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Texas Instruments LM4040DIZ-3.0/NOPB
- Part No.:
- LM4040DIZ-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040DIZ-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,264
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Product details
Overview
LM4040DIZ-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a stable 3.0 V reverse breakdown voltage with ±20 mV (±0.67%) initial tolerance at 25°C, 62 μA minimum operating current, and 100 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040DIZ-3.0/NOPB datasheet, LM4040DIZ-3.0/NOPB pinout, LM4040DIZ-3.0/NOPB application, or LM4040DIZ-3.0/NOPB equivalent, this page provides verified pin functions, real-world load regulation behavior, thermal hysteresis data (0.08%), and validated alternatives for industrial-grade voltage reference selection.
Technical Context
The LM4040DIZ-3.0/NOPB operates as a two-terminal shunt reference, sinking current through its cathode to maintain precise 3.0 V across external loads. Its Zener-zap trimmed bandgap architecture enables curvature-corrected temperature stability and low dynamic impedance (≤1.1 Ω) over 62 μA–15 mA operating range.
No external capacitor is required for stability, and it tolerates capacitive loads up to 10 nF without oscillation. The device supports industrial temperature operation (−40°C to +85°C) and exhibits 35 μVRMS wideband noise (10 Hz–10 kHz) and 120 ppm long-term drift after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance | ±20 mV (±0.67%) at 25°C - defines worst-case DC accuracy before temperature or load effects |
| Temp Coefficient | Max 100 ppm/°C - limits voltage drift to ±6.5 mV over −40°C to +85°C range |
| Min Operating Current | 62 μA - minimum cathode current needed to enter regulation; below this, output collapses |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - ensures <1.1 mV output shift per 1 mA load change within regulation range |
| Wideband Noise | 35 μVRMS (10 Hz–10 kHz) - critical for high-resolution data acquisition systems |
| Thermal Hysteresis | 0.08% - ≤2.4 mV hysteresis error after cycling between −40°C and +125°C |
Pinout & Package
LM4040DIZ-3.0/NOPB uses the 3-pin TO-92 package (body size 4.30 mm × 4.30 mm), with leads arranged bottom-view: Pin 1 = Anode (ground reference), Pin 2 = Cathode (shunt current/output node), Pin 3 = NC (no-connect, must float or tie to Pin 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Internally connected to substrate; must be tied to system ground for proper regulation |
| Cathode (Pin 2) | Shunt current sink / output terminal | Voltage appears between Cathode and Anode; sinks all excess current to hold 3.0 V |
| NC (Pin 3) | No-connect terminal | Must remain unconnected or shorted to Anode (Pin 1); no internal function |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct connection to high-impedance loads without stability risk - reduces BOM count and board space |
| Tolerates capacitive loads | Stable with up to 10 nF at cathode - supports filtering in noisy environments without phase margin loss |
| Micropower operation | 62 μA minimum current enables use in battery-powered devices with multi-year runtime |
| Low thermal hysteresis | 0.08% error after thermal cycling - preserves calibration integrity in field-deployed instruments |
| Zener-zap trimmed accuracy | Factory-trimmed via wafer-level fuse/Zener-zap process - eliminates post-assembly calibration |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors measuring temperature, humidity, and pressure over months without maintenance. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0 V excitation for bridge sensors and reference for 16-bit SAR ADCs. Use Value: 62 μA min current and 35 μVRMS noise enable >100 dB SNR and multi-year battery life without compromising measurement resolution. |
Use Scenario: 4–20 mA loop-powered transmitters in factory automation, converting analog sensor outputs to current signals. IC Role / Device Role / Timing Role: Precision 3.0 V reference for DAC-based current loop control and sensor signal conditioning. Use Value: 100 ppm/°C tempco and 0.08% thermal hysteresis ensure <±0.1% full-scale error across ambient temperature swings. |
| Energy Metering Front-Ends | Medical Diagnostic Equipment |
Use Scenario: Residential smart meters requiring metrology-grade voltage references for accurate kWh calculation. IC Role / Device Role / Timing Role: Reference for anti-aliasing filters and sigma-delta ADCs sampling AC mains voltage/current waveforms. Use Value: Low dynamic impedance (≤1.1 Ω) maintains regulation under fast transient loading from switched-capacitor sampling circuits. |
Use Scenario: Portable ECG and pulse oximetry units where signal fidelity directly impacts clinical diagnosis. IC Role / Device Role / Timing Role: Bias reference for low-noise instrumentation amplifiers and ADC reference in analog front-end. Use Value: 35 μVRMS noise floor prevents degradation of microvolt-level bio-signals during digitization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACLP | Adjustable 2.495 V reference; requires two external resistors; higher 2 mA min cathode current | Used where programmable output or tighter initial tolerance (±0.5%) is needed; unsuitable for ultra-low-power designs | Select TL431ACLP only when adjustable output or higher drive capability justifies 32× higher minimum current |
| REF3030AIDBZR | 3.0 V series reference in SOT-23; 50 μA quiescent current; requires output capacitor; 50 ppm/°C tempco | Preferred in noise-sensitive, low-dropout applications where load isolation matters more than micropower | Choose REF3030AIDBZR when supply headroom allows series topology and lower tempco outweighs added capacitor and layout complexity |
Compared with TL431ACLP and REF3030AIDBZR, LM4040DIZ-3.0/NOPB uniquely combines TO-92 compatibility, 62 μA min current, and no-output-capacitor operation - making it optimal for cost-constrained, space-limited, battery-operated shunt reference roles where fixed 3.0 V is acceptable.
Availability
LM4040DIZ-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and energy metering front-ends requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4040DIZ-3.0/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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of precision reference design heritage.
The LM4040-N family was engineered for space-constrained, low-power applications demanding high initial accuracy and robust thermal stability - targeting portable test equipment, sensor interfaces, and industrial control systems.
FAQ
What is the maximum operating current for LM4040DIZ-3.0/NOPB?
The LM4040DIZ-3.0/NOPB supports a maximum operating current of 15 mA. Exceeding this value risks exceeding absolute maximum power dissipation (550 mW for TO-92), potentially causing thermal runaway or permanent damage. Derating is required above 25°C ambient per RθJA = 170°C/W.
Does LM4040DIZ-3.0/NOPB require an external capacitor for stability?
No, LM4040DIZ-3.0/NOPB does not require an external capacitor for stability. Its internal design ensures unconditional stability with purely resistive or capacitive loads up to 10 nF, eliminating the need for output bypassing and simplifying layout in compact systems.
What is the thermal hysteresis specification for LM4040DIZ-3.0/NOPB?
The LM4040DIZ-3.0/NOPB has a thermal hysteresis of 0.08%, equivalent to ±2.4 mV at 3.0 V. This represents the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C - critical for recalibration-free operation in field-deployed instruments.
Can LM4040DIZ-3.0/NOPB be used in automotive applications?
The LM4040DIZ-3.0/NOPB is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, TI offers the LM4040-N-Q1 variant in SOT-23; LM4040DIZ-3.0/NOPB should only be used in non-safety-critical automotive subsystems with confirmed thermal derating.
How does the 3.0 V output of LM4040DIZ-3.0/NOPB compare to the 2.5 V and 4.096 V variants?
The LM4040DIZ-3.0/NOPB shares identical architecture and performance envelope with other LM4040-N variants but targets applications needing exactly 3.0 V - such as 3.3 V rail-scaled ADC references or 3 V logic-compatible sensor excitation. Its 62 μA min current is higher than the 2.5 V version (60 μA) but lower than the 4.096 V version (68 μA), reflecting Zener voltage scaling.
LM4040DIZ-3.0/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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040DIZ-3.0/NOPB FAQ
1.How can I place an order for LM4040DIZ-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIZ-3.0/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-3.0/NOPB reliable?
The price and inventory of LM4040DIZ-3.0/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-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DIZ-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIZ-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIZ-3.0/NOPB?
LM4040DIZ-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIZ-3.0/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-3.0/NOPB?
For technical support, including LM4040DIZ-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIZ-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040DIZ-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DIZ-3.0/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-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DIZ-3.0/NOPB?
All LM4040DIZ-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIZ-3.0/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-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DIZ-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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