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Diodes Incorporated LM4040B25H5TA
- Part No.:
- LM4040B25H5TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040B25H5TA.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,860
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Product details
Overview
LM4040B25H5TA from Diodes Incorporated is a precision 2.5V shunt voltage reference in SC70-5 package, rated for ±0.2% initial tolerance at +25°C, 20ppm/°C max temperature coefficient over –40°C to +125°C, and stable operation across 60µA–15mA reverse current - used as a compact, low-noise reference in portable power monitoring circuits.
For engineers reviewing the LM4040B25H5TA datasheet, LM4040B25H5TA pinout, LM4040B25H5TA application, or LM4040B25H5TA equivalent, key selection criteria include reverse breakdown voltage accuracy, thermal stability under varying load current, capacitive load immunity, and compatibility with space-constrained PCB layouts requiring SC70-5 footprint.
Technical Context
The LM4040B25H5TA operates as a two-terminal bandgap-based shunt reference, regulating voltage by sinking variable current through its cathode-anode path. Its internal architecture maintains tight output voltage control without external capacitors, even with up to 1nF of capacitive loading at the cathode.
It achieves 2.5V nominal reverse breakdown with ±0.2% tolerance at +25°C, and sustains <±30ppm/°C drift across –40°C to +125°C when biased at 1mA. Dynamic impedance remains ≤0.8Ω at 120Hz, enabling fast transient response in feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5V nominal reverse breakdown voltage - sets precise bias point for ADCs, DACs, and comparator thresholds. |
| Initial Tolerance | ±0.2% at +25°C - ensures ≤±5mV absolute error in calibration-critical systems without trimming. |
| Temp Coefficient | ≤20ppm/°C (typ), ≤100ppm/°C (max) - limits drift to ≤±0.3mV over full industrial temperature range. |
| Operating Current | 60µA to 15mA reverse current - supports ultra-low-power sensor nodes and high-current precision supplies. |
| Noise (10Hz–10kHz) | 45µVRMS - enables high-resolution data acquisition without added filtering overhead. |
| Dynamic Impedance | 0.8Ω at 1mA, 120Hz - minimizes AC error during load transients in closed-loop regulation. |
| Long-Term Stability | 120ppm (1000 hrs) - guarantees minimal calibration drift in field-deployed instrumentation. |
Pinout & Package
SC70-5 package (EOL status confirmed per Diodes datasheet DS33195 Rev. 8), 2.1mm × 1.25mm × 0.9mm body, lead-free and RoHS-compliant. Pin 2 (Anode) and Pin 3 (Cathode) are electrically connected internally; Pin 1 is NC; Pins 4–5 are unused terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connect (NC) | Not bonded; must remain unconnected to avoid parasitic coupling or mechanical stress. |
| Pin 2 | Anode | Reference ground node; ties to system GND or low-impedance return path for stable biasing. |
| Pin 3 | Cathode | 2.5V output node; connects to series resistor and load; shares die attachment with Pin 2. |
| Pins 4 & 5 | No Connect (NC) | Unbonded; floating per datasheet - no routing or soldering required. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with ≥1nF capacitive load - eliminates BOM cost and board area for decoupling caps in portable designs. |
| Low operating current | 60µA minimum - enables use in battery-powered devices with multi-year shelf life. |
| High temperature stability | ≤100ppm/°C max TC - meets industrial-grade accuracy requirements without external compensation. |
| Low noise performance | 45µVRMS (10Hz–10kHz) - avoids signal corruption in 16-bit+ data converters. |
| Robust ESD rating | Class 2 HBM (≥2kV) - withstands handling in standard assembly environments without special precautions. |
Applications
| Battery Voltage Monitor | Precision ADC Reference |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in wearables with 3.0–4.2V range using a 12-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5V reference to ADC VREF pin, rejecting supply ripple. Use Value: Enables ±1.2mV absolute measurement accuracy over –20°C to +70°C ambient, meeting medical-grade wearable specs. |
Use Scenario: Calibrating a 16-bit sigma-delta ADC in portable gas analyzers. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion chain, referenced against internal PGA gain stages. Use Value: Delivers <±0.5 LSB integral nonlinearity error due to <45µVRMS noise and <0.3mV thermal drift. |
| Portable Power Supply Feedback | Industrial Sensor Signal Conditioning |
Use Scenario: Setting output voltage of a low-quiescent-current DC-DC converter in handheld test equipment. IC Role / Device Role / Timing Role: Precision shunt element in optocoupler-isolated feedback loop, replacing TL431 where size is constrained. Use Value: Maintains ±0.5% output regulation across 0–100mA load and 5–24V input, with no external compensation needed. |
Use Scenario: Biasing bridge sensors (e.g., strain gauges) in wireless structural health monitors. IC Role / Device Role / Timing Role: Excitation reference for ratiometric measurement, directly tied to ADC reference to cancel ratio errors. Use Value: Achieves <0.05% full-scale error stability over –40°C to +85°C, eliminating need for on-board calibration tables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040B25FTA | SOT23-3 package; same 2.5V/±0.2%/20ppm/°C spec; 3000-unit reel; active production. | Requires larger PCB footprint (2.9mm × 1.3mm vs. SC70-5's 2.1mm × 1.25mm); compatible with standard pick-and-place. | Select for new designs requiring long-term supply continuity and broader distributor availability. |
| ADR3425BRJZ-R7 | 2.5V/±0.1%/3ppm/°C; 650µA quiescent; SOT23-5; higher accuracy but higher current and cost. | Used where sub-10ppm/°C drift is mandatory (e.g., metrology); not drop-in due to different pinout and biasing. | Choose only when 0.1% initial tolerance and <5ppm/°C TC are required - not for cost-sensitive portable designs. |
Compared with LM4040B25H5TA, LM4040B25FTA offers identical electrical performance in a widely supported, actively produced package, while ADR3425BRJZ-R7 trades higher precision and lower drift for increased power consumption and cost - making the original part optimal for space-constrained, battery-operated applications where ±0.2% and 20ppm/°C meet system requirements.
Availability
LM4040B25H5TA is available at Aetrix Electronics and suitable for battery-powered equipment, portable instrumentation, and precision power supplies requiring stable component supply despite its End-of-Life (EOL) status per Diodes datasheet DS33195.
Supply support for LM4040B25H5TA 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 family targets portable and space-constrained systems needing micro-power, high-accuracy voltage references - designed specifically for battery longevity, thermal robustness, and minimal PCB real estate usage.
FAQ
Is LM4040B25H5TA still manufacturable?
No - Diodes Incorporated has marked LM4040B25H5TA as End-of-Life (EOL) per datasheet DS33195 Rev. 8. It is no longer in active production, though limited legacy stock may be available. New designs should migrate to LM4040B25FTA (SOT23-3) or equivalent active alternatives.
Can LM4040B25H5TA drive a 100pF capacitive load?
Yes - the device is explicitly characterized for stability with ≥1nF capacitive loads at the cathode, so 100pF poses no risk of oscillation or settling degradation. No series resistance or isolation is required for such small capacitance.
What is the maximum reverse current before damage occurs?
The absolute maximum continuous reverse current is 20mA per Diodes datasheet DS33195. Operation above 15mA is outside recommended conditions and risks accelerated long-term drift or thermal runaway - design must ensure IR ≤15mA under worst-case supply and load conditions.
How does pin configuration differ between SC70-5 and SOT23 packages?
SC70-5 (H5) uses five pins with Pins 2 and 3 shorted internally (Anode/Cathode), Pin 1 NC, and Pins 4–5 unconnected. SOT23-3 uses three pins: Anode (Pin 1), Cathode (Pin 2), and NC (Pin 3). Layouts are not mechanically or electrically interchangeable without redesign.
LM4040B25H5TA 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:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 68 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4040B25H5TA FAQ
1.How can I place an order for LM4040B25H5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040B25H5TA 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 LM4040B25H5TA reliable?
The price and inventory of LM4040B25H5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040B25H5TA is usually 5 days.
3.What payment methods are accepted for LM4040B25H5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040B25H5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040B25H5TA?
LM4040B25H5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040B25H5TA 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 LM4040B25H5TA?
For technical support, including LM4040B25H5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040B25H5TA requirements.
6.How does Aetrix verify that LM4040B25H5TA is sourced from the original manufacturer or authorized distributors?
All LM4040B25H5TA 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 LM4040B25H5TA meets industry standards.
7.What is the process for return or replacement of LM4040B25H5TA?
All LM4040B25H5TA units undergo pre-shipment inspection (PSI). If there is an issue with LM4040B25H5TA, 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 LM4040B25H5TA part is unused and in its original packaging.
Return procedure for LM4040B25H5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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