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

STMicroelectronics TSM104AID

Name: TSM104AID
Brand: STMicroelectronics
SKU: TSM104AID
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSM104AID

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

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

Datasheet:: TSM104AID.pdf

Description:: IC OPAMP GP 4 CIRCUIT 16SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TSM104AID 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, ±1.5 V to ±15 V wide supply range, 375 µA/op supply current, and 0.2 Ω typical dynamic impedance in the reference section - enabling compact, low-power feedback control in isolated DC-DC converters.

For engineers reviewing the TSM104AID datasheet, TSM104AID pinout, TSM104AID application, or TSM104AID equivalent, key selection criteria include its dual-function integration (four op-amps + programmable reference), rail-to-rail input capability up to +36 V, 1–100 mA sink current support, and SO16 package compatibility with space-constrained industrial power management layouts.

Technical Context

The TSM104AID integrates four independent high-precision op-amps and a single adjustable shunt voltage reference on one die. Each op-amp features 20 nA input bias current, 7 µV/°C offset drift, and 0.3 V/µs slew rate; the reference provides 2.45–2.55 V nominal output with 0.4% initial accuracy and 30 mV total deviation over temperature.

Its architecture supports closed-loop regulation without external reference ICs: the reference's cathode connects to op-amp outputs for error amplification, while the adjust pin enables precise setpoint tuning from V_REF to 36 V. Input common-mode range extends to V_CC+ − 1.5 V, and inputs tolerate up to +36 V regardless of supply rails.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	±1.5 V to ±15 V - supports dual-supply operation in analog signal conditioning and single-supply systems down to 3 V total.
Input Offset Voltage (TSM104A)	0.5 mV typ at 25°C - enables accurate error amplification in <1% regulation loops without trimming.
Gain-Bandwidth Product	0.9 MHz - sufficient for stable compensation of switching power supplies up to ~100 kHz switching frequency.
Reference Voltage Accuracy	±0.4% (2.45–2.55 V) - allows direct use in 2.5 V reference-dependent ADCs or DACs without calibration.
Reference Dynamic Impedance	0.2 Ω typ - ensures minimal load-induced voltage shift during fast transient response in feedback paths.
Quiescent Current per Op-Amp	375 µA @ 5 V - enables low-power operation in battery-backed supervisory circuits.
Input Bias Current	20 nA max - reduces offset errors in high-impedance sensor interfaces or RC timing networks.

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1	Output 1	Amplifier A output; drives external compensation network or reference adjust node.
2	Inverting Input 1	Feedback input for op-amp A; connects to output divider in voltage regulation loops.
3	Non-inverting Input 1	Reference or sense input for op-amp A; accepts up to +36 V independent of supply rails.
4	VCC+	Positive supply rail for all op-amps and reference; decoupling required near pin.
5	Non-inverting Input 2	Input for op-amp B; usable as second error amplifier or comparator input.
6	Inverting Input 2	Inverting input for op-amp B; supports differential sensing or current-sense amplification.
7	Output 2	Amplifier B output; can drive secondary regulation path or protection latch.
8	Adjust	Reference adjust terminal; sets output voltage via external resistor divider (V_OUT = V_REF × (1 + R1/R2)).
9	Output 4	Amplifier D output; used for overvoltage/undervoltage supervision or thermal shutdown logic.
10	Inverting Input 4	Inverting input for op-amp D; accepts threshold reference or sensed signal for comparator function.
11	Non-inverting Input 4	Non-inverting input for op-amp D; commonly tied to fixed reference or temperature sensor output.
12	Non-inverting Input 3	Input for op-amp C; supports auxiliary functions like current limiting or soft-start control.
13	Inverting Input 3	Inverting input for op-amp C; used for current-sense feedback in constant-current sources.
14	Output 3	Amplifier C output; drives gate of external pass transistor or MOSFET in linear regulators.
15	Cathode	Reference cathode terminal; sinks 1–100 mA; connects to regulated output node in shunt configuration.
16	VCC−	Negative supply rail; must be connected even in single-supply configurations (e.g., ground).

Key Features

Feature	Design Value
Integrated quad op-amp + shunt reference	Reduces component count by ≥5 parts in flyback or forward converter feedback networks.
0.4% reference voltage accuracy	Eliminates need for external trimming resistors in 5 V or 3.3 V output power supplies.
Input tolerance to +36 V	Enables direct connection to unregulated bus voltages without level-shifting circuitry.
0.2 Ω reference dynamic impedance	Maintains stable reference voltage under fast load transients in digitally controlled PSUs.
375 µA/op quiescent current	Supports always-on supervision in energy-harvesting or ultra-low-power backup systems.

Applications

Switch-Mode Power Supply Feedback

Programmable Voltage Monitor

Use Scenario: Regulating output voltage in isolated DC-DC converters using optocoupler-coupled feedback.

IC Role / Device Role / Timing Role: Quad op-amps implement error amplification, slope compensation, and overcurrent protection; reference sets precise 2.5 V threshold.

Use Value: Single-chip solution replaces discrete op-amp + TL431, reducing PCB area by 40% and improving thermal tracking between reference and amplifier.

Use Scenario: Detecting undervoltage lockout (UVLO) and overvoltage protection (OVP) thresholds in telecom power shelves.

IC Role / Device Role / Timing Role: Op-amps compare rail voltages against independently trimmed reference-derived thresholds; reference provides stable 2.5 V baseline.

Use Value: Enables simultaneous monitoring of +12 V, +5 V, and +3.3 V rails with <10 mV hysteresis using internal op-amps and shared reference.

Battery Management System Reference

Industrial Sensor Signal Conditioning

Use Scenario: Providing accurate reference for cell voltage measurement in 4S Li-ion battery packs.

IC Role / Device Role / Timing Role: Reference supplies stable 2.5 V to ADC reference input; op-amps buffer and scale cell voltage signals.

Use Value: 0.4% reference accuracy ensures ±10 mV absolute cell voltage error across temperature, meeting IEC 62133 requirements.

Use Scenario: Amplifying low-level thermocouple or RTD signals in PLC analog input modules.

IC Role / Device Role / Timing Role: Op-amps configured as instrumentation amps and cold-junction compensators; reference sets gain-setting and offset points.

Use Value: 20 nA input bias current prevents significant offset in >100 kΩ sensor bridges; 0.5 mV V_OS limits zero-error to <0.1°C in RTD measurements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBVR + LM324DR	Discrete solution: separate 2.5 V shunt reference (±1% accuracy) and quad op-amp (3 mV V_OS, 1.2 MHz GBW).	Requires 2 ICs, larger footprint, no shared thermal drift compensation between reference and op-amps.	Preferred when cost sensitivity outweighs board space constraints and long-term stability is secondary.
TSM104WIDT	Pin-compatible successor: improved 0.25 mV V_OS, 1.2 MHz GBW, 0.25% reference accuracy, and extended −40°C to +125°C operation.	Direct drop-in replacement with enhanced precision and wider temperature range; not obsolete.	Select for new designs requiring higher accuracy, better thermal stability, and full industrial temperature support.

Compared with TL431+LM324, TSM104AID reduces layout complexity and improves thermal tracking but trades off some bandwidth; versus TSM104WIDT, it offers legacy compatibility at lower precision and narrower temperature margin.

Availability

TSM104AID is available at Aetrix Electronics and suitable for industrial power supply design, battery management systems, and programmable voltage monitors requiring stable component supply and long-lifecycle support despite its obsolete status.

Supply support for TSM104AID 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 automotive, industrial, and power management ICs with vertical manufacturing capabilities.

The TSM104 series belongs to ST's analog power management portfolio, engineered specifically for integration of precision amplification and voltage reference functions in space-constrained power conversion systems.

FAQ

What is the maximum cathode current the TSM104AID reference can safely sink?

The TSM104AID reference section supports 1 mA to 100 mA cathode current under regulation, with 0.2 Ω typical dynamic impedance. Sustained operation above 100 mA risks exceeding thermal limits; absolute maximum rating is not specified, but datasheet graphs confirm stable regulation only within this range. Derating is recommended above 75 mA at elevated ambient temperatures.

Can the TSM104AID operate from a single 5 V supply?

Yes - the device supports single-supply operation with VCC+ = 5 V and VCC− = 0 V (ground). Input common-mode range extends to VCC+ − 1.5 V (i.e., up to 3.5 V), and inputs tolerate up to +36 V. The reference cathode must connect to a node ≥2.5 V for regulation; output voltage is adjustable from V_REF to 36 V using external resistors.

How does the TSM104AID differ from the TSM104WIDT?

The TSM104WIDT is the designated replacement: it improves input offset voltage to 0.25 mV (vs. 0.5 mV), reference accuracy to ±0.25% (vs. ±0.4%), gain-bandwidth to 1.2 MHz (vs. 0.9 MHz), and extends operating temperature to −40°C to +125°C (vs. −40°C to +105°C). Pinout and basic functionality remain identical.

Is the TSM104AID suitable for automotive applications?

No - the TSM104AID is rated for −40°C to +105°C operation and lacks AEC-Q100 qualification. Its datasheet explicitly states "NOT FOR NEW DESIGN" and identifies it as obsolete. For automotive use, ST recommends the TSM104WIDT (qualified to AEC-Q100 Grade 2) or dedicated automotive-grade alternatives like TS321AQDR.

TSM104AID Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

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:: 500 µV

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

TSM104AID FAQ

1.How can I place an order for TSM104AID through Aetrix?

Please submit a Request for Quotation (RFQ) for TSM104AID 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 TSM104AID reliable?

The price and inventory of TSM104AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM104AID is usually 5 days.

3.What payment methods are accepted for TSM104AID?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM104AID transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSM104AID?

TSM104AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSM104AID 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 TSM104AID?

For technical support, including TSM104AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM104AID requirements.

6.How does Aetrix verify that TSM104AID is sourced from the original manufacturer or authorized distributors?

All TSM104AID 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 TSM104AID meets industry standards.

7.What is the process for return or replacement of TSM104AID?

All TSM104AID units undergo pre-shipment inspection (PSI). If there is an issue with TSM104AID, 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 TSM104AID part is unused and in its original packaging.

Return procedure for TSM104AID:

1.Submit a request within 90 days.

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

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