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Texas Instruments LM4040CEM3-5.0/NOPB
- Part No.:
- LM4040CEM3-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CEM3-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,082
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Product details
Overview
LM4040CEM3-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage with ±10 mV (±0.2%) initial tolerance at 25°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, enabling high-accuracy analog sensing in automotive and industrial data acquisition systems.
For engineers reviewing the LM4040CEM3-5.0/NOPB datasheet, LM4040CEM3-5.0/NOPB pinout, LM4040CEM3-5.0/NOPB application, or LM4040CEM3-5.0/NOPB equivalent, key selection criteria include extended-temperature shunt reference stability, no-output-capacitor operation, capacitive-load tolerance, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4040CEM3-5.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.2% initial accuracy and integrates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (≤0.9 Ω at 1 mA) ensures stable regulation across load and temperature variations.
Designed as a two-terminal shunt device, it functions by sinking current through its cathode to maintain precise 5.0 V across external loads. It requires no output capacitor and tolerates arbitrary capacitive loading-eliminating stability concerns common in series references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed |
| Initial Tolerance | ±10 mV (±0.2%) at 25°C - enables single-point calibration in high-precision ADC/DAC biasing |
| Temp Coefficient | 100 ppm/°C max - limits voltage drift to ±500 μV over −40°C to +125°C range |
| Operating Current | 74 μA to 15 mA - supports ultra-low-power sensor interfaces and high-current reference buffering |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - suitable for 16-bit+ data acquisition without additional filtering |
| Thermal Hysteresis | 0.08% - ensures repeatable voltage after thermal cycling between −40°C and +125°C |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C) - maintains accuracy in field-deployed instrumentation |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body, 1.45 mm height, JEDEC MO-178 compatible. Anode grounded, cathode supplies regulated voltage via shunt current path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output node | Connects to supply rail; sinks variable current to hold 5.0 V across load |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines 0 V reference point for output |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per EMI mitigation guidance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to +125°C ambient |
| No output capacitor required | Stable under all capacitive loads - eliminates BOM cost and layout area for stabilization caps |
| Low quiescent current | 74 μA minimum operating current - enables battery-powered field transmitters with multi-year life |
| Low dynamic impedance | ≤0.9 Ω at 1 mA - minimizes load-regulation error (<8 mV from 74 μA to 15 mA) |
| Zener-zap voltage trim | Factory-trimmed at wafer level - guarantees ±0.2% initial accuracy without post-package calibration |
Applications
| Automotive Cabin Sensors | Industrial Analog Input Modules |
|---|---|
Use Scenario: High-reliability temperature and pressure sensing in engine control units and HVAC modules. IC Role / Device Role / Timing Role: Shunt reference providing excitation and ADC reference voltage for ratiometric sensor signal conditioning. Use Value: Maintains ±0.2% voltage accuracy across −40°C to +125°C, ensuring sensor linearity and diagnostic integrity without recalibration. |
Use Scenario: 16-bit isolated analog input channels in PLC and DCS I/O cards. IC Role / Device Role / Timing Role: Precision 5.0 V reference for SAR ADCs and programmable gain instrumentation amplifiers. Use Value: 35 μVrms noise and <0.08% thermal hysteresis enable consistent LSB-level measurement repeatability over thermal cycles. |
| Energy Metering Front-End | Medical Patient Monitoring |
Use Scenario: Anti-tamper energy meters requiring metrology-grade voltage reference under wide temperature and humidity ranges. IC Role / Device Role / Timing Role: Stable 5.0 V shunt reference for polyphase metering ICs and isolation amplifier bias networks. Use Value: 120 ppm long-term stability and AEC-Q100 qualification ensure 10-year accuracy compliance per IEC 62053-21. |
Use Scenario: Portable ECG and SpO₂ devices requiring low-power, high-accuracy biopotential signal chain references. IC Role / Device Role / Timing Role: Low-noise 5.0 V reference for ADCs and op-amp biasing in battery-operated medical sensors. Use Value: 74 μA min operating current extends battery life while 35 μVrms noise preserves signal-to-noise ratio in microvolt-level bio-signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | 5.0 V, ±0.5% initial tolerance, 75 ppm/°C max TC, SOT-23 package | Lower accuracy and higher tempco; not AEC-Q100 qualified | Select when cost sensitivity outweighs automotive qualification and 0.2% tolerance requirements |
| MAX6005EUR+T | 5.0 V, ±0.2% initial tolerance, 75 ppm/°C max TC, SC70 package, 60 μA min current | Smaller SC70 footprint but lower max current (10 mA); no AEC-Q100 Grade 1 rating | Prefer for space-constrained non-automotive designs needing same accuracy with lower quiescent current |
Compared with TL4050C50IDBZR and MAX6005EUR+T, the LM4040CEM3-5.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 0.2% tolerance, and full 15 mA drive capability in SOT-23 - making it the only option qualified for under-hood automotive reference applications demanding both precision and robustness.
Availability
LM4040CEM3-5.0/NOPB is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial analog input modules, energy metering front-ends, and portable medical monitoring devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040CEM3-5.0/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 component validation.
The LM4040-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications in automotive, industrial, and energy infrastructure systems where reliability across extreme temperatures is mandatory.
FAQ
What is the operating temperature range for LM4040CEM3-5.0/NOPB?
The LM4040CEM3-5.0/NOPB is rated for −40°C to +125°C ambient operation and is AEC-Q100 Grade 1 qualified. This extended temperature range is validated per TI's automotive stress testing protocol and applies across the full 74 μA to 15 mA operating current range. The device maintains specified electrical characteristics-including ±10 mV initial tolerance and 100 ppm/°C max temperature coefficient-within this range.
Does LM4040CEM3-5.0/NOPB require an output capacitor?
No, the LM4040CEM3-5.0/NOPB does not require an output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. This eliminates board space, cost, and reliability risk associated with external capacitors-confirmed in TI's LM4040-N datasheet Section 3 and Figure 8-1.
What is the minimum cathode current needed for LM4040CEM3-5.0/NOPB to regulate at 5.0 V?
The LM4040CEM3-5.0/NOPB requires a minimum cathode current of 74 μA at 25°C to maintain regulation at 5.0 V. This value increases slightly at temperature extremes, reaching 68 μA at −40°C and up to 73 μA at +125°C per Electrical Characteristics Table 5.7. Below this threshold, the device exits regulation and output voltage drops nonlinearly.
Is LM4040CEM3-5.0/NOPB pin-compatible with other LM4040 variants in SOT-23?
Yes, all LM4040 variants in the SOT-23 (DBZ) package-including LM4040AIM3-5.0, LM4040CIM3-5.0, and LM4040CEM3-5.0/NOPB-share identical pinout: Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3). Mechanical compatibility is confirmed in TI's Package Marking Information (Section 11.1) and Pin Configuration Figure 4-1.
How does the LM4040CEM3-5.0/NOPB achieve its 0.2% initial voltage tolerance?
The LM4040CEM3-5.0/NOPB achieves ±0.2% (±10 mV) initial tolerance at 25°C using fuse and Zener-zap trimming during wafer sort. This laser-based post-fabrication adjustment corrects process-induced voltage variations before packaging, ensuring every unit meets specification without requiring post-packaging calibration or sorting-detailed in Section 3 of the datasheet.
LM4040CEM3-5.0/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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 83 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CEM3-5.0/NOPB FAQ
1.How can I place an order for LM4040CEM3-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CEM3-5.0/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 LM4040CEM3-5.0/NOPB reliable?
The price and inventory of LM4040CEM3-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CEM3-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CEM3-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CEM3-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CEM3-5.0/NOPB?
LM4040CEM3-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CEM3-5.0/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 LM4040CEM3-5.0/NOPB?
For technical support, including LM4040CEM3-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CEM3-5.0/NOPB requirements.
6.How does Aetrix verify that LM4040CEM3-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CEM3-5.0/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 LM4040CEM3-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CEM3-5.0/NOPB?
All LM4040CEM3-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CEM3-5.0/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 LM4040CEM3-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040CEM3-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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