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Texas Instruments LM4040A10IDBZR
- Part No.:
- LM4040A10IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040A10IDBZR.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,334
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Product details
Overview
LM4040A10IDBZR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.1% initial accuracy (A-grade), 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current. It serves as a stable voltage reference in high-accuracy analog signal chains for industrial data acquisition and field transmitters.
For engineers reviewing the LM4040A10IDBZR datasheet, LM4040A10IDBZR pinout, LM4040A10IDBZR application, or LM4040A10IDBZR equivalent, this page provides verified specifications, package details, real-world use cases, and validated alternative options for precision voltage reference selection in temperature-stable, low-noise, and space-constrained designs.
Technical Context
The LM4040A10IDBZR operates as a two-terminal shunt reference, requiring no external capacitors and remaining stable with all capacitive loads. Its Zener-zap trimmed reverse breakdown voltage ensures tight initial tolerance and low thermal drift across –40°C to 85°C ambient temperature.
It features low dynamic impedance (0.8Ω typical at 1mA), low long-term stability drift (120ppm after 1000 hours), and thermal hysteresis of only 0.08%, enabling repeatable performance in cyclic thermal environments without recalibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal; enables direct scaling of 10-bit/12-bit ADCs with full-scale range alignment |
| Initial Accuracy | ±0.1% at 25°C; supports <1 LSB error in 10-bit systems without trimming |
| Temp Coefficient | 100ppm/°C max; contributes ≤±0.65% error over –40°C to 85°C operating range |
| Operating Current | 45μA to 15mA; allows ultra-low-power sensor biasing and high-current DAC reference buffering |
| Output Noise | 35μVRMS (10Hz–10kHz); preserves SNR in 16-bit+ precision measurement front-ends |
| Dynamic Impedance | 0.8Ω typical at 1mA; minimizes load-induced voltage shift in varying-current applications |
| Thermal Hysteresis | 0.08%; ensures repeatability after thermal cycling in field-deployed instrumentation |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92mm × 1.30mm footprint ideal for space-constrained PCB layouts in portable and modular industrial sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current/voltage input | Connected to regulated supply rail; sinks current to maintain 10V across anode–cathode |
| Anode (Pin 2) | Common ground reference | Typically tied to system ground; defines reference potential for output voltage |
| NC (Pin 3) | No internal connection | Must be left floating or connected to anode per EMI mitigation guidance in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor operation | Eliminates BOM cost and layout area for stabilization capacitors; simplifies design validation |
| Wide capacitive load immunity | Stable with >100nF load capacitance-enables direct driving of ADC reference inputs and op-amp buffers |
| Micropower minimum current | 45μA typical IZ,min enables battery-powered 10-year deployments in remote monitoring nodes |
| Fuse/Zener-zap trimming | Ensures grade-specific accuracy without post-package calibration; guarantees A-grade 0.1% tolerance at wafer sort |
| Extended temperature rating | Specified from –40°C to +85°C; qualified for industrial control cabinets and outdoor field enclosures |
Applications
| Industrial Data-Acquisition Systems | Energy Infrastructure Monitoring |
|---|---|
Use Scenario: High-resolution voltage measurement in PLC analog input modules sampling multiple 4–20mA loops. IC Role / Device Role / Timing Role: Primary 10V reference for 24-bit sigma-delta ADCs, ensuring consistent full-scale calibration across channels. Use Value: ±0.1% initial accuracy and 100ppm/°C drift maintain <0.01% total unadjusted error over temperature-meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Voltage reference in smart meter metrology ICs measuring grid voltage harmonics and RMS values. IC Role / Device Role / Timing Role: Stable 10V reference for anti-aliasing filter cutoff tuning and ADC gain calibration in Class 0.2 meters. Use Value: 35μVRMS noise prevents degradation of >90dB SNR in 16-bit metrology ADCs; low hysteresis ensures repeatable billing accuracy after thermal stress. |
| Analog Input Modules | Field Transmitters |
Use Scenario: Modular 8-channel analog input card for distributed control systems with isolated channel-to-channel references. IC Role / Device Role / Timing Role: Local 10V reference per channel to eliminate shared-reference crosstalk and ground-loop errors. Use Value: SOT-23-3 footprint allows per-channel placement; 45μA min current enables low-power isolation amplifier biasing without auxiliary supplies. | Use Scenario: Two-wire 4–20mA transmitter with HART modulation, where reference stability directly impacts loop accuracy. IC Role / Device Role / Timing Role: Precision 10V reference for DAC-based current loop setpoint generation and sensor excitation. Use Value: Thermal hysteresis ≤0.08% ensures <±10μA loop error after repeated ambient cycling-exceeding ISA-50.00.01 field instrument specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3010AIDBZR | 10V, ±0.2% initial accuracy, 50ppm/°C, 2.2μA quiescent current, 3.3V–5.5V supply-dependent operation | Requires clean bias supply; unsuitable for direct shunt configuration in high-side sensing | Select when ultra-low quiescent current dominates over shunt flexibility and absolute accuracy |
| ADR3410ARJZ-R7 | 10V, ±0.12% initial accuracy, 30ppm/°C, 120μA supply current, 3-pin SOT-23, active series topology | Higher minimum operating current; requires dedicated supply rail; not drop-in compatible | Select when lower tempco and better long-term stability outweigh shunt simplicity and micropower advantage |
Compared with REF3010AIDBZR and ADR3410ARJZ-R7, the LM4040A10IDBZR offers true two-terminal shunt operation with lowest minimum current (45μA), making it uniquely suitable for passive, supply-independent reference nodes in legacy 4–20mA loops and energy-harvesting sensor nodes-where alternatives require additional bias circuitry or compromise on accuracy vs. power trade-offs.
Availability
LM4040A10IDBZR is available at Aetrix Electronics and suitable for industrial data-acquisition systems, energy infrastructure monitoring, and field transmitter designs requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4040A10IDBZR 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 leadership in precision reference design and industrial-grade reliability.
The LM4040 series was engineered specifically for high-accuracy, low-drift, micropower shunt reference applications in industrial automation, test equipment, and process control-prioritizing ease of use, capacitor-free stability, and grade-scalable performance.
FAQ
What is the maximum operating temperature range for the LM4040A10IDBZR?
The LM4040A10IDBZR is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in control cabinets, outdoor enclosures, and factory-floor instrumentation without derating. The device maintains its ±0.1% initial accuracy and 100ppm/°C temperature coefficient across this full range, as verified in TI's LM4040A10I electrical characteristics tables.
Does the LM4040A10IDBZR require an external output capacitor?
No, the LM4040A10IDBZR does not require an external output capacitor. Its internal design ensures stability with all capacitive loads-including >100nF-and eliminates the need for external compensation components. This simplifies layout, reduces BOM count, and avoids capacitor-related aging or ESR effects that could degrade long-term reference stability in the LM4040A10IDBZR.
What is the minimum cathode current needed for regulation in the LM4040A10IDBZR?
The LM4040A10IDBZR requires a minimum cathode current of 45μA (typical) to maintain regulation. At 25°C, the specified IZ,min is 45μA with a maximum of 75μA across temperature; full-range spec is 80μA. This ultralow requirement enables use in battery-powered field sensors and energy-harvesting applications where the LM4040A10IDBZR delivers stable 10V reference voltage even under microampere load conditions.
How does the LM4040A10IDBZR compare to the LM4040B10IDBZR in accuracy and temperature coefficient?
The LM4040A10IDBZR provides ±0.1% initial accuracy and 100ppm/°C temperature coefficient, while the LM4040B10IDBZR offers ±0.2% initial accuracy with the same 100ppm/°C coefficient. Both share identical noise (35μVRMS), dynamic impedance (~0.8Ω), and operating current range. The LM4040A10IDBZR is selected when sub-100ppm absolute error is required across temperature-such as in 12-bit+ data acquisition where the LM4040A10IDBZR ensures <0.5 LSB error without calibration.
Can the LM4040A10IDBZR be used in a two-wire 4–20mA transmitter circuit?
Yes, the LM4040A10IDBZR is widely used in two-wire 4–20mA transmitters as a stable 10V shunt reference for DAC-based current loop control and sensor excitation. Its 45μA minimum current allows operation down to ~3.5mA loop current, and its thermal hysteresis of 0.08% ensures repeatable output after ambient cycling-critical for field instruments meeting ISA-50.00.01 accuracy requirements. The LM4040A10IDBZR's SOT-23-3 package also fits compact transmitter PCBs.
LM4040A10IDBZR 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:
- ±0.1%
- 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
LM4040A10IDBZR FAQ
1.How can I place an order for LM4040A10IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040A10IDBZR 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 LM4040A10IDBZR reliable?
The price and inventory of LM4040A10IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040A10IDBZR is usually 5 days.
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LM4040A10IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040A10IDBZR 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 LM4040A10IDBZR?
For technical support, including LM4040A10IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040A10IDBZR requirements.
6.How does Aetrix verify that LM4040A10IDBZR is sourced from the original manufacturer or authorized distributors?
All LM4040A10IDBZR 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 LM4040A10IDBZR meets industry standards.
7.What is the process for return or replacement of LM4040A10IDBZR?
All LM4040A10IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040A10IDBZR, 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 LM4040A10IDBZR part is unused and in its original packaging.
Return procedure for LM4040A10IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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