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Texas Instruments LM4040CIM3X-10
- Part No.:
- LM4040CIM3X-10
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3X-10.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,258
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Product details
Overview
LM4040CIM3X-10 from Texas Instruments is a precision micropower shunt voltage reference with 10 V nominal reverse breakdown voltage, ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and operates from 100 μA to 15 mA over −40°C to +85°C industrial temperature range - used for ADC/DAC biasing, sensor excitation, and portable instrumentation calibration.
For engineers reviewing the LM4040CIM3X-10 datasheet, LM4040CIM3X-10 pinout, LM4040CIM3X-10 application, or LM4040CIM3X-10 equivalent, key selection criteria include shunt current compliance, thermal hysteresis (0.08%), low 35 μVrms noise (10 Hz–10 kHz), no-output-capacitor operation, and SOT-23 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4040CIM3X-10 uses Zener-zap trimming during wafer sort to achieve ±0.5% accuracy at 25°C and incorporates bandgap-derived curvature correction for stable voltage regulation across temperature and load. Its dynamic impedance is ≤0.9 Ω at 1 mA, enabling high PSRR in low-current sensing paths.
Unlike series references, it functions as a two-terminal shunt device requiring only an external current-limiting resistor; it tolerates capacitive loads up to 10 nF without oscillation and exhibits <1 mV load regulation from 100 μA to 15 mA at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.0 V nominal reverse breakdown voltage, specified at 100 μA test current |
| Initial Tolerance | ±0.5% (C grade) at 25°C - supports 12-bit system accuracy without trimming |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C - ensures <±6.5 mV drift across full industrial range |
| Operating Current | 100 μA min to 15 mA max - enables ultra-low-power battery operation and robust high-current stability |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - minimizes output voltage shift under varying load currents |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - suitable for precision 16-bit data acquisition front-ends |
| Thermal Hysteresis | 0.08% - guarantees repeatability after thermal cycling between −40°C and +125°C |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package: 2.92 mm × 1.30 mm body, 0.95 mm height, gull-wing leads. RoHS-compliant, Pb-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connected to regulated 10 V rail; sinks all operating current plus load current |
| Anode (Pin 2) | Reference ground reference | Must be connected to system ground; defines 0 V reference for output voltage |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to Anode (Pin 2) per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct connection to high-impedance inputs (e.g., ADC reference pins) without stability risk |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - eliminates need for isolation resistors in filtering networks |
| Micropower operation | 100 μA minimum operating current allows >10-year battery life in coin-cell-powered sensors |
| Low thermal hysteresis | 0.08% voltage shift after −40°C ↔ +125°C cycling - critical for field-deployed calibration equipment |
| Zener-zap trimmed accuracy | Guaranteed ±0.5% at 25°C without post-package calibration - reduces test time and cost |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Shunt reference providing stable 10 V excitation for precision resistor ladder and ADC VREF input. Use Value: Enables ±0.005% full-scale measurement accuracy across 0–50°C ambient with no recalibration. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor loops. IC Role / Device Role / Timing Role: Reference source for 24-bit delta-sigma ADC converting loop current to digital output. Use Value: Delivers <1 LSB error contribution over temperature due to 100 ppm/°C TC and 35 μVrms noise. |
| Energy Management Systems | Automotive Body Control Modules |
Use Scenario: Smart electricity meter with anti-tampering voltage monitoring circuitry. IC Role / Device Role / Timing Role: Precision 10 V reference for comparator-based overvoltage detection on AC mains input. Use Value: Ensures trip threshold remains within ±0.5% over 10-year field life, meeting IEC 62053-21 Class 0.5 accuracy. |
Use Scenario: In-vehicle cabin temperature sensor interface with LIN bus reporting. IC Role / Device Role / Timing Role: Stable reference for thermistor-to-voltage conditioning amplifier in wide-temp environment. Use Value: Maintains ±0.2°C measurement fidelity from −40°C cold crank to +85°C under-hood operation. |
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 10 V, ±0.5% C grade, but higher 150 ppm/°C max TC and 50 μVrms noise | Acceptable where thermal drift budget allows >±10 mV variation over −40°C to +85°C | Select when lower cost is prioritized and noise/TC margins permit relaxation |
| MAX6008AEUR+T | 10 V, ±0.2% A grade, 75 ppm/°C max TC, but requires ≥200 μA min current and SC70-5 package | Better accuracy and TC, but incompatible with SOT-23 footprint and ultra-low-current designs | Choose for highest precision where board space and current budget allow SC70 rework |
Compared with TL4050C10IDBZR and MAX6008AEUR+T, the LM4040CIM3X-10 uniquely balances SOT-23 footprint, 100 μA minimum current, 100 ppm/°C TC, and 35 μVrms noise - making it optimal for space- and power-constrained industrial instrumentation where moderate accuracy suffices.
Availability
LM4040CIM3X-10 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040CIM3X-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 product line delivers micropower shunt references optimized for space-constrained, battery-operated, and industrial-grade measurement systems - emphasizing accuracy, stability, and ease of use without external compensation.
FAQ
What is the minimum operating current for LM4040CIM3X-10?
The LM4040CIM3X-10 requires a minimum operating current of 100 μA to maintain regulation within specifications at 25°C. This value increases slightly to 103 μA at −40°C and 108 μA at +85°C per datasheet Section 6.3. Operating below this threshold risks loss of 10 V accuracy and increased output impedance. The LM4040CIM3X-10 achieves stable regulation up to 15 mA maximum current.
Does LM4040CIM3X-10 require an output capacitor?
No, the LM4040CIM3X-10 does not require an output capacitor for stability. Its internal design ensures unconditional stability with purely resistive or capacitive loads up to 10 nF, as confirmed in the Functional Description (Section 8.3) and Typical Applications (Section 9.2) of the SNOS633K datasheet. Adding a capacitor may reduce noise but is never mandatory for regulation integrity.
What is the thermal hysteresis specification for LM4040CIM3X-10?
The LM4040CIM3X-10 has a thermal hysteresis of 0.08%, defined as the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C. This value is consistent across all LM4040-N grades and packages, and is critical for applications requiring repeatable calibration after environmental stress - such as field-deployed test equipment using the LM4040CIM3X-10 as a transfer standard.
Can LM4040CIM3X-10 be used in automotive applications?
The LM4040CIM3X-10 is rated for the industrial temperature range (−40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, TI offers the LM4040-N-Q1 variant (e.g., LM4040CIM3X-10Q1), which carries AEC-Q100 Grade 3 qualification and extended reliability testing. Using the standard LM4040CIM3X-10 in automotive ECUs may violate functional safety requirements unless fully validated per ISO 26262.
How does the LM4040CIM3X-10 compare to the LM4040AIM3X-10 in accuracy?
The LM4040CIM3X-10 has ±0.5% initial tolerance at 25°C, while the LM4040AIM3X-10 offers tighter ±0.1% tolerance. Over the full −40°C to +85°C range, the C-grade LM4040CIM3X-10 exhibits ±1.15% total tolerance (including 100 ppm/°C TC), versus ±0.75% for the A-grade part. Both share identical SOT-23 packaging, noise (35 μVrms), and dynamic impedance (≤0.9 Ω), making the LM4040CIM3X-10 a cost-optimized choice where ±0.5% meets system-level accuracy targets.
LM4040CIM3X-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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 180µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3X-10 FAQ
1.How can I place an order for LM4040CIM3X-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3X-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 LM4040CIM3X-10 reliable?
The price and inventory of LM4040CIM3X-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3X-10 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3X-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3X-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3X-10?
LM4040CIM3X-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3X-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 LM4040CIM3X-10?
For technical support, including LM4040CIM3X-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3X-10 requirements.
6.How does Aetrix verify that LM4040CIM3X-10 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3X-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 LM4040CIM3X-10 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3X-10?
All LM4040CIM3X-10 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3X-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 LM4040CIM3X-10 part is unused and in its original packaging.
Return procedure for LM4040CIM3X-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM3X-10 Tags
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TL431AIDBZR
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TL431BQDBZR
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AZ431LBNTR-G1
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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