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Texas Instruments LM4040D10IDBZR
- Part No.:
- LM4040D10IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040D10IDBZR.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:27,164
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Product details
Overview
LM4040D10IDBZR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V 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 high-accuracy analog signal chains for industrial sensing and data acquisition.
For engineers reviewing the LM4040D10IDBZR datasheet, LM4040D10IDBZR pinout, LM4040D10IDBZR application, or LM4040D10IDBZR equivalent, key selection criteria include its 10V output tolerance over –40°C to 85°C, low dynamic impedance (<1.1Ω), thermal hysteresis of 0.08%, and SOT-23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4040D10IDBZR operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 10V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design ensures grade-specific accuracy and temperature stability without requiring external compensation components.
It achieves stable regulation across capacitive loads up to 10nF and exhibits low dynamic impedance (0.3–1.1Ω) and minimal voltage drift versus cathode current (≤10mV over 1mA–15mA), enabling use in battery-powered and thermally varying environments where long-term voltage fidelity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal; enables direct interface with 10-bit+ SAR ADCs and precision DACs requiring exact full-scale reference. |
| Initial Accuracy | ±1.0% at 25°C; defines maximum deviation before calibration, critical for unadjusted sensor front-ends. |
| Temp Coefficient | 150ppm/°C max; contributes ≤15mV drift over –40°C to 85°C ambient, supporting industrial-grade measurement stability. |
| Operating Current | 45μA to 15mA cathode range; allows ultra-low-power standby modes and robust load regulation in active circuits. |
| Output Noise | 35μVRMS (10Hz–10kHz); minimizes added uncertainty in high-resolution digitization paths. |
| Dynamic Impedance | ≤1.1Ω at 1mA; ensures <1mV output shift under 1mA load transients, preserving reference integrity during signal sampling. |
Pinout & Package
LM4040D10IDBZR is housed in a 3-pin SOT-23 (DBZ) package measuring 2.92mm × 1.30mm, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input | Primary terminal for sinking regulated current; connects to supply rail via series resistor to set operating point. |
| Anode (Pin 2) | Common ground reference | Must be connected to system ground; forms return path for cathode current and defines output voltage node. |
| NC (Pin 3) | No internal connection | Unused terminal; electrically isolated-no routing or grounding required on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free operation | Stable with all capacitive loads up to 10nF; eliminates need for output bypass capacitor and associated layout area. |
| Micropower startup | 45μA typical minimum cathode current; enables use in energy-harvesting and coin-cell-powered systems. |
| Extended temperature range | Specified from –40°C to +85°C; supports deployment in industrial control cabinets and outdoor instrumentation. |
| Low thermal hysteresis | 0.08% voltage shift after thermal cycling; maintains repeatability in systems undergoing repeated power-on/off cycles. |
Applications
| Industrial Analog Input Module | Energy Infrastructure Metering |
|---|---|
Use Scenario: High-channel-count PLC analog input card conditioning 4–20mA sensor signals into 0–10V ADC inputs. IC Role / Device Role / Timing Role: Provides stable 10V reference for 16-bit SAR ADCs and programmable gain instrumentation amplifiers. Use Value: Enables ±0.1% full-scale measurement accuracy across temperature, meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Revenue-grade electricity meter using isolated sigma-delta ADCs for voltage and current channel referencing. IC Role / Device Role / Timing Role: Supplies precision 10V reference to dual-channel 24-bit delta-sigma converters sampling grid voltage and current simultaneously. Use Value: Maintains <0.2% total error over 10-year field life, satisfying ANSI C12.20 Class 0.2 accuracy certification. |
| Field Transmitter Signal Conditioning | Precision Audio Level Detection |
Use Scenario: Two-wire 4–20mA smart transmitter with HART modulation, converting RTD or strain gauge outputs. IC Role / Device Role / Timing Role: References the excitation current source and ADC used for sensor linearization and digital output scaling. Use Value: Delivers <50ppm/°C effective drift contribution, allowing transmitter calibration intervals to extend to 24 months. | Use Scenario: Professional audio analyzer measuring THD+N and dynamic range with RMS-to-DC conversion. IC Role / Device Role / Timing Role: Sets full-scale threshold for logarithmic level detectors and calibrates peak-hold circuitry. Use Value: 35μVRMS noise floor ensures <–110dBc residual noise floor, enabling accurate -100dBFS signal detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C10IDBZR | Same 10V output, ±0.5% initial accuracy (C grade), 75ppm/°C tempco, 20μVRMS noise | Better accuracy/noise but higher minimum current (60μA) and narrower temp range (–40°C to 85°C only) | Select when tighter initial tolerance and lower noise justify cost premium and layout changes are acceptable. |
| REF3010AIDBZR | 10V output, ±0.2% accuracy, 50ppm/°C tempco, 28μVRMS noise, 50μA min current | Higher accuracy and lower drift, but requires 1.2V headroom above reference voltage and uses different topology (series, not shunt) | Choose for ultra-stable systems needing series-reference architecture; verify supply headroom and load regulation compatibility. |
Compared with TL4050C10IDBZR and REF3010AIDBZR, the LM4040D10IDBZR offers lowest BOM cost and simplest two-terminal implementation, trading off absolute accuracy and noise for ease of integration in cost-sensitive industrial modules where ±1% tolerance is sufficient.
Availability
LM4040D10IDBZR is available at Aetrix Electronics and suitable for industrial analog input modules, energy infrastructure metering, and field transmitter designs requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040D10IDBZR 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 and high-volume manufacturing.
The LM4040 series was engineered specifically for cost-sensitive, space-constrained industrial and instrumentation applications demanding reliable shunt reference performance without external components.
FAQ
What is the operating temperature range for LM4040D10IDBZR?
The LM4040D10IDBZR is characterized for operation from –40°C to +85°C (industrial temperature range). Its electrical specifications-including 10V output, ±1.0% initial accuracy, and 150ppm/°C temperature coefficient-are guaranteed across this full range, making it suitable for deployment in factory automation and outdoor monitoring equipment.
Does LM4040D10IDBZR require an output capacitor?
No, the LM4040D10IDBZR is stable with all capacitive loads and does not require an output capacitor for regulation. This simplifies PCB layout and reduces bill-of-materials count, especially in compact sensor nodes and portable instrumentation where board space is constrained.
What is the minimum cathode current needed for LM4040D10IDBZR to regulate properly?
The LM4040D10IDBZR requires a minimum cathode current of 45μA (typical) to maintain regulation. At 25°C, regulation is guaranteed down to 75μA; over the full –40°C to 85°C range, the minimum rises to 80μA. Designers must size the series current-limiting resistor accordingly to ensure compliance across temperature extremes.
How does the NC pin (Pin 3) function in LM4040D10IDBZR?
The NC pin (Pin 3) on the LM4040D10IDBZR has no internal connection and must remain unconnected on the PCB. It is electrically isolated and serves only as a mechanical placeholder in the SOT-23-3 package; routing or grounding this pin provides no functional benefit and may risk mechanical interference during assembly.
Can LM4040D10IDBZR be used in automotive applications?
The LM4040D10IDBZR is not qualified for automotive AEC-Q100 applications. It is specified for industrial temperature range (–40°C to 85°C), whereas automotive-grade variants like LM4040Q series operate up to 125°C and undergo additional qualification testing. For automotive use, TI recommends LM4040C10QDBZR or LM4040D10QDBZR instead.
LM4040D10IDBZR 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 180µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 135 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040D10IDBZR FAQ
1.How can I place an order for LM4040D10IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D10IDBZR 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 LM4040D10IDBZR reliable?
The price and inventory of LM4040D10IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D10IDBZR is usually 5 days.
3.What payment methods are accepted for LM4040D10IDBZR?
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4.How is shipping managed for LM4040D10IDBZR?
LM4040D10IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D10IDBZR 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 LM4040D10IDBZR?
For technical support, including LM4040D10IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D10IDBZR requirements.
6.How does Aetrix verify that LM4040D10IDBZR is sourced from the original manufacturer or authorized distributors?
All LM4040D10IDBZR 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 LM4040D10IDBZR meets industry standards.
7.What is the process for return or replacement of LM4040D10IDBZR?
All LM4040D10IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D10IDBZR, 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 LM4040D10IDBZR part is unused and in its original packaging.
Return procedure for LM4040D10IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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