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Texas Instruments LM4040DIZ-8.2/NOPB
- Part No.:
- LM4040DIZ-8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040DIZ-8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,327
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Product details
Overview
LM4040DIZ-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 ±20 mV (±0.25%) initial tolerance at 25°C, 91 μA minimum operating current, and 150 ppm/°C max temperature coefficient across −40°C to +125°C. It serves as a stable voltage reference in portable data acquisition and battery-powered instrumentation.
For engineers reviewing the LM4040DIZ-8.2/NOPB datasheet, LM4040DIZ-8.2/NOPB pinout, LM4040DIZ-8.2/NOPB application, or LM4040DIZ-8.2/NOPB equivalent, key selection criteria include industrial/extended temperature operation, low dynamic impedance (≤1.1 Ω), wide 91 μA–15 mA operating current range, no external capacitor requirement, and compatibility with capacitive loads.
Technical Context
The LM4040DIZ-8.2/NOPB uses Zener-zap trimming during wafer sort to achieve tight initial accuracy and incorporates bandgap-derived curvature correction for improved temperature stability. Its two-terminal shunt architecture operates by sinking current through the cathode to maintain a precise reverse breakdown voltage at the anode–cathode junction.
It functions without output capacitance and remains stable under capacitive loading up to 10 nF, enabling direct integration into ADC reference inputs, DAC bias networks, and overvoltage monitor thresholds where low quiescent current and minimal board space are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 8.192 V - precisely matches binary-scaled 213 mV for 13-bit system calibration |
| Initial Tolerance | ±20 mV (±0.25%) at 25°C - enables high-accuracy analog front-end design without post-calibration trimming |
| Temp Coefficient | 150 ppm/°C max - ensures ≤±12.3 mV drift over −40°C to +125°C ambient range |
| Operating Current | 91 μA to 15 mA - supports ultra-low-power sensor nodes and high-current reference buffering |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - minimizes load-induced voltage error in precision feedback loops |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - suitable for 16-bit+ data converters without additional filtering |
| Long-Term Stability | 120 ppm (1000 hrs) - reduces calibration interval requirements in field-deployed equipment |
Pinout & Package
LM4040DIZ-8.2/NOPB uses the 3-pin TO-92 package (LP), with body size 4.30 mm × 4.30 mm. Pin 1 is Anode (grounded), Pin 2 is Cathode (shunt current input/output node), and Pin 3 is NC (must be left floating or connected to Pin 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connected to system ground; establishes voltage reference point for cathode output |
| Cathode (Pin 2) | Shunt current terminal | Sinks variable current to regulate 8.192 V across anode–cathode; serves as precision voltage output node |
| NC (Pin 3) | No-connect terminal | Must remain unconnected or tied to Pin 1; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct use in space-constrained PCB layouts without stability-compensation components |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance-ideal for driving ADC reference inputs and op-amp bias networks |
| Zener-zap trimmed accuracy | Ensures ±20 mV initial tolerance without laser trimming, reducing manufacturing cost and variability |
| Extended temperature range | Specified from −40°C to +125°C-supports automotive under-hood and industrial control applications |
| Low dynamic impedance | ≤1.1 Ω maintains voltage regulation despite rapid load current transients in switching systems |
Applications
| Portable Data Acquisition | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable reference under varying battery voltage and temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing 8.192 V reference to ADC's VREF pin. Use Value: Enables full-scale resolution matching 213 = 8192 steps without gain calibration; 35 μVrms noise avoids digitization dither. |
Use Scenario: Portable gas analyzer using electrochemical sensors with ratiometric signal conditioning. IC Role / Device Role / Timing Role: Precision reference for sensor excitation and ADC conversion in low-power sleep/wake cycles. Use Value: 91 μA min operating current allows operation down to 2.7 V supply; 120 ppm long-term stability extends recalibration intervals to 12 months. |
| Industrial Process Control | Automotive Energy Management |
Use Scenario: 4–20 mA transmitter module operating in harsh factory environments with wide ambient swings. IC Role / Device Role / Timing Role: Reference source for current-loop DAC and fault-detection comparators. Use Value: 150 ppm/°C tempco limits reference drift to <±12 mV over −40°C to +85°C, preserving loop accuracy within 0.1%. |
Use Scenario: EV battery management system monitoring cell voltages in pack-level thermal zones up to +125°C. IC Role / Device Role / Timing Role: Stable reference for high-side voltage monitors and protection ICs in high-temperature zones. Use Value: Extended −40°C to +125°C rating and TO-92 mechanical robustness support under-hood placement without derating. |
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 | Fixed 8.192 V, ±0.5% initial tolerance, 100 ppm/°C max tempco, SOT-23 package | Higher initial tolerance but lower tempco; smaller footprint but lower power dissipation margin | Preferred when board space is constrained and ±0.5% accuracy suffices |
| MAX6029AEUR+T | 8.192 V, ±0.2% initial tolerance, 75 ppm/°C max tempco, SC70-5 package, 35 μVrms noise | Superior tempco and tighter tolerance, but requires 5-pin layout and higher minimum current (100 μA) | Chosen for highest-accuracy industrial DAQ where SC70 routing is feasible |
Compared with TL4050C82IDBZR and MAX6029AEUR+T, LM4040DIZ-8.2/NOPB offers the best balance of TO-92 mechanical reliability, moderate accuracy (±0.25%), and ultra-low 91 μA start-up current-making it optimal for legacy-compatible, high-volume, cost-sensitive instrumentation designs.
Availability
LM4040DIZ-8.2/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial process transmitters, and automotive energy management systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM4040DIZ-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 high-reliability manufacturing.
LM4040DIZ-8.2/NOPB belongs to TI's LM4040-N precision micropower shunt reference family, engineered for space-constrained, battery-operated, and thermally demanding applications where stability, low quiescent current, and robustness are essential.
FAQ
What is the nominal output voltage of the LM4040DIZ-8.2/NOPB?
The LM4040DIZ-8.2/NOPB provides a nominal reverse breakdown voltage of 8.192 V, selected to align with binary-scaled voltage standards for 13-bit digital systems. This value is specified at 100 μA test current and is trimmed during wafer sort to ensure ±20 mV (±0.25%) initial accuracy at 25°C. The LM4040DIZ-8.2/NOPB maintains this voltage across its full 91 μA–15 mA operating current range and −40°C to +125°C temperature span.
Does the LM4040DIZ-8.2/NOPB require an external output capacitor?
No, the LM4040DIZ-8.2/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization components while remaining stable with capacitive loads up to 10 nF. This simplifies layout in compact systems like handheld meters and sensor nodes. The LM4040DIZ-8.2/NOPB achieves this via advanced Zener-zap trimming and dynamic impedance optimization, making it ideal for direct connection to ADC reference inputs without added passive components.
What is the minimum operating current for the LM4040DIZ-8.2/NOPB?
The LM4040DIZ-8.2/NOPB has a minimum operating current of 91 μA at 25°C, increasing slightly over temperature to maintain regulation. This low start-up current enables use in ultra-low-power applications such as battery-backed memory supervisors and wake-on-event sensor interfaces. The LM4040DIZ-8.2/NOPB remains functional across its full 91 μA–15 mA range, supporting both micropower standby modes and higher-current reference buffering without performance degradation.
Is the LM4040DIZ-8.2/NOPB suitable for automotive applications?
Yes-the LM4040DIZ-8.2/NOPB is rated for operation from −40°C to +125°C and is manufactured in TI's qualified automotive-grade process. While not AEC-Q100 certified itself (the Q1 variant is), its extended temperature specification, TO-92 mechanical robustness, and 120 ppm long-term stability make it widely deployed in non-safety-critical automotive subsystems such as cabin climate controllers, battery monitoring modules, and infotainment power management. The LM4040DIZ-8.2/NOPB meets the thermal and reliability demands of under-dash and engine-bay-adjacent placements.
How does the LM4040DIZ-8.2/NOPB compare to the LM4040CIZ-8.2/NOPB?
The LM4040DIZ-8.2/NOPB (D-grade) offers ±20 mV (±0.25%) initial tolerance at 25°C and 150 ppm/°C max temperature coefficient, whereas the C-grade LM4040CIZ-8.2/NOPB provides ±10 mV (±0.12%) tolerance but same 150 ppm/°C tempco. Both share identical TO-92 packaging, 91 μA min current, and 35 μVrms noise. The LM4040DIZ-8.2/NOPB trades tighter initial accuracy for broader availability and lower unit cost-making it preferred for applications where system-level calibration compensates for initial offset, such as programmable logic controller analog I/O modules.
LM4040DIZ-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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 130µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040DIZ-8.2/NOPB FAQ
1.How can I place an order for LM4040DIZ-8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIZ-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 LM4040DIZ-8.2/NOPB reliable?
The price and inventory of LM4040DIZ-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 LM4040DIZ-8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DIZ-8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIZ-8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIZ-8.2/NOPB?
LM4040DIZ-8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIZ-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 LM4040DIZ-8.2/NOPB?
For technical support, including LM4040DIZ-8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIZ-8.2/NOPB requirements.
6.How does Aetrix verify that LM4040DIZ-8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DIZ-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 LM4040DIZ-8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DIZ-8.2/NOPB?
All LM4040DIZ-8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIZ-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 LM4040DIZ-8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4040DIZ-8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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