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Texas Instruments LM4040A10IDBZT
- Part No.:
- LM4040A10IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040A10IDBZT.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:152
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Product details
Overview
LM4040A10IDBZT 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 high-stability voltage reference in analog-to-digital converters and sensor signal conditioning circuits for industrial process transmitters.
For engineers reviewing the LM4040A10IDBZT datasheet, LM4040A10IDBZT pinout, LM4040A10IDBZT application, or LM4040A10IDBZT equivalent, key selection criteria include initial voltage tolerance, thermal drift over –40°C to 85°C, low-noise performance at microamp bias, and SOT-23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4040A10IDBZT 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 die achieves ±0.1% initial accuracy at 25°C and maintains stability via low dynamic impedance (0.8Ω typical) and minimal thermal hysteresis (0.08%).
Designed for direct replacement of legacy bandgap references, it requires no external capacitor, remains stable with all capacitive loads, and delivers consistent performance across its full operating current range (45μA–15mA) and industrial temperature range (–40°C to 85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.0V nominal; enables accurate scaling in 12-bit+ ADC systems requiring ≥10V reference rails |
| Initial Accuracy | ±0.1% at 25°C; supports high-precision calibration without post-manufacture trimming |
| Temp Coefficient | 100ppm/°C max; ensures ≤±0.75% total drift over –40°C to 85°C ambient |
| Output Noise | 35μVRMS (10Hz–10kHz); minimizes quantization error in low-noise data acquisition |
| Min Cathode Current | 45μA typical; allows ultra-low-power operation in battery-powered field instruments |
| Dynamic Impedance | 0.8Ω typical at 1mA; maintains regulation under fast load transients in PLC analog inputs |
| Operating Temp | –40°C to +85°C; qualified for industrial control cabinets and outdoor energy infrastructure |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, thermally efficient for high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated supply rail; sinks current to clamp voltage at 10.0V |
| Anode (Pin 2) | Common reference / ground return | Must be connected to system ground; establishes reference potential for feedback loop |
| NC (Pin 3) | No internal connection | Left floating per TI recommendation; not bonded internally in DBZ package |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 10V output | Eliminates external resistor divider errors and reduces BOM count in voltage-scaling circuits |
| Stable with all capacitive loads | Enables direct connection to ADC reference inputs without stability-compensating capacitors |
| Low 35μVRMS noise | Preserves ENOB in 16-bit SAR ADCs where reference noise dominates system SNR |
| 45μA min operating current | Supports <100μA system sleep modes in smart sensors and wireless field devices |
| –40°C to 85°C operation | Meets extended industrial temperature requirements for factory automation and grid monitoring |
Applications
| Process Transmitter Calibration | Industrial PLC Analog Input |
|---|---|
Use Scenario: Precision 4–20mA loop-powered transmitter calibrating sensor outputs against known voltage standards. IC Role / Device Role / Timing Role: Shunt voltage reference providing 10V excitation and ADC reference for ratiometric measurement. Use Value: ±0.1% initial accuracy and 100ppm/°C drift ensure calibration validity over full temperature range without recalibration. |
Use Scenario: Modular I/O card digitizing 0–10V industrial sensor signals in programmable logic controllers. IC Role / Device Role / Timing Role: Stable 10V reference for 16-bit sigma-delta ADC front-end, rejecting supply ripple. Use Value: 35μVRMS noise and 0.8Ω dynamic impedance prevent code flicker and improve effective resolution by ≥0.5 bits. |
| Energy Meter Reference | Portable Test Equipment |
Use Scenario: Revenue-grade electricity meter measuring voltage/current with metrology-grade ADCs. IC Role / Device Role / Timing Role: Primary voltage reference for anti-aliasing filter and ADC reference in Class 0.2 meters. Use Value: Long-term stability of 120ppm/1000h ensures annual calibration drift remains within ANSI C12.20 limits. |
Use Scenario: Handheld multimeter or portable oscilloscope requiring stable reference during battery operation. IC Role / Device Role / Timing Role: Low-current 10V reference enabling >200-hour battery life while maintaining 4½-digit accuracy. Use Value: 45μA minimum cathode current allows operation from coin-cell sources without efficiency penalty. |
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 | Series reference; requires 3.3V–5.5V supply; 10ppm/°C drift; 25μVRMS noise | Needs clean supply rail; unsuitable for shunt-based topologies or floating grounds | Select when supply voltage is stable and lower noise is critical; avoid in high-impedance or floating-sensor designs |
| ADR3410ARJZ-R7 | Series reference; 3.0V–15V supply; 20ppm/°C drift; 4.8μVRMS noise; higher quiescent current (120μA) | Requires external supply decoupling; incompatible with shunt-biased configurations | Choose for ultra-low-noise applications where board space permits series topology and supply headroom exists |
Compared with REF3010AIDBZR and ADR3410ARJZ-R7, the LM4040A10IDBZT offers true shunt operation with no supply dependency, lower minimum current, and proven robustness in noisy industrial environments-making it optimal for loop-powered transmitters and isolated analog inputs.
Availability
LM4040A10IDBZT is available at Aetrix Electronics and suitable for industrial process transmitters, PLC analog input modules, and energy metering systems requiring stable component supply with guaranteed long-term availability.
Supply support for LM4040A10IDBZT 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 voltage references and industrial-grade ICs.
The LM4040 family was engineered specifically for high-accuracy, low-power shunt reference applications in harsh industrial environments-emphasizing stability, noise performance, and ease of use without external components.
FAQ
What is the maximum cathode current rating for LM4040A10IDBZT?
The absolute maximum cathode current for LM4040A10IDBZT 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 LM4040A10IDBZT require an output capacitor for stability?
No, LM4040A10IDBZT is designed to be stable with all capacitive loads and does not require an output capacitor. TI explicitly states it remains stable "with all capacitive loads" and "no output capacitor required," making it ideal for direct connection to ADC reference pins or op-amp feedback networks.
What is the thermal hysteresis specification for LM4040A10IDBZT?
The thermal hysteresis of LM4040A10IDBZT is 0.08%, defined as the voltage difference measured at 25°C after cycling to –40°C versus after cycling to 125°C. This low hysteresis ensures repeatable reference performance during thermal cycling in field-deployed equipment.
Can LM4040A10IDBZT operate at 125°C ambient temperature?
No-LM4040A10IDBZT is rated for –40°C to +85°C ambient (industrial grade, suffix 'I'). For 125°C operation, TI specifies the LM4040A10QDBZR ('Q' suffix), which is characterized over –40°C to +125°C and uses the same DBZ package.
How does the 100ppm/°C temperature coefficient impact accuracy over temperature?
With a 100ppm/°C coefficient and 10V output, LM4040A10IDBZT drifts by ±1mV/°C. Over the full –40°C to +85°C range (ΔT = 125°C), total drift is ±125mV (±1.25%), but TI's overtemperature tolerance calculation yields ±0.75% (±75mV) due to statistical modeling-verified in Electrical Characteristics Table 6.21.
LM4040A10IDBZT 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
LM4040A10IDBZT FAQ
1.How can I place an order for LM4040A10IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040A10IDBZT 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 LM4040A10IDBZT reliable?
The price and inventory of LM4040A10IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040A10IDBZT is usually 5 days.
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Once your LM4040A10IDBZT 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 LM4040A10IDBZT?
For technical support, including LM4040A10IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040A10IDBZT requirements.
6.How does Aetrix verify that LM4040A10IDBZT is sourced from the original manufacturer or authorized distributors?
All LM4040A10IDBZT 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 LM4040A10IDBZT meets industry standards.
7.What is the process for return or replacement of LM4040A10IDBZT?
All LM4040A10IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4040A10IDBZT, 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 LM4040A10IDBZT part is unused and in its original packaging.
Return procedure for LM4040A10IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040A10IDBZT Tags
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TL431AIDBZR
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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