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Texas Instruments LM4040CIZ-8.2/NOPB
- Part No.:
- LM4040CIZ-8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040CIZ-8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,313
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Product details
Overview
LM4040CIZ-8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering 8.192 V nominal reverse breakdown voltage with ±0.5% initial tolerance (C grade) at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 91 μA to 15 mA. It serves as a compact, capacitor-free reference for ADC biasing, sensor excitation, and portable power monitoring circuits.
For engineers reviewing the LM4040CIZ-8.2/NOPB datasheet, LM4040CIZ-8.2/NOPB pinout, LM4040CIZ-8.2/NOPB application, or LM4040CIZ-8.2/NOPB equivalent, this page provides verified specifications, TO-92 terminal mapping, real-world use cases in battery-powered instrumentation and industrial data acquisition, and two validated alternative parts with documented parameter differences.
Technical Context
The LM4040CIZ-8.2/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy and incorporates bandgap curvature correction for low thermal drift. Its shunt topology requires an external current-limiting resistor and operates without output capacitance, tolerating any capacitive load up to 10 nF.
Designed for industrial temperature range (−40°C to +85°C), it maintains 8.192 V output across 91–15,000 μA operating current, with 0.8 mV typical load regulation below 1 mA and 6 mV up to 15 mA, plus 35 μVrms wideband noise (10 Hz–10 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 8.192 V - precise reference point for 12-bit+ ADCs and analog signal chains |
| Initial Tolerance | ±0.5% at 25°C - corresponds to ±41 mV absolute error, enabling high-accuracy calibration |
| Temp Coefficient | 100 ppm/°C max - ensures ≤±5.3 mV drift over −40°C to +85°C industrial range |
| Operating Current | 91 μA to 15 mA - supports ultra-low-power sensor nodes and high-current DAC references |
| Dynamic Impedance | 0.9 Ω typical - minimizes output voltage shift under dynamic load transients |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - suitable for precision measurement front-ends without added filtering |
| Long-Term Stability | 120 ppm after 1000 hrs - predictable aging behavior for field-deployed equipment |
Pinout & Package
LM4040CIZ-8.2/NOPB uses the 3-pin TO-92 package (LP variant), with body size 4.30 mm × 4.30 mm. Pin 1 is Cathode (shunt current input/output node), Pin 2 is Anode (ground reference), and Pin 3 is NC (no connect, must float or tie to Pin 2 per datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 (Cathode) | Shunt current path / output voltage node | Connects to regulated voltage rail; sinks all reference current; defines VOUT = 8.192 V relative to Anode |
| PIN 2 (Anode) | Ground reference terminal | Must be connected to system ground; forms the 0 V reference for cathode voltage |
| PIN 3 (NC) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts and eliminates capacitor aging/failure modes in long-life systems |
| Tolerates capacitive loads | Stable with up to 10 nF directly at cathode-supports RC filtering without oscillation risk |
| Fixed 8.192 V output | Matches binary-scaled reference needs for 13-bit systems (213 = 8192), simplifying digital calibration |
| Low 91 μA minimum current | Permits use with high-value current-setting resistors (>1 MΩ at 12 V supply), reducing quiescent power |
| AEC-Q100 Grade 3 qualified | Validated for automotive interior applications (−40°C to +85°C), including infotainment and body control modules |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and lithium coin-cell power source. IC Role / Device Role / Timing Role: Shunt reference providing stable 8.192 V for ADC full-scale range and sensor excitation. Use Value: Enables 13-bit effective resolution (8192 codes) while drawing only 91 μA, extending battery life beyond 1 year. |
Use Scenario: DIN-rail-mounted PLC analog input module measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision reference for current-to-voltage conversion and ADC reference in isolated signal conditioning stage. Use Value: 100 ppm/°C tempco ensures <±0.05% reading error across factory ambient variations (0–60°C). |
| Energy Monitoring Systems | Automotive Body Control |
Use Scenario: Smart electricity meter with metrology-grade ADC and anti-tampering detection. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ASIC requiring traceable accuracy. Use Value: ±0.5% initial tolerance and 120 ppm long-term stability meet IEC 62053-21 Class 0.5S requirements. |
Use Scenario: Automotive door module sensing window position via potentiometer wiper voltage. IC Role / Device Role / Timing Role: Stable reference for ratiometric ADC measurement of potentiometer output. Use Value: AEC-Q100 Grade 3 qualification ensures reliable operation across vehicle lifetime and temperature cycling. |
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 output, ±0.5% tolerance, but SOT-23-3 package (smaller footprint, higher thermal resistance) | Better suited for high-density PCBs; less suitable for through-hole prototyping or high-reliability mechanical mounting | Select when board space is constrained and reflow assembly is used; verify thermal derating at >10 mA load. |
| REF3030AIDBZR | 3.0 V output, not 8.192 V; series topology, requires output capacitor; 50 ppm/°C tempco; 50 μA quiescent current | Used where lower voltage reference is acceptable and supply headroom permits series configuration | Choose only if system redesign allows 3 V reference and capacitor addition; not a drop-in replacement for LM4040CIZ-8.2/NOPB. |
Compared with TL4050C82IDBZR and REF3030AIDBZR, LM4040CIZ-8.2/NOPB uniquely combines TO-92 mechanical robustness, exact 8.192 V binary-matched output, and zero-capacitor operation-making it optimal for legacy-compatible, high-stability, through-hole designs where layout flexibility and thermal margin are prioritized over miniaturization.
Availability
LM4040CIZ-8.2/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and energy monitoring systems requiring stable component supply with long lifecycle visibility and consistent parametric performance.
Supply support for LM4040CIZ-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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-qualified components.
LM4040CIZ-8.2/NOPB belongs to TI's precision shunt reference product line, engineered for metrology-grade accuracy, low-power operation, and robustness in industrial and automotive environments.
FAQ
What is the maximum operating current for LM4040CIZ-8.2/NOPB?
The LM4040CIZ-8.2/NOPB supports a maximum operating current of 15 mA. Exceeding this value risks exceeding the device's absolute maximum power dissipation (550 mW in TO-92), potentially causing thermal runaway or permanent damage. Designers must calculate power dissipation as P = VR × IR = 8.192 V × IR and ensure junction temperature remains below 125°C using the specified RθJA of 170°C/W (0.125″ lead length).
Does LM4040CIZ-8.2/NOPB require an external capacitor for stability?
No, LM4040CIZ-8.2/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to 10 nF bypass capacitors. This eliminates capacitor-related failure modes and simplifies layout-especially valuable in battery-powered and space-constrained applications where LM4040CIZ-8.2/NOPB is commonly deployed.
What is the temperature coefficient specification for LM4040CIZ-8.2/NOPB?
The LM4040CIZ-8.2/NOPB has a maximum average temperature coefficient of 100 ppm/°C over the industrial temperature range (−40°C to +85°C). This translates to a worst-case output voltage drift of ±5.3 mV across the full range, calculated as 8.192 V × 100 ppm/°C × 125°C ΔT. The specification is guaranteed for C-grade devices and verified per TI's Statistical Quality Control methodology.
Can LM4040CIZ-8.2/NOPB be used in automotive applications?
Yes, LM4040CIZ-8.2/NOPB is AEC-Q100 Grade 3 qualified (−40°C to +85°C), making it suitable for automotive interior applications such as body control modules, climate control sensors, and infotainment power management. It is not rated for engine bay (Grade 1) or safety-critical (Grade 0) use. The qualification covers stress testing for temperature cycling, humidity, and vibration per AEC standards.
What is the meaning of 'C' in LM4040CIZ-8.2/NOPB?
The 'C' in LM4040CIZ-8.2/NOPB denotes the initial reverse breakdown voltage tolerance grade: ±0.5% at 25°C. This corresponds to a maximum deviation of ±41 mV from the nominal 8.192 V output. The 'I' indicates Industrial temperature grade (−40°C to +85°C), 'Z' specifies TO-92 package, and '/NOPB' confirms lead-free (RoHS-compliant) finish. All these identifiers are defined in TI's official orderable addendum for the LM4040-N family.
LM4040CIZ-8.2/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040CIZ-8.2/NOPB FAQ
1.How can I place an order for LM4040CIZ-8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIZ-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 LM4040CIZ-8.2/NOPB reliable?
The price and inventory of LM4040CIZ-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 LM4040CIZ-8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIZ-8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIZ-8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIZ-8.2/NOPB?
LM4040CIZ-8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIZ-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 LM4040CIZ-8.2/NOPB?
For technical support, including LM4040CIZ-8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIZ-8.2/NOPB requirements.
6.How does Aetrix verify that LM4040CIZ-8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIZ-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 LM4040CIZ-8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIZ-8.2/NOPB?
All LM4040CIZ-8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIZ-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 LM4040CIZ-8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIZ-8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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