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Texas Instruments LM4040DEM3-3.0/NOPB
- Part No.:
- LM4040DEM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,694
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Product details
Overview
LM4040DEM3-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 3.0 V reverse breakdown voltage with ±0.2% initial tolerance (Grade D), 100 ppm/°C max temperature coefficient, and 35 μVRMS wideband noise (10 Hz–10 kHz). It operates from 62 μA to 15 mA over −40°C to +125°C, enabling stable biasing in automotive sensor signal chains and industrial data acquisition front-ends.
For engineers reviewing the LM4040DEM3-3.0/NOPB datasheet, LM4040DEM3-3.0/NOPB pinout, LM4040DEM3-3.0/NOPB application, or LM4040DEM3-3.0/NOPB equivalent, key selection criteria include its Grade D accuracy at extended temperature, no-output-capacitor requirement, capacitive-load tolerance, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4040DEM3-3.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.2% initial voltage accuracy at 25°C. Its bandgap-derived curvature-compensated Zener core ensures low thermal drift across −40°C to +125°C operation.
It functions as a two-terminal shunt reference: cathode accepts input current and delivers regulated 3.0 V at cathode-to-anode potential; anode is grounded. Dynamic impedance is 1.1 Ω at 1 mA, supporting stable regulation under varying load currents from 62 μA to 15 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and non-adjustable - sets precise bias point for ADC references or op-amp feedback networks. |
| Initial Tolerance | ±0.2% at 25°C (Grade D) - corresponds to ±6 mV absolute error, suitable for 12-bit system accuracy without calibration. |
| Temp Coefficient | ≤100 ppm/°C max - contributes ≤±30 mV drift over −40°C to +125°C span, critical for automotive under-hood stability. |
| Operating Current | 62 μA min to 15 mA max - supports ultra-low-power sensor nodes and high-current analog stages with single-part flexibility. |
| Output Noise | 35 μVRMS (10 Hz–10 kHz) - enables high-resolution data acquisition without added filtering overhead. |
| Dynamic Impedance | 1.1 Ω at 1 mA - ensures minimal output voltage shift under dynamic load transients in closed-loop systems. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 0.95 mm height, gull-wing leads. RoHS-compliant, lead-free, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Input/Output node | Accepts shunt current; regulated 3.0 V appears between Cathode and Anode - connects to supply rail or divider network input. |
| Anode (Pin 2) | Reference ground | Must be connected to system ground; defines 0 V reference for output voltage - floating anode disables regulation. |
| NC (Pin 3) | No-connect | Internally unconnected; must remain unconnected on PCB - tieing to Anode may reduce EMI susceptibility per TI recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation without output bypass capacitor - reduces BOM count and board area in compact designs. |
| Capacitive load tolerance | Remains stable with any value of capacitive load - eliminates risk of oscillation when driving ADC sample capacitors or long traces. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications from −40°C to +125°C ambient - meets reliability requirements for engine control and ADAS modules. |
| Low micropower operation | 62 μA minimum operating current - enables battery-powered field transmitters with multi-year runtime. |
Applications
| Automotive Sensor Biasing | Industrial Data Acquisition |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) and pressure sensors in engine control units. IC Role / Device Role / Timing Role: Shunt reference establishing precise 3.0 V bias point for ratiometric sensor measurement circuits. Use Value: Grade D tolerance and 100 ppm/°C TC ensure <±0.1% total error over full automotive temperature range, eliminating need for per-unit calibration. | Use Scenario: Serving as reference for 16-bit SAR ADCs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Two-terminal shunt voltage source replacing bulkier series references to minimize layout area and thermal coupling. Use Value: 35 μVRMS noise and 1.1 Ω dynamic impedance maintain ENOB >15 bits without external filtering or guard rings. |
| Energy Infrastructure Monitoring | Field Transmitter Signal Conditioning |
Use Scenario: Calibrating voltage and current sensing in solar inverter DC-link monitoring circuits. IC Role / Device Role / Timing Role: Precision shunt reference for isolated sigma-delta modulator biasing in high-voltage measurement subsystems. Use Value: AEC-Q100 qualification and 15 mA max current rating support robust operation in harsh grid-tied environments with wide thermal cycling. | Use Scenario: Generating stable 3.0 V reference for 4–20 mA loop-powered transmitter ICs in hazardous-area process instrumentation. IC Role / Device Role / Timing Role: Micropower shunt reference enabling operation from <100 μA loop current while maintaining accuracy. Use Value: 62 μA minimum operating current allows full functionality even at lowest loop current, preserving diagnostic capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-3.0/NOPB | ±0.5% initial tolerance (Grade C), same 3.0 V, SOT-23-3 package | Lower accuracy; suited for cost-sensitive industrial controls where 12-bit system accuracy suffices | Select when tighter tolerance is unnecessary and BOM cost reduction is prioritized over long-term stability. |
| TLVH431IDBVR | Adjustable 1.24–18 V output via resistor divider; 0.5% initial tolerance; 3-pin SOT-23 | Requires external resistors; higher quiescent current (80 μA min); not AEC-Q100 qualified | Choose for flexible voltage setting in non-automotive applications where design reuse across multiple reference voltages is needed. |
Compared with LM4040CIM3-3.0/NOPB and TLVH431IDBVR, the LM4040DEM3-3.0/NOPB uniquely combines Grade D accuracy, AEC-Q100 Grade 1 qualification, and zero-output-capacitor operation - making it optimal for automotive and high-reliability industrial systems requiring guaranteed 3.0 V with minimal layout overhead.
Availability
LM4040DEM3-3.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and energy infrastructure monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040DEM3-3.0/NOPB 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
The LM4040-N product line delivers micropower shunt voltage references optimized for space-constrained, high-stability applications including automotive sensing, industrial automation, and portable instrumentation - emphasizing accuracy, low noise, and extended temperature operation.
FAQ
What is the maximum operating temperature range for the LM4040DEM3-3.0/NOPB?
The LM4040DEM3-3.0/NOPB is rated for operation from −40°C to +125°C ambient temperature (AEC-Q100 Grade 1). This extended range is validated per automotive reliability standards and supports under-hood and industrial control cabinet deployments where thermal stress is significant. The device maintains specified electrical characteristics-including ±0.2% initial tolerance and ≤100 ppm/°C temperature coefficient-across this full span.
Does the LM4040DEM3-3.0/NOPB require an external output capacitor?
No, the LM4040DEM3-3.0/NOPB does not require an external output capacitor for stability. Its internal architecture is designed to remain stable with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates a common BOM item and simplifies layout-especially valuable in space-constrained applications like automotive ECUs and handheld test equipment.
What is the minimum operating current for the LM4040DEM3-3.0/NOPB at 3.0 V output?
The LM4040DEM3-3.0/NOPB requires a minimum operating current of 62 μA at 25°C to maintain regulation at its nominal 3.0 V output. This value increases slightly over temperature, reaching 68 μA at −40°C to +125°C extremes. This micropower capability enables use in battery-operated field transmitters and low-power IoT sensor nodes where supply current budgets are tightly constrained.
Is the LM4040DEM3-3.0/NOPB pin-compatible with other LM4040 variants in SOT-23-3?
Yes, the LM4040DEM3-3.0/NOPB shares identical SOT-23-3 (DBZ) pinout and mechanical footprint with all other LM4040-N and LM4040-N-Q1 variants offered in that package-including LM4040AIM3-3.0/NOPB, LM4040CIM3-3.0/NOPB, and LM4040QDEM3-3.0/NOPB. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC. This allows drop-in replacement across accuracy grades without PCB redesign.
How does the LM4040DEM3-3.0/NOPB achieve its low temperature coefficient?
The LM4040DEM3-3.0/NOPB achieves ≤100 ppm/°C max temperature coefficient through bandgap reference temperature drift curvature correction integrated into its Zener-zap trimmed shunt core. This compensation counteracts the inherent parabolic drift of Zener diodes, resulting in linearized voltage vs. temperature behavior across −40°C to +125°C. Measured thermal hysteresis is only 0.08%, further ensuring repeatability after thermal cycling.
LM4040DEM3-3.0/NOPB 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:
- 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:
- 75 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3-3.0/NOPB FAQ
1.How can I place an order for LM4040DEM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-3.0/NOPB 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 LM4040DEM3-3.0/NOPB reliable?
The price and inventory of LM4040DEM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-3.0/NOPB?
LM4040DEM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-3.0/NOPB 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 LM4040DEM3-3.0/NOPB?
For technical support, including LM4040DEM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040DEM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-3.0/NOPB 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 LM4040DEM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-3.0/NOPB?
All LM4040DEM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-3.0/NOPB, 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 LM4040DEM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DEM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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