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Texas Instruments LM4040C10IDCKR
- Part No.:
- LM4040C10IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040C10IDCKR.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,057
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Product details
Overview
LM4040C10IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.5% initial accuracy (C grade), 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current. It serves as a low-drift, low-noise voltage reference in high-accuracy analog signal chains for industrial sensing and data acquisition.
For engineers reviewing the LM4040C10IDCKR datasheet, LM4040C10IDCKR pinout, LM4040C10IDCKR application, or LM4040C10IDCKR equivalent, key selection criteria include its SC-70-5 package footprint, –40°C to 85°C operating range, no-output-capacitor-required stability, and compatibility with capacitive loads across portable and space-constrained systems.
Technical Context
The LM4040C10IDCKR operates as a two-terminal shunt reference, sinking cathode current (IZ) to regulate voltage across its anode–cathode terminals. Its Zener-zap trimmed reverse breakdown voltage ensures tight initial tolerance, while low dynamic impedance (≤0.9Ω at 1mA) and low thermal hysteresis (0.08%) maintain stability over temperature cycling and load transients.
Designed for direct replacement of legacy bandgap references, it requires no external components, supports all capacitive loads without oscillation, and achieves long-term stability of 120ppm after 1000 hours at 25°C - enabling reliable calibration retention in field-deployed instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal; enables precise scaling in 12-bit+ ADCs and DACs requiring stable full-scale reference |
| Initial Accuracy | ±0.5% at 25°C; guarantees ≤±50mV absolute error before temperature or aging effects |
| Temp Coefficient | 100ppm/°C max; contributes ≤±8.5mV drift over –40°C to 85°C ambient range |
| Output Noise | 35μVRMS (10Hz–10kHz); minimizes added noise floor in high-resolution measurement front-ends |
| Min Cathode Current | 45μA typical; allows ultra-low-power operation in battery-powered sensor nodes |
| Dynamic Impedance | 0.9Ω max at 1mA; ensures minimal output voltage shift under varying load currents |
| Operating Temp | –40°C to +85°C; qualified for industrial control and factory automation environments |
Pinout & Package
LM4040C10IDCKR is packaged in a 5-pin SC-70 (DCK) outline measuring 2.00mm × 1.25mm, optimized for high-density PCB layouts. The package includes two no-connect (NC) pins to support pin-compatible variants and reduce crosstalk in mixed-signal designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 3) | Shunt current input | Current sink node; connects to supply rail via series resistor to establish regulated 10V at anode |
| Anode (Pin 1) | Reference output / ground reference | Provides stable 10V relative to system ground; must be tied to GND or low-impedance return path |
| NC (Pins 4, 5) | No internal connection | Unused; may remain unconnected or grounded per layout best practices for noise immunity |
| Pin 2 (*) | Internal Zener substrate tap | Must float or connect to anode; grounding improves EMI rejection near switching noise sources |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output capacitor - reduces BOM count and board area in compact designs |
| Low 35μVRMS noise | Preserves SNR in 16-bit+ data converters without requiring external filtering |
| 45μA minimum operating current | Enables use in energy-harvesting and coin-cell-powered applications with microamp-level budgets |
| 0.08% thermal hysteresis | Ensures repeatable voltage output after thermal cycling - critical for recalibration-free field instruments |
| Zener-zap voltage trim | Delivers graded accuracy (A/B/C/D) without laser trimming - improves cost-performance scalability |
Applications
| Industrial Data Acquisition | Energy Infrastructure Monitoring |
|---|---|
Use Scenario: High-accuracy voltage measurement in DIN-rail-mounted PLC analog input modules sampling 4–20mA sensor loops. IC Role / Device Role / Timing Role: Shunt reference providing 10V full-scale reference for 24-bit ΣΔ ADCs driving isolated current-to-digital conversion. Use Value: ±0.5% initial tolerance and 100ppm/°C TC ensure <0.1% total error over full industrial temperature range without recalibration. | Use Scenario: Voltage supervision and metering in smart grid distribution transformers and substation RTUs. IC Role / Device Role / Timing Role: Precision reference for anti-tampering voltage monitoring circuits detecting undervoltage/overvoltage events. Use Value: Low 35μVRMS noise prevents false triggering in high-EMI transformer environments; SC-70 package fits constrained meter PCBs. |
| Field Transmitter Calibration | Automotive Battery Management |
Use Scenario: Portable handheld calibrators used to verify 4–20mA loop-powered pressure and temperature transmitters in oil & gas facilities. IC Role / Device Role / Timing Role: Stable 10V reference source for generating traceable test currents during field verification. Use Value: 45μA min current enables >1-year operation on AA batteries; thermal hysteresis <0.08% ensures repeatability across daily temperature swings. | Use Scenario: Cell voltage reference in 12S Li-ion BMS units for EV charging stations and fleet telematics gateways. IC Role / Device Role / Timing Role: Reference for multiplexed 16-bit SAR ADC measuring individual cell voltages with <1mV resolution. Use Value: Stable performance from –40°C to 85°C matches automotive under-hood ambient requirements; no capacitor needed simplifies safety-critical layout. |
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% accuracy, but SOT-23-3 package (3-pin) and higher 50μVRMS noise | Lacks NC pins; less EMI robustness in noisy environments due to missing substrate tap pin | Preferred when board space is extremely limited and noise margin >15μVRMS is acceptable |
| REF3010AIDBZR | 10V series reference; requires 50μA supply current, 65ppm/°C TC, 42μVRMS noise | 3-pin SOT-23; needs output capacitor; not shunt-configurable - incompatible with existing shunt topologies | Only suitable for new designs where series architecture and higher quiescent current are acceptable |
Compared with TL4050C10IDBZR, LM4040C10IDCKR offers lower noise and EMI-hardened pinout; compared with REF3010AIDBZR, it retains shunt topology compatibility and eliminates output capacitance - critical for retrofitting legacy analog input designs.
Availability
LM4040C10IDCKR is available at Aetrix Electronics and suitable for industrial data acquisition, energy infrastructure monitoring, and field transmitter calibration requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040C10IDCKR 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.
The LM4040 family was engineered specifically for high-accuracy, low-power shunt reference applications in industrial, test & measurement, and portable instrumentation - prioritizing stability, noise performance, and ease of use over legacy discrete Zener solutions.
FAQ
What is the maximum cathode current rating for LM4040C10IDCKR?
The absolute maximum cathode current for LM4040C10IDCKR is 25mA, per TI's Absolute Maximum Ratings. However, the recommended operating range is 45μA to 15mA - exceeding 15mA risks thermal overload in the SC-70 package unless board-level heatsinking is implemented. Continuous operation above 15mA should be validated with junction temperature calculations using RθJA = 252°C/W.
Does LM4040C10IDCKR require an output capacitor for stability?
No, LM4040C10IDCKR is explicitly designed to be stable with all capacitive loads and does not require an output capacitor. This is confirmed in the device description and "Features" section of the datasheet. Adding a capacitor may degrade transient response but will not cause oscillation - making it ideal for space-constrained or low-BOM-count applications like portable calibrators.
What is the purpose of Pin 2 (*) on LM4040C10IDCKR?
Pin 2 (*) on LM4040C10IDCKR is an internal Zener substrate tap. Per TI's Pin Functions table, it must either float or be connected to the anode (Pin 1). TI recommends connecting it to the anode in high-EMI environments - such as near switch-mode power supplies or motor drives - to improve noise immunity and reduce susceptibility to high-frequency interference affecting reference accuracy.
How does the 100ppm/°C temperature coefficient translate to actual voltage drift over temperature?
With a 10V nominal output and 100ppm/°C max temperature coefficient, LM4040C10IDCKR exhibits ≤±0.85mV/°C drift. Over its full operating range (–40°C to +85°C, ΔT = 125°C), maximum drift is ±10.6mV - i.e., output remains within 9.989V to 10.011V across temperature, assuming initial ±0.5% tolerance is centered. This is verified in Section 6.22's electrical characteristics tables.
Is LM4040C10IDCKR suitable for automotive applications requiring AEC-Q200 qualification?
No, LM4040C10IDCKR is not AEC-Q200 qualified. It is specified for the industrial temperature range (–40°C to +85°C) and carries the "I" suffix (LM4040C10I), not the automotive "Q" variant (e.g., LM4040C10Q). For automotive BMS or body control modules, the LM4040C10Q - qualified per AEC-Q200 and rated for –40°C to +125°C - must be used instead.
LM4040C10IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- ±0.5%
- 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:
- SC-70-5
LM4040C10IDCKR FAQ
1.How can I place an order for LM4040C10IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040C10IDCKR 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 LM4040C10IDCKR reliable?
The price and inventory of LM4040C10IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040C10IDCKR is usually 5 days.
3.What payment methods are accepted for LM4040C10IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040C10IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040C10IDCKR?
LM4040C10IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040C10IDCKR 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 LM4040C10IDCKR?
For technical support, including LM4040C10IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040C10IDCKR requirements.
6.How does Aetrix verify that LM4040C10IDCKR is sourced from the original manufacturer or authorized distributors?
All LM4040C10IDCKR 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 LM4040C10IDCKR meets industry standards.
7.What is the process for return or replacement of LM4040C10IDCKR?
All LM4040C10IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040C10IDCKR, 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 LM4040C10IDCKR part is unused and in its original packaging.
Return procedure for LM4040C10IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040C10IDCKR Tags
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