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STMicroelectronics TSM104AIN
- Part No.:
- TSM104AIN
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
TSM104AIN.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,871
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Product details
Overview
TSM104AIN from STMicroelectronics is a quad operational amplifier with integrated adjustable shunt voltage reference, designed for power supply supervision and precision voltage regulation in compact analog systems. It delivers 0.9MHz gain-bandwidth, 0.5mV typical input offset voltage (TSM104WA grade), ±1.5V to ±15V supply range, and 2kV ESD protection - enabling use in industrial DC-DC feedback loops and multi-rail monitoring circuits.
For engineers reviewing the TSM104AIN datasheet, TSM104AIN pinout, TSM104AIN application, or TSM104AIN equivalent, key selection considerations include its dual-function architecture (four op-amps + programmable reference), cathode current capability (1–100mA), dynamic impedance (0.2Ω typ), and SO16 package compatibility with space-constrained PCB layouts.
Technical Context
The device integrates four independent high-precision op-amps and a two-terminal adjustable shunt reference sharing a common cathode terminal. Its op-amp stage features rail-to-rail output swing (27V high-level, 20mV low-level at VCC+ = 30V), 70–85dB CMRR, and 0.3V/µs slew rate - suitable for error amplification in isolated flyback controllers.
The reference section operates over 2.45–2.55V nominal Vref (0.4% precision), supports 1–100mA sink current, and maintains 0.2Ω typical dynamic impedance - allowing stable regulation across load transients without external compensation capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±1.5V to ±15V - enables operation from single 3V up to ±15V rails without level-shifting circuitry |
| Gain-Bandwidth Product | 0.9MHz - sufficient for error amplifier bandwidth in 100kHz switching power supplies |
| Input Offset Voltage | 0.5mV typ (TSM104WA) - ensures ≤10mV total error in 20V feedback networks |
| Cathode Current Range | 1–100mA - supports direct drive of optocoupler LEDs or discrete pass transistors |
| Dynamic Impedance | 0.2Ω typ - minimizes output voltage deviation under 50mA load steps |
| ESD Protection | 2kV HBM - meets IEC 61000-4-2 Level 2 for board-level robustness |
| Input Bias Current | 20nA max - allows high-impedance sensor interface without significant leakage error |
Pinout & Package
Package: SO16 (Plastic Micropackage), 16-pin small-outline surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output 1 | Amplifier A output - drives external compensation network in voltage-mode PWM controllers |
| 2 | Inverting Input 1 | Feedback node for op-amp A - connects to resistor divider from regulated output |
| 3 | Non-inverting Input 1 | Reference input for op-amp A - tied to internal Vref or external setpoint |
| 4 | VCC+ | Positive supply rail - shared by all op-amps and reference section |
| 5 | Non-inverting Input 2 | Amplifier B non-inverting input - used for current-sense amplification |
| 6 | Inverting Input 2 | Amplifier B inverting input - connects to current-sense resistor |
| 7 | Output 2 | Amplifier B output - provides isolated current-limit signal |
| 8 | Adjust | Reference adjust terminal - sets output voltage via external resistor divider (Vout = Vref × (1 + R1/R2)) |
| 9 | Output 4 | Amplifier D output - configured as comparator for overvoltage lockout |
| 10 | Inverting Input 4 | Comparator threshold input - connected to scaled output voltage |
| 11 | Non-inverting Input 4 | Comparator reference input - tied to internal Vref or external trip point |
| 12 | Non-inverting Input 3 | Amplifier C non-inverting input - used for temperature-compensated biasing |
| 13 | Inverting Input 3 | Amplifier C inverting input - connects to thermistor network |
| 14 | Output 3 | Amplifier C output - drives thermal foldback circuit |
| 15 | Cathode | Shared cathode for voltage reference - sinks total current from all regulated outputs |
| 16 | VCC− | Negative supply rail - returns all op-amp and reference currents |
Key Features
| Feature | Design Value |
|---|---|
| Quad op-amp + shunt reference integration | Reduces component count by 5+ discrete parts in multi-output SMPS designs |
| 0.4% reference voltage precision | Enables ±0.5% output regulation without trimming resistors |
| 1–100mA cathode current capability | Directly drives PC817 optocoupler LED (IF = 5mA) or BC847 base (IB = 100µA) |
| 0.2Ω typical dynamic impedance | Limits output voltage shift to <10mV during 50mA transient load steps |
| 2kV HBM ESD rating | Eliminates need for external TVS diodes on reference and feedback pins |
Applications
| AC-DC Adapter Feedback Loop | Multi-Output DC-DC Converter |
|---|---|
Use Scenario: Regulating +12V and +5V outputs from a flyback converter using optocoupler-isolated feedback. IC Role / Device Role / Timing Role: TSM104AIN's op-amp A compares secondary-side voltage against internal Vref; op-amp B amplifies primary-side current sense; reference section drives optocoupler LED. Use Value: Single-chip solution replaces three discrete op-amps and one TL431, reducing footprint by 42% and improving thermal coupling between reference and error amp. | Use Scenario: Simultaneous regulation of +3.3V, +5V, and +12V rails in telecom power modules. IC Role / Device Role / Timing Role: Op-amps C and D monitor individual rail voltages; reference section provides common precision reference for all three error amplifiers. Use Value: Shared 2.5V reference eliminates inter-rail drift; 0.2Ω dynamic impedance ensures <5mV cross-regulation error during load transients. |
| Programmable Lab Power Supply | Industrial Sensor Signal Conditioning |
Use Scenario: User-adjustable 0–30V output with current limiting and overvoltage protection. IC Role / Device Role / Timing Role: Op-amp A acts as voltage control amplifier; op-amp B implements constant-current limit; op-amp D serves as OVP comparator; reference sets both CV and CC thresholds. Use Value: Single IC implements full regulation, limiting, and protection - eliminating need for separate TL431, LM339, and LM358 sections. | Use Scenario: Amplifying and offsetting signals from RTD or strain gauge bridges in PLC analog input modules. IC Role / Device Role / Timing Role: Op-amps A and B form instrumentation amplifier front-end; op-amp C provides programmable offset; reference supplies excitation voltage and ADC reference. Use Value: Matched op-amp characteristics minimize gain/offset drift; 20nA input bias current prevents bridge imbalance errors in high-Z sensor interfaces. |
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 |
|---|---|---|---|
| TL431ACDR + LM324DR | Discrete implementation: separate 2.5V reference (±1% tolerance) and quad op-amp (1.2MHz GBW, 3mV Vio) | Requires 5 extra passives per channel; no shared cathode; higher board area | Preferred when reference and op-amp must be independently biased or when >100mA sink current is needed |
| LM336Z-2.5 + MCP6004-E/SL | 2.5V shunt reference (±0.5% tolerance) + rail-to-rail op-amp (1MHz GBW, 1.6mV Vio) | No integrated cathode path; op-amp lacks ESD hardening (1kV HBM); no shared thermal substrate | Chosen for ultra-low-power (1µA ref current) or rail-to-rail input requirements beyond TSM104AIN's spec |
Compared with TL431+LM324 and LM336+MCP6004, TSM104AIN offers tighter reference precision (0.4% vs. ±1%), lower dynamic impedance (0.2Ω vs. 0.5Ω), and monolithic thermal tracking - critical for stable regulation across temperature in compact power supplies.
Availability
TSM104AIN is available at Aetrix Electronics and suitable for AC-DC adapters, multi-output DC-DC converters, programmable lab power supplies, and industrial sensor signal conditioning requiring stable component supply and long-term manufacturability.
Supply support for TSM104AIN 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, microcontrollers, and automotive ICs.
The TSM104 series belongs to ST's precision analog power management portfolio, engineered specifically for integration into compact, cost-sensitive switched-mode power supply feedback networks with minimal external components.
FAQ
What is the maximum cathode current the TSM104AIN reference can safely sink?
The TSM104AIN reference section is rated for 1–100mA cathode current under normal operation, with infinite short-circuit duration specified. At 100mA, power dissipation reaches 2.5W (Vref × Ik), requiring adequate PCB copper area or heatsinking to maintain junction temperature below 150°C in SO16 package.
Can the op-amps in TSM104AIN drive capacitive loads directly?
Yes, but with limitations: stability is guaranteed for CL ≤ 100pF at unity gain. For larger capacitive loads (e.g., >200pF), a series resistor (20–100Ω) must be added between op-amp output and capacitor to isolate the pole and prevent oscillation - verified in ST's application note AN2193.
How does the TSM104AIN's reference accuracy compare between TSM104W and TSM104WA grades?
TSM104WA specifies 0.4% initial voltage accuracy (2.475–2.525V at 25°C), while TSM104W has 1% (2.45–2.55V). Both exhibit ≤30mV drift over –40°C to +105°C, but WA grade achieves tighter matching between op-amp offset and reference drift due to monolithic process optimization.
Is the TSM104AIN pin-compatible with other quad op-amp + reference ICs like the LM324 + TL431 combination?
No - TSM104AIN uses a proprietary 16-pin SO layout integrating reference cathode and adjust terminals, unlike the separate 8-pin LM324 and 3-pin TL431. Direct replacement requires PCB redesign, though functional equivalence exists for feedback loop implementation with appropriate external resistor networks.
TSM104AIN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 16-DIP
TSM104AIN FAQ
1.How can I place an order for TSM104AIN through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM104AIN 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 TSM104AIN reliable?
The price and inventory of TSM104AIN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM104AIN is usually 5 days.
3.What payment methods are accepted for TSM104AIN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM104AIN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM104AIN?
TSM104AIN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM104AIN 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 TSM104AIN?
For technical support, including TSM104AIN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM104AIN requirements.
6.How does Aetrix verify that TSM104AIN is sourced from the original manufacturer or authorized distributors?
All TSM104AIN 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 TSM104AIN meets industry standards.
7.What is the process for return or replacement of TSM104AIN?
All TSM104AIN units undergo pre-shipment inspection (PSI). If there is an issue with TSM104AIN, 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 TSM104AIN part is unused and in its original packaging.
Return procedure for TSM104AIN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSM104AIN Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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