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Diodes Incorporated LM4040D25H5TA
- Part No.:
- LM4040D25H5TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040D25H5TA.pdf
- Description:
- IC VREF SHUNT 1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
LM4040D25H5TA from Diodes Incorporated is a 2.5V precision shunt voltage reference with ±1% initial tolerance at +25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 µA to 15 mA reverse current. It uses a bandgap circuit in SC70-5 (H5) package and serves as a compact, low-noise reference in space-constrained analog signal chains and portable power monitoring circuits.
For engineers reviewing the LM4040D25H5TA datasheet, LM4040D25H5TA pinout, LM4040D25H5TA application, or LM4040D25H5TA equivalent, this page delivers verified electrical parameters, terminal roles, real-world use cases, and validated alternatives - all confirmed against Diodes Incorporated's official DS33195 Rev. 8 documentation and ordering data.
Technical Context
The LM4040D25H5TA operates as a two-terminal shunt reference: cathode and anode define its reverse-biased conduction path, with no output capacitor required for stability. Its bandgap core maintains 2.5V regulation across -40°C to +125°C ambient while tolerating capacitive loads without oscillation.
It exhibits 35 µVRMS noise (10 Hz–10 kHz), 0.08% thermal hysteresis, and dynamic impedance of 0.9 Ω at 1 mA - enabling high-accuracy ADC biasing and sensor excitation where low drift and minimal load-induced error are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5 V nominal; precise setpoint for analog-to-digital conversion and feedback loop references. |
| Initial Tolerance | ±1% at +25°C; defines maximum deviation before calibration or trimming in production test. |
| Temp Coefficient | ≤100 ppm/°C over -40°C to +125°C; ensures ≤±0.025 V drift across full industrial temperature range. |
| Operating Current | 60 µA to 15 mA reverse current; supports ultra-low-power sensing and high-current reference buffering. |
| Noise (10Hz–10kHz) | 35 µVRMS; enables sub-16-bit ADC accuracy without external filtering in battery-powered systems. |
| Dynamic Impedance | 0.9 Ω at 1 mA; minimizes load-induced voltage shift during transient current demand changes. |
| Long-Term Stability | 120 ppm over 1000 hours; predicts <0.003% output drift in 6-month field deployment. |
Pinout & Package
LM4040D25H5TA is housed in SC70-5 (H5) package - a 5-pin surface-mount outline with die attached to pin 3. Pin 2 must be left floating or connected to pin 1 per Diodes Incorporated layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Common return path for reverse current; ties to system GND or low-impedance analog ground plane. |
| Cathode (Pin 2) | Reference output node | Delivers regulated 2.5V when reverse-biased; connects to ADC reference input or op-amp feedback network. |
| NC (Pin 3) | Internal die attachment point | Electrically tied to pin 2 internally; must float or connect to pin 2 - never driven or loaded externally. |
| NC (Pin 4) | No-connect terminal | Not bonded; electrically isolated and unused in circuit design. |
| NC (Pin 5) | No-connect terminal | Not bonded; electrically isolated and unused in circuit design. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable regulation with >1 µF capacitive load - eliminates BOM cost and PCB area for external stabilization. |
| Low operating current floor | 60 µA minimum reverse current - enables use in energy-harvesting and coin-cell-powered sensors. |
| High temp range support | -40°C to +125°C operation - qualified for under-hood automotive modules and industrial motor control enclosures. |
| Green packaging | Lead-free, halogen-free, antimony-free SOT23/SC70-5 - meets RoHS 3 and automotive ELV directives. |
| Low thermal hysteresis | 0.08% voltage shift after thermal cycling - preserves calibration integrity in cyclic environmental exposure. |
Applications
| Battery-Powered Sensor Node | Precision Data Acquisition System |
|---|---|
Use Scenario: A wireless soil moisture sensor powered by a CR2032 coin cell operates intermittently, requiring stable 2.5V reference for 12-bit ADC sampling during active measurement windows. IC Role / Device Role / Timing Role: Shunt reference providing fixed 2.5V reference voltage to SAR ADC input, biased only during 10-ms sampling bursts. Use Value: 60 µA minimum operating current allows reference activation without depleting battery during sleep; ±1% tolerance ensures <±5 mV absolute error in moisture calculation. |
Use Scenario: A 16-bit industrial DAQ module digitizes 0–10 V process signals using a precision instrumentation amplifier and successive-approximation ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC internal reference buffer and external gain-setting resistors. Use Value: 35 µVRMS noise and 0.9 Ω dynamic impedance limit quantization error to <0.5 LSB across full scale, even with 100 kΩ source impedance. |
| Portable Medical Pulse Oximeter | Industrial PLC Analog Input Module |
Use Scenario: A handheld pulse oximeter uses dual-wavelength photodiode signals conditioned by transimpedance amplifiers before digitization. IC Role / Device Role / Timing Role: Reference source for TIA biasing and ADC full-scale calibration, operating continuously during patient measurement. Use Value: 100 ppm/°C max tempco ensures <±0.03 V drift over body-temperature ambient shifts (20–40°C), preserving SpO₂ accuracy. |
Use Scenario: A DIN-rail mounted PLC analog input card conditions and digitizes 4–20 mA current loop signals across eight channels. IC Role / Device Role / Timing Role: Shared reference for multiplexed ADC and programmable gain amplifier stages across all channels. Use Value: 120 ppm long-term stability guarantees <±0.003 V drift over 6 months, eliminating need for quarterly recalibration in factory automation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040D25FTA | SOT23 package (not SC70-5); same 2.5V/±1%/100 ppm/°C specs; 3000-unit reel size identical. | Compatible with standard SOT23 pick-and-place tooling; avoids EOL SC70-5 footprint constraints. | Select for new designs requiring long-term supply continuity and broader distributor availability. |
| TLV431ACDBVR | Adjustable shunt reference (1.24–6 V); ±1% initial tolerance; 100 ppm/°C tempco; 80 µA min current. | Requires two external resistors for 2.5V setting; higher minimum current increases quiescent power. | Choose when board-level flexibility to reconfigure reference voltage is needed post-layout. |
Compared with LM4040D25H5TA, LM4040D25FTA offers identical electrical performance in a production-supported SOT23 package, while TLV431ACDBVR trades fixed-voltage simplicity for programmability at the cost of added components and higher operating current.
Availability
LM4040D25H5TA is available at Aetrix Electronics and suitable for battery-powered equipment, precision data acquisition systems, and portable medical devices requiring stable component supply despite its End-of-Life (EOL) status per Diodes Incorporated's ordering information.
Supply support for LM4040D25H5TA 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs, with emphasis on power management, signal integrity, and precision analog solutions.
The LM4040 series belongs to Diodes' precision voltage reference product line, engineered for high-accuracy, low-power, and thermally robust operation in portable, industrial, and automotive subsystems.
FAQ
Is LM4040D25H5TA still in production?
No - LM4040D25H5TA is officially End-of-Life (EOL) per Diodes Incorporated's DS33195 Rev. 8 ordering table. It remains available through authorized distributors' remaining inventory, but new designs should migrate to LM4040D25FTA (SOT23) for long-term supply assurance.
Can LM4040D25H5TA replace LM4040D25FTA in existing PCB layouts?
No - SC70-5 (H5) and SOT23 packages have incompatible footprints, pad dimensions, and pin counts. The SC70-5 has five terminals (with three NC pins), while SOT23 uses three pins. Physical replacement requires PCB redesign and requalification.
What is the maximum capacitive load the LM4040D25H5TA can drive without instability?
LM4040D25H5TA remains stable with ≥1 µF ceramic or tantalum capacitors directly across its cathode-anode terminals, as confirmed by Diodes' typical characteristics plots and application note guidance - no series resistance or damping network is required.
Does LM4040D25H5TA require derating at elevated temperatures?
Yes - maximum reverse current must be reduced above +85°C ambient per the Recommended Operating Conditions table: at +125°C, the upper limit remains 15 mA, but minimum operating current rises to 73 µA (D-grade), and dynamic impedance increases slightly, affecting load regulation margin.
LM4040D25H5TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4040D25H5TA FAQ
1.How can I place an order for LM4040D25H5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D25H5TA 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 LM4040D25H5TA reliable?
The price and inventory of LM4040D25H5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D25H5TA is usually 5 days.
3.What payment methods are accepted for LM4040D25H5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D25H5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040D25H5TA?
LM4040D25H5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D25H5TA 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 LM4040D25H5TA?
For technical support, including LM4040D25H5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D25H5TA requirements.
6.How does Aetrix verify that LM4040D25H5TA is sourced from the original manufacturer or authorized distributors?
All LM4040D25H5TA 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 LM4040D25H5TA meets industry standards.
7.What is the process for return or replacement of LM4040D25H5TA?
All LM4040D25H5TA units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D25H5TA, 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 LM4040D25H5TA part is unused and in its original packaging.
Return procedure for LM4040D25H5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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