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Texas Instruments LM4040BIZ-2.5/NOPB
- Part No.:
- LM4040BIZ-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040BIZ-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:731
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Product details
Overview
LM4040BIZ-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a stable 2.5 V reverse breakdown voltage with ±0.2% initial tolerance (B 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 LM4040BIZ-2.5/NOPB datasheet, LM4040BIZ-2.5/NOPB pinout, LM4040BIZ-2.5/NOPB application, or LM4040BIZ-2.5/NOPB equivalent, this device serves as a space-constrained, low-noise, high-stability reference for analog signal conditioning, data acquisition front-ends, and automotive sensor interfaces where tight voltage accuracy and thermal stability are critical.
Technical Context
The LM4040BIZ-2.5/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.2% initial accuracy and incorporates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (0.3–0.8 Ω) and capacitive-load tolerance enable stable operation without external compensation across varying load currents.
This shunt reference functions as a two-terminal device: cathode supplies regulated voltage while anode is grounded; it maintains regulation by sinking current proportional to input supply excess above 2.5 V. Thermal hysteresis is limited to 0.08%, and long-term stability is 120 ppm after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, fixed and non-adjustable - sets precise bias or reference level in analog circuits. |
| Initial Tolerance | ±0.2% at 25°C (B grade) - enables high-accuracy ADC/DAC calibration without post-fabrication trimming. |
| Temp Coefficient | ≤100 ppm/°C (max) over −40°C to +85°C - ensures voltage drift ≤±19 mV across full industrial range. |
| Noise (10 Hz–10 kHz) | 35 μVrms typical - minimizes contribution to system noise floor in precision measurement paths. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and robust industrial signal chains alike. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - provides excellent load regulation and rejection of supply ripple. |
| Thermal Hysteresis | 0.08% - guarantees repeatable voltage after thermal cycling between −40°C and +125°C. |
Pinout & Package
LM4040BIZ-2.5/NOPB is housed in a 3-pin TO-92 package (body size 4.30 mm × 4.30 mm), with leads arranged bottom-view. Anode (pin 3) is grounded; Cathode (pin 2) delivers the 2.5 V reference; pin 1 is unconnected (NC) and must float or be tied to anode per EMI-sensitive layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference terminal | Common return path; must be connected to system ground for proper shunt regulation. |
| Cathode (Pin 2) | Output / shunt current terminal | Provides 2.5 V reference voltage; sinks all excess current from series resistor to maintain regulation. |
| NC (Pin 1) | No-connect terminal | Must remain floating or be tied to anode (pin 3); improves EMI immunity in noisy environments when connected. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct integration into space-constrained PCBs without stability-compensation components. |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or filtering networks without oscillation risk. |
| Zener-zap voltage trim | Ensures ±0.2% initial accuracy at wafer level, eliminating need for board-level calibration. |
| Low quiescent current | 60 μA minimum operating current allows use in battery-powered field transmitters and IoT sensors. |
| AEC-Q100 Grade 3 qualified | Validated for automotive applications including engine control modules and body electronics. |
Applications
| Field Transmitters | Data Acquisition |
|---|---|
|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter in oil & gas infrastructure. IC Role / Device Role / Timing Role: Shunt voltage reference for DAC output scaling and sensor excitation. Use Value: ±0.2% initial tolerance and 100 ppm/°C TC ensure <±0.1% total error over −40°C to +85°C ambient. |
Use Scenario: Industrial PLC analog input module measuring ±10 V sensor signals. IC Role / Device Role / Timing Role: Precision reference for 16-bit SAR ADC front-end and PGA gain-setting. Use Value: 35 μVrms low-frequency noise prevents degradation of effective resolution below 16 bits. |
| Automotive Sensor Interface | Analog Input Module |
|
Use Scenario: Cabin air quality sensor with NDIR CO₂ detection requiring stable bias voltage. IC Role / Device Role / Timing Role: Reference for op-amp signal conditioning and ADC reference rail. Use Value: AEC-Q100 Grade 3 qualification and 0.08% thermal hysteresis guarantee repeatability after thermal cycling. |
Use Scenario: Modular I/O system with hot-swappable analog input cards for factory automation. IC Role / Device Role / Timing Role: Local reference source per channel to avoid backplane voltage drop errors. Use Value: TO-92 package allows through-hole mounting on dense card-edge connectors with minimal footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIZ-2.5/NOPB | ±0.5% initial tolerance (C grade), same TO-92 package and 2.5 V output | Lower accuracy acceptable in cost-sensitive industrial controls where ±0.5% system error budget exists | Select when tighter tolerance is unnecessary and BOM cost reduction is prioritized over calibration margin. |
| REF3025AIDBZR | 2.5 V series reference in SOT-23; 50 ppm/°C TC, 25 μVrms noise, 50 μA quiescent current | Requires input voltage ≥2.7 V; not a drop-in replacement due to 3-terminal architecture and different topology | Choose for ultra-low-noise, low-TC applications where supply headroom permits series topology and layout allows SOT-23 placement. |
Compared with LM4040CIZ-2.5/NOPB, the LM4040BIZ-2.5/NOPB offers 2.5× tighter initial tolerance for higher system accuracy; versus REF3025AIDBZR, it eliminates input headroom requirement and simplifies biasing but trades off slightly higher noise and temperature coefficient.
Availability
LM4040BIZ-2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, automotive sensor interfaces, and industrial data acquisition systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040BIZ-2.5/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 automotive-grade qualification.
The LM4040-N series was engineered for space-constrained, high-reliability applications demanding micropower operation, low noise, and robust thermal performance - particularly in industrial sensing and automotive subsystems.
FAQ
What is the maximum operating current for LM4040BIZ-2.5/NOPB?
The LM4040BIZ-2.5/NOPB supports a maximum operating current of 15 mA across its rated temperature range. This limit ensures safe power dissipation within the TO-92 package's 550 mW rating at 25°C ambient, with appropriate derating above that temperature per its 170°C/W thermal resistance.
Does LM4040BIZ-2.5/NOPB require an external capacitor for stability?
No, the LM4040BIZ-2.5/NOPB does not require an external output capacitor. Its internal design achieves inherent stability across all capacitive loads, enabling direct connection to ADC input capacitors or filtering networks without risk of oscillation - a key advantage in compact analog front-ends.
What is the temperature range specification for LM4040BIZ-2.5/NOPB?
The LM4040BIZ-2.5/NOPB is specified for the industrial temperature range of −40°C to +85°C (Grade I). It is also AEC-Q100 Grade 3 qualified, meaning it meets automotive reliability requirements for this same temperature span.
How does the LM4040BIZ-2.5/NOPB achieve its ±0.2% initial voltage tolerance?
The LM4040BIZ-2.5/NOPB achieves ±0.2% initial tolerance via laser Zener-zap trimming during wafer sort. This precision adjustment targets the 2.5 V reverse breakdown voltage before packaging, ensuring compliance without post-assembly calibration - a process confirmed in TI's SNOS633N datasheet section 5.8.
Can LM4040BIZ-2.5/NOPB be used in place of LM4040AIM3-2.5/NOPB?
Yes, LM4040BIZ-2.5/NOPB can replace LM4040AIM3-2.5/NOPB in applications tolerant of ±0.2% vs. ±0.1% initial tolerance. Both share identical electrical specs except tolerance grade and package (TO-92 vs. SOT-23); mechanical redesign is required due to differing footprints and thermal characteristics.
LM4040BIZ-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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
LM4040BIZ-2.5/NOPB FAQ
1.How can I place an order for LM4040BIZ-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIZ-2.5/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 LM4040BIZ-2.5/NOPB reliable?
The price and inventory of LM4040BIZ-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIZ-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040BIZ-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIZ-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIZ-2.5/NOPB?
LM4040BIZ-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIZ-2.5/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 LM4040BIZ-2.5/NOPB?
For technical support, including LM4040BIZ-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIZ-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040BIZ-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040BIZ-2.5/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 LM4040BIZ-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040BIZ-2.5/NOPB?
All LM4040BIZ-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIZ-2.5/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 LM4040BIZ-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040BIZ-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040BIZ-2.5/NOPB Tags
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