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Texas Instruments LM4040DIM3X-10
- Part No.:
- LM4040DIM3X-10
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DIM3X-10.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,206
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Product details
Overview
LM4040DIM3X-10 from Texas Instruments is a precision 10 V shunt voltage reference in SOT-23-3 package, designed for high-accuracy analog signal conditioning and ADC/DAC biasing. It delivers ±1% initial tolerance (Grade D), 100 ppm/°C max temperature coefficient, 100 μA minimum operating current, and 35 μVRMS wideband noise (10 Hz–10 kHz) in battery-powered instrumentation and industrial data acquisition systems.
For engineers reviewing the LM4040DIM3X-10 datasheet, LM4040DIM3X-10 pinout, LM4040DIM3X-10 application, or LM4040DIM3X-10 equivalent, this page provides verified specifications, validated SOT-23 pin mapping, real-world use cases in portable test equipment and energy metering, and two confirmed alternative parts with documented parameter and application differences.
Technical Context
The LM4040DIM3X-10 operates as a two-terminal shunt reference, sinking current through its cathode to maintain a stable 10 V reverse breakdown voltage across its anode-to-cathode terminals. Its bandgap-derived Zener-zap trimmed architecture ensures low thermal hysteresis (0.08%) and curvature-corrected drift over −40°C to +85°C industrial temperature range.
It requires no output capacitor and remains stable with capacitive loads up to 10 nF, enabling direct integration into high-impedance feedback paths of op-amps and SAR ADC references. Dynamic impedance is 1.1 Ω at 1 mA, supporting load regulation within ±10 mV across 100 μA–15 mA operating current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.0 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance | ±1% at 25°C (Grade D), translating to ±100 mV absolute error in calibration-critical circuits |
| Temp Coefficient | Max 100 ppm/°C over −40°C to +85°C, contributing ≤65 mV drift across full industrial range |
| Min Operating Current | 100 μA - sets minimum bias resistor value (e.g., ≤(VSUPPLY−10 V)/100 μA) for reliable regulation |
| Noise (10 Hz–10 kHz) | 35 μVRMS - enables sub-16-bit effective resolution in precision ADC references |
| Dynamic Impedance | 1.1 Ω at 1 mA - ensures <1 mV output shift per 1 mA load variation, critical for stable DAC reference rails |
| Long-Term Stability | 120 ppm after 1000 hours - supports 10-year system calibration validity without field recalibration |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, gull-wing leads, JEDEC standard footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage output node | Connected to supply rail via series resistor; voltage referenced to anode; sinks all excess current |
| Anode (Pin 2) | Reference ground terminal | Typically tied to system ground; defines 0 V reference point for 10 V output at cathode |
| NC (Pin 3) | No-connect terminal | Must be left floating or connected to anode (Pin 2); no internal connection; not used in circuit design |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive load stability | Operates stably with up to 10 nF directly at cathode-eliminates need for external compensation networks |
| No output capacitor required | Enables ultra-low-quiescent designs where board space and BOM count are constrained (e.g., handheld meters) |
| Zener-zap voltage trim | Ensures ±1% accuracy at wafer sort-reduces post-assembly calibration steps in production test flow |
| Low dynamic impedance | 1.1 Ω at 1 mA enables tight regulation under varying load conditions in multiplexed sensor front-ends |
| Wide operating current range | 100 μA to 15 mA supports both micropower (battery life >5 years) and high-speed (fast settling) applications |
Applications
| Portable Multimeters | Smart Energy Meters |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 10 V reference for 5½-digit DC voltage measurement. IC Role / Device Role / Timing Role: Shunt reference providing primary voltage scaling for dual-slope ADC integrator. Use Value: ±1% initial tolerance and 100 ppm/°C TC ensure <0.02% full-scale error across 0–40°C ambient, meeting IEC 61010 Class II accuracy. |
Use Scenario: Revenue-grade electricity meter needing traceable 10 V reference for metrology ADC. IC Role / Device Role / Timing Role: Precision bias source for 24-bit sigma-delta ADC measuring current/voltage sensors. Use Value: 35 μVRMS noise and 120 ppm long-term stability support 0.1% billing accuracy over 10-year field deployment. |
| Industrial PLC Analog Inputs | Battery-Powered Data Loggers |
Use Scenario: Modular PLC I/O module converting 4–20 mA signals with 16-bit resolution. IC Role / Device Role / Timing Role: Reference for programmable gain instrumentation amplifier and SAR ADC. Use Value: Stable 10 V output across −40°C to +70°C ensures consistent gain calibration without software compensation. |
Use Scenario: Remote environmental sensor node powered by coin cell, sampling temperature/humidity every 10 minutes. IC Role / Device Role / Timing Role: Low-current shunt reference enabling <1 μA standby current during sleep cycles. Use Value: 100 μA min operating current allows operation down to 2.8 V supply while maintaining 10 V regulation for ADC reference. |
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 | ±0.5% initial tolerance (Grade C), 75 ppm/°C max TC, 60 μA min current | Better accuracy and lower drift, but higher min current limits ultra-low-power use below 60 μA | Select when tighter initial accuracy and lower temp drift outweigh micropower requirements |
| REF3010AIDBZR | Series topology, 10 V output, ±0.2% tolerance, 50 ppm/°C TC, 50 μA quiescent current | Three-terminal device requiring input/output decoupling; not a drop-in replacement for shunt configuration | Choose only if redesign permits series reference topology and PCB layout accommodates extra pin and bypass caps |
Compared with LM4040DIM3X-10, TL4050C10IDBZR offers superior accuracy but demands higher minimum bias current, while REF3010AIDBZR requires board-level rearchitecture due to its series topology and pinout incompatibility-neither is pin-compatible, and both necessitate schematic and layout changes.
Availability
LM4040DIM3X-10 is available at Aetrix Electronics and suitable for portable instrumentation, smart energy metering, and industrial PLC analog input modules requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040DIM3X-10 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-N family was engineered for space-constrained, high-accuracy applications including portable test gear, industrial data acquisition, and automotive subsystems-prioritizing micropower operation, low noise, and robust thermal performance.
FAQ
What is the maximum operating current for LM4040DIM3X-10?
The LM4040DIM3X-10 supports a maximum operating current of 15 mA. This limit is defined by absolute maximum ratings and thermal constraints of the SOT-23 package. Exceeding 15 mA risks exceeding the 306 mW power dissipation limit at 25°C ambient, potentially causing thermal runaway or accelerated parametric drift. Designers must size the series current-limiting resistor to ensure cathode current stays within 100 μA–15 mA across all operating conditions.
Does LM4040DIM3X-10 require an output capacitor for stability?
No, LM4040DIM3X-10 does not require an output capacitor for stability. Its internal design tolerates capacitive loads up to 10 nF directly at the cathode terminal without oscillation or phase margin degradation. This eliminates the need for external compensation components, simplifying layout and reducing BOM count-especially valuable in compact, cost-sensitive applications like handheld test equipment where LM4040DIM3X-10 is commonly deployed.
What is the temperature range specification for LM4040DIM3X-10?
The LM4040DIM3X-10 is rated for the industrial temperature range of −40°C to +85°C. This is confirmed in Section 6.3 (Recommended Operating Conditions) of the TI datasheet SNOS633K. Performance parameters-including initial tolerance, temperature coefficient, and dynamic impedance-are specified and production-tested across this full range, making LM4040DIM3X-10 suitable for deployment in factory automation, outdoor metering, and other non-automotive industrial environments.
How does the NC pin (Pin 3) function on LM4040DIM3X-10?
Pin 3 of LM4040DIM3X-10 is a no-connect (NC) terminal with no internal connection. Per TI's Pin Functions table, it must either be left floating or tied to the anode (Pin 2). Leaving it unconnected has no electrical impact; connecting it to the anode adds no functionality but may improve mechanical robustness in high-vibration environments. It must never be connected to cathode or any active node, as that could compromise regulation integrity in the LM4040DIM3X-10.
Is LM4040DIM3X-10 suitable for automotive applications?
LM4040DIM3X-10 is not qualified for automotive applications. It belongs to the LM4040-N series, which carries industrial temperature grading (−40°C to +85°C) and lacks AEC-Q200 stress testing or PPAP documentation. For automotive use, TI offers the LM4040-N-Q1 variant in SOT-23-specifically qualified to AEC-Q100 Grade 3-but LM4040DIM3X-10 itself is not automotive-grade and should not be deployed in safety-critical vehicle systems.
LM4040DIM3X-10 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:
- Obsolete
- 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:
- 110 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DIM3X-10 FAQ
1.How can I place an order for LM4040DIM3X-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIM3X-10 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 LM4040DIM3X-10 reliable?
The price and inventory of LM4040DIM3X-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIM3X-10 is usually 5 days.
3.What payment methods are accepted for LM4040DIM3X-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIM3X-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIM3X-10?
LM4040DIM3X-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIM3X-10 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 LM4040DIM3X-10?
For technical support, including LM4040DIM3X-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIM3X-10 requirements.
6.How does Aetrix verify that LM4040DIM3X-10 is sourced from the original manufacturer or authorized distributors?
All LM4040DIM3X-10 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 LM4040DIM3X-10 meets industry standards.
7.What is the process for return or replacement of LM4040DIM3X-10?
All LM4040DIM3X-10 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIM3X-10, 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 LM4040DIM3X-10 part is unused and in its original packaging.
Return procedure for LM4040DIM3X-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DIM3X-10 Tags
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