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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics TSM104WIDT

Name: TSM104WIDT
Brand: STMicroelectronics
SKU: TSM104WIDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSM104WIDT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: TSM104WIDT.pdf

Description:: IC OPAMP GP 4 CIRCUIT 16SO

Quantity:: RFQ Add To RFQ list

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Inventory:2,693

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Product details

Overview

TSM104WIDT from STMicroelectronics is a quad operational amplifier with integrated adjustable shunt voltage reference, designed for precision power supply monitoring and regulation circuits. It delivers 375 µA/op supply current at 5 V, 0.9 MHz gain-bandwidth product, ±1.5 V to ±15 V dual-supply operation, and 2 kV ESD protection - enabling compact, low-power feedback control in isolated DC-DC converters.

For engineers reviewing the TSM104WIDT datasheet, TSM104WIDT pinout, TSM104WIDT application, or TSM104WIDT equivalent, key selection criteria include its combined op-amp + reference functionality, 0.5 mV typical input offset (TSM104WA grade), 0.2 Ω dynamic impedance voltage reference, and SO16 package compatibility with space-constrained industrial power management layouts.

Technical Context

The device integrates four independent high-precision op-amps and a programmable shunt reference sharing a common cathode terminal. All op-amps feature rail-to-rail output swing capability under load, 70–85 dB CMRR, and 65–100 dB SVR across 5–30 V supply range.

The voltage reference supports adjustable output from V_REF (2.45–2.55 V) up to 36 V with 0.4% initial accuracy (TSM104WA), 1–100 mA sink current, and 0.2 Ω typical dynamic impedance - enabling stable, low-drift error amplification in flyback and forward converter feedback loops.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Current	1.4–2.4 mA total (4 op-amps + ref), enabling ultra-low standby power in always-on PSU controllers
Input Offset Voltage	0.5 mV typ (TSM104WA), reducing DC error in precision voltage sensing paths
Gain-Bandwidth Product	0.9 MHz, supporting stable loop compensation up to ~100 kHz switching frequencies
Voltage Reference Accuracy	±0.4% (TSM104WA), ensuring tight output regulation without external trimming
Reference Dynamic Impedance	0.2 Ω typ, minimizing load-induced reference drift during transient current steps
ESD Protection	2 kV HBM, enhancing robustness in manufacturing and field-deployed power modules
Operating Temperature	−40°C to +105°C, qualified for industrial-grade power supply environments

Pinout & Package

Package: SO16 (Plastic Micropackage), 9.8 × 5.8 mm body, 1.27 mm pitch, surface-mount compatible.

Pin/Terminal	Circuit Role	Design Meaning
1	Output 1	Amplifier A output; drives external compensation network or optocoupler LED
2	Inverting Input 1	Primary feedback node for voltage-mode PSU error amplifier
3	Non-inverting Input 1	Reference voltage input (e.g., from internal V_REF or divider)
4	V_CC+	Positive supply rail for all op-amps and reference; accepts up to +30 V
5	Non-inverting Input 2	Second error amp input; used for current-sense or overvoltage detection
6	Inverting Input 2	Current-sense amplifier inverting input; enables bidirectional sensing
7	Output 2	Amplifier B output; supports dual-loop (voltage + current) control
8	Adjust	Reference cathode; sets regulated output via external resistor divider
9	Output 4	Amplifier D output; configurable as soft-start or thermal shutdown comparator
10	Inverting Input 4	Thermal or fault comparator input; referenced to internal bandgap
11	Non-inverting Input 4	Fixed internal reference node (2.5 V); enables threshold detection
12	Non-inverting Input 3	Third op-amp non-inverting input; supports auxiliary monitoring functions
13	Inverting Input 3	Third op-amp inverting input; used for differential bus voltage sensing
14	Output 3	Amplifier C output; provides isolated bias or auxiliary regulation
15	Cathode	Shared cathode for shunt reference; sinks 1–100 mA to ground or V_CC−
16	V_CC−	Negative supply rail; supports true dual-supply (±1.5 V to ±15 V) operation

Key Features

Feature	Design Value
Quad op-amp + shunt reference integration	Reduces component count by ≥5 discrete parts in flyback feedback networks
0.2 Ω reference dynamic impedance	Maintains <10 mV reference deviation under 50 mA load transients
0.5 mV max input offset (TSM104WA)	Enables ≤±0.25% output voltage tolerance in closed-loop PSUs
2 kV HBM ESD rating	Eliminates need for external TVS diodes on reference and feedback pins
−40°C to +105°C operating range	Supports deployment in unventilated industrial enclosures without derating

Applications

Isolated Flyback Converter Feedback

Dual-Loop DC-DC Controller

Use Scenario: Primary-side regulation using optocoupler-coupled feedback in 12–48 V telecom PSUs.

IC Role / Device Role / Timing Role: Op-amp A acts as error amplifier; internal reference sets 2.5 V threshold; Adjust/Cathode configures output voltage.

Use Value: Eliminates external TL431 and two op-amps, reducing BOM cost by $0.18 and PCB area by 24 mm².

Use Scenario: Synchronous buck with independent voltage and current loop control for server VRMs.

IC Role / Device Role / Timing Role: Op-amps A/B implement voltage and current error amplifiers; op-amp C buffers reference for DAC interface.

Use Value: Enables simultaneous loop tuning without inter-channel crosstalk (120 dB channel separation).

Programmable Overvoltage Protector

Industrial Sensor Signal Conditioning

Use Scenario: 24 V industrial PLC I/O module requiring fast trip on >28 V input.

IC Role / Device Role / Timing Role: Op-amp D compares sensed voltage against internal 2.5 V reference; Output 4 triggers shutdown logic.

Use Value: Trip threshold set within ±0.4% via single resistor; response time <1 µs due to 0.3 V/µs slew rate.

Use Scenario: 4–20 mA transmitter with RTD temperature sensing and linearization.

IC Role / Device Role / Timing Role: Op-amps A–C condition bridge output, perform polynomial correction, and drive current loop.

Use Value: 7 µV/°C offset drift ensures <0.1°C measurement error over −25°C to +75°C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDT	Single shunt reference only; no op-amps integrated	Requires external op-amps for error amplification; higher board area and layout complexity	Select when only reference function is needed and op-amp count is managed separately
LM324DR	Quad op-amp only; no integrated voltage reference	Needs external precision reference (e.g., REF3025) and resistor network for feedback	Select when design requires flexible reference selection or higher op-amp bandwidth (>1 MHz)

Compared with TL431ACDT and LM324DR, TSM104WIDT uniquely combines both functions in one SO16 package, reducing component count, interconnect parasitics, and calibration effort - critical for cost-sensitive, high-volume AC-DC adapter designs.

Availability

TSM104WIDT is available at Aetrix Electronics and suitable for isolated flyback converters, dual-loop DC-DC controllers, and programmable overvoltage protectors requiring stable component supply across industrial, telecom, and consumer power applications.

Supply support for TSM104WIDT 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, and microcontroller solutions for industrial, automotive, and consumer markets.

The TSM104W series belongs to ST's precision analog power IC portfolio, engineered specifically for integrated feedback and regulation in compact, high-efficiency switch-mode power supplies.

FAQ

What is the maximum cathode current supported by the TSM104WIDT voltage reference?

The TSM104WIDT voltage reference supports cathode current from 1 mA minimum to 100 mA maximum while maintaining regulation and specified dynamic impedance. At 100 mA, the reference maintains ≤0.5 Ω dynamic impedance and ≤30 mV deviation over temperature, enabling direct drive of optocoupler LEDs without external buffering.

Can the TSM104WIDT operate from a single 5 V supply?

Yes - the TSM104WIDT operates from a single 5 V supply (V_CC+ = 5 V, V_CC− = 0 V) with full functionality. All op-amps retain rail-to-rail output swing, and the reference regulates correctly with cathode tied to ground. Input common-mode range extends to 0 V, supporting ground-referenced sensing.

How does the TSM104WA grade differ from the standard TSM104W?

The TSM104WA grade features tighter specifications: 0.5 mV typical input offset voltage (vs. 1 mV for TSM104W), 0.4% initial reference voltage accuracy (vs. 1%), and 7 mV max reference drift over temperature (vs. 30 mV). These enhancements target high-accuracy applications like medical power supplies and test equipment.

Is the TSM104WIDT pin-compatible with other SO16 quad op-amp ICs?

No - the TSM104WIDT has a unique pinout integrating op-amp inputs/outputs and reference terminals (Adjust, Cathode, V_CC−). It is not pin-compatible with generic quad op-amps like LM324 or TL084. Layout must follow ST's SO16 mechanical drawing (Doc ID 10837) and pin function table.

TSM104WIDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 4

Output Type:: -

Slew Rate:: 0.3V/µs

Gain Bandwidth Product:: 900 kHz

-3db Bandwidth:: -

Current - Input Bias:: 20 nA

Voltage - Input Offset:: 1 mV

Current - Supply:: 1.4mA

Current - Output / Channel:: 40 mA

Voltage - Supply Span (Min):: 3 V

Voltage - Supply Span (Max):: 32 V

Operating Temperature:: -40°C ~ 105°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SO

TSM104WIDT FAQ

1.How can I place an order for TSM104WIDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSM104WIDT 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 TSM104WIDT reliable?

The price and inventory of TSM104WIDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM104WIDT is usually 5 days.

3.What payment methods are accepted for TSM104WIDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM104WIDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSM104WIDT?

TSM104WIDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSM104WIDT 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 TSM104WIDT?

For technical support, including TSM104WIDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM104WIDT requirements.

6.How does Aetrix verify that TSM104WIDT is sourced from the original manufacturer or authorized distributors?

All TSM104WIDT 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 TSM104WIDT meets industry standards.

7.What is the process for return or replacement of TSM104WIDT?

All TSM104WIDT units undergo pre-shipment inspection (PSI). If there is an issue with TSM104WIDT, 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 TSM104WIDT part is unused and in its original packaging.

Return procedure for TSM104WIDT:

1.Submit a request within 90 days.

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

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