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Texas Instruments LM4040CEM3X-3.0/NOPB
- Part No.:
- LM4040CEM3X-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CEM3X-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,752
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Product details
Overview
LM4040CEM3X-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 3.0 V reverse breakdown voltage with ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 62 μA to 15 mA over −40°C to +125°C and requires no output capacitor-ideal for space-constrained analog input modules and automotive sensor signal conditioning.
For engineers reviewing the LM4040CEM3X-3.0/NOPB datasheet, LM4040CEM3X-3.0/NOPB pinout, LM4040CEM3X-3.0/NOPB application, or LM4040CEM3X-3.0/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal performance in SOT-23, and two rigorously cross-referenced alternative parts for industrial and AEC-Q100 Grade 1 designs.
Technical Context
The LM4040CEM3X-3.0/NOPB uses Zener-zap trimming at wafer sort to achieve ±0.5% initial accuracy at 25°C and integrates bandgap-derived curvature correction for low drift across temperature. Its dynamic impedance remains ≤0.9 Ω at 1 mA, enabling stable regulation under varying load currents from 62 μA to 15 mA.
This device is rated for extended temperature operation (−40°C to +125°C) and qualified per AEC-Q100 Grade 1, with ESD robustness of ±2000 V HBM and ±750 V CDM. It tolerates capacitive loads without oscillation and exhibits only 0.08% thermal hysteresis after cycling between −40°C and +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed-enables precise ADC/DAC biasing without external adjustment. |
| Initial Tolerance | ±0.5% at 25°C (C grade)-supports high-accuracy current-sense amplifiers and 12-bit+ data acquisition systems. |
| Temp Coefficient | ≤100 ppm/°C max over −40°C to +125°C-ensures <±3 mV drift across full automotive operating range. |
| Operating Current | 62 μA min to 15 mA max-allows ultra-low-power field transmitter operation while supporting fast transient response in active filters. |
| Noise (10 Hz–10 kHz) | 35 μVrms typical-minimizes added error in precision instrumentation amplifier front-ends. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA-maintains tight regulation during digital switching-induced supply transients. |
| Thermal Hysteresis | 0.08%-guarantees repeatable voltage after thermal cycling, critical for calibration-critical test equipment. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current path and regulated output node-connects to load and 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-must remain floating or tied to anode per TI layout guidance for EMI suppression in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with any capacitive load up to 10 nF-eliminates BOM cost and PCB area for decoupling caps in compact modules. |
| Zener-zap voltage trim | Factory-trimmed at wafer level to ±0.5%-avoids post-package calibration and ensures first-pass yield in high-volume production. |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C operation with 1000-hr life testing-meets functional safety requirements for engine control and ADAS sensors. |
| Low dynamic impedance | ≤0.9 Ω at 1 mA-reduces output voltage shift during load steps, improving accuracy in multiplexed analog front-ends. |
| Wide current range | 62 μA to 15 mA operation-supports both battery-powered IoT nodes and high-speed data acquisition with active filtering. |
Applications
| Field Transmitters | Automotive Sensors |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitters in oil & gas refineries. IC Role / Device Role / Timing Role: Shunt reference for DAC output scaling and current-loop driver biasing. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <0.25% total error over −40°C to +85°C ambient-meeting IEC 61293 Class 0.5 accuracy. |
Use Scenario: Tire pressure monitoring system (TPMS) and exhaust gas recirculation (EGR) position sensors. IC Role / Device Role / Timing Role: Precision bias reference for bridge amplifier and ADC input stage. Use Value: AEC-Q100 Grade 1 qualification and 0.08% thermal hysteresis enable repeatable calibration after vehicle thermal soak cycles. |
| Energy Infrastructure Meters | Analog Input Modules |
Use Scenario: Revenue-grade polyphase electricity meters with anti-tampering features. IC Role / Device Role / Timing Role: Reference for metrology ADCs (e.g., ADS131M04) and isolation amplifier feedback paths. Use Value: 35 μVrms noise and ≤0.9 Ω dynamic impedance preserve EN 50470-3 Class 0.2 measurement integrity under EMI-rich grid conditions. |
Use Scenario: Modular PLC analog input cards accepting ±10 V, 0–20 mA, and thermocouple inputs. IC Role / Device Role / Timing Role: Stable 3.0 V reference for programmable gain instrumentation amplifiers and multiplexed ADC drivers. Use Value: No-output-capacitor design simplifies layout in dense multi-channel boards, while 62 μA min current enables low-power sleep-mode retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | 3.0 V, ±0.5%, SOT-23-3, 75 ppm/°C max TC, 20 μVrms noise-lower noise but higher min current (75 μA). | Better for low-noise precision ADCs; less suitable for ultra-low-power transmitters below 75 μA. | Select when noise budget is tighter than current budget; verify layout compatibility with different thermal pad structure. |
| MAX6003EUR+T | 3.0 V, ±0.5%, SOT-23-3, 100 ppm/°C max TC, 40 μVrms noise, 60 μA min current-similar specs but non-AEC-Q100. | Acceptable for industrial data loggers; not qualified for automotive Grade 1 environments. | Choose for cost-sensitive industrial designs where AEC-Q100 is not mandated; confirm long-term stability data matches LM4040CEM3X-3.0/NOPB's 120 ppm. |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040CEM3X-3.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 35 μVrms noise, and 62 μA minimum operating current-making it the only option qualified for automotive sensor signal chains requiring simultaneous low power, low drift, and functional safety compliance.
Availability
LM4040CEM3X-3.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, automotive sensors, and energy infrastructure meters requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant traceability.
Supply support for LM4040CEM3X-3.0/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 applications-including automotive sensor interfaces, industrial process control, and portable instrumentation-where stability, low drift, and qualification rigor are mandatory.
FAQ
What is the maximum operating temperature range for the LM4040CEM3X-3.0/NOPB?
The LM4040CEM3X-3.0/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 62 μA to 15 mA operating current range. The device maintains its ±0.5% initial tolerance and ≤100 ppm/°C temperature coefficient within this envelope, making LM4040CEM3X-3.0/NOPB suitable for under-hood automotive and industrial edge computing applications.
Does the LM4040CEM3X-3.0/NOPB require an external output capacitor?
No, the LM4040CEM3X-3.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load up to 10 nF, eliminating the need for additional decoupling components. This feature reduces bill-of-materials cost and PCB area-particularly valuable in SOT-23-based analog input modules and compact field transmitters where board space is constrained. The LM4040CEM3X-3.0/NOPB remains stable even when driving directly into ADC input capacitors or op-amp feedback networks.
What is the minimum cathode current needed for regulation in the LM4040CEM3X-3.0/NOPB?
The LM4040CEM3X-3.0/NOPB requires a minimum cathode current of 62 μA at 25°C to maintain regulation, increasing to 68 μA over the full −40°C to +125°C range. This value is specified in Section 5.7 of the TI datasheet for the C-grade, extended-temperature variant. Designers must ensure the series current-limiting resistor provides ≥62 μA under worst-case conditions (e.g., lowest input voltage, highest reference voltage drop) to guarantee stable 3.0 V output across all operating conditions.
How does the LM4040CEM3X-3.0/NOPB compare to the LM4040AIM3X-3.0/NOPB in accuracy?
The LM4040CEM3X-3.0/NOPB has ±0.5% initial tolerance at 25°C, whereas the LM4040AIM3X-3.0/NOPB offers ±0.1% (A grade). Both share identical 100 ppm/°C max temperature coefficient and 35 μVrms noise. The key trade-off is accuracy vs. cost and qualification: LM4040CEM3X-3.0/NOPB adds AEC-Q100 Grade 1 qualification, while LM4040AIM3X-3.0/NOPB targets high-precision lab equipment. For automotive applications where ±0.5% meets system-level error budgets, LM4040CEM3X-3.0/NOPB delivers certified reliability without over-specifying.
Is Pin 3 (NC) on the LM4040CEM3X-3.0/NOPB required to be connected?
Pin 3 on the LM4040CEM3X-3.0/NOPB is a no-connect terminal and must remain unconnected unless EMI mitigation is required. TI recommends connecting Pin 3 to Pin 2 (Anode) only in high-noise environments-such as near switching power supplies or motor drivers-to reduce susceptibility to electromagnetic interference. In standard industrial layouts, leaving Pin 3 floating is fully compliant and preserves the device's specified electrical performance, including thermal hysteresis and long-term stability.
LM4040CEM3X-3.0/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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CEM3X-3.0/NOPB FAQ
1.How can I place an order for LM4040CEM3X-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CEM3X-3.0/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 LM4040CEM3X-3.0/NOPB reliable?
The price and inventory of LM4040CEM3X-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CEM3X-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CEM3X-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CEM3X-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CEM3X-3.0/NOPB?
LM4040CEM3X-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CEM3X-3.0/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 LM4040CEM3X-3.0/NOPB?
For technical support, including LM4040CEM3X-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CEM3X-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040CEM3X-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CEM3X-3.0/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 LM4040CEM3X-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CEM3X-3.0/NOPB?
All LM4040CEM3X-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CEM3X-3.0/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 LM4040CEM3X-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040CEM3X-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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