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Texas Instruments LM4040A30IDCKR
- Part No.:
- LM4040A30IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040A30IDCKR.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,828
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Product details
Overview
LM4040A30IDCKR from Texas Instruments is a precision micropower shunt voltage reference with 3.0V nominal output, ±3mV (0.1%) initial tolerance at 25°C, 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 reference in high-accuracy analog signal chains for industrial sensing and data acquisition.
For engineers reviewing the LM4040A30IDCKR datasheet, LM4040A30IDCKR pinout, LM4040A30IDCKR application, or LM4040A30IDCKR equivalent, key selection criteria include initial accuracy, thermal stability over –40°C to 85°C, dynamic impedance under varying load current, noise performance in precision ADC biasing, and compatibility with capacitive loads without external compensation.
Technical Context
The LM4040A30IDCKR uses Zener-zap trimming during wafer sort to achieve 0.1% initial accuracy and maintains tight regulation via low dynamic impedance (0.4Ω typical at 1mA) and low thermal hysteresis (0.08%). Its two-terminal shunt architecture requires no external components and operates across full industrial temperature range.
It delivers stable 3.0V reference voltage with minimal drift-±22mV total tolerance over –40°C to 85°C-and supports ultra-low-power systems with 47μA minimum cathode current. The device's wide operating current range enables use in both high-precision instrumentation and battery-powered portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal at IZ = 100μA; fixed value, no adjustment required |
| Initial Tolerance | ±3mV (0.1%) at 25°C; enables high-accuracy system calibration without trimming |
| Temp Coefficient | 100ppm/°C max over –40°C to 85°C; ensures <±0.22V drift across full range |
| Noise (10Hz–10kHz) | 35μVRMS typical; critical for low-noise ADC reference and sensor excitation |
| Min Cathode Current | 47μA typical; supports ultra-low-power operation in energy-harvesting systems |
| Dynamic Impedance | 0.4Ω typical at 1mA; minimizes output voltage shift under load transients |
| Long-Term Stability | 120ppm after 1000 hours; ensures consistent reference performance over product lifetime |
Pinout & Package
LM4040A30IDCKR is packaged in a 5-pin SC-70 (DCK) package measuring 2.00mm × 1.25mm. This space-saving surface-mount package supports high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 3) | Shunt current input / voltage reference node | Connects to regulated supply rail; sinks current to maintain 3.0V at this node |
| Anode (Pin 1) | Common return / ground reference | Typically tied to system ground; forms reference potential for cathode voltage |
| NC (Pins 4, 5) | No internal connection | Must remain unconnected; no electrical function or internal tie |
| Pin 2 | Must float or connect to anode | Used only in high-EMI environments; ties internal guard ring to ground for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | No external capacitor required-enables direct connection to ADC reference inputs or op-amp feedback networks |
| Low 35μVRMS noise | Reduces quantization uncertainty in 16-bit+ SAR and delta-sigma ADCs |
| 47μA min operating current | Supports operation from microcontroller GPIOs or low-quiescent LDOs in portable systems |
| 0.08% thermal hysteresis | Ensures repeatable voltage after thermal cycling-critical for field-deployed instrumentation |
| 100ppm/°C tempco | Maintains sub-0.5 LSB error in 12-bit systems across industrial temperature range |
Applications
| Industrial Data Acquisition | Energy Infrastructure Monitoring |
|---|---|
Use Scenario: High-resolution voltage measurement in DIN-rail mounted PLC analog input modules. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for 24-bit delta-sigma ADCs sampling current/voltage sensors. Use Value: Enables ±0.005% full-scale accuracy over –40°C to 85°C without recalibration. |
Use Scenario: Battery voltage monitoring and grid-edge power quality analyzers. IC Role / Device Role / Timing Role: Serves as precision reference for isolated sigma-delta modulators feeding FPGA-based metering ASICs. Use Value: Delivers 35μVRMS noise floor compatible with Class 0.2 revenue-grade metering standards. |
| Field Transmitter Calibration | Automotive Sensor Signal Conditioning |
Use Scenario: 4–20mA loop-powered pressure and temperature transmitters. IC Role / Device Role / Timing Role: Supplies stable excitation and reference for bridge sensor interfaces and DAC-controlled current loops. Use Value: 0.1% initial tolerance and 100ppm/°C tempco meet ISA-S77.01 transmitter accuracy requirements. |
Use Scenario: Cabin air quality sensors and battery cell voltage monitors in EV BMS subsystems. IC Role / Device Role / Timing Role: References 12-bit SAR ADCs measuring thermistor and shunt-based signals. Use Value: 47μA min current allows operation from low-power automotive PMIC rails with no startup delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0V, 0.2% initial accuracy, 50ppm/°C tempco, 3.6V to 5.5V supply required (active series topology) | Requires external supply; not a drop-in replacement due to 3-pin series architecture vs. 2-pin shunt | Select when lower tempco and higher PSRR are prioritized over simplicity and zero-supply operation |
| ADR3430ARJZ-R7 | 3.0V, 0.1% initial accuracy, 30ppm/°C tempco, 3.0V to 15V supply required, 4.5μA quiescent current | Active series reference with tighter tempco but needs supply rail and decoupling; incompatible pinout | Choose for ultra-stable references in battery-backed systems where supply headroom exists |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, LM4040A30IDCKR offers true two-terminal simplicity, zero external components, and guaranteed operation down to 47μA-making it optimal for space-constrained, supply-limited, or cost-sensitive shunt reference applications where 100ppm/°C stability suffices.
Availability
LM4040A30IDCKR is available at Aetrix Electronics and suitable for industrial data acquisition, energy infrastructure monitoring, and field transmitter applications requiring stable component supply, long-term calibration integrity, and extended temperature operation.
Supply support for LM4040A30IDCKR 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 analog ICs and voltage references.
The LM4040 family was designed specifically for high-accuracy, low-power shunt reference applications in industrial, test & measurement, and portable instrumentation-emphasizing simplicity, stability, and ease of integration.
FAQ
What is the operating temperature range for LM4040A30IDCKR?
The LM4040A30IDCKR is characterized for operation across –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in factory automation, outdoor metering, and transportation electronics without derating or external thermal management.
Does LM4040A30IDCKR require an output capacitor?
No, LM4040A30IDCKR is stable with all capacitive loads and does not require an external output capacitor. Its two-terminal shunt architecture eliminates the need for compensation components-reducing BOM count and PCB area while simplifying layout.
How does the 0.1% initial tolerance of LM4040A30IDCKR translate to absolute voltage error?
At 25°C and IZ = 100μA, LM4040A30IDCKR guarantees a reverse breakdown voltage between 2.997V and 3.003V. This ±3mV absolute error enables single-point calibration in 12-bit systems and reduces post-manufacturing trim steps.
Can LM4040A30IDCKR be used in battery-powered applications?
Yes-LM4040A30IDCKR draws as little as 47μA typical minimum cathode current, making it ideal for coin-cell or energy-harvesting systems. Its ability to regulate accurately at microamp currents supports always-on sensor nodes and low-duty-cycle wireless transceivers.
What is the purpose of Pin 2 on the LM4040A30IDCKR SC-70 package?
Pin 2 on LM4040A30IDCKR is a guard ring terminal intended for high-EMI environments. TI recommends connecting it to the anode (Pin 1) when placed near transformers or switching regulators to reduce noise coupling into the reference node-improving long-term stability and noise immunity.
LM4040A30IDCKR 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:
- ±0.1%
- 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
LM4040A30IDCKR FAQ
1.How can I place an order for LM4040A30IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040A30IDCKR 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 LM4040A30IDCKR reliable?
The price and inventory of LM4040A30IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040A30IDCKR is usually 5 days.
3.What payment methods are accepted for LM4040A30IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040A30IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040A30IDCKR?
LM4040A30IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040A30IDCKR 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 LM4040A30IDCKR?
For technical support, including LM4040A30IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040A30IDCKR requirements.
6.How does Aetrix verify that LM4040A30IDCKR is sourced from the original manufacturer or authorized distributors?
All LM4040A30IDCKR 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 LM4040A30IDCKR meets industry standards.
7.What is the process for return or replacement of LM4040A30IDCKR?
All LM4040A30IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040A30IDCKR, 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 LM4040A30IDCKR part is unused and in its original packaging.
Return procedure for LM4040A30IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040A30IDCKR Tags
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TL431AIDBZR
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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AZ431LBNTR-G1
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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