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Texas Instruments LM4040AIM3X-4.1/NOPB
- Part No.:
- LM4040AIM3X-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3X-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,369
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Product details
Overview
LM4040AIM3X-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 4.096 V reverse breakdown voltage with ±0.1% initial tolerance (A grade) at 25°C, 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 68 μA to 15 mA over −40°C to +85°C and requires no output capacitor.
For engineers reviewing the LM4040AIM3X-4.1/NOPB datasheet, LM4040AIM3X-4.1/NOPB pinout, LM4040AIM3X-4.1/NOPB application, or LM4040AIM3X-4.1/NOPB equivalent, key selection criteria include shunt reference stability under capacitive loads, low-current operation in space-constrained analog signal chains, and AEC-Q100 Grade 3 qualification for industrial and automotive sensing systems.
Technical Context
The LM4040AIM3X-4.1/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 (0.3–0.8 Ω) ensures stable regulation across load current changes from 68 μA to 15 mA.
Unlike series references, this shunt device functions as a two-terminal voltage sink: cathode supplies regulated voltage while anode connects to system ground. It tolerates unlimited capacitive loading and eliminates need for external stabilization components-enabling direct integration into high-precision ADC biasing, sensor excitation, and field transmitter calibration circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - matches common 12-bit DAC/ADC full-scale scaling (e.g., 4096 LSB = 4.096 V). |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables single-point calibration in high-accuracy measurement front-ends without trimming. |
| Temp Coefficient | ≤100 ppm/°C - limits voltage drift to ±0.83 mV over −40°C to +85°C ambient range. |
| Operating Current | 68 μA to 15 mA - supports ultra-low-power sensor nodes and robust industrial current-loop interfaces. |
| Noise (10 Hz–10 kHz) | 35 μVrms - contributes <0.001% of full-scale error in 4.096 V-referenced 16-bit data acquisition. |
| Dynamic Impedance | 0.3–0.8 Ω - maintains regulation accuracy despite rapid load transients in closed-loop feedback paths. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178 compatible. Anode grounded, cathode delivers regulated voltage, and 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 input / output node | Regulated 4.096 V appears here; sinks all current not drawn by load - must be connected via series resistor to supply rail. |
| Anode (Pin 2) | Reference ground terminal | Internally connected to system ground; establishes return path for shunt current and defines voltage reference point. |
| NC (Pin 3) | No-connect terminal | Not internally bonded; TI recommends leaving floating or connecting to Pin 2 (anode) in high-noise environments to reduce EMI susceptibility. |
Key Features
| Feature | Design Value |
|---|---|
| Zener-zap voltage trim | Ensures ±0.1% initial accuracy without post-package calibration - reduces test time and BOM cost in volume production. |
| Capacitive-load tolerance | Stable with any output capacitance - eliminates need for isolation resistors or damping networks in ADC reference buffers. |
| No external capacitor required | Internal compensation enables immediate use in footprint-constrained layouts - ideal for SC70/SOT-23 PCB real estate optimization. |
| AEC-Q100 Grade 3 qualified | Validated for −40°C to +85°C operation with automotive-grade reliability - suitable for engine control, battery monitoring, and ADAS sensor modules. |
Applications
| Field Transmitters | Data Acquisition |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter with HART modulation. IC Role / Device Role / Timing Role: Shunt reference providing excitation voltage for bridge sensors and reference for 16-bit SAR ADC. Use Value: 4.096 V output enables exact 1 mV/LSB scaling; ±0.1% tolerance avoids factory calibration per unit. | Use Scenario: Portable multichannel data logger sampling thermocouples and RTDs. IC Role / Device Role / Timing Role: Precision reference for delta-sigma ADC and programmable gain instrumentation amplifier. Use Value: 35 μVrms noise and 100 ppm/°C TC ensure <12-bit effective resolution across operating temperature range. |
| Analog Input Module | Automotive Sensing |
Use Scenario: DIN-rail mounted PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple inputs. IC Role / Device Role / Timing Role: Common reference source for multiplexed signal conditioning channels and isolation amplifiers. Use Value: Low 68 μA minimum current allows shared biasing across multiple channels without significant power penalty. | Use Scenario: EV battery pack cell voltage monitor with isolated CAN interface. IC Role / Device Role / Timing Role: Reference for 12-bit ADC measuring individual Li-ion cell voltages (2.5–4.3 V range). Use Value: AEC-Q100 Grade 3 rating and 4.096 V output support ASIL-B functional safety requirements for voltage monitoring accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C41IDBZR | 4.096 V, ±0.5% initial tolerance (C grade), 75 ppm/°C max TC, SOT-23 package | Lower accuracy and higher tempco - suitable where calibration is performed or wider error budget exists | Select when cost sensitivity outweighs need for ±0.1% accuracy and long-term stability. |
| REF43G40IDBVR | 4.096 V, ±0.05% initial tolerance, 3 ppm/°C max TC, 1.2 μVrms noise, but series topology requiring external capacitor | Higher precision and lower noise, but larger solution size and higher quiescent current (120 μA min) | Select for metrology-grade applications where 0.05% accuracy and sub-ppm/°C drift justify added complexity and cost. |
Compared with TL4050C41IDBZR, LM4040AIM3X-4.1/NOPB offers tighter initial tolerance and better thermal stability; compared with REF43G40IDBVR, it trades absolute precision for smaller footprint, zero external components, and micropower operation - making it optimal for compact, uncalibrated industrial sensor nodes.
Availability
LM4040AIM3X-4.1/NOPB is available at Aetrix Electronics and suitable for field transmitters, data acquisition systems, and automotive sensing applications requiring stable component supply, long-lifecycle availability, and AEC-Q100 compliance.
Supply support for LM4040AIM3X-4.1/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-grade components.
The LM4040-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications including industrial process control, automotive sensor interfaces, and portable instrumentation.
FAQ
What is the minimum operating current for LM4040AIM3X-4.1/NOPB?
The LM4040AIM3X-4.1/NOPB requires a minimum operating current of 68 μA at 25°C to maintain regulation within specification. This value increases slightly over temperature, reaching up to 73 μA across the full −40°C to +85°C industrial range. Below this threshold, the device may not sustain its rated 4.096 V output or specified tolerance.
Is LM4040AIM3X-4.1/NOPB AEC-Q100 qualified?
Yes, LM4040AIM3X-4.1/NOPB is AEC-Q100 Grade 3 qualified for automotive applications, supporting operation from −40°C to +85°C. It meets stress testing requirements for temperature cycling, humidity, and ESD (±2000 V HBM), making it suitable for non-safety-critical automotive subsystems such as cabin sensors and body control modules.
Does LM4040AIM3X-4.1/NOPB require an output capacitor?
No, LM4040AIM3X-4.1/NOPB does not require an external output capacitor. Its internal design provides inherent stability with any capacitive load, eliminating the need for external compensation components - simplifying layout and reducing bill-of-materials count in space-sensitive designs.
What is the thermal hysteresis specification for LM4040AIM3X-4.1/NOPB?
The LM4040AIM3X-4.1/NOPB exhibits 0.08% thermal hysteresis, defined as the voltage difference measured at 25°C after thermal cycling from −40°C and from +125°C. This low hysteresis ensures repeatable reference performance in systems subject to repeated temperature excursions, such as outdoor industrial controllers.
How does the LM4040AIM3X-4.1/NOPB pinout differ from the SC70 version?
The LM4040AIM3X-4.1/NOPB uses the SOT-23 (DBZ) package with cathode on Pin 1, anode on Pin 2, and NC on Pin 3. In contrast, the SC70 (DCK) variant places cathode on Pin 3, anode on Pin 1, and has two NC pins (4 and 5). PCB layouts are not interchangeable - mechanical and electrical pin mapping must be verified per package drawing.
LM4040AIM3X-4.1/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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AIM3X-4.1/NOPB FAQ
1.How can I place an order for LM4040AIM3X-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3X-4.1/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 LM4040AIM3X-4.1/NOPB reliable?
The price and inventory of LM4040AIM3X-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIM3X-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040AIM3X-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3X-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3X-4.1/NOPB?
LM4040AIM3X-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3X-4.1/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 LM4040AIM3X-4.1/NOPB?
For technical support, including LM4040AIM3X-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3X-4.1/NOPB requirements.
6.How does Aetrix verify that LM4040AIM3X-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3X-4.1/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 LM4040AIM3X-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040AIM3X-4.1/NOPB?
All LM4040AIM3X-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3X-4.1/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 LM4040AIM3X-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4040AIM3X-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3X-4.1/NOPB Tags
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