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Texas Instruments LM4040DEM3-2.0/NOPB
- Part No.:
- LM4040DEM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:355
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Product details
Overview
LM4040DEM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 2.048 V reverse breakdown voltage with ±20 mV (±0.98%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 65 μA to 15 mA over −40°C to +125°C and requires no output capacitor-used for ADC/DAC biasing, sensor excitation, and automotive analog signal conditioning.
For engineers reviewing the LM4040DEM3-2.0/NOPB datasheet, LM4040DEM3-2.0/NOPB pinout, LM4040DEM3-2.0/NOPB application, or LM4040DEM3-2.0/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade thermal performance, and two rigorously cross-referenced alternative parts for design-in decisions under extended temperature and low-noise constraints.
Technical Context
The LM4040DEM3-2.0/NOPB implements a Zener-zap trimmed bandgap-shunt architecture with curvature-corrected temperature drift compensation, enabling stable 2.048 V reference output across −40°C to +125°C without external capacitors. Its low dynamic impedance (≤1.1 Ω at 1 mA) and capacitive-load tolerance simplify layout in space-constrained industrial and automotive modules.
Designed for AEC-Q100 Grade 1 compliance, it supports extended-temperature operation with verified long-term stability (120 ppm after 1000 hrs) and thermal hysteresis of ≤0.08%-critical for field transmitters and energy infrastructure metering where calibration integrity must persist across thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage-enables precise 12-bit ADC full-scale alignment with binary-friendly scaling (e.g., 2.048 V = 1 LSB × 212). |
| Initial Tolerance | ±20 mV (±0.98%) at 25°C-supports high-accuracy analog front-ends without post-manufacturing trimming. |
| Temp Coefficient | ≤100 ppm/°C max-limits voltage drift to ±10.2 mV over −40°C to +125°C ambient, ensuring <0.5% total error in extended-range systems. |
| Operating Current | 65 μA min to 15 mA max-allows ultra-low-power sensor nodes (<100 μA sleep mode) and robust current-sink capability for noisy power rails. |
| Output Noise | 35 μVrms (10 Hz–10 kHz)-preserves SNR in 16-bit data acquisition without additional filtering. |
| Thermal Hysteresis | ≤0.08%-ensures repeatable voltage output after thermal cycling between −40°C and +125°C, critical for field-deployed instrumentation. |
| Long-Term Stability | 120 ppm after 1000 hrs-guarantees minimal calibration drift in sealed automotive ECUs and smart grid sensors. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178 compatible. Thermal resistance RθJA = 291.9°C/W (board-mounted).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Shunt current input / reference output node | Connects to regulated supply rail; sinks all load and error current-must be decoupled locally when driving ADC reference inputs. |
| 2 (Anode) | Ground reference terminal | Typically tied to system ground; provides return path for cathode current-floating anode invalidates regulation. |
| 3 (NC) | No-connect terminal | Internally unconnected; must remain floating or tied to pin 2 per TI layout guidance to suppress EMI-induced errors near transformers or SMPS. |
Key Features
| Feature | Design Value |
|---|---|
| Zener-zap voltage trim | Ensures ±20 mV initial accuracy without laser trimming-reduces manufacturing cost while maintaining AEC-Q100 Grade 1 compliance. |
| Capacitive-load tolerance | Stable operation with >1 μF ceramic output capacitance-eliminates need for series isolation resistor in noisy environments like motor drives. |
| No external capacitor required | Enables direct connection to SAR ADC reference pins without stability-compensation networks-reduces BOM count and PCB area in compact modules. |
| Extended temperature range | Full specification over −40°C to +125°C ambient-validated for under-hood automotive applications and outdoor energy infrastructure deployments. |
| Low quiescent current | 65 μA minimum operating current-supports battery-powered field transmitters with multi-year operational life on coin cells. |
Applications
| Field Transmitters | Automotive Sensor Modules |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter in oil & gas wellheads. IC Role / Device Role / Timing Role: Shunt reference for DAC output stage and ADC input scaling, establishing precise 2.048 V full-scale range. Use Value: Enables 12-bit measurement resolution with <±0.1% total error over −40°C to +85°C, meeting ISA-S50.1 accuracy requirements. |
Use Scenario: Tire pressure monitoring system (TPMS) ECU with integrated MEMS pressure sensor and RF transceiver. IC Role / Device Role / Timing Role: Stable bias reference for sensor signal conditioning amplifier and ADC reference in AEC-Q100 qualified module. Use Value: Maintains <±0.2% reference error across −40°C to +125°C thermal cycling, ensuring reliable pressure reporting during cold starts and highway operation. |
| Energy Infrastructure Meters | Industrial Analog Input Modules |
Use Scenario: Revenue-grade electricity meter with polyphase voltage/current sensing and metrology SoC. IC Role / Device Role / Timing Role: Primary shunt reference for metrology ADCs and isolated voltage dividers in Class 0.2 accuracy meters. Use Value: Delivers 120 ppm long-term stability and ≤0.08% thermal hysteresis-meets IEC 62053-22 long-term calibration retention requirements. |
Use Scenario: DIN-rail mounted PLC analog input card accepting 0–10 V, ±5 V, and 4–20 mA signals. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifiers and 16-bit sigma-delta ADCs. Use Value: 35 μVrms noise and ≤1.1 Ω dynamic impedance preserve SNR >95 dB, enabling true 16-bit effective resolution in factory automation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C20IDBZR | 2.048 V, ±0.5% initial tolerance (±10.2 mV), 75 ppm/°C max tempco, SOT-23 package. | Lower accuracy grade; not AEC-Q100 qualified-suitable for industrial but not automotive Grade 1 designs. | Select when cost sensitivity outweighs Grade 1 qualification and ±0.5% tolerance suffices for 10-bit systems. |
| MAX6002EUR+T | 2.048 V, ±0.2% initial tolerance (±4.1 mV), 50 ppm/°C max tempco, SOT-23 package, 60 μA min current. | Higher initial accuracy and lower tempco-but rated only to +85°C ambient, not +125°C. | Choose for high-precision non-automotive applications requiring tighter tolerance and lower drift, with relaxed temperature range. |
Compared with TL4050C20IDBZR and MAX6002EUR+T, the LM4040DEM3-2.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 2.048 V binary-aligned output, and verified −40°C to +125°C operation-making it the only option among the three for under-hood automotive sensor references requiring both extended temperature and production traceability.
Availability
LM4040DEM3-2.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, automotive sensor modules, and energy infrastructure meters requiring stable component supply with full AEC-Q100 documentation and lot-level traceability.
Supply support for LM4040DEM3-2.0/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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and automotive qualification.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, high-stability applications in automotive, industrial, and energy infrastructure-designed to replace bulkier series references while maintaining sub-1% total error over temperature.
FAQ
What is the maximum operating temperature range for the LM4040DEM3-2.0/NOPB?
The LM4040DEM3-2.0/NOPB is specified for operation from −40°C to +125°C ambient temperature and is AEC-Q100 Grade 1 qualified. This extended range is validated across all electrical parameters-including reverse breakdown voltage tolerance, temperature coefficient, and long-term stability-making it suitable for under-hood automotive and outdoor industrial deployments where junction temperatures may exceed +105°C.
Does the LM4040DEM3-2.0/NOPB require an external output capacitor?
No, the LM4040DEM3-2.0/NOPB does not require an external output capacitor due to its internally compensated shunt architecture. It remains stable with any capacitive load up to at least 1 μF, eliminating the need for series isolation resistors or stability networks-simplifying layout in compact analog signal chains and reducing BOM count.
What is the minimum cathode current needed for regulation in the LM4040DEM3-2.0/NOPB?
The LM4040DEM3-2.0/NOPB requires a minimum cathode current of 65 μA at 25°C and 68 μA across the full −40°C to +125°C range to maintain regulation within specification. This low minimum current enables use in ultra-low-power applications such as battery-backed field transmitters and wireless sensor nodes.
How does the LM4040DEM3-2.0/NOPB achieve its 2.048 V output voltage?
The LM4040DEM3-2.0/NOPB achieves its precise 2.048 V output via Zener-zap trimming during wafer sort, combined with bandgap reference temperature drift curvature correction. This process ensures the device meets its ±20 mV initial tolerance and ≤100 ppm/°C temperature coefficient without post-package adjustment or external components.
Is the LM4040DEM3-2.0/NOPB pin-compatible with other LM4040 variants in SOT-23?
Yes, all LM4040-N variants in the SOT-23 (DBZ) package-including LM4040DEM3-2.0/NOPB, LM4040AIM3-2.5/NOPB, and LM4040CIM3-5.0/NOPB-share identical pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. This allows drop-in replacement across voltage grades and tolerance grades within the same package footprint.
LM4040DEM3-2.0/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):
- 2.048V
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3-2.0/NOPB FAQ
1.How can I place an order for LM4040DEM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-2.0/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 LM4040DEM3-2.0/NOPB reliable?
The price and inventory of LM4040DEM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-2.0/NOPB?
LM4040DEM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-2.0/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 LM4040DEM3-2.0/NOPB?
For technical support, including LM4040DEM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040DEM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-2.0/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 LM4040DEM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-2.0/NOPB?
All LM4040DEM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-2.0/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 LM4040DEM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DEM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DEM3-2.0/NOPB Tags
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