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Diodes Incorporated LM4040B50H5TA
- Part No.:
- LM4040B50H5TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040B50H5TA.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,456
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Product details
Overview
LM4040B50H5TA from Diodes Incorporated is a precision 5.0V shunt voltage reference in SC70-5 package with ±0.2% initial tolerance at +25°C, 30ppm/°C max temperature coefficient over –40°C to +125°C, and operates across 74µA to 15mA reverse current. It delivers low noise (80µVRMS, 10Hz–10kHz) and stable regulation for high-accuracy analog signal chains in portable instrumentation.
For engineers reviewing the LM4040B50H5TA datasheet, LM4040B50H5TA pinout, LM4040B50H5TA application, or LM4040B50H5TA equivalent, key selection criteria include reverse breakdown voltage stability under varying load current, thermal hysteresis (<0.08%), long-term drift (120ppm), dynamic impedance (1.1Ω at 1mA), and compatibility with capacitive loads without external compensation.
Technical Context
The LM4040B50H5TA functions as a two-terminal bandgap-based shunt reference, requiring only an external series resistor to regulate voltage across a load. Its internal architecture maintains tight output voltage control despite variations in supply voltage and load current, with minimal dependence on external capacitance.
It achieves ±0.2% accuracy at +25°C and sustains performance across –40°C to +125°C ambient, supported by a maximum temperature coefficient of 30ppm/°C (at 10mA) and thermal hysteresis of 0.08%. The device exhibits low dynamic output impedance (1.1Ω at 1mA, 120Hz) and stable noise characteristics (80µVRMS).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V nominal reverse breakdown voltage at 100µA, enabling precise 5V system reference points. |
| Initial Tolerance | ±0.2% at +25°C, ensuring high first-pass calibration accuracy in production test environments. |
| Temp Coefficient | ≤30ppm/°C (–40°C to +125°C, at 10mA), minimizing voltage drift across industrial temperature ranges. |
| Operating Current | 74µA to 15mA reverse current range, supporting ultra-low-power sensor nodes and high-current data acquisition front-ends. |
| Noise (10Hz–10kHz) | 80µVRMS, critical for high-resolution ADC biasing and low-noise amplifier references. |
| Dynamic Impedance | 1.1Ω at 1mA/120Hz, ensuring minimal load-induced voltage perturbation during transient current demand. |
| Long-Term Stability | 120ppm after 1000 hours, reducing recalibration frequency in field-deployed measurement systems. |
Pinout & Package
The LM4040B50H5TA uses the SC70-5 surface-mount package (end-of-life), with die attached to Pin 3. Pin 2 must be left floating or connected to Pin 1; Pin 3 must be left floating or connected to Pin 2 per layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Reference ground terminal | Common return path for shunt current; connects to system ground or low-side of series resistor. |
| Pin 2 (Cathode) | Output voltage node | Provides regulated 5.0V reference potential; connects to load and feedback network. |
| Pin 3 (NC) | No-connect (die attachment point) | Must be left floating or tied to Pin 2; not electrically functional but thermally coupled to die. |
| Pins 4 & 5 | No-connect | Unused terminals; no internal connection; must remain unconnected in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with up to 1µF tantalum capacitance, simplifying layout and eliminating startup delay from RC filtering. |
| Wide operating current range | 74µA minimum operating current enables use in <100µA battery-powered systems while supporting 15mA loads. |
| Low thermal hysteresis | 0.08% voltage shift after thermal cycling (–40°C ↔ +125°C), preserving calibration integrity in cyclic environments. |
| Green, RoHS-compliant packaging | Lead-free, halogen- and antimony-free SOT23/SC70-5 construction meeting EU RoHS 2015/863/EU requirements. |
| High ESD tolerance | Qualified to >2kV HBM, reducing handling sensitivity and improving yield in automated assembly lines. |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable 5V reference under varying battery voltage (3.0–4.2V). IC Role / Device Role / Timing Role: Shunt reference providing fixed 5.0V reference for ADC VREF input and analog front-end biasing. Use Value: ±0.2% initial tolerance and 30ppm/°C TC ensure <0.05% total error contribution across operating temperature and battery discharge cycle. |
Use Scenario: Industrial PLC analog input module measuring 4–20mA sensor signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC reference buffer and programmable gain amplifier offset trimming. Use Value: 80µVRMS noise and 1.1Ω dynamic impedance prevent quantization noise floor degradation and maintain ENOB >20 bits. |
| Portable Communications | Notebook Power Management |
Use Scenario: LTE modem RF front-end requiring stable 5V bias for LNA and mixer ICs in compact M.2 form factor. IC Role / Device Role / Timing Role: Local shunt reference for DC-DC converter feedback divider and RF IC bias sequencing. Use Value: Wide 74µA–15mA current range allows shared reference use across multiple power rails without external buffering. |
Use Scenario: Notebook motherboard VRM monitoring circuit measuring CPU core voltage with ±1% accuracy requirement. IC Role / Device Role / Timing Role: Calibration reference for system management controller (SMC) ADC measuring rail voltages. Use Value: 120ppm long-term stability ensures >12-month calibration validity without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040B50FTA | SOT23 package (not SC70-5); identical electrical specs; same 5.0V/±0.2%/30ppm/°C performance. | Compatible with standard SOT23 footprints; supports ongoing production where SC70-5 is obsolete. | Select when board redesign permits SOT23 footprint adoption and long-term supply continuity is prioritized. |
| ADR3450BRJZ-R7 | 5.0V, ±0.1% initial accuracy, 3ppm/°C typical TC, higher cost, requires 100nF bypass capacitor. | Used in metrology-grade equipment where sub-ppm/°C drift and lower noise (4.8µVRMS) justify added complexity. | Choose only when TC <10ppm/°C and noise <10µVRMS are mandatory; not drop-in compatible due to capacitor requirement. |
Compared with LM4040B50H5TA, LM4040B50FTA offers identical performance in a currently active package, while ADR3450BRJZ-R7 trades simplicity and cost for ultra-low drift-making the former ideal for legacy SC70-5 designs needing replacement, and the latter suitable only for high-end calibration systems.
Availability
LM4040B50H5TA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communications requiring stable component supply despite its end-of-life status.
Supply support for LM4040B50H5TA 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 devices, with emphasis on power management, signal integrity, and precision analog solutions.
The LM4040 family targets space-constrained, low-power precision reference needs in portable and industrial systems, delivering micro-power operation and high accuracy without external components.
FAQ
What is the minimum operating current for LM4040B50H5TA at +25°C?
The minimum operating current is 74µA at +25°C, verified in the Electrical Characteristics table for LM4040-50 B-grade under IRMIN conditions. This value ensures stable regulation and specified tolerance; operation below this current may cause output voltage deviation beyond ±0.2%.
Can LM4040B50H5TA be used with large capacitive loads?
Yes-the device is explicitly designed for excellent stability with capacitive loads up to 1.0µF tantalum, as confirmed in Typical Characteristics and Application Information sections. No external series resistance or isolation is required, unlike many competing shunt references.
Is LM4040B50H5TA pin-compatible with other LM4040 variants in SC70-5?
Yes-all LM4040xH5TA parts (e.g., LM4040B25H5TA, LM4040C50H5TA) share identical SC70-5 pinout and mechanical dimensions. Only the output voltage and tolerance grade differ; no PCB layout change is needed when substituting within the same package.
Why is LM4040B50H5TA marked as End of Life (EOL)?
Diodes Incorporated discontinued SC70-5 packaging due to low demand and manufacturing consolidation, as stated in the Ordering Information section. The functionally identical LM4040B50FTA in SOT23 remains in full production and is recommended for new designs.
LM4040B50H5TA 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 83 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4040B50H5TA FAQ
1.How can I place an order for LM4040B50H5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040B50H5TA 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 LM4040B50H5TA reliable?
The price and inventory of LM4040B50H5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040B50H5TA is usually 5 days.
3.What payment methods are accepted for LM4040B50H5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040B50H5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040B50H5TA?
LM4040B50H5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040B50H5TA 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 LM4040B50H5TA?
For technical support, including LM4040B50H5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040B50H5TA requirements.
6.How does Aetrix verify that LM4040B50H5TA is sourced from the original manufacturer or authorized distributors?
All LM4040B50H5TA 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 LM4040B50H5TA meets industry standards.
7.What is the process for return or replacement of LM4040B50H5TA?
All LM4040B50H5TA units undergo pre-shipment inspection (PSI). If there is an issue with LM4040B50H5TA, 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 LM4040B50H5TA part is unused and in its original packaging.
Return procedure for LM4040B50H5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040B50H5TA Tags
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TL431BQDBZR
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AN431AN-ATRG1
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