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Texas Instruments LM4040B30IDCKR
- Part No.:
- LM4040B30IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040B30IDCKR.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,028
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Product details
Overview
LM4040B30IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 3.0V output with ±0.2% initial accuracy (B grade), 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 47μA to 15mA cathode current. It serves as a low-drift, low-noise voltage基准 in high-resolution ADCs, sensor signal conditioning, and industrial analog input modules.
For engineers reviewing the LM4040B30IDCKR datasheet, LM4040B30IDCKR pinout, LM4040B30IDCKR application, or LM4040B30IDCKR equivalent, key selection criteria include its SC-70-5 package, –40°C to 85°C operating range, no-output-capacitor requirement, and verified performance across cathode current and temperature extremes.
Technical Context
The LM4040B30IDCKR operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 3.0V reverse breakdown voltage (VZ) across its terminals. Its Zener-zap trimmed bandgap core ensures tight initial tolerance and low thermal drift, while its low dynamic impedance (0.4Ω typical at 1mA) sustains regulation under varying load conditions.
Designed for space-constrained portable and industrial systems, it requires no external capacitor and remains stable with all capacitive loads. Its SC-70-5 package includes two NC pins (4 and 5), enabling layout flexibility and EMI mitigation via optional anode tie of pin 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal; enables direct biasing of 3V ADC references and analog front-ends without scaling. |
| Initial Accuracy | ±0.2% max at 25°C; supports 12-bit system accuracy without calibration. |
| Temp Coefficient | 100ppm/°C max; contributes ≤±0.65% error over –40°C to 85°C ambient range. |
| Noise (10Hz–10kHz) | 35μVRMS typical; minimizes quantization uncertainty in 16-bit+ data acquisition. |
| Min Cathode Current | 47μA typical; allows ultra-low-power operation in battery-powered sensors. |
| Dynamic Impedance | 0.4Ω typical at 1mA; maintains <1mV output shift under 1mA load transients. |
| Operating Temp Range | –40°C to +85°C; qualified for industrial control and field transmitter environments. |
Pinout & Package
LM4040B30IDCKR 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 mechanical stability and EMI reduction strategies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 3) | Shunt current input / voltage sense node | Connects to regulated supply rail; sinks current to clamp voltage at 3.0V. |
| Anode (Pin 1) | Common reference terminal | Typically tied to system ground; forms return path for cathode current. |
| Pin 2 | Must float or connect to anode | Used for EMI suppression in noisy environments; not internally connected otherwise. |
| NC (Pin 4) | No internal connection | Left unconnected; may be grounded for mechanical reinforcement only. |
| NC (Pin 5) | No internal connection | Left unconnected; provides additional thermal relief and solder joint margin. |
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 precision measurement chains, especially with sigma-delta ADCs. |
| 47μA minimum operating current | Enables use in always-on sensor nodes with sub-100μA system quiescent budgets. |
| Zener-zap voltage trim | Ensures ±0.2% initial accuracy without post-package calibration or sorting. |
| Thermal hysteresis ≤0.08% | Guarantees repeatable voltage after thermal cycling-critical for field-deployed instrumentation. |
Applications
| Data-Acquisition Systems | Analog Input Module |
|---|---|
Use Scenario: High-resolution (16–24-bit) ADC reference in PLC analog input cards. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.0V reference for SAR and sigma-delta ADCs. Use Value: ±0.2% initial accuracy and 100ppm/°C drift ensure full-scale error stays within 0.1% over industrial temperature range. | Use Scenario: Signal conditioning front-end for 4–20mA loop-powered sensors. IC Role / Device Role / Timing Role: Precision bias source for op-amp gain stages and ADC reference buffers. Use Value: 35μVRMS noise prevents degradation of effective resolution below 18 bits in low-frequency measurements. |
| Energy Infrastructure | Field Transmitters |
Use Scenario: Voltage reference in smart meter metrology ICs and anti-tampering monitoring circuits. IC Role / Device Role / Timing Role: Stable reference for energy measurement ASICs and tamper-detection comparators. Use Value: Long-term stability of 120ppm over 1000 hours ensures meter calibration validity across multi-year deployments. | Use Scenario: Two-wire 4–20mA transmitter with HART modulation capability. IC Role / Device Role / Timing Role: Low-current shunt reference powering internal regulators and DACs. Use Value: 47μA min cathode current allows reliable start-up and regulation even under lowest loop current conditions (≤3.5mA). |
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, same 100ppm/°C tempco, identical SC-70-5 package | Acceptable where 12-bit system accuracy suffices; lower cost | Select when tighter initial tolerance is unnecessary and BOM cost optimization is prioritized. |
| REF3030AIDBZR | 3.0V series reference, ±0.2% accuracy, 50ppm/°C tempco, SOT-23-3 package, 50μA IQ | Requires input headroom; not a drop-in replacement due to topology and pinout difference | Choose for lower tempco and better PSRR where supply margin permits series topology. |
Compared with LM4040C30IDCKR, the LM4040B30IDCKR delivers twice the initial accuracy at minimal cost premium; versus REF3030AIDBZR, it offers shunt simplicity and zero headroom requirement but trades off 50ppm/°C vs. 100ppm/°C drift.
Availability
LM4040B30IDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, analog input modules, and field transmitters requiring stable component supply with guaranteed long-term manufacturability and consistent electrical binning.
Supply support for LM4040B30IDCKR 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, embedded processing, and power management technologies with decades of precision reference design heritage.
The LM4040 family was engineered for high-accuracy, low-power shunt referencing in industrial, energy, and instrumentation systems-prioritizing stability, noise performance, and ease of use over wide current and temperature ranges.
FAQ
What is the maximum cathode current rating for LM4040B30IDCKR?
The absolute maximum cathode current for LM4040B30IDCKR is 25mA per TI's Absolute Maximum Ratings. However, the recommended operating range is 47μA to 15mA; operation above 15mA increases self-heating and may degrade long-term stability and temperature coefficient performance unless thermal management is implemented.
Does LM4040B30IDCKR require an output capacitor?
No, LM4040B30IDCKR is inherently stable with all capacitive loads and does not require an output capacitor for regulation. This eliminates a common BOM item and simplifies layout-especially beneficial in space-constrained SC-70 designs where capacitor placement near the device is impractical.
What is the function of Pin 2 on LM4040B30IDCKR?
Pin 2 on LM4040B30IDCKR must either float or be connected to the anode (Pin 1). It is not internally connected but serves as an EMI mitigation node; TI recommends tying it to the anode in high-noise environments (e.g., near transformers or switching regulators) to reduce susceptibility to electromagnetic interference.
How does LM4040B30IDCKR compare to the A-grade version LM4040A30IDCKR?
LM4040B30IDCKR offers ±0.2% initial accuracy and 100ppm/°C temperature coefficient, while LM4040A30IDCKR provides tighter ±0.1% accuracy with the same tempco. Both share identical SC-70-5 packaging, noise (35μVRMS), and operating current range. The A-grade variant is selected when 13-bit+ system accuracy is required without calibration.
Is LM4040B30IDCKR suitable for automotive applications?
LM4040B30IDCKR is rated for –40°C to +85°C operation and is not AEC-Q200 qualified. For automotive applications requiring extended temperature support (–40°C to +125°C) or qualification, TI's LM4040B30IQDBZR (Q-grade) or alternative automotive-qualified shunt references should be used instead of LM4040B30IDCKR.
LM4040B30IDCKR 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:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°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
LM4040B30IDCKR FAQ
1.How can I place an order for LM4040B30IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040B30IDCKR 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 LM4040B30IDCKR reliable?
The price and inventory of LM4040B30IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040B30IDCKR is usually 5 days.
3.What payment methods are accepted for LM4040B30IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040B30IDCKR transactions.
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4.How is shipping managed for LM4040B30IDCKR?
LM4040B30IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040B30IDCKR 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 LM4040B30IDCKR?
For technical support, including LM4040B30IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040B30IDCKR requirements.
6.How does Aetrix verify that LM4040B30IDCKR is sourced from the original manufacturer or authorized distributors?
All LM4040B30IDCKR 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 LM4040B30IDCKR meets industry standards.
7.What is the process for return or replacement of LM4040B30IDCKR?
All LM4040B30IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040B30IDCKR, 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 LM4040B30IDCKR part is unused and in its original packaging.
Return procedure for LM4040B30IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040B30IDCKR Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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