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Texas Instruments LM4040QCIM3-2.5/NOPB
- Part No.:
- LM4040QCIM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QCIM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,117
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Product details
Overview
LM4040QCIM3-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 2.5 V reverse breakdown voltage with ±0.1% initial tolerance (A grade), 35 μVrms wideband noise (10 Hz–10 kHz), and operation across −40°C to +125°C. It serves as a low-drift, low-noise reference for analog-to-digital converters in automotive sensor modules.
For engineers reviewing the LM4040QCIM3-2.5/NOPB datasheet, LM4040QCIM3-2.5/NOPB pinout, LM4040QCIM3-2.5/NOPB application, or LM4040QCIM3-2.5/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 100 ppm/°C max temperature coefficient, 60 μA to 15 mA operating current range, and capacitor-tolerant stability without external compensation.
Technical Context
The LM4040QCIM3-2.5/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.1% accuracy at 25°C and incorporates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (0.8 Ω typical) ensures minimal output voltage variation under load current changes.
Designed for shunt-mode operation, it functions with anode grounded and cathode supplying regulated voltage via series resistor. It tolerates capacitive loads without oscillation and requires no output capacitor-enabling compact, low-BOM designs in space-constrained automotive and industrial signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage; fixed value, no adjustment required. |
| Initial Tolerance | ±0.1% at 25°C (A grade); enables high-accuracy ADC biasing without calibration. |
| Temp Coefficient | ≤100 ppm/°C max over −40°C to +125°C; ensures <±25 mV drift across full automotive range. |
| Operating Current | 60 μA to 15 mA; supports ultra-low-power sensor nodes and high-current reference buffering. |
| Output Noise | 35 μVrms (10 Hz–10 kHz); preserves SNR in 16-bit+ data acquisition systems. |
| Thermal Hysteresis | 0.08% max; guarantees repeatable voltage after thermal cycling in engine bay environments. |
| Long-Term Stability | 120 ppm over 1000 hours; reduces calibration drift in field-deployed energy infrastructure meters. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, tape-and-reel compatible. Thermal resistance RθJA = 291.9°C/W (board mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output node | Connected to series resistor and load; supplies regulated 2.5 V to downstream circuitry. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines return path for shunt current. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; leave floating or tie to anode for EMI suppression in noisy automotive environments. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive use from −40°C to +125°C ambient, meeting stringent reliability requirements. |
| No external capacitor needed | Stable under all capacitive loads; eliminates BOM item and layout area for decoupling. |
| Zener-zap voltage trim | Ensures ±0.1% initial accuracy at 25°C without post-package calibration. |
| Low dynamic impedance | 0.8 Ω typical at 1 mA; minimizes load-regulation error in varying current conditions. |
| Wide operating current range | Functions reliably from 60 μA (ultra-low-power wake-up mode) to 15 mA (high-drive buffer support). |
Applications
| Automotive Sensor Module | Industrial Analog Input |
|---|---|
Use Scenario: Reference for 16-bit SAR ADC measuring exhaust gas oxygen concentration in Tier 1 powertrain control units. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.5 V reference to ADC's VREF pin. Use Value: ±0.1% tolerance and 100 ppm/°C TC maintain <0.01% total error across engine temperature cycles. | Use Scenario: Precision reference in DIN-rail-mounted PLC analog input module for 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Ground-referenced shunt reference enabling ratiometric measurement against sensor excitation. Use Value: 35 μVrms noise and low thermal hysteresis ensure <1 LSB error in 18-bit data acquisition over 10-year field life. |
| Energy Metering Front-End | Medical Instrument Signal Chain |
Use Scenario: Reference for metrology-grade ADC in ANSI C12.20-certified smart electricity meter. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ASIC requiring long-term stability. Use Value: 120 ppm long-term drift and AEC-Q100 qualification support 20-year metrology accuracy compliance. | Use Scenario: Reference for patient-connected ECG front-end amplifier and ADC in portable diagnostic device. IC Role / Device Role / Timing Role: Low-noise, isolated shunt reference powering precision instrumentation amplifier stages. Use Value: Capacitor-tolerant operation allows direct integration with anti-aliasing filter caps without instability risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040AIM3-2.5/NOPB | Same SOT-23-3 package and 2.5 V output; non-automotive grade (industrial only, −40°C to +85°C). | Lacks AEC-Q100 qualification; unsuitable for under-hood automotive use. | Select when cost sensitivity outweighs extended temperature or automotive qualification needs. |
| MAX6002AEUR+T | 2.5 V shunt reference in SOT-23-3; ±0.2% initial tolerance, 75 μVrms noise, 150 ppm/°C TC. | Higher noise and drift; not AEC-Q100 qualified; lower accuracy grade. | Acceptable for non-safety-critical industrial sensors where ±0.2% tolerance suffices. |
Compared with LM4040AIM3-2.5/NOPB and MAX6002AEUR+T, the LM4040QCIM3-2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, ±0.1% tolerance, and 35 μVrms noise-making it the only option qualified for high-accuracy automotive sensing and energy metering where long-term stability and low drift are mandatory.
Availability
LM4040QCIM3-2.5/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, industrial analog input systems, and energy infrastructure metering requiring stable component supply with guaranteed automotive-grade traceability and lifecycle continuity.
Supply support for LM4040QCIM3-2.5/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 qualification.
The LM4040-N/Q1 product line delivers micropower shunt references optimized for space-constrained, high-reliability applications including automotive ADAS sensors, industrial process transmitters, and utility-grade energy meters.
FAQ
What is the operating temperature range of the LM4040QCIM3-2.5/NOPB?
The LM4040QCIM3-2.5/NOPB is AEC-Q100 Grade 1 qualified, supporting continuous operation from −40°C to +125°C ambient temperature. This extended range is validated per automotive reliability standards and enables deployment in engine control units, transmission modules, and other under-hood locations where thermal stress is severe. The LM4040QCIM3-2.5/NOPB maintains specified electrical performance-including ±0.1% initial tolerance and ≤100 ppm/°C temperature coefficient-across this full range.
Does the LM4040QCIM3-2.5/NOPB require an external output capacitor?
No, the LM4040QCIM3-2.5/NOPB does not require an external output capacitor. Its advanced internal design provides inherent stability with any capacitive load, eliminating the need for external compensation components. This simplifies PCB layout, reduces BOM count, and improves reliability-especially in automotive applications where board space and component count are critical. The LM4040QCIM3-2.5/NOPB remains stable even when directly driving ADC reference inputs with integrated decoupling capacitance.
What is the minimum operating current for the LM4040QCIM3-2.5/NOPB?
The LM4040QCIM3-2.5/NOPB has a minimum operating current of 60 μA at 25°C, increasing to 65 μA across the full −40°C to +125°C temperature range. This ultra-low quiescent current enables use in battery-powered automotive sensors and energy-harvesting systems. Operation below 60 μA risks loss of regulation; the LM4040QCIM3-2.5/NOPB must be biased above this threshold using an appropriate series resistor to ensure stable 2.5 V output under all conditions.
How does the LM4040QCIM3-2.5/NOPB achieve ±0.1% initial accuracy?
The LM4040QCIM3-2.5/NOPB achieves ±0.1% initial accuracy through laser-trimmed Zener-zap reverse breakdown voltage adjustment performed during wafer sort. This precision trimming, combined with bandgap-derived temperature drift curvature correction, ensures tight tolerance without post-package calibration. The LM4040QCIM3-2.5/NOPB is tested 100% at 25°C to guarantee this specification, making it suitable for high-accuracy applications like metrology-grade energy meters and automotive position sensors.
Is the LM4040QCIM3-2.5/NOPB pin-compatible with other LM4040 variants?
Yes, the LM4040QCIM3-2.5/NOPB shares the same SOT-23-3 (DBZ) package and pinout as all LM4040xIM3 variants-including LM4040AIM3-2.5/NOPB and LM4040BIM3-2.5/NOPB-ensuring mechanical and electrical compatibility on the same footprint. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC (no connect). However, functional differences exist: only the 'Q' suffix denotes AEC-Q100 Grade 1 qualification, so substituting non-Q variants forfeits automotive reliability validation while retaining identical pin-level behavior.
LM4040QCIM3-2.5/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):
- 2.5V
- 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:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QCIM3-2.5/NOPB FAQ
1.How can I place an order for LM4040QCIM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QCIM3-2.5/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 LM4040QCIM3-2.5/NOPB reliable?
The price and inventory of LM4040QCIM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QCIM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QCIM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QCIM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QCIM3-2.5/NOPB?
LM4040QCIM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QCIM3-2.5/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 LM4040QCIM3-2.5/NOPB?
For technical support, including LM4040QCIM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QCIM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QCIM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QCIM3-2.5/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 LM4040QCIM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QCIM3-2.5/NOPB?
All LM4040QCIM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QCIM3-2.5/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 LM4040QCIM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QCIM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040QCIM3-2.5/NOPB Tags
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