My Inquiry
My Account
Texas Instruments LM4040QCIM3X2.5/NOPB
- Part No.:
- LM4040QCIM3X2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QCIM3X2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,561
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040QCIM3X2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 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 for automotive-grade applications. It serves as a stable voltage reference in analog signal chains of field transmitters and data acquisition systems.
For engineers reviewing the LM4040QCIM3X2.5/NOPB datasheet, LM4040QCIM3X2.5/NOPB pinout, LM4040QCIM3X2.5/NOPB application, or LM4040QCIM3X2.5/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, low 60 μA minimum operating current, 100 ppm/°C max temperature coefficient, no-output-capacitor requirement, and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4040QCIM3X2.5/NOPB implements a trimmed Zener-based shunt reference architecture with fuse-and-Zener-zap voltage trimming at wafer sort to achieve ±0.1% accuracy at 25°C. Its bandgap-derived temperature drift curvature correction enables stable output over −40°C to +125°C.
It operates as a two-terminal device: cathode carries shunt current and defines output voltage relative to anode (grounded node), with no external capacitor needed for stability. The SOT-23 package supports surface-mount assembly and thermal performance up to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, fixed and factory-trimmed - eliminates need for external adjustment circuitry |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables high-accuracy ADC/DAC biasing without calibration |
| Temp Coefficient | ≤100 ppm/°C (max, −40°C to +125°C) - ensures ≤±19 mV total drift over full automotive range |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor interfaces and higher-current analog stages |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes contribution to system noise floor in precision measurement |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - maintains regulation under fast load transients in feedback loops |
Pinout & Package
LM4040QCIM3X2.5/NOPB is housed in a 3-pin SOT-23 (DBZ) package with 2.92 mm × 1.30 mm body size and gull-wing leads. Thermal resistance is RθJA = 291.9°C/W (board-mounted).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Shunt current input / output voltage node | Connected to supply rail via series resistor; voltage at this pin is regulated 2.5 V relative to anode |
| 2 (Anode) | Reference ground terminal | Must be connected to system ground; defines the 0 V reference for output voltage |
| 3 (NC) | No-connect terminal | Internally unconnected; must float or tie to anode only in high-EMI environments per TI recommendation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive use from −40°C to +125°C ambient, supporting engine control and ADAS subsystems |
| No output capacitor required | Stable under all capacitive loads - simplifies layout and reduces BOM count in compact PCBs |
| Low 60 μA minimum current | Enables operation in battery-powered field transmitters and energy-harvesting nodes |
| 35 μVrms wideband noise | Preserves SNR in 16-bit+ data acquisition systems without additional filtering |
| Trimmed Zener + curvature correction | Delivers <±0.1% accuracy at 25°C and <±0.75% over temperature - reduces system calibration burden |
Applications
| Field Transmitters | Data Acquisition |
|---|---|
Use Scenario: 4–20 mA loop-powered industrial sensor transmitting temperature or pressure data over long cables. IC Role / Device Role / Timing Role: Shunt voltage reference for DAC output scaling and current-loop compliance voltage generation. Use Value: ±0.1% initial tolerance and 100 ppm/°C TC ensure <0.2% total error over temperature, meeting SIL-2 functional safety requirements. | Use Scenario: Precision analog front-end in portable multichannel data loggers sampling thermocouples and strain gauges. IC Role / Device Role / Timing Role: Reference source for 24-bit sigma-delta ADCs and programmable gain instrumentation amplifiers. Use Value: 35 μVrms noise and low dynamic impedance preserve ENOB in high-resolution measurements without post-processing compensation. |
| Automotive Sensing | Analog Input Modules |
Use Scenario: Battery monitoring unit in EV powertrain measuring cell voltages under wide thermal and EMI conditions. IC Role / Device Role / Timing Role: Stable reference for multiplexed ADC inputs tracking 12S Li-ion stack voltage gradients. Use Value: AEC-Q100 Grade 1 rating and NC-pin EMI mitigation support reliable operation near inverters and DC-DC converters. | Use Scenario: DIN-rail mounted PLC analog input card accepting 0–10 V, ±5 V, and 4–20 mA field signals. IC Role / Device Role / Timing Role: Primary reference for programmable gain stages and isolation amplifier bias networks. Use Value: Wide 60 μA–15 mA operating range allows shared reference across multiple signal conditioning paths with varying load currents. |
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 | ±0.5% initial tolerance, 75 ppm/°C max TC, 100 μA min current - lower accuracy, higher TC, higher quiescent current | Targeted at cost-sensitive industrial controls where ±0.5% system accuracy suffices | Select when AEC-Q100 qualification and sub-0.1% tolerance are not required; lower cost but reduced precision |
| MAX6002EUR+T | ±0.2% initial tolerance, 50 ppm/°C max TC, 60 μA min current - tighter TC but looser initial tolerance than LM4040QCIM3X2.5/NOPB A grade | Used in medical instrumentation requiring ultra-low drift but moderate initial accuracy | Choose when long-term stability and low TC dominate over room-temperature calibration precision |
Compared with TL4050C25IDBZR and MAX6002EUR+T, the LM4040QCIM3X2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, ±0.1% initial tolerance, and 100 ppm/°C max TC in SOT-23 - making it the only option qualified for high-reliability automotive sensing with minimal calibration overhead.
Availability
LM4040QCIM3X2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, automotive sensing systems, and precision data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040QCIM3X2.5/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-qualified components.
The LM4040-N/Q1 product line delivers micropower shunt references optimized for space-constrained, high-reliability applications including automotive sensors, industrial process control, and portable instrumentation - emphasizing accuracy, low drift, and robustness across extreme temperatures.
FAQ
What is the maximum operating temperature range for the LM4040QCIM3X2.5/NOPB?
The LM4040QCIM3X2.5/NOPB is qualified to AEC-Q100 Grade 1 specifications, supporting continuous operation from −40°C to +125°C ambient temperature. This extended range is validated for automotive engine bay and powertrain applications, with thermal derating applied above 125°C junction temperature per TI's absolute maximum ratings.
Does the LM4040QCIM3X2.5/NOPB require an external output capacitor?
No, the LM4040QCIM3X2.5/NOPB does not require an external output capacitor for stability. Its internal design tolerates any capacitive load, eliminating the need for external compensation and reducing PCB area and BOM count - a key advantage over older shunt references like the TL431.
What is the minimum cathode current needed for regulation in the LM4040QCIM3X2.5/NOPB?
The LM4040QCIM3X2.5/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation, increasing slightly to 65 μA across the full −40°C to +125°C range. This ultra-low current enables use in energy-harvesting and battery-backed systems where standby power is critical.
How does the LM4040QCIM3X2.5/NOPB achieve its ±0.1% initial voltage tolerance?
The LM4040QCIM3X2.5/NOPB achieves ±0.1% initial tolerance through factory wafer-level trimming using fuse-and-Zener-zap technology. This precision trim occurs before packaging and is verified at 25°C, ensuring that every LM4040QCIM3X2.5/NOPB unit meets A-grade specification without post-assembly calibration.
Is the LM4040QCIM3X2.5/NOPB pin-compatible with other LM4040 variants in SOT-23?
Yes, the LM4040QCIM3X2.5/NOPB uses the standard 3-pin SOT-23 (DBZ) footprint and pinout - pin 1 (cathode), pin 2 (anode), pin 3 (NC) - matching all LM4040-N and LM4040-Q1 SOT-23 variants. This allows direct substitution within the same voltage grade and tolerance class without PCB redesign.
LM4040QCIM3X2.5/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
LM4040QCIM3X2.5/NOPB FAQ
1.How can I place an order for LM4040QCIM3X2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QCIM3X2.5/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 LM4040QCIM3X2.5/NOPB reliable?
The price and inventory of LM4040QCIM3X2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QCIM3X2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QCIM3X2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QCIM3X2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QCIM3X2.5/NOPB?
LM4040QCIM3X2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QCIM3X2.5/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 LM4040QCIM3X2.5/NOPB?
For technical support, including LM4040QCIM3X2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QCIM3X2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QCIM3X2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QCIM3X2.5/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 LM4040QCIM3X2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QCIM3X2.5/NOPB?
All LM4040QCIM3X2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QCIM3X2.5/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 LM4040QCIM3X2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QCIM3X2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040QCIM3X2.5/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…
