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Texas Instruments LM4040B10IDBZR
- Part No.:
- LM4040B10IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040B10IDBZR.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:275
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Product details
Overview
LM4040B10IDBZR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.2% initial accuracy (B grade), 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current. It serves as a low-drift, low-noise voltage reference in high-accuracy analog signal chains for industrial sensing and data acquisition.
For engineers reviewing the LM4040B10IDBZR datasheet, LM4040B10IDBZR pinout, LM4040B10IDBZR application, or LM4040B10IDBZR equivalent, key selection criteria include its 10V output tolerance over –40°C to 85°C, minimal required cathode current, absence of output capacitor requirement, and SOT-23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4040B10IDBZR operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 10V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design achieves tight initial tolerance without external components, and its low dynamic impedance (≤0.8Ω at 1mA) ensures stability under varying load conditions.
It functions within a recommended cathode current range of 45μA–15mA and maintains specified performance across –40°C to +85°C ambient temperature. The device exhibits thermal hysteresis of ≤0.08% and long-term stability of 120ppm after 1000 hours, supporting reliable calibration in field-deployed instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal; enables direct interface with 10V full-scale ADCs and DACs without scaling resistors. |
| Initial Accuracy | ±0.2% at 25°C; guarantees ≤±20mV absolute error in factory-calibrated systems. |
| Temp Coefficient | 100ppm/°C max; contributes ≤±6.5mV drift over –40°C to +85°C operating range. |
| Min Cathode Current | 45μA typical; supports ultra-low-power sensor front-ends and battery-operated devices. |
| Output Noise | 35μVRMS (10Hz–10kHz); preserves SNR in 16-bit+ data acquisition systems. |
| Dynamic Impedance | 0.8Ω max at 1mA; minimizes output voltage shift during transient load changes. |
| Operating Temp | –40°C to +85°C; qualified for industrial control and automotive cabin electronics. |
Pinout & Package
LM4040B10IDBZR is packaged in a 3-pin SOT-23 (DBZ) surface-mount package measuring 2.92mm × 1.30mm. The device uses a two-terminal shunt configuration with an optional third terminal for EMI mitigation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connected to regulated supply rail; sinks current to clamp voltage at 10V. |
| Anode (Pin 2) | Reference ground return | Typically tied to system ground; forms the reference potential for output voltage. |
| NC (Pin 3) | No internal connection | Must be left floating or connected to anode per TI EMI guidance; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 10V output | Eliminates external resistor dividers and reduces BOM count in precision reference designs. |
| Stable with all capacitive loads | Enables direct connection to ADC input capacitors or op-amp feedback networks without oscillation risk. |
| Low 35μVRMS noise | Supports ≥16-bit effective resolution in high-fidelity measurement systems without additional filtering. |
| 45μA min operating current | Permits use in energy-harvesting nodes and always-on monitoring circuits with microamp-level budgets. |
| –40°C to +85°C operation | Meets extended industrial temperature requirements for programmable logic controllers and field transmitters. |
Applications
| Industrial Data Acquisition | Energy Infrastructure Monitoring |
|---|---|
Use Scenario: High-resolution voltage measurement in modular I/O systems with 24-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Provides stable 10V reference for ADC full-scale calibration and ratiometric sensor excitation. Use Value: Enables <±0.002% total unadjusted error over temperature, meeting IEC 61000-4-30 Class A power quality analyzer specs. | Use Scenario: Voltage supervision and metering in smart grid RTUs and distribution automation controllers. IC Role / Device Role / Timing Role: Supplies precision reference for isolated analog inputs measuring AC line voltage and current transformers. Use Value: Maintains <±0.01% gain error across –40°C to +70°C cabinet environments, ensuring ANSI C12.20 revenue-grade accuracy. |
| Analog Input Modules | Field Transmitters |
Use Scenario: Modular PLC analog input cards requiring multi-range voltage/current measurement. IC Role / Device Role / Timing Role: Serves as master reference for programmable gain instrumentation amplifiers and multiplexed ADC front-ends. Use Value: Delivers consistent 10V reference across 16 channels with <10ppm inter-channel gain mismatch, enabling true simultaneous sampling. | Use Scenario: 4–20mA loop-powered pressure and temperature transmitters in hazardous areas. IC Role / Device Role / Timing Role: Generates stable excitation voltage for bridge sensors while operating within 3.5mA loop budget. Use Value: Achieves <0.1% FS thermal zero drift over –40°C to +85°C using only 45μA quiescent current, extending battery life in wireless variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF43FH10IDBVR | 10V, ±0.05% initial accuracy, 3ppm/°C TC, higher cost, 1.2mA min current | Used in metrology-grade calibrators where sub-10ppm stability is mandatory | Select when ultra-low drift outweighs micropower operation and cost sensitivity. |
| TL431CDBZR | Adjustable 2.495V–36V output, ±1% accuracy, 50μA min current, no guaranteed 10V option | Common in power supply feedback; lacks factory-trimmed 10V precision and low-noise spec | Choose only if adjustable output and cost are primary; not a drop-in replacement for 10V precision needs. |
Compared with REF43FH10IDBVR, LM4040B10IDBZR trades 5× lower accuracy and 30× higher tempco for 25× lower operating current and 40% lower unit cost; versus TL431CDBZR, it delivers factory-set 10V output with guaranteed noise and stability specs essential for measurement-grade references.
Availability
LM4040B10IDBZR is available at Aetrix Electronics and suitable for industrial data acquisition, energy infrastructure monitoring, and field transmitter designs requiring stable component supply with guaranteed long-term availability and traceable lot documentation.
Supply support for LM4040B10IDBZR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade components.
The LM4040 series was designed specifically for high-accuracy, low-power shunt voltage reference applications in industrial, test & measurement, and sensor signal conditioning systems.
FAQ
What is the maximum cathode current rating for LM4040B10IDBZR?
The absolute maximum cathode current for LM4040B10IDBZR is 25mA, but the recommended operating range is 45μA to 15mA. Exceeding 15mA may increase self-heating and degrade long-term stability; operation above 25mA risks permanent damage per TI's Absolute Maximum Ratings table.
Does LM4040B10IDBZR require an output capacitor for stability?
No, LM4040B10IDBZR is inherently stable with all capacitive loads and does not require an output capacitor. This eliminates board space and cost associated with external stabilization components, simplifying layout in compact analog front-end designs.
What is the thermal hysteresis specification for LM4040B10IDBZR?
The thermal hysteresis for LM4040B10IDBZR is 0.08%, defined as the voltage difference measured at 25°C after cycling between –40°C and +125°C. This low hysteresis ensures repeatable calibration points in systems undergoing repeated thermal cycles, such as outdoor environmental monitors.
Can LM4040B10IDBZR be used in automotive applications?
LM4040B10IDBZR is rated for –40°C to +85°C operation and is suitable for automotive cabin and non-safety-critical subsystems (e.g., infotainment power supplies). For under-hood or ASIL-B/C applications, TI's LM4040-Q1 automotive-qualified variant is required.
How does the 100ppm/°C temperature coefficient impact LM4040B10IDBZR's output over temperature?
With a 100ppm/°C coefficient, LM4040B10IDBZR's 10V output drifts by up to ±0.65mV/°C. Over its full –40°C to +85°C range (ΔT = 125°C), maximum drift is ±12.5mV - well within its ±20mV initial tolerance band, ensuring predictable total error in industrial systems.
LM4040B10IDBZR 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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 180µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 125 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040B10IDBZR FAQ
1.How can I place an order for LM4040B10IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040B10IDBZR 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 LM4040B10IDBZR reliable?
The price and inventory of LM4040B10IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040B10IDBZR is usually 5 days.
3.What payment methods are accepted for LM4040B10IDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040B10IDBZR transactions.
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4.How is shipping managed for LM4040B10IDBZR?
LM4040B10IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040B10IDBZR 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 LM4040B10IDBZR?
For technical support, including LM4040B10IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040B10IDBZR requirements.
6.How does Aetrix verify that LM4040B10IDBZR is sourced from the original manufacturer or authorized distributors?
All LM4040B10IDBZR 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 LM4040B10IDBZR meets industry standards.
7.What is the process for return or replacement of LM4040B10IDBZR?
All LM4040B10IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040B10IDBZR, 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 LM4040B10IDBZR part is unused and in its original packaging.
Return procedure for LM4040B10IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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