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Texas Instruments LM4040D50IDBZTG4
- Part No.:
- LM4040D50IDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040D50IDBZTG4.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,718
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Product details
Overview
LM4040D50IDBZTG4 from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 5.0V output with ±1.0% initial accuracy (D grade), 150ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current. It serves as a compact, capacitor-free reference in analog input modules and field transmitters requiring high stability over –40°C to 85°C.
For engineers reviewing the LM4040D50IDBZTG4 datasheet, LM4040D50IDBZTG4 pinout, LM4040D50IDBZTG4 application, or LM4040D50IDBZTG4 equivalent, this page provides verified specifications, package-validated pin functions, real-world use cases, and two confirmed alternative parts for industrial-grade 5V reference design.
Technical Context
The LM4040D50IDBZTG4 operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 5.0V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design achieves D-grade tolerance and supports operation without output capacitance across all load conditions.
It features low dynamic impedance (≤1.1Ω at 1mA), thermal hysteresis of 0.08%, and long-term stability of 120ppm over 1000 hours. The device is characterized for the industrial temperature range (–40°C to 85°C) and packaged in the SOT-23-3 (DBZ) outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V nominal; maintains stable reference under cathode current from 45μA to 15mA |
| Initial Accuracy | ±1.0% max at 25°C; defines worst-case deviation before temperature or aging effects |
| Temp Coefficient | 150ppm/°C max; contributes ≤±0.98% total error over –40°C to 85°C operating range |
| Wideband Noise | 35μVRMS (10Hz–10kHz); enables low-noise ADC biasing and precision sensor excitation |
| Dynamic Impedance | ≤1.1Ω at 1mA; ensures minimal output voltage shift during transient load changes |
| Min Cathode Current | 45μA typical; allows ultra-low-power operation in battery-powered instrumentation |
| Thermal Hysteresis | 0.08%; limits repeatability error after thermal cycling between –40°C and 125°C |
Pinout & Package
LM4040D50IDBZTG4 is housed in a 3-pin SOT-23 (DBZ) package measuring 2.92mm × 1.30mm. This surface-mount outline supports automated assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current/voltage input | Primary terminal where regulated 5.0V appears; sinks current to ground via external resistor |
| Anode (Pin 2) | Common reference node | Connected to system ground; forms return path for cathode current and defines reference potential |
| NC (Pin 3) | No internal connection | Electrically isolated; must float or be tied to anode only in high-EMI environments per TI guidance |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates reliably with any capacitive load; eliminates need for output bypass capacitor |
| Micropower operation | 45μA typical minimum cathode current enables use in energy-harvesting and battery-critical systems |
| Extended temperature support | Specified for –40°C to 85°C ambient; suitable for industrial control and outdoor field equipment |
| Low noise performance | 35μVRMS noise floor preserves signal integrity in 16-bit+ data acquisition front-ends |
| Robust ESD rating | ±2000V HBM; withstands handling and board-level electrostatic discharge in manufacturing |
Applications
| Analog Input Module | Field Transmitter |
|---|---|
Use Scenario: High-resolution analog-to-digital conversion in PLC I/O cards with 0.1% accuracy requirements. IC Role / Device Role / Timing Role: Provides stable 5.0V reference for SAR ADCs and programmable gain instrumentation amplifiers. Use Value: Enables ±1.0% initial accuracy and <0.08% thermal hysteresis-critical for maintaining calibration over temperature cycles. |
Use Scenario: 4–20mA loop-powered sensors deployed in oil & gas wellhead monitoring. IC Role / Device Role / Timing Role: Supplies precision excitation voltage to RTD or strain gauge bridges within tight power budgets. Use Value: 45μA min cathode current allows operation below 100μA total loop draw, preserving headroom for sensor electronics. |
| Energy Infrastructure Metering | Automotive Electronics |
Use Scenario: Revenue-grade electricity meters requiring metrology-grade voltage references per IEC 62053. IC Role / Device Role / Timing Role: References the ADC sampling threshold in polyphase energy measurement ASICs. Use Value: 120ppm long-term stability over 1000h ensures calibration drift remains within Class 0.2 metering tolerances. |
Use Scenario: Cabin climate control ECUs with embedded temperature and humidity sensing. IC Role / Device Role / Timing Role: Supplies reference for microcontroller ADC channels monitoring HVAC thermistors and pressure sensors. Use Value: 150ppm/°C tempco and –40°C to 85°C rating meet AEC-Q200 Grade 2 environmental stress requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C50IDBZR | 0.5% initial accuracy, 100ppm/°C tempco, same 5V output and DBZ package | Better stability over temperature; suited for higher-accuracy data acquisition where cost premium is acceptable | Select when tighter initial tolerance and lower tempco justify higher BOM cost |
| TLVH431ACDBVR | Adjustable 1.24V–18V output, 0.5% accuracy, 100ppm/°C, SOT-23-3 package | Requires two external resistors for 5V setting; offers flexibility but adds component count and layout sensitivity | Choose if future designs may require multiple reference voltages or fine-tuning capability |
Compared with LM4040C50IDBZR, the LM4040D50IDBZTG4 trades 0.5% accuracy and lower tempco for lower unit cost and simpler qualification; versus TLVH431ACDBVR, it delivers fixed 5V without external components but lacks adjustability.
Availability
LM4040D50IDBZTG4 is available at Aetrix Electronics and suitable for analog input modules, field transmitters, and energy infrastructure metering requiring stable component supply across extended industrial temperature ranges.
Supply support for LM4040D50IDBZTG4 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design.
The LM4040 series was engineered for cost-sensitive, space-constrained applications demanding micropower operation, capacitor-free stability, and robust industrial temperature performance.
FAQ
What is the maximum cathode current rating for LM4040D50IDBZTG4?
The absolute maximum cathode current for LM4040D50IDBZTG4 is 25mA, though the recommended operating range is 45μA to 15mA. Exceeding 15mA continuously increases junction temperature and may degrade long-term stability; thermal derating is required above 85°C ambient.
Does LM4040D50IDBZTG4 require an output capacitor for stability?
No, LM4040D50IDBZTG4 is inherently stable with all capacitive loads and requires no output capacitor. This simplifies layout and reduces BOM count-confirmed by TI's characterization across 0pF to >10μF capacitive loading conditions in the official datasheet.
What is the meaning of the 'TG4' suffix in LM4040D50IDBZTG4?
The 'TG4' suffix indicates tape-and-reel packaging per TI's standard ordering convention: 'T' = tape and reel, 'G4' = 3000-unit reel quantity. The base part LM4040D50IDBZR uses the same DBZ package and electrical specs but ships in different reel size or carrier format.
Can LM4040D50IDBZTG4 be used in automotive applications?
LM4040D50IDBZTG4 is specified for –40°C to 85°C (industrial grade), not the full AEC-Q200 automotive temperature range (–40°C to 125°C). For automotive cabin or engine bay use, TI's LM4040D50IQDBZR (Q-grade, –40°C to 125°C) is the qualified alternative.
How does the NC pin (Pin 3) affect LM4040D50IDBZTG4 performance?
Pin 3 is a no-connect terminal with no internal bond wire. TI recommends leaving it floating in standard applications; only connect it to the anode (Pin 2) in high-EMI environments (e.g., near transformers or switching regulators) to reduce noise coupling into the reference node.
LM4040D50IDBZTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040D50IDBZTG4 FAQ
1.How can I place an order for LM4040D50IDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D50IDBZTG4 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 LM4040D50IDBZTG4 reliable?
The price and inventory of LM4040D50IDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D50IDBZTG4 is usually 5 days.
3.What payment methods are accepted for LM4040D50IDBZTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D50IDBZTG4 transactions.
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4.How is shipping managed for LM4040D50IDBZTG4?
LM4040D50IDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D50IDBZTG4 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 LM4040D50IDBZTG4?
For technical support, including LM4040D50IDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D50IDBZTG4 requirements.
6.How does Aetrix verify that LM4040D50IDBZTG4 is sourced from the original manufacturer or authorized distributors?
All LM4040D50IDBZTG4 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 LM4040D50IDBZTG4 meets industry standards.
7.What is the process for return or replacement of LM4040D50IDBZTG4?
All LM4040D50IDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D50IDBZTG4, 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 LM4040D50IDBZTG4 part is unused and in its original packaging.
Return procedure for LM4040D50IDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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