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Texas Instruments LM4040DIM3-2.0/NOPB
- Part No.:
- LM4040DIM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DIM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:22,137
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Product details
Overview
LM4040DIM3-2.0/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 (±1.0%) 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 +85°C and requires no output capacitor.
For engineers reviewing the LM4040DIM3-2.0/NOPB datasheet, LM4040DIM3-2.0/NOPB pinout, LM4040DIM3-2.0/NOPB application, or LM4040DIM3-2.0/NOPB equivalent, this device serves as a stable, low-noise, space-efficient reference for analog signal conditioning, sensor excitation, and data acquisition systems where tight voltage accuracy and thermal stability are critical.
Technical Context
The LM4040DIM3-2.0/NOPB uses Zener-zap trimming during wafer sort to achieve its ±1.0% (Grade D) initial accuracy. Its bandgap-corrected temperature drift curvature ensures stable output across industrial temperature range without external compensation.
Designed as a two-terminal shunt reference, it sinks current through the cathode while maintaining precise reverse breakdown voltage at the anode–cathode junction. It tolerates capacitive loads and exhibits low dynamic impedance (≤1.1 Ω at 1 mA), enabling stable regulation even with varying load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - provides exact binary-scaled reference for 12-bit ADCs and DACs. |
| Initial Tolerance | ±20 mV (±1.0%) at 25°C - Grade D specification enables cost-optimized precision without A-grade premium. |
| Temp Coefficient | ≤100 ppm/°C - ensures ≤±0.13% voltage shift over −40°C to +85°C, critical for field transmitter accuracy. |
| Operating Current | 65 μA to 15 mA - ultra-low minimum current supports battery-powered sensors; high max current allows driving heavier loads. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - low noise preserves SNR in precision analog front-ends and instrumentation amplifiers. |
| Thermal Hysteresis | 0.08% - minimal voltage memory effect after thermal cycling improves long-term measurement repeatability. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AA compliant. Thermal resistance RθJA = 291.9°C/W (board mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current input and regulated output node - connects to supply rail via series resistor; voltage referenced to anode. |
| Anode (Pin 2) | O | Ground reference terminal - must be connected to system ground or low-impedance return path for stable regulation. |
| NC (Pin 3) | - | No-connect terminal - left floating or tied to anode per TI recommendation for EMI-sensitive layouts. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-component reference design in space-constrained PCBs without stability risk. |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or filtering networks without oscillation. |
| Zener-zap voltage trim | Ensures production-grade ±1.0% accuracy without post-package calibration or sorting. |
| Low dynamic impedance | ≤1.1 Ω at 1 mA - minimizes load-induced voltage droop in varying-current applications. |
| Wide operating current range | 65 μA min current enables micro-power operation; 15 mA max supports active circuit biasing. |
Applications
| Industrial Field Transmitter | Energy Infrastructure Monitoring |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter with onboard ADC and microcontroller. IC Role / Device Role / Timing Role: Shunt voltage reference for ADC full-scale calibration and sensor bridge excitation. Use Value: 2.048 V output matches 12-bit ADC resolution (212 = 4096); ±1.0% tolerance and 100 ppm/°C TC ensure <±0.25% total error over industrial temperature range. |
Use Scenario: Smart meter voltage sensing and isolation amplifier reference in grid-edge monitoring units. IC Role / Device Role / Timing Role: Precision reference for isolated sigma-delta ADC measuring AC mains voltage. Use Value: 35 μVrms noise prevents degradation of 0.1% energy measurement accuracy; SOT-23 footprint saves space on high-density meter PCBs. |
| Analog Input Module | Automotive Body Control Unit |
Use Scenario: Modular PLC I/O card with multiple 16-bit analog input channels. IC Role / Device Role / Timing Role: Per-channel reference for multiplexed SAR ADCs in multi-range input stages. Use Value: Low 65 μA minimum current allows shared biasing across channels; NC pin flexibility simplifies EMI mitigation in noisy factory environments. |
Use Scenario: Cabin ambient sensor cluster (humidity, CO₂, light) in 12 V automotive body control module. IC Role / Device Role / Timing Role: Stable reference for ratiometric sensor signal conditioning under wide supply variation. Use Value: Operates reliably from 65 μA to 15 mA - accommodates variable sensor drive requirements while maintaining <±0.3% total error across −40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-2.0/NOPB | ±10 mV (±0.5%) initial tolerance, same 2.048 V output and SOT-23 package | Better accuracy for higher-end instrumentation; identical thermal and noise specs | Select when tighter initial tolerance justifies cost increase; same layout and drive capability. |
| TLVH431ACDBVR | Adjustable 1.24–18 V output, 3-pin adjustable shunt regulator, 2% initial tolerance at 2.5 V setting | Requires external resistors; higher 80 μVrms noise and 150 ppm/°C TC limit precision use | Choose only if voltage programmability is required; not drop-in - redesign needed for feedback network and layout. |
Compared with LM4040CIM3-2.0/NOPB, the LM4040DIM3-2.0/NOPB trades ±0.5% accuracy for lower cost and same thermal/noise performance; versus TLVH431ACDBVR, it offers superior fixed-voltage precision, lower noise, and simpler implementation without external components.
Availability
LM4040DIM3-2.0/NOPB is available at Aetrix Electronics and suitable for industrial field transmitters, energy infrastructure monitoring, and analog input modules requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4040DIM3-2.0/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-qualified components.
The LM4040-N family was engineered for space-constrained, high-stability applications including industrial automation, energy metering, and automotive subsystems - prioritizing micropower operation, low noise, and robust thermal performance in miniature packages.
FAQ
What is the maximum operating current for LM4040DIM3-2.0/NOPB?
The LM4040DIM3-2.0/NOPB supports a maximum operating current of 15 mA. This rating applies across its full industrial temperature range (−40°C to +85°C) and ensures stable regulation without thermal runaway when properly heatsinked on standard FR-4 PCBs. Exceeding 15 mA risks exceeding absolute maximum power dissipation limits in the SOT-23 package.
Does LM4040DIM3-2.0/NOPB require an external capacitor for stability?
No, the LM4040DIM3-2.0/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization capacitance while maintaining regulation integrity even with capacitive loads - a key advantage for compact, low-component-count designs like portable sensors and modular I/O systems.
What is the temperature coefficient specification for LM4040DIM3-2.0/NOPB?
The LM4040DIM3-2.0/NOPB has a maximum average temperature coefficient of 100 ppm/°C over −40°C to +85°C. This means its output voltage drift remains within ±0.13% across the full industrial temperature range, supporting accurate measurements in uncontrolled environments such as outdoor energy monitors or factory-floor transmitters.
Can LM4040DIM3-2.0/NOPB be used in automotive applications?
The LM4040DIM3-2.0/NOPB is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive applications, TI offers the LM4040-N-Q1 series (e.g., LM4040QDIM3-2.0/NOPB), which meets AEC-Q100 Grade 3 requirements. Using LM4040DIM3-2.0/NOPB in automotive contexts requires full system-level qualification by the end customer.
What does the 'D' grade signify in LM4040DIM3-2.0/NOPB?
The 'D' in LM4040DIM3-2.0/NOPB denotes the initial reverse breakdown voltage tolerance grade: ±1.0% (±20 mV) at 25°C. This grade balances cost and precision for applications where moderate accuracy suffices - such as non-critical sensor interfaces or mid-tier industrial controls - without requiring the tighter ±0.5% (C-grade) or ±0.1% (A-grade) specifications.
LM4040DIM3-2.0/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:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DIM3-2.0/NOPB FAQ
1.How can I place an order for LM4040DIM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIM3-2.0/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 LM4040DIM3-2.0/NOPB reliable?
The price and inventory of LM4040DIM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DIM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIM3-2.0/NOPB?
LM4040DIM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIM3-2.0/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 LM4040DIM3-2.0/NOPB?
For technical support, including LM4040DIM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040DIM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DIM3-2.0/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 LM4040DIM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DIM3-2.0/NOPB?
All LM4040DIM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIM3-2.0/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 LM4040DIM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DIM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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