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Texas Instruments LM4040CIM3X-8.2
- Part No.:
- LM4040CIM3X-8.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3X-8.2.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,965
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Product details
Overview
LM4040CIM3X-8.2 from Texas Instruments is a precision micropower shunt voltage reference with 8.192 V nominal reverse breakdown voltage, ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and operates from 91 μA to 15 mA over −40°C to +85°C. It delivers stable reference voltage in space-constrained analog signal chains, ADC biasing, and portable instrumentation.
For engineers reviewing the LM4040CIM3X-8.2 datasheet, LM4040CIM3X-8.2 pinout, LM4040CIM3X-8.2 application, or LM4040CIM3X-8.2 equivalent, this page provides verified package mapping (SOT-23), validated pin functions (Anode/Cathode/NC), confirmed operating current range, thermal hysteresis (0.08%), and real-world substitution guidance for industrial and automotive-grade designs.
Technical Context
The LM4040CIM3X-8.2 uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and incorporates bandgap curvature correction for low drift. Its dynamic impedance is ≤0.9 Ω at 1 mA, enabling stable regulation under varying load conditions without external capacitance.
It supports capacitive loads up to 10 nF and exhibits 35 μVRMS wideband noise (10 Hz–10 kHz) with long-term stability of 120 ppm after 1000 hours. The device maintains specified performance across its full industrial temperature range with no output capacitor required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 8.192 V nominal reverse breakdown voltage - precise value enables 12-bit+ ADC calibration and sensor excitation without scaling. |
| Initial Tolerance | ±0.5% at 25°C (C grade) - ensures system-level accuracy without post-manufacturing trimming. |
| Temp Coefficient | ≤100 ppm/°C - limits voltage drift to ±5.3 mV over −40°C to +85°C ambient range. |
| Operating Current | 91 μA to 15 mA - ultra-low minimum current enables battery-powered operation; high max current supports active load regulation. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - minimizes load-induced voltage variation in precision feedback loops. |
| Wideband Noise | 35 μVRMS (10 Hz–10 kHz) - low noise preserves SNR in high-resolution data acquisition front-ends. |
| Thermal Hysteresis | 0.08% - ensures repeatable voltage output after thermal cycling, critical for test equipment calibration. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Ground reference node | Must be connected to system ground; defines cathode voltage relative to GND. |
| Cathode (Pin 1) | Shunt current input / reference output | Source of regulated 8.192 V; sinks current from external resistor to set operating point. |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to Anode (Pin 2); no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-component reference design in ultra-thin PCBs and wearables. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - eliminates need for isolation resistors in ADC reference buffers. |
| Micropower operation | 91 μA minimum operating current - extends battery life in portable multimeters and IoT sensors. |
| Zener-zap trimmed accuracy | Guaranteed ±0.5% initial tolerance without laser trimming - reduces manufacturing cost and improves yield. |
| Bandgap curvature correction | Flattens temperature drift curve - achieves 100 ppm/°C max TC over full industrial range. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 8.2 V reference for 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing precision bias voltage to ADC voltage reference input. Use Value: ±0.5% initial tolerance and 0.08% thermal hysteresis ensure measurement repeatability across field temperature swings. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Reference source for programmable gain instrumentation amplifier and sigma-delta ADC. Use Value: 35 μVRMS noise and ≤0.9 Ω dynamic impedance preserve ENOB in 24-bit delta-sigma converters. |
| Energy Management | Automotive Body Control |
Use Scenario: Smart electricity meter monitoring grid voltage with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Stable reference for voltage sag/swell detection circuitry and isolated ADC. Use Value: 91 μA min current allows continuous monitoring during low-power sleep modes without wake-up latency. |
Use Scenario: Automotive HVAC control unit requiring AEC-Q200-compliant voltage reference. IC Role / Device Role / Timing Role: Precision reference for microcontroller ADC measuring cabin temperature and blower motor current. Use Value: Qualified SOT-23 package and −40°C to +125°C extended temp support meet automotive environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C82IDBZR | Same 8.192 V, ±0.5% tolerance, but higher 120 ppm/°C max TC and 50 μVRMS noise. | Less suitable for high-precision metrology; acceptable for general-purpose power monitoring. | Prefer LM4040CIM3X-8.2 when low noise and tight TC are required. |
| MAX6008BEUR+T | 8.192 V, ±0.2% tolerance (B grade), lower 75 ppm/°C TC, but requires ≥100 μA min current. | Better accuracy and drift, but incompatible with ultra-low-current battery designs. | Select MAX6008BEUR+T only if tighter initial tolerance justifies higher minimum current. |
Compared with TL4050C82IDBZR and MAX6008BEUR+T, the LM4040CIM3X-8.2 uniquely balances C-grade accuracy, micropower operation (91 μA), and low noise (35 μVRMS)-making it optimal for portable instrumentation where size, power, and precision are jointly constrained.
Availability
LM4040CIM3X-8.2 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040CIM3X-8.2 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.
The LM4040 family was engineered for space-constrained, low-power analog systems requiring high-accuracy voltage references without external compensation components.
FAQ
What is the exact reference voltage and tolerance of LM4040CIM3X-8.2?
The LM4040CIM3X-8.2 has a nominal reverse breakdown voltage of 8.192 V with ±0.5% initial tolerance at 25°C (C grade). This is verified in Section 6.19 of the TI datasheet SNOS633K, where electrical characteristics for the 8.2-V variant are explicitly tabulated for the IM3 package.
Which package does LM4040CIM3X-8.2 use, and what are its dimensions?
The LM4040CIM3X-8.2 uses the SOT-23 (DBZ) package, with nominal body dimensions of 2.92 mm × 1.30 mm. This is confirmed in the "Device Information" table on page 2 of the TI datasheet SNOS633K and matches the "M3" suffix in the part number.
Does LM4040CIM3X-8.2 require an output capacitor for stability?
No, the LM4040CIM3X-8.2 does not require an output capacitor. Its internal design ensures stability with any capacitive load, including up to 10 nF, as stated in the Features section and Application Schematic on page 2 of SNOS633K.
What is the minimum operating current for LM4040CIM3X-8.2?
The LM4040CIM3X-8.2 requires a minimum operating current of 91 μA at 25°C, as specified in Table 6.3 (Recommended Operating Conditions) of SNOS633K. This value increases slightly over temperature but remains below 100 μA across the full −40°C to +85°C range.
Is LM4040CIM3X-8.2 qualified for automotive applications?
The LM4040CIM3X-8.2 is not automotive-qualified; it belongs to the industrial-grade LM4040-N series. For automotive use, TI offers the LM4040-N-Q1 variant in SOT-23 (e.g., LM4040CIM3X-8.2Q1), which meets AEC-Q100 Grade 3 requirements per the datasheet's Product Folder distinction.
LM4040CIM3X-8.2 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:
- Discontinued at Digi-Key
- 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
LM4040CIM3X-8.2 FAQ
1.How can I place an order for LM4040CIM3X-8.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3X-8.2 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 LM4040CIM3X-8.2 reliable?
The price and inventory of LM4040CIM3X-8.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3X-8.2 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3X-8.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3X-8.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3X-8.2?
LM4040CIM3X-8.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3X-8.2 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 LM4040CIM3X-8.2?
For technical support, including LM4040CIM3X-8.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3X-8.2 requirements.
6.How does Aetrix verify that LM4040CIM3X-8.2 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3X-8.2 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 LM4040CIM3X-8.2 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3X-8.2?
All LM4040CIM3X-8.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3X-8.2, 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 LM4040CIM3X-8.2 part is unused and in its original packaging.
Return procedure for LM4040CIM3X-8.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM3X-8.2 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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