM103WAIDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSM103WAIDT

Manufacturer:: STMicroelectronics

Category:: Special Purpose Amplifiers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TSM103WAIDT.pdf

Description:: IC AMPLIFIER 8SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TSM103WAIDT 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 ±0.4% reference accuracy at 25°C. It operates from 3V to 32V supply, delivers rail-to-rail compatible output swing (0V to VCC–1.5V), and supports sink current up to 100mA - used in switch-mode power supply feedback loops and analog sensor signal conditioning.

For engineers reviewing the TSM103WAIDT datasheet, TSM103WAIDT pinout, TSM103WAIDT application, or TSM103WAIDT equivalent, key selection criteria include dual-opamp + reference integration, low quiescent current (350µA/op @ 5V), wide common-mode input range including ground, fixed 2.5V reference with 0.2Ω dynamic impedance, and SO-8 package compatibility for space-constrained power management designs.

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 error amplification in voltage regulation circuits; Op-Amp 2 is fully independent for general-purpose use. Both amplifiers share a single 3–32V supply and exhibit matched AC performance (0.9MHz GBP, 0.4V/µs slew rate) and DC specs (7µV/°C offset drift, 70–85dB CMRR).

Reference section provides a 2.5V output with ±0.4% initial accuracy (TSM103WA grade), 7–30mV total deviation over –40°C to +105°C, and 0.2Ω dynamic impedance - optimized for closed-loop feedback where stable reference voltage and low-output-impedance sourcing/sinking (1–100mA) are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3V to 32V - supports single-supply industrial and automotive power rails without level-shifting.
Input Offset Voltage (typ)	0.5mV - enables high-accuracy current sensing and error amplification in <1% tolerance regulation.
Unity-Gain Bandwidth	0.9MHz - sufficient for 50kHz–200kHz SMPS compensation loops with phase margin >45°.
Reference Accuracy (25°C)	±0.4% - ensures ≤10mV absolute error in 2.5V setpoint for precision voltage monitoring.
Output Sink Current	100mA max - drives optocoupler LEDs or small MOSFET gates directly in isolated feedback paths.
Dynamic Reference Impedance	0.2Ω - minimizes load-induced reference droop during transient current steps in regulation loops.
ESD Protection	1.5kV HBM - meets IEC 61000-4-2 Level 2 for board-level robustness in industrial environments.

Pinout & Package

SO-8 plastic micropackage (package code: D), 1.27mm pitch, 5.0mm × 4.0mm body, 1.75mm max height, R_thJA = 175°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting Input (Op-Amp 1)	Feedback node for voltage reference-based error amplifier; accepts external resistor divider for adjustable output regulation.
2	Non-Inverting Input (Op-Amp 1)	Internally connected to 2.5V reference - no external connection required; defines regulation setpoint.
3	Inverting Input (Op-Amp 2)	Fully independent input for sensor signal conditioning, comparator hysteresis, or auxiliary control loop.
4	VCC– / Ground	Power return for both op-amps and reference; supports single-supply operation with ground-referenced inputs.
5	Non-Inverting Input (Op-Amp 2)	Fully independent input; usable as buffer, integrator, or active filter stage without reference coupling.
6	Output (Op-Amp 2)	General-purpose output capable of sourcing 40mA / sinking 50mA; rail-to-rail swing limited to VCC–1.5V.
7	VCC+	Positive supply rail (3–32V); powers both op-amps and internal reference simultaneously.
8	Output (Op-Amp 1)	Primary error amplifier output; drives optocoupler or gate driver in isolated SMPS feedback path.

Key Features

Feature	Design Value
Dual op-amp + 2.5V reference integration	Reduces BOM count by eliminating discrete reference IC and second op-amp in SMPS feedback networks.
Input common-mode range includes ground	Enables direct sensing of 0V-referenced shunt resistors or battery terminals without level-shifting circuitry.
Low 350µA/op supply current	Supports always-on monitoring functions in energy-sensitive systems (e.g., standby power supervisors).
100mA reference sink capability	Drives standard PC817-type optocouplers without external transistor, simplifying isolated feedback design.
0.2Ω reference dynamic impedance	Maintains <1mV reference perturbation under 10mA load transients - critical for tight-regulation applications.

Applications

Switch-Mode Power Supply Feedback

Industrial Current Sensing

Use Scenario: Regulating output voltage in isolated flyback or forward converters using optocoupler-coupled feedback.

IC Role / Device Role / Timing Role: Op-Amp 1 acts as error amplifier comparing sensed output against internal 2.5V reference; Op-Amp 2 conditions auxiliary signals or provides slope compensation.

Use Value: Eliminates need for external reference and second op-amp, reducing footprint by ≥30% and improving thermal stability via monolithic matching.

Use Scenario: Amplifying mV-level voltage drop across shunt resistors in motor drive or battery management systems.

IC Role / Device Role / Timing Role: Op-Amp 2 serves as precision instrumentation amplifier front-end; Op-Amp 1 provides stable bias or reference buffering.

Use Value: Input offset of 0.5mV enables accurate measurement of ≤100mV shunt drops (e.g., 10A @ 10mΩ), supporting ±1% current accuracy.

Programmable Voltage Monitor

Temperature-Compensated Sensor Interface

Use Scenario: Detecting overvoltage/undervoltage thresholds in 12V–24V industrial power rails.

IC Role / Device Role / Timing Role: Op-Amp 1 configured as comparator with hysteresis; internal 2.5V reference sets trip point via resistor divider.

Use Value: ±0.4% reference accuracy ensures ≤100mV absolute threshold error at 24V, meeting IEC 61000-4-30 Class A requirements.

Use Scenario: Linearizing and scaling output of NTC thermistors or RTDs in HVAC or process control sensors.

IC Role / Device Role / Timing Role: Op-Amp 2 implements 2-wire or 3-wire bridge interface; Op-Amp 1 supplies excitation current or reference bias.

Use Value: 7µV/°C offset drift minimizes temperature-induced gain error, enabling <0.1°C measurement uncertainty over –20°C to +85°C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDR	Single adjustable shunt regulator (no op-amp), 2.495V nominal, ±1% accuracy, 100mA sink, no dual-amplifier function	Requires external op-amp for error amplification; lacks integrated second op-amp for auxiliary signal processing	Select when only reference + basic comparator functionality is needed and board space allows discrete op-amp addition.
LM358DR	Dual op-amp only (no reference), 2mV max offset, 1MHz GBP, 36V max supply, no integrated 2.5V reference or sink capability	Requires external precision reference (e.g., REF200) and additional components for regulation loop implementation	Select when full flexibility in reference selection and op-amp configuration is prioritized over integration and BOM reduction.

Compared with TL431ACDR and LM358DR, TSM103WAIDT uniquely combines matched dual op-amps with a high-accuracy, low-impedance 2.5V reference in one SO-8 package - delivering measurable BOM reduction, improved thermal tracking, and simplified layout for power supply feedback and precision analog monitoring.

Availability

TSM103WAIDT is available at Aetrix Electronics and suitable for switch-mode power supply feedback, industrial current sensing, programmable voltage monitoring, and temperature-compensated sensor interface applications requiring stable component supply and long-term lifecycle support.

Supply support for TSM103WAIDT 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.

TSM103WAIDT belongs to ST's precision analog power management portfolio, engineered specifically to integrate error amplification and voltage reference functions into compact, high-reliability power conversion systems.

FAQ

What is the maximum operating junction temperature for TSM103WAIDT?

The absolute maximum junction temperature is 150°C, with thermal resistance R_thJA = 175°C/W in SO-8 package. Derating is required above 70°C ambient; full electrical specifications are guaranteed from –40°C to +105°C free-air temperature.

Can Op-Amp 1 be used without connecting its inverting input?

No - Op-Amp 1 requires external feedback from its output (Pin 8) to inverting input (Pin 1) to function as a closed-loop error amplifier. Leaving Pin 1 unconnected results in open-loop saturation and invalid operation per datasheet Figure 10.

Is the 2.5V reference accessible externally for other circuits?

No - the 2.5V reference is internal and exclusively connected to the non-inverting input of Op-Amp 1 (Pin 2). It is not brought out to any pin and cannot be used as a standalone reference source for other devices on the board.

Does TSM103WAIDT support dual-supply operation (±V_CC)?

Yes - the device supports ±1.5V to ±16V dual supplies, as specified in the "Wide Power Supply Range" section. When operated symmetrically (e.g., ±15V), the reference remains at +2.5V relative to ground, and both op-amps retain full input common-mode range including ground.

TSM103WAIDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Amplifier

Applications:: Power Management

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

TSM103WAIDT FAQ

1.How can I place an order for TSM103WAIDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSM103WAIDT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TSM103WAIDT reliable?

The price and inventory of TSM103WAIDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM103WAIDT is usually 5 days.

3.What payment methods are accepted for TSM103WAIDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM103WAIDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSM103WAIDT?

TSM103WAIDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSM103WAIDT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TSM103WAIDT?

For technical support, including TSM103WAIDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM103WAIDT requirements.

6.How does Aetrix verify that TSM103WAIDT is sourced from the original manufacturer or authorized distributors?

All TSM103WAIDT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSM103WAIDT meets industry standards.

7.What is the process for return or replacement of TSM103WAIDT?

All TSM103WAIDT units undergo pre-shipment inspection (PSI). If there is an issue with TSM103WAIDT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TSM103WAIDT part is unused and in its original packaging.

Return procedure for TSM103WAIDT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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