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Texas Instruments LM4040DEM3-5.0/NOPB
- Part No.:
- LM4040DEM3-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,096
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Product details
Overview
LM4040DEM3-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.5% initial tolerance (Grade C), 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 74 μA to 15 mA over −40°C to +125°C and requires no output capacitor-used in high-accuracy analog signal conditioning for industrial data acquisition systems.
For engineers reviewing the LM4040DEM3-5.0/NOPB datasheet, LM4040DEM3-5.0/NOPB pinout, LM4040DEM3-5.0/NOPB application, or LM4040DEM3-5.0/NOPB equivalent, key selection criteria include its extended-temperature shunt reference performance, low dynamic impedance (≤0.9 Ω), capacitive-load stability, and AEC-Q100 Grade 1 qualification for automotive under-hood sensing.
Technical Context
The LM4040DEM3-5.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and incorporates bandgap-derived temperature drift curvature correction. Its shunt topology regulates voltage by sinking variable current through the cathode while maintaining anode at ground potential.
It achieves thermal hysteresis of only 0.08% after cycling between −40°C and +125°C and exhibits load regulation of ≤1 mV over 74 μA–1 mA and ≤10 mV over 1–15 mA-enabling stable reference operation across wide supply and load transients in space-constrained PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage-sets precise bias point for ADCs, DACs, and sensor signal chains. |
| Initial Tolerance | ±0.5% at 25°C (Grade C)-supports 12-bit system accuracy without calibration in industrial field transmitters. |
| Temp Coefficient | ≤100 ppm/°C (max)-ensures <±0.5% total drift over −40°C to +125°C, critical for automotive engine control modules. |
| Operating Current | 74 μA to 15 mA-enables ultra-low-power sensor nodes and robust operation under high-current load switching. |
| Noise (10Hz–10kHz) | 35 μVrms-minimizes added uncertainty in precision 16-bit+ data acquisition front-ends. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA-maintains tight regulation despite rapid load current changes in closed-loop power monitoring. |
| Thermal Hysteresis | 0.08%-guarantees repeatable voltage after thermal cycling, essential for recalibration-free field instrumentation. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC standard footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Ground reference node | Must be connected to system ground; serves as voltage reference return path and thermal sink. |
| Cathode (Pin 1) | Shunt current input / output voltage node | Connects to regulated 5.0 V rail; sinks all excess current to maintain stable voltage under varying loads. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to anode per EMI mitigation guidance in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Eliminates BOM cost and layout area for stabilization-reduces design cycle time for compact sensor modules. |
| Capacitive-load tolerant | Stable with any output capacitance up to 10 μF-enables direct interface with ADC sample-and-hold inputs without isolation resistors. |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C operation in automotive powertrain and chassis systems-meets functional safety readiness requirements. |
| Zener-zap voltage trim | Ensures ±0.5% initial accuracy without post-package adjustment-guarantees yield and reduces test overhead in high-volume manufacturing. |
| Low 35 μVrms noise | Preserves SNR in precision measurement paths-avoids need for additional low-noise LDO filtering stages. |
Applications
| Industrial Data Acquisition | Automotive Engine Control |
|---|---|
Use Scenario: High-resolution analog input module digitizing thermocouple and RTD signals in PLC backplanes. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V excitation and ADC reference voltage. Use Value: Enables 16-bit effective resolution by limiting reference-induced error to <0.01% FS across temperature and aging. | Use Scenario: Fuel injector driver feedback loop requiring accurate current sense voltage scaling in under-hood ECUs. IC Role / Device Role / Timing Role: Precision voltage clamp setting threshold for overcurrent protection comparators. Use Value: Maintains trip-point accuracy within ±10 mV over full automotive temperature range, preventing false shutdowns. |
| Energy Infrastructure Monitoring | Process Field Transmitter |
Use Scenario: Smart meter voltage monitoring channel measuring grid phase-to-phase AC voltage via resistive divider. IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADC converting scaled AC waveform. Use Value: Delivers <±0.1% total error contribution over 20-year field life-meeting ANSI C12.20 Class 0.2 accuracy class. | Use Scenario: 4–20 mA HART-enabled pressure transmitter operating in hazardous Zone 1 environments. IC Role / Device Role / Timing Role: Stable 5.0 V reference for microcontroller ADC and analog front-end gain calibration. Use Value: Supports zero/span calibration traceability to NIST standards with <5 ppm/°C long-term drift over 15 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Adjustable 2.495 V reference; higher 2.5 Ω dynamic impedance; ±1% initial tolerance; no AEC-Q100 qualification. | Requires external resistor network for 5.0 V setup; unsuitable for Grade 1 automotive use; lower accuracy limits 14-bit system resolution. | Select when adjustable output or cost sensitivity outweighs precision and automotive compliance requirements. |
| MAX6008AEUR+T | Fixed 5.0 V; ±0.2% initial tolerance; 75 ppm/°C tempco; SC70-3 package; not AEC-Q100 qualified. | Higher accuracy but lacks extended-temp validation; smaller SC70 footprint increases thermal stress in high-power density layouts. | Prefer for commercial-grade portable instruments where size and initial accuracy are prioritized over automotive reliability. |
Compared with TL431ACDBVR and MAX6008AEUR+T, LM4040DEM3-5.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, fixed 5.0 V output, and proven 0.08% thermal hysteresis-making it the only choice for recalibration-free, safety-critical automotive and industrial field devices operating beyond 105°C.
Availability
LM4040DEM3-5.0/NOPB is available at Aetrix Electronics and suitable for industrial data acquisition, automotive engine control, and energy infrastructure monitoring requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM4040DEM3-5.0/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 leadership in precision reference design.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, high-accuracy applications including automotive sensors, industrial process control, and portable instrumentation-prioritizing low drift, low noise, and qualification rigor.
FAQ
What is the maximum operating temperature range for LM4040DEM3-5.0/NOPB?
The LM4040DEM3-5.0/NOPB is qualified for operation from −40°C to +125°C (AEC-Q100 Grade 1 extended temperature range). This rating is verified per TI's production test flow and applies across the full 74 μA–15 mA operating current range. The device maintains specified voltage tolerance, tempco, and dynamic impedance within this envelope-making LM4040DEM3-5.0/NOPB suitable for under-hood automotive and industrial edge computing deployments.
Does LM4040DEM3-5.0/NOPB require an external capacitor for stability?
No, LM4040DEM3-5.0/NOPB does not require an external output capacitor. Its internal design ensures unconditional stability with capacitive loads up to 10 μF, eliminating the need for external compensation components. This simplifies layout, reduces BOM count, and avoids capacitor-related aging or ESR drift effects-key advantages in long-life field transmitter and smart meter designs where LM4040DEM3-5.0/NOPB serves as the primary reference.
What is the minimum cathode current needed for LM4040DEM3-5.0/NOPB to regulate at 5.0 V?
The LM4040DEM3-5.0/NOPB requires a minimum cathode current of 74 μA at 25°C to maintain regulation at its nominal 5.0 V output. This value increases slightly at temperature extremes-up to 73 μA at −40°C and +125°C per Grade E specifications-but remains well below 100 μA. Designers must ensure series resistance and supply headroom allow at least this current under worst-case conditions to guarantee LM4040DEM3-5.0/NOPB remains in breakdown.
How does the noise performance of LM4040DEM3-5.0/NOPB impact high-resolution ADC applications?
LM4040DEM3-5.0/NOPB delivers 35 μVrms wideband noise (10 Hz–10 kHz), contributing <0.001% of full-scale error in a 5 V-referenced 16-bit ADC (LSB = 76 μV). This low noise floor avoids degrading ENOB in precision data acquisition systems-unlike higher-noise alternatives that force designers to add RC filtering or low-noise LDOs. For LM4040DEM3-5.0/NOPB, the noise specification is measured at 100 μA operating current and remains stable across its full current range.
Is LM4040DEM3-5.0/NOPB pin-compatible with other LM4040 variants in SOT-23?
Yes, LM4040DEM3-5.0/NOPB shares identical SOT-23-3 (DBZ) pinout and footprint with all LM4040-N and LM4040-N-Q1 variants in the same package-including LM4040AIM3-5.0/NOPB and LM4040BIM3-5.0/NOPB. Pin 1 is cathode, Pin 2 is anode, and Pin 3 is NC. This allows drop-in replacement across tolerance grades and voltage options without PCB revision, provided thermal and current requirements are met for the selected variant.
LM4040DEM3-5.0/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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 88 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3-5.0/NOPB FAQ
1.How can I place an order for LM4040DEM3-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-5.0/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 LM4040DEM3-5.0/NOPB reliable?
The price and inventory of LM4040DEM3-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-5.0/NOPB?
LM4040DEM3-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-5.0/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 LM4040DEM3-5.0/NOPB?
For technical support, including LM4040DEM3-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-5.0/NOPB requirements.
6.How does Aetrix verify that LM4040DEM3-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-5.0/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 LM4040DEM3-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-5.0/NOPB?
All LM4040DEM3-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-5.0/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 LM4040DEM3-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DEM3-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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