My Inquiry
My Account
Texas Instruments LM4040QDEM3-2.5/NOPB
- Part No.:
- LM4040QDEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QDEM3-2.5/NOPB.pdf
- Description:
- LM4040-N-Q1 - AUTOMOTIVE 100-PPM
- Quantity:
- Payment:
- Shipping:
Inventory:6,762
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040QDEM3-2.5/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified precision shunt voltage reference delivering a stable 2.5 V output with ±0.1% initial tolerance (A grade), 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to +125°C and requires no output capacitor-used in automotive sensor signal conditioning and high-accuracy ADC biasing.
For engineers reviewing the LM4040QDEM3-2.5/NOPB datasheet, LM4040QDEM3-2.5/NOPB pinout, LM4040QDEM3-2.5/NOPB application, or LM4040QDEM3-2.5/NOPB equivalent, key selection criteria include its automotive-grade qualification, SOT-23-3 package compatibility, low dynamic impedance (0.8 Ω), thermal hysteresis (0.08%), and guaranteed stability with capacitive loads.
Technical Context
The LM4040QDEM3-2.5/NOPB implements a trimmed Zener-based shunt architecture with bandgap temperature drift curvature correction, enabling tight voltage accuracy across extended temperature ranges. Its fuse-and-Zener-zap wafer-sort trimming ensures ±0.1% output tolerance at 25°C for A-grade units.
It functions as a two-terminal device: cathode accepts reverse current to regulate voltage at the anode node, with no ground reference required. The design tolerates arbitrary capacitive loading and eliminates need for external stabilization capacitors-simplifying layout in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal; fixed reverse breakdown voltage optimized for 12-bit+ ADC reference and sensor excitation. |
| Initial Tolerance | ±0.1% at 25°C (A grade); enables single-point calibration in production test without trimming. |
| Temp Coefficient | ≤100 ppm/°C max (−40°C to +125°C); ensures ≤±19 mV total drift over full automotive range. |
| Noise (10Hz–10kHz) | 35 μVrms; supports low-noise analog front-ends in field transmitters and data acquisition systems. |
| Operating Current | 60 μA to 15 mA; ultra-low minimum current allows operation in battery-backed or energy-harvesting circuits. |
| Dynamic Impedance | 0.8 Ω typical at 1 mA; maintains regulation under fast load transients in motor control feedback paths. |
| Thermal Hysteresis | 0.08% (−40°C ↔ +125°C cycling); preserves long-term measurement repeatability in thermal-cycling environments. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 1.0 mm max height, gull-wing leads. RoHS-compliant, lead-free, and qualified per AEC-Q100 Grade 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current input and regulated output node; connects to supply rail via series resistor and to load reference point. |
| Anode (Pin 2) | O | Ground reference terminal; must be connected to system ground or low-impedance return path. |
| NC (Pin 3) | - | No-connect; internally unconnected; must float or tie to anode per EMI mitigation guidance in high-noise automotive layouts. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation in safety-critical automotive ECUs and ADAS sensors. |
| No external capacitor required | Stable under all capacitive loads up to 10 μF; eliminates BOM cost and PCB area for decoupling caps. |
| Low 35 μVrms noise | Enables <16-bit effective resolution in precision data acquisition without additional filtering. |
| 60 μA minimum operating current | Supports ultra-low-power wake-up circuits and always-on monitoring in vehicle body controllers. |
| 0.8 Ω dynamic impedance | Minimizes output voltage shift during digital I/O switching events in mixed-signal automotive modules. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Field Transmitter |
|---|---|
Use Scenario: Providing stable 2.5 V reference for oxygen sensor signal conditioning and knock detection ADCs. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise bias point for analog front-end amplifiers and 12-bit SAR ADCs. Use Value: Maintains ±0.1% reference accuracy across engine bay thermal cycles, ensuring consistent air-fuel ratio calculation. |
Use Scenario: Supplying reference voltage to 4–20 mA loop-powered pressure and temperature transmitters. IC Role / Device Role / Timing Role: Two-terminal shunt regulator setting excitation voltage for bridge sensors and scaling DAC outputs. Use Value: Enables loop power budget headroom via 60 μA min current, while 100 ppm/°C TC avoids recalibration in outdoor installations. |
| Energy Infrastructure Metering | Medical Patient Monitoring |
Use Scenario: Reference source for polyphase electricity metering ICs measuring voltage, current, and power harmonics. IC Role / Device Role / Timing Role: Precision shunt reference for metrology-grade sigma-delta ADCs sampling at 8 kSPS. Use Value: 35 μVrms noise and 0.08% thermal hysteresis ensure Class 0.2 metering compliance over 20-year field life. |
Use Scenario: Biasing analog front-end of portable ECG and pulse oximeter devices requiring FDA-grade signal fidelity. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference for instrumentation amplifiers and anti-alias filters. Use Value: AEC-Q100 qualification provides proven reliability foundation; ±0.1% tolerance reduces gain calibration steps in production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | 2.5 V, ±0.5% initial tolerance, 75 ppm/°C max TC, SOT-23-3, non-automotive qualified. | Lacks AEC-Q100 Grade 1 rating; suitable for industrial but not safety-critical automotive use. | Select when cost sensitivity outweighs automotive qualification and tighter tolerance is acceptable. |
| MAX6002AEUR+T | 2.5 V, ±0.2% initial tolerance, 50 ppm/°C max TC, SOT-23-3, automotive-qualified (AEC-Q100 Grade 2). | Grade 2 (−40°C to +105°C) only; not rated for full Grade 1 extended temperature range. | Choose where ambient temperature stays below +105°C and lower TC is prioritized over max operating range. |
Compared with TL4050C25IDBZR and MAX6002AEUR+T, the LM4040QDEM3-2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, ±0.1% tolerance, and guaranteed stability with capacitive loads-making it the only option qualified for under-hood engine control and ADAS sensor reference duties.
Availability
LM4040QDEM3-2.5/NOPB is available at Aetrix Electronics and suitable for automotive engine control, industrial field transmitters, energy metering, and medical patient monitoring requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for LM4040QDEM3-2.5/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, embedded processing, and high-reliability components for automotive, industrial, and communications markets.
The LM4040-N/Q1 family delivers precision shunt references engineered for space-constrained, high-stability applications including automotive sensor interfaces, industrial process control, and portable medical instrumentation.
FAQ
What is the maximum operating temperature range for the LM4040QDEM3-2.5/NOPB?
The LM4040QDEM3-2.5/NOPB is AEC-Q100 Grade 1 qualified, supporting continuous operation from −40°C to +125°C ambient temperature. This rating is verified per automotive stress testing standards and applies to the full electrical specification-including ±0.1% initial tolerance and 100 ppm/°C temperature coefficient-across the entire range.
Does the LM4040QDEM3-2.5/NOPB require an external output capacitor?
No, the LM4040QDEM3-2.5/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load up to 10 μF, eliminating the need for external compensation and reducing bill-of-materials count in automotive and industrial designs.
What is the minimum operating current for the LM4040QDEM3-2.5/NOPB?
The LM4040QDEM3-2.5/NOPB has a minimum operating current of 60 μA at 25°C, increasing to 65 μA over the full −40°C to +125°C temperature range. This ultra-low current enables use in always-on vehicle subsystems and battery-operated field instruments.
How is pin 3 (NC) used in the LM4040QDEM3-2.5/NOPB SOT-23 package?
In the LM4040QDEM3-2.5/NOPB SOT-23 package, pin 3 is a no-connect terminal. TI recommends leaving it floating or connecting it to the anode (pin 2) in high-EMI environments-such as near ignition coils or DC-DC converters-to reduce noise coupling into the reference node.
Is the LM4040QDEM3-2.5/NOPB compatible with standard SOT-23 footprints?
Yes, the LM4040QDEM3-2.5/NOPB uses the industry-standard DBZ (SOT-23-3) package with 2.92 mm × 1.30 mm body dimensions and 0.95 mm lead pitch. It is mechanically and solder-reflow compatible with common SOT-23 land patterns defined in IPC-7351B.
LM4040QDEM3-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QDEM3-2.5/NOPB FAQ
1.How can I place an order for LM4040QDEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QDEM3-2.5/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 LM4040QDEM3-2.5/NOPB reliable?
The price and inventory of LM4040QDEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QDEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QDEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QDEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QDEM3-2.5/NOPB?
LM4040QDEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QDEM3-2.5/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 LM4040QDEM3-2.5/NOPB?
For technical support, including LM4040QDEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QDEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QDEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QDEM3-2.5/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 LM4040QDEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QDEM3-2.5/NOPB?
All LM4040QDEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QDEM3-2.5/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 LM4040QDEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QDEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040QDEM3-2.5/NOPB Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
