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Texas Instruments LM4040CEM3-3.0/NOPB
- Part No.:
- LM4040CEM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CEM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,440
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Product details
Overview
LM4040CEM3-3.0/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 (extended grade), and requires no output capacitor-ideal for space-constrained analog input modules and field transmitters.
For engineers reviewing the LM4040CEM3-3.0/NOPB datasheet, LM4040CEM3-3.0/NOPB pinout, LM4040CEM3-3.0/NOPB application, or LM4040CEM3-3.0/NOPB equivalent, key selection criteria include its fixed 3.0 V output, extended-temperature automotive-grade qualification (AEC-Q100 Grade 1), low dynamic impedance (0.9 Ω typ), and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4040CEM3-3.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and integrates bandgap-based temperature drift curvature correction. Its shunt topology regulates voltage by sinking current through the cathode terminal, enabling simple two-terminal biasing in feedback paths of ADCs, DACs, and sensor signal chains.
Designed for high-reliability industrial and automotive systems, it supports operation across −40°C to +125°C with guaranteed long-term stability (120 ppm after 1000 hrs) and thermal hysteresis of just 0.08%. The device maintains stability under capacitive loading and tolerates ESD up to ±2000 V (HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed-eliminates need for external adjustment circuitry. |
| Initial Tolerance | ±0.5% at 25°C (C grade)-supports mid-precision applications like industrial data acquisition where ±15 mV absolute error is acceptable. |
| Temp Coefficient | ≤100 ppm/°C (max over −40°C to +125°C)-ensures ≤±30 mV drift across full operating range, critical for unregulated supply environments. |
| Operating Current | 62 μA to 15 mA-enables ultra-low-power sensor biasing (<100 μA) and robust regulation under heavy load (e.g., driving op-amp references). |
| Output Noise | 35 μVrms (10 Hz–10 kHz)-low enough for 16-bit ADC reference buffering without additional filtering. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA-minimizes load-induced voltage shift, improving regulation in varying-current applications like programmable logic controllers. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-standard footprint. Anode (pin 2) grounded; cathode (pin 1) carries shunt current and defines output voltage node; pin 3 is NC (no connect), recommended floating or tied to anode for EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Voltage is developed across external series resistor; cathode voltage = 3.0 V when current ≥62 μA-functions as precision voltage clamp. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; establishes return path for shunt current-floating anode disables regulation. |
| NC (Pin 3) | No-connect terminal | Not internally bonded; TI recommends leaving floating or connecting to pin 2 in high-noise environments to reduce EMI susceptibility. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable under all capacitive loads up to 10 nF-reduces BOM count and PCB area in compact sensor nodes. |
| Zener-zap voltage trim | Factory-trimmed accuracy better than ±0.5% at 25°C-enables drop-in replacement without calibration in production test. |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C operation in automotive ECUs-meets reliability requirements for engine control and ADAS power domains. |
| Low 35 μVrms noise | Enables direct use as reference for 16-bit SAR ADCs without post-regulation filtering-simplifies analog front-end design. |
| 62 μA min operating current | Supports battery-powered field transmitters with microamp-level sleep modes while retaining reference integrity on wake-up. |
Applications
| Industrial Data Acquisition | Automotive Engine Control Unit |
|---|---|
|
Use Scenario: High-channel-count PLC analog input module measuring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Shunt reference for 24-bit delta-sigma ADC biasing and gain-setting resistors. Use Value: 100 ppm/°C tempco ensures <±0.01% FS error over cabinet temperature swings; 35 μVrms noise avoids resolution loss in 120 dB SNR designs. |
Use Scenario: Fuel injector driver board requiring precise 3.0 V reference for current-sense amplifier offset calibration. IC Role / Device Role / Timing Role: Stable voltage node for ratiometric sensing in harsh under-hood environments. Use Value: AEC-Q100 Grade 1 rating guarantees operation at 125°C ambient; ±0.5% tolerance enables single-point factory calibration across production lot. |
| Energy Infrastructure Metering | Process Field Transmitter |
|
Use Scenario: Revenue-grade electricity meter with isolated ADC measuring grid voltage and current waveforms. IC Role / Device Role / Timing Role: Primary reference for isolated sigma-delta modulator powering metrology SoC. Use Value: 120 ppm long-term stability ensures <0.1% error accumulation over 10-year service life; no capacitor needed simplifies isolation barrier layout. |
Use Scenario: 4–20 mA HART-enabled pressure transmitter with loop-powered microcontroller. IC Role / Device Role / Timing Role: Low-current reference for DAC output scaling and sensor excitation circuitry. Use Value: 62 μA minimum operating current allows continuous regulation during 3.5 mA loop sleep mode-maintains fast wake-up response. |
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, but higher 150 ppm/°C max tempco and 75 μVrms noise. | Limited to industrial-grade (−40°C to +85°C) use; not AEC-Q100 qualified. | Choose when cost sensitivity outweighs automotive qualification and noise performance. |
| MAX6003EUR+T | 3.0 V, ±0.5%, SOT-23-3, 75 ppm/°C max tempco, 20 μA min current-but only rated to +85°C. | Not suitable for extended-temperature automotive or industrial control cabinets. | Select if ultra-low quiescent current (20 μA) is mandatory and ambient stays below 85°C. |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040CEM3-3.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 100 ppm/°C tempco, and 35 μVrms noise in a single SOT-23-3 device-making it the only option for automotive-grade, low-noise, extended-temperature shunt references without design compromises.
Availability
LM4040CEM3-3.0/NOPB is available at Aetrix Electronics and suitable for industrial data acquisition, automotive engine control units, and energy infrastructure metering requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM4040CEM3-3.0/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 voltage references and automotive-qualified components.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, high-reliability applications-including automotive sensors, industrial PLCs, and portable instrumentation-where stability, low noise, and qualification rigor are non-negotiable.
FAQ
What is the maximum operating temperature for LM4040CEM3-3.0/NOPB?
The LM4040CEM3-3.0/NOPB is qualified for extended temperature operation from −40°C to +125°C (AEC-Q100 Grade 1), with full electrical specifications guaranteed across this range. Its thermal hysteresis is limited to 0.08%, and long-term stability remains within 120 ppm after 1000 hours at 25°C. This makes LM4040CEM3-3.0/NOPB suitable for under-hood automotive and industrial control cabinet deployments.
Does LM4040CEM3-3.0/NOPB require an external capacitor for stability?
No, the LM4040CEM3-3.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load up to at least 10 nF, eliminating the need for additional components in space-constrained layouts. This feature is explicitly validated in the datasheet and applies directly to LM4040CEM3-3.0/NOPB across its full operating current range (62 μA to 15 mA).
What is the minimum cathode current needed for LM4040CEM3-3.0/NOPB to regulate at 3.0 V?
The LM4040CEM3-3.0/NOPB requires a minimum cathode current of 62 μA at 25°C to maintain regulation at its nominal 3.0 V output. At full temperature range (−40°C to +125°C), the minimum increases to 68 μA. Below this threshold, the device exits regulation and output voltage drops nonlinearly-so design must ensure series resistor limits maximum current while guaranteeing ≥68 μA under worst-case low-temp, low-VIN conditions.
Is LM4040CEM3-3.0/NOPB pin-compatible with other LM4040 variants in SOT-23-3?
Yes, LM4040CEM3-3.0/NOPB shares identical SOT-23-3 (DBZ) pinout and footprint with all other LM4040-M3 variants-including LM4040AIM3-3.0 and LM4040DIM3-3.0. Pin 1 is cathode, pin 2 is anode, and pin 3 is NC. This allows direct substitution within the same voltage grade (3.0 V) when upgrading or downgrading tolerance or temperature grade without PCB changes.
How does the noise performance of LM4040CEM3-3.0/NOPB compare to similar shunt references?
The LM4040CEM3-3.0/NOPB delivers 35 μVrms wideband noise (10 Hz–10 kHz), matching the best-in-class performance of the A-grade LM4040AIM3-3.0 and outperforming alternatives like TL4050C30IDBZR (75 μVrms). This low noise enables direct use with 16-bit and higher-resolution ADCs without added filtering, preserving signal integrity in precision measurement systems using LM4040CEM3-3.0/NOPB.
LM4040CEM3-3.0/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
LM4040CEM3-3.0/NOPB FAQ
1.How can I place an order for LM4040CEM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CEM3-3.0/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 LM4040CEM3-3.0/NOPB reliable?
The price and inventory of LM4040CEM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CEM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CEM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CEM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CEM3-3.0/NOPB?
LM4040CEM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CEM3-3.0/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 LM4040CEM3-3.0/NOPB?
For technical support, including LM4040CEM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CEM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040CEM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CEM3-3.0/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 LM4040CEM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CEM3-3.0/NOPB?
All LM4040CEM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CEM3-3.0/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 LM4040CEM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040CEM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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