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Texas Instruments LM4040D30IDCKR
- Part No.:
- LM4040D30IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040D30IDCKR.pdf
- Description:
- IC VREF SHUNT 1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,893
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Product details
Overview
LM4040D30IDCKR from Texas Instruments is a precision micropower shunt voltage reference with 3.0V nominal output, ±1.0% initial accuracy (D grade), 150ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current. It serves as a compact, low-drift voltage reference in analog input modules and field transmitters requiring high stability over –40°C to 85°C.
For engineers reviewing the LM4040D30IDCKR datasheet, LM4040D30IDCKR pinout, LM4040D30IDCKR application, or LM4040D30IDCKR equivalent, this page delivers verified specifications, SC-70 package details, real-world use scenarios, and validated alternative options for industrial sensing and data-acquisition designs.
Technical Context
The LM4040D30IDCKR operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 3.0V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design achieves D-grade tolerance (±1.0% at 25°C) and supports operation over –40°C to 85°C without external capacitors.
It features low dynamic impedance (≤1.2Ω at 1mA), thermal hysteresis of 0.08%, and long-term stability of 120ppm after 1000 hours. The device draws only 45μA minimum cathode current, enabling use in battery-powered instrumentation where quiescent power is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal reverse breakdown voltage at IZ = 100μA - sets accurate bias point for ADCs and sensor signal chains |
| Initial Accuracy | ±1.0% maximum at 25°C (D grade) - enables single-point calibration in cost-sensitive industrial systems |
| Temp Coefficient | 150ppm/°C maximum - limits drift to ±0.12% over –40°C to 85°C ambient range |
| Min Cathode Current | 45μA typical - allows operation from ultra-low-power microcontrollers or energy-harvesting sources |
| Output Noise | 35μVRMS (10Hz–10kHz) - preserves SNR in 16-bit+ data acquisition front-ends |
| Dynamic Impedance | ≤1.2Ω at 1mA - ensures minimal load regulation error under varying sink current |
| Operating Temp | –40°C to +85°C - qualified for industrial control and process automation environments |
Pinout & Package
LM4040D30IDCKR is packaged in a 5-pin SC-70 (DCK) outline measuring 2.00mm × 1.25mm, optimized for space-constrained PCB layouts. The package includes two no-connect (NC) pins to support mechanical robustness and thermal isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 3) | Shunt current/voltage input | Primary terminal for sinking reference current; connects to regulated supply rail |
| Anode (Pin 1) | Common ground reference | Typically tied to system ground; forms return path for cathode current |
| NC (Pins 4, 5) | No internal connection | Must remain unconnected; improves thermal performance and EMI immunity when left floating |
| Pin 2* | Optional anode tie | May be connected to anode to reduce EMI sensitivity near switching noise sources |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | No output capacitor required - eliminates BOM cost and layout risk in compact sensor nodes |
| Low 35μVRMS noise | Enables <18-bit ENOB in precision SAR ADCs without external filtering |
| 45μA min operating current | Supports direct bias from low-leakage GPIOs or nano-power supervisors |
| 150ppm/°C tempco | Meets ±0.25% total error budget over full industrial temperature range |
| SC-70 footprint | Reduces board area by >50% vs. SOT-23 while maintaining thermal performance |
Applications
| Analog Input Module | Field Transmitter |
|---|---|
Use Scenario: High-channel-count PLC analog input card measuring 4–20mA loop signals with 16-bit resolution. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for ADC driver and PGA gain-setting resistors. Use Value: ±1.0% initial accuracy and 150ppm/°C tempco ensure <±0.3% total measurement error across –25°C to 70°C cabinet temperatures. |
Use Scenario: Loop-powered 2-wire pressure transmitter operating from 4–20mA supply with onboard signal conditioning. IC Role / Device Role / Timing Role: Supplies precision 3.0V reference for bridge sensor excitation and sigma-delta ADC conversion. Use Value: 45μA minimum cathode current enables reliable startup even at 3.5V loop voltage, extending low-end measurement range. |
| Data-Acquisition System | Energy Infrastructure |
Use Scenario: Portable handheld multimeter with auto-ranging, true RMS, and battery operation. IC Role / Device Role / Timing Role: Reference source for dual-slope integrator and auto-zero amplifier stages. Use Value: 35μVRMS noise prevents digitization artifacts in sub-mV measurements; SC-70 package saves space in compact enclosure. |
Use Scenario: Smart electricity meter monitoring voltage, current, and power quality on 3-phase distribution lines. IC Role / Device Role / Timing Role: Supplies stable 3.0V reference for metrology-grade ADCs sampling at 8–16kSPS. Use Value: Long-term stability of 120ppm/1000h ensures calibration validity over 10-year field life without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C30IDCKR | ±0.5% initial accuracy, 100ppm/°C tempco - tighter tolerance but higher cost | Better suited for 18-bit DAQ or metrology where ±0.1% total error is required | Select when long-term stability and lower drift outweigh cost sensitivity |
| TLVH431ACDBVR | Adjustable 1.24V–18V output, ±0.5% accuracy, 30ppm/°C - programmable but requires two external resistors | Used where reference voltage must be tuned per channel or calibrated in-system | Choose when flexibility in output voltage outweighs fixed-voltage simplicity and board area |
Compared with LM4040C30IDCKR, the LM4040D30IDCKR trades 0.5% accuracy for lower unit cost and identical SC-70 packaging; versus TLVH431ACDBVR, it eliminates resistor network complexity and saves 0.5mm² PCB area but fixes output at 3.0V.
Availability
LM4040D30IDCKR is available at Aetrix Electronics and suitable for analog input modules, field transmitters, and portable data-acquisition systems requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for LM4040D30IDCKR 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 industrial-grade reliability.
The LM4040 series was developed specifically for high-accuracy, low-power shunt reference applications in industrial sensing, process control, and portable instrumentation-prioritizing stability, noise performance, and ease of use over programmability.
FAQ
What is the maximum cathode current rating for LM4040D30IDCKR?
The absolute maximum cathode current for LM4040D30IDCKR is 25mA, per TI's Absolute Maximum Ratings table. However, the recommended operating range is 45μA to 15mA. Exceeding 15mA may increase self-heating and degrade long-term stability; sustained operation above 20mA risks exceeding the 150°C junction temperature limit.
Does LM4040D30IDCKR require an output capacitor for stability?
No, LM4040D30IDCKR is inherently 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 capacitance has no adverse effect but provides no benefit-simplifying layout and reducing BOM count in space-constrained designs.
What is the thermal hysteresis specification for LM4040D30IDCKR?
LM4040D30IDCKR exhibits 0.08% thermal hysteresis, defined as the voltage difference measured at 25°C after cycling between –40°C and +125°C. This value is consistent across all LM4040 grades and package variants, including LM4040D30IDCKR, and contributes predictably to total error budgets in cyclic temperature environments.
Can LM4040D30IDCKR be used in automotive applications?
LM4040D30IDCKR is rated for –40°C to +85°C operation and is not AEC-Q200 qualified. While it may function in some non-safety-critical automotive cabin environments, TI does not specify or guarantee performance under automotive qualification stress tests. For automotive use, consider the LM4040-Q1 series, which is explicitly qualified and tested to AEC-Q100 standards.
How does the 150ppm/°C temperature coefficient affect LM4040D30IDCKR output over its full temperature range?
Over the –40°C to +85°C range (ΔT = 125°C), LM4040D30IDCKR's 150ppm/°C coefficient contributes up to ±0.1875% (125 × 150ppm) additional error beyond initial tolerance. Combined with its ±1.0% initial accuracy, total voltage deviation remains within ±1.1875% - well within typical industrial sensor interface requirements.
LM4040D30IDCKR 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 82 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4040D30IDCKR FAQ
1.How can I place an order for LM4040D30IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D30IDCKR 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 LM4040D30IDCKR reliable?
The price and inventory of LM4040D30IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D30IDCKR is usually 5 days.
3.What payment methods are accepted for LM4040D30IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D30IDCKR transactions.
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4.How is shipping managed for LM4040D30IDCKR?
LM4040D30IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D30IDCKR 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 LM4040D30IDCKR?
For technical support, including LM4040D30IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D30IDCKR requirements.
6.How does Aetrix verify that LM4040D30IDCKR is sourced from the original manufacturer or authorized distributors?
All LM4040D30IDCKR 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 LM4040D30IDCKR meets industry standards.
7.What is the process for return or replacement of LM4040D30IDCKR?
All LM4040D30IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D30IDCKR, 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 LM4040D30IDCKR part is unused and in its original packaging.
Return procedure for LM4040D30IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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