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Texas Instruments LM4040CIM3-8.2/NOPB
- Part No.:
- LM4040CIM3-8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,121
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Product details
Overview
LM4040CIM3-8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 8.2 V reverse breakdown voltage with ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and stable operation from 91 μA to 15 mA over −40°C to +85°C. It serves as a compact, capacitor-free reference in analog signal chains for data acquisition and industrial sensing.
For engineers reviewing the LM4040CIM3-8.2/NOPB datasheet, LM4040CIM3-8.2/NOPB pinout, LM4040CIM3-8.2/NOPB application, or LM4040CIM3-8.2/NOPB equivalent, key selection criteria include its guaranteed 8.2 V output at 100 μA minimum current, low 35 μVrms noise (10 Hz–10 kHz), no-output-capacitor requirement, and SOT-23 thermal performance (RθJA = 291.9°C/W).
Technical Context
The LM4040CIM3-8.2/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% accuracy at 25°C and integrates bandgap-derived curvature correction for stable voltage over temperature. Its shunt topology requires an external series resistor but eliminates need for output capacitance while tolerating arbitrary capacitive loads.
It operates across 91 μA–15 mA reverse current, with dynamic impedance of 0.3–0.9 Ω at 1 mA, enabling high PSRR and low load regulation error (<8 mV over full current range). The device meets AEC-Q100 Grade 3 requirements for automotive use and supports industrial-grade reliability with 120 ppm long-term stability after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.2 V nominal reverse breakdown voltage, specified at 100 μA test current |
| Initial Tolerance | ±0.5% (C grade) at 25°C - enables direct use without calibration in mid-precision systems |
| Temp Coefficient | ≤100 ppm/°C - ensures ≤±5.3 mV drift over −40°C to +85°C ambient |
| Min Operating Current | 91 μA - sets minimum bias resistor value for given supply voltage |
| Noise (10 Hz–10 kHz) | 35 μVrms - supports high-resolution ADC references without added filtering |
| Dynamic Impedance | 0.3–0.9 Ω at 1 mA - provides tight load regulation and immunity to current transients |
| Long-Term Stability | 120 ppm after 1000 hrs - ensures minimal drift in field-deployed instrumentation |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 1.0 mm max height, gull-wing leads, JEDEC MO-178 compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connected to regulated voltage rail; sinks all current not drawn by load |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for output |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per EMI mitigation guidance |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts and eliminates capacitor aging/failure modes |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or long traces without oscillation risk |
| Micropower operation | 91 μA minimum current allows battery-powered sensor nodes with multi-year runtime |
| Stable over wide current range | 0.3–0.9 Ω dynamic impedance maintains regulation from 91 μA to 15 mA |
| AEC-Q100 qualified | Grade 3 (−40°C to +85°C) certification validates suitability for automotive ECUs and infotainment |
Applications
| Field Transmitters | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter in oil & gas wellhead monitoring. IC Role / Device Role / Timing Role: Shunt voltage reference for DAC output scaling and sensor excitation circuitry. Use Value: 8.2 V output enables precise 2.5 V or 5 V rail generation via resistive divider; ±0.5% tolerance avoids field recalibration. | Use Scenario: Smart meter voltage measurement front-end with isolation and anti-tampering features. IC Role / Device Role / Timing Role: Precision reference for 24-bit sigma-delta ADC measuring phase-to-phase voltages. Use Value: 35 μVrms noise ensures <0.001% measurement uncertainty; 100 ppm/°C TC supports Class 0.2 accuracy across outdoor temperature swings. |
| Data Acquisition | Analog Input Module |
Use Scenario: Industrial PLC analog input card acquiring thermocouple, RTD, and 4–20 mA signals. IC Role / Device Role / Timing Role: Common reference for multiplexed ADC channel calibration and gain-setting DACs. Use Value: Stable 8.2 V output allows consistent 16-bit+ ENOB across channels; 120 ppm long-term stability reduces annual calibration frequency. | Use Scenario: Modular I/O system with hot-swappable analog input modules for factory automation. IC Role / Device Role / Timing Role: Local reference source per module to eliminate backplane voltage drop errors. Use Value: SOT-23 footprint minimizes board area; no-output-capacitor design simplifies layout and improves module interchangeability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.495 V reference; requires two external resistors for 8.2 V; higher 22 Ω dynamic impedance | Less accurate at 8.2 V due to resistor tolerance stacking; unsuitable for ultra-low-noise designs | Select when adjustable output or higher current capability (up to 100 mA) is needed; avoid where 35 μVrms noise is critical |
| MAX6008AEUR+T | Fixed 8.192 V output; ±0.2% initial accuracy; SC70-3 package; 20 μVrms noise | Higher precision and lower noise, but only rated for −40°C to +85°C industrial grade (no AEC-Q100) | Select for metrology-grade data loggers where noise and accuracy outweigh automotive qualification needs |
Compared with TL431CDBZR and MAX6008AEUR+T, the LM4040CIM3-8.2/NOPB offers the only combination of fixed 8.2 V output, AEC-Q100 Grade 3 qualification, SOT-23 footprint, and guaranteed 35 μVrms noise-making it optimal for space- and reliability-constrained automotive and industrial analog front-ends.
Availability
LM4040CIM3-8.2/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure meters, and analog input modules requiring stable component supply with automotive-grade reliability and low-noise performance.
Supply support for LM4040CIM3-8.2/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-qualified components.
The LM4040-N product line delivers micropower shunt voltage references optimized for space-constrained, low-drift applications in industrial sensing, automotive ECUs, and portable instrumentation-prioritizing accuracy, thermal stability, and ease of use without external capacitors.
FAQ
What is the minimum operating current for LM4040CIM3-8.2/NOPB?
The LM4040CIM3-8.2/NOPB requires a minimum reverse current of 91 μA at 25°C to maintain regulation within specification. This value increases slightly over temperature, reaching 95 μA at +85°C. Designers must size the series bias resistor to ensure this current is always met under worst-case supply and load conditions. The LM4040CIM3-8.2/NOPB will not regulate properly below this threshold.
Does LM4040CIM3-8.2/NOPB require an output capacitor?
No, the LM4040CIM3-8.2/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external capacitance, unlike many older shunt references. It remains stable even with large capacitive loads (e.g., ADC input capacitors or long PCB traces), simplifying layout and improving reliability in noisy environments.
What is the temperature coefficient of LM4040CIM3-8.2/NOPB?
The LM4040CIM3-8.2/NOPB has a maximum average temperature coefficient of 100 ppm/°C over the industrial temperature range (−40°C to +85°C). This means its output voltage drift is bounded to ±0.068 V across that range, supporting applications where reference stability is critical without active temperature compensation.
Is LM4040CIM3-8.2/NOPB AEC-Q100 qualified?
Yes, the LM4040CIM3-8.2/NOPB is AEC-Q100 qualified as Grade 3 (−40°C to +85°C ambient), making it suitable for automotive applications including body control modules, infotainment power supplies, and sensor interfaces. It meets stress testing requirements for humidity, temperature cycling, and ESD per AEC-Q100 Rev H.
What package type does LM4040CIM3-8.2/NOPB use?
The LM4040CIM3-8.2/NOPB uses the SOT-23-3 (DBZ) package: a 3-pin surface-mount outline measuring 2.92 mm × 1.30 mm with gull-wing leads. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC (no connect), which may be left floating or tied to Pin 2 for EMI suppression in noisy environments.
LM4040CIM3-8.2/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):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 130µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3-8.2/NOPB FAQ
1.How can I place an order for LM4040CIM3-8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-8.2/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 LM4040CIM3-8.2/NOPB reliable?
The price and inventory of LM4040CIM3-8.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-8.2/NOPB?
LM4040CIM3-8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-8.2/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 LM4040CIM3-8.2/NOPB?
For technical support, including LM4040CIM3-8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-8.2/NOPB requirements.
6.How does Aetrix verify that LM4040CIM3-8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-8.2/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 LM4040CIM3-8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-8.2/NOPB?
All LM4040CIM3-8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-8.2/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 LM4040CIM3-8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIM3-8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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