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Texas Instruments LM4040AIZ-2.0/NOPB
- Part No.:
- LM4040AIZ-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040AIZ-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,960
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Product details
Overview
LM4040AIZ-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a stable 2.048 V reverse breakdown voltage with ±0.1% initial tolerance (A grade) at 25°C, 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to +85°C and requires no output capacitor.
For engineers reviewing the LM4040AIZ-2.0/NOPB datasheet, LM4040AIZ-2.0/NOPB pinout, LM4040AIZ-2.0/NOPB application, or LM4040AIZ-2.0/NOPB equivalent, this device serves as a space-constrained, low-drift reference for battery-powered instrumentation, portable data acquisition, and industrial process controls where tight voltage accuracy and micropower operation are critical.
Technical Context
The LM4040AIZ-2.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.1% initial accuracy and incorporates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (0.3–0.8 Ω) ensures stable regulation across load current changes from 60 μA to 15 mA.
Designed as a two-terminal shunt reference, it functions by sinking excess current through its cathode to maintain precise 2.048 V across external loads. It tolerates capacitive loads without oscillation and exhibits only 0.08% thermal hysteresis after cycling from −40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - sets exact reference point for ADCs, DACs, and comparators. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables high-accuracy calibration without post-manufacture trimming. |
| Temp Coefficient | ≤100 ppm/°C (max) - limits voltage drift to ±6.5 mV over −40°C to +85°C industrial range. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and robust industrial signal chains. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes added noise in precision measurement front-ends. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - maintains regulation stability under fast load transients. |
| Long-Term Stability | 120 ppm (1000 hrs) - ensures reference integrity in deployed systems over time. |
Pinout & Package
LM4040AIZ-2.0/NOPB is housed in a 3-pin TO-92 package (body size 4.30 mm × 4.30 mm), with anode grounded, cathode as active output terminal, and third pin (pin 3) internally unconnected but electrically tied to anode per TI marking guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Must be connected to system ground; defines 0 V reference for cathode voltage. |
| Cathode (Pin 2) | Shunt current sink / output terminal | Sinks current to maintain 2.048 V across load; connects to regulated node and series resistor. |
| NC (Pin 3) | No-connect terminal | Internally floating or bonded to anode; must be left unconnected or tied to pin 1 per TI recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| Zener-zap trimmed accuracy | ±0.1% initial tolerance achieved via wafer-level fuse trimming - eliminates need for board-level calibration. |
| Capacitive load immunity | Stable operation with any capacitive load - simplifies layout and removes need for output capacitor. |
| Micropower operation | 60 μA minimum operating current - extends battery life in portable and remote sensing applications. |
| Low thermal hysteresis | 0.08% voltage shift after −40°C ↔ +125°C thermal cycling - ensures repeatable performance in field-deployed equipment. |
| Wide temperature range | −40°C to +85°C operation (industrial grade) - suitable for harsh environments without derating. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over multi-year deployments. IC Role / Device Role / Timing Role: Shunt reference providing excitation and ADC reference voltage for analog front-end circuitry. Use Value: 60 μA minimum current and 35 μVrms noise enable >5-year battery life while maintaining <0.1% measurement accuracy. |
Use Scenario: 4–20 mA loop-powered transmitters converting RTD or strain-gauge signals in factory automation. IC Role / Device Role / Timing Role: Precision 2.048 V reference for ratiometric DAC and ADC stages in isolated signal conditioning. Use Value: ±0.1% tolerance and 100 ppm/°C tempco ensure <0.25% total error over full industrial temperature range. |
| Medical Point-of-Care Devices | Energy Metering Modules |
Use Scenario: Handheld blood glucose meters and pulse oximeters requiring FDA-grade accuracy and low power. IC Role / Device Role / Timing Role: Stable reference for analog signal chain and microcontroller ADC in compact, sealed enclosures. Use Value: TO-92 package fits constrained PCB space; 0.08% thermal hysteresis prevents calibration drift after sterilization cycles. |
Use Scenario: DIN-rail mounted electricity meters measuring voltage, current, and power with Class 0.5 accuracy. IC Role / Device Role / Timing Role: Primary voltage reference for metrology-grade sigma-delta ADCs and energy calculation ICs. Use Value: 120 ppm long-term stability ensures meter calibration remains valid over 10+ years of continuous operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050A20IDBZR | 2.048 V, ±0.1%, SOT-23-3, 65 μA min current, 50 μVrms noise | Higher noise and slightly higher min current; smaller footprint but lower thermal mass | Preferred when board space is critical and noise budget allows +15 μVrms increase. |
| REF3020AIDBZR | 2.048 V, ±0.2%, SOT-23-3, 50 μA min current, 28 μVrms noise, series topology | Series architecture requires input headroom; lower noise but less flexible biasing | Chosen when ultra-low noise dominates and supply voltage permits ≥2.5 V headroom. |
Compared with TL4050A20IDBZR and REF3020AIDBZR, LM4040AIZ-2.0/NOPB offers the lowest noise among shunt references in TO-92, unique thermal hysteresis performance, and proven reliability in long-life industrial deployments - making it optimal where mechanical robustness and legacy compatibility matter.
Availability
LM4040AIZ-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical point-of-care devices requiring stable component supply and long-lifecycle support.
Supply support for LM4040AIZ-2.0/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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and high-volume manufacturing.
LM4040AIZ-2.0/NOPB belongs to TI's LM4040-N precision micropower shunt reference family, engineered for space-constrained, battery-operated, and industrial measurement systems demanding high initial accuracy and low temperature drift.
FAQ
What is the exact reverse breakdown voltage of LM4040AIZ-2.0/NOPB?
The LM4040AIZ-2.0/NOPB has a nominal reverse breakdown voltage of 2.048 V, specified at 100 μA test current. This value is trimmed during wafer sort to achieve ±0.1% initial tolerance (A grade) at 25°C, and remains stable across its full operating current range (60 μA to 15 mA) and temperature range (−40°C to +85°C).
Can LM4040AIZ-2.0/NOPB operate without an output capacitor?
Yes, LM4040AIZ-2.0/NOPB does not require an output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, eliminating the need for external compensation and simplifying PCB layout - a key advantage over older shunt references that mandate minimum capacitance.
What is the minimum operating current for LM4040AIZ-2.0/NOPB?
The LM4040AIZ-2.0/NOPB requires a minimum operating current of 60 μA at 25°C to maintain regulation within specification. At temperature extremes (−40°C to +85°C), the minimum increases to 65 μA. Below this threshold, the output voltage deviates from 2.048 V and regulation is not guaranteed.
How does LM4040AIZ-2.0/NOPB handle thermal cycling?
LM4040AIZ-2.0/NOPB exhibits only 0.08% thermal hysteresis - the voltage shift measured at 25°C before and after cycling between −40°C and +125°C. This low hysteresis ensures repeatable calibration in field-replaceable modules and equipment subjected to repeated environmental stress.
Is LM4040AIZ-2.0/NOPB RoHS compliant and lead-free?
Yes, LM4040AIZ-2.0/NOPB carries the /NOPB suffix, indicating it is lead-free and RoHS compliant. Texas Instruments certifies this variant as fully compliant with EU Directive 2011/65/EU and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life at ≤30°C/85% RH.
LM4040AIZ-2.0/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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040AIZ-2.0/NOPB FAQ
1.How can I place an order for LM4040AIZ-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIZ-2.0/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 LM4040AIZ-2.0/NOPB reliable?
The price and inventory of LM4040AIZ-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIZ-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040AIZ-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIZ-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIZ-2.0/NOPB?
LM4040AIZ-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIZ-2.0/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 LM4040AIZ-2.0/NOPB?
For technical support, including LM4040AIZ-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIZ-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040AIZ-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040AIZ-2.0/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 LM4040AIZ-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040AIZ-2.0/NOPB?
All LM4040AIZ-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIZ-2.0/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 LM4040AIZ-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040AIZ-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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