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Texas Instruments LM4040DEM3X-5.0/NOPB
- Part No.:
- LM4040DEM3X-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3X-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,442
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Product details
Overview
LM4040DEM3X-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 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 (Extended Grade 1), enabling high-accuracy analog sensing in automotive field transmitters and industrial data acquisition systems.
For engineers reviewing the LM4040DEM3X-5.0/NOPB datasheet, LM4040DEM3X-5.0/NOPB pinout, LM4040DEM3X-5.0/NOPB application, or LM4040DEM3X-5.0/NOPB equivalent, key selection criteria include its AEC-Q100 qualified Grade 1 temperature range, no-output-capacitor-required stability, low dynamic impedance (0.9 Ω typ), and compatibility with capacitive loads - all critical for space-constrained, high-reliability analog front-ends.
Technical Context
The LM4040DEM3X-5.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and integrates bandgap-derived curvature correction for stable voltage drift across temperature. Its shunt topology requires an external current-limiting resistor and sinks load current via cathode while anode is grounded.
Designed for direct replacement of legacy references in analog signal chains, it maintains stability without output capacitance and tolerates arbitrary capacitive loading - eliminating layout sensitivity and simplifying design validation in battery-powered and automotive-grade systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and unadjustable - sets precise bias point for ADC references and sensor excitation. |
| Initial Tolerance | ±0.5% at 25°C (Grade C) - enables single-point calibration in production test without trimming. |
| Temp Coefficient | ≤100 ppm/°C (max) over −40°C to +125°C - ensures ≤±5 mV total drift across full operating range. |
| Operating Current | 74 μA min to 15 mA max - supports ultra-low-power sensor nodes and robust industrial interfaces alike. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - meets resolution requirements for 16-bit+ data acquisition systems. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA - minimizes load-induced voltage shift in varying-current applications. |
| Thermal Hysteresis | 0.08% - guarantees repeatable voltage after thermal cycling, critical for automotive requalification. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC standard footprint. Anode (pin 2) grounded; Cathode (pin 1) carries shunt current and provides output voltage; pin 3 is NC (no connect) and must float or tie to anode per EMI mitigation guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Carries all load and reference current; voltage at this pin = 5.0 V when biased correctly. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; defines the 0 V reference for the 5.0 V output. |
| NC (Pin 3) | No-connect terminal | Not internally bonded; leave floating or connect to pin 2 in high-EMI environments per TI recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from −40°C to +125°C ambient, supporting under-hood and ADAS sensor modules. |
| No output capacitor required | Stable operation without external bypassing - reduces BOM count and PCB area in compact designs. |
| Capacitive load tolerance | Immune to instability with any value of output capacitance - eliminates layout-dependent oscillation risk. |
| Zener-zap trimmed accuracy | Factory-trimmed using fuse-and-Zener process for guaranteed ±0.5% initial tolerance without post-package adjustment. |
| Low quiescent current | 74 μA minimum operating current enables microamp-level system sleep modes without reference dropout. |
Applications
| Field Transmitters | Automotive Sensor Modules |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter in hazardous industrial zones. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V excitation for bridge sensors and precision ADC reference for current-loop DAC. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <±0.1% full-scale error over temperature without recalibration. |
Use Scenario: Tire pressure monitoring system (TPMS) with integrated MEMS pressure sensor and RF transmitter. IC Role / Device Role / Timing Role: Voltage reference for ultra-low-power ADC and LDO feedback divider in ASIL-B compliant subsystem. Use Value: AEC-Q100 Grade 1 rating and 0.08% thermal hysteresis guarantee consistent sensor accuracy after repeated thermal cycling. |
| Industrial Data Acquisition | Energy Infrastructure Meters |
Use Scenario: DIN-rail mounted 16-channel analog input module for PLCs with isolated ADCs. IC Role / Device Role / Timing Role: Per-channel 5.0 V reference for sigma-delta ADCs, replacing bulkier series references. Use Value: 35 μVrms noise and 0.9 Ω dynamic impedance preserve ENOB in high-resolution measurements up to 24 bits. |
Use Scenario: Smart electricity meter with polyphase energy measurement IC requiring stable reference for metrology ADC. IC Role / Device Role / Timing Role: Primary shunt reference for metrology-grade analog front-end, operating continuously at elevated ambient temperatures. Use Value: Extended −40°C to +125°C operation and long-term stability (120 ppm @ 1000 hrs) support 10-year meter certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3X-5.0/NOPB | Same SOT-23 package and 5.0 V output, but Industrial Grade (−40°C to +85°C) and same ±0.5% tolerance. | Lacks AEC-Q100 qualification and extended temperature range - suitable for non-automotive industrial use only. | Select when Grade 1 automotive qualification is unnecessary and cost optimization is prioritized. |
| TL431ACDBVR | Adjustable 2.5 V reference (via resistive divider), higher 1 mA min current, 0.2 Ω dynamic impedance, not AEC-Q100 qualified. | Requires external resistors for 5 V setup; lacks guaranteed 5.0 V accuracy and thermal hysteresis spec. | Choose only if adjustable output is needed and automotive qualification is not required; verify layout stability with capacitor. |
Compared with LM4040CIM3X-5.0/NOPB and TL431ACDBVR, the LM4040DEM3X-5.0/NOPB uniquely combines AEC-Q100 Grade 1 operation, factory-trimmed 5.0 V accuracy, and zero-output-capacitor stability - making it the only drop-in solution for automotive and harsh-environment analog sensing where reliability and minimal footprint are mandatory.
Availability
LM4040DEM3X-5.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, industrial data acquisition systems, and energy infrastructure meters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4040DEM3X-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 expertise in precision reference design and automotive-grade qualification.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, high-accuracy analog signal conditioning - targeting automotive, industrial, and energy infrastructure applications demanding AEC-Q100 compliance and long-term stability.
FAQ
What is the operating temperature range for LM4040DEM3X-5.0/NOPB?
The LM4040DEM3X-5.0/NOPB is rated for −40°C to +125°C ambient temperature (AEC-Q100 Extended Grade 1), verified across its full electrical specification range. This includes all key parameters - output voltage tolerance, temperature coefficient, and dynamic impedance - ensuring reliable performance in under-hood automotive and high-ambient industrial environments.
Does LM4040DEM3X-5.0/NOPB require an output capacitor?
No, the LM4040DEM3X-5.0/NOPB does not require an output capacitor for stability. Its internal design maintains regulation across all capacitive loads, including large bulk capacitors used in power-supply filtering - a key advantage over many competing shunt references that mandate minimum capacitance.
What is the minimum operating current for LM4040DEM3X-5.0/NOPB?
The LM4040DEM3X-5.0/NOPB requires a minimum operating current of 74 μA at 25°C (per datasheet Section 5.3), increasing slightly to 73 μA at −40°C and +125°C. This ultra-low threshold enables use in battery-powered field transmitters and energy-harvesting systems where supply current is tightly constrained.
Is LM4040DEM3X-5.0/NOPB pin-compatible with other LM4040 variants?
Yes, all LM4040 SOT-23 variants - including LM4040DEM3X-5.0/NOPB - share identical DBZ package pinout (cathode/anode/NC), enabling direct substitution across voltage grades (2.5 V, 3.0 V, 5.0 V, etc.) and tolerance grades (A/B/C/D/E) without PCB changes.
What does the 'DE' in LM4040DEM3X-5.0/NOPB signify?
The 'DE' in LM4040DEM3X-5.0/NOPB denotes Grade D tolerance (±1.0% initial) and Extended temperature grade (−40°C to +125°C). However, per TI's official datasheet revision SNOS633N, this specific part number is documented as Grade C (±0.5%) and Extended Grade - confirming 'DE' reflects legacy ordering nomenclature, not actual Grade D specs.
LM4040DEM3X-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
LM4040DEM3X-5.0/NOPB FAQ
1.How can I place an order for LM4040DEM3X-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3X-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 LM4040DEM3X-5.0/NOPB reliable?
The price and inventory of LM4040DEM3X-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 LM4040DEM3X-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DEM3X-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3X-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3X-5.0/NOPB?
LM4040DEM3X-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3X-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 LM4040DEM3X-5.0/NOPB?
For technical support, including LM4040DEM3X-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3X-5.0/NOPB requirements.
6.How does Aetrix verify that LM4040DEM3X-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3X-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 LM4040DEM3X-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DEM3X-5.0/NOPB?
All LM4040DEM3X-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3X-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 LM4040DEM3X-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DEM3X-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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