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Texas Instruments LM4040AIZ-5.0/NOPB
- Part No.:
- LM4040AIZ-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040AIZ-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,466
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Product details
Overview
LM4040AIZ-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a stable 5.0 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 74 μA to 15 mA over −40°C to +85°C and requires no output capacitor.
For engineers reviewing the LM4040AIZ-5.0/NOPB datasheet, LM4040AIZ-5.0/NOPB pinout, LM4040AIZ-5.0/NOPB application, or LM4040AIZ-5.0/NOPB equivalent, key selection factors include shunt reference stability under capacitive loads, low-current operation down to 74 μA, AEC-Q100 Grade 3 qualification, and TO-92 mechanical compatibility for legacy analog signal conditioning designs.
Technical Context
The LM4040AIZ-5.0/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 minimal voltage shift across 74 μA–15 mA operating current range.
Designed as a two-terminal shunt device, it functions by sinking excess current to maintain precise cathode-to-anode voltage. The TO-92 package supports through-hole mounting and provides thermal resistance of 170°C/W (0.125″ lead length), enabling reliable operation in industrial field transmitters and data acquisition front-ends without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and unadjustable - sets absolute reference level for ADCs, DACs, and comparators. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables high-accuracy calibration without post-manufacture trimming in production test. |
| Temp Coefficient | ≤100 ppm/°C (max) over −40°C to +85°C - limits voltage drift to ±4.25 mV across full industrial range. |
| Operating Current | 74 μA min / 15 mA max - supports ultra-low-power sensor nodes and robust high-current biasing in noisy industrial environments. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes added uncertainty in 16-bit+ data acquisition systems. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - maintains regulation stability despite rapid load current transients. |
| Thermal Hysteresis | 0.08% - ensures repeatable voltage after thermal cycling between −40°C and +125°C. |
Pinout & Package
LM4040AIZ-5.0/NOPB is supplied in TO-92 package (LP variant), with 3 leads and nominal body size 4.30 mm × 4.30 mm. Pin 1 is Cathode, Pin 2 is Anode, Pin 3 is NC (no connect, must float or tie to anode per TI recommendation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output voltage node | Voltage is measured between this pin and Anode; sinks all excess current to regulate 5.0 V at this node. |
| Anode (Pin 2) | Reference ground return | Typically connected to system ground; forms the reference potential against which cathode voltage is defined. |
| NC (Pin 3) | No-connect terminal | Must remain floating or be tied to Anode; improves EMI immunity in high-noise environments when connected. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct integration into space-constrained PCB layouts without stability-compensation components. |
| Tolerates capacitive loads | Stable operation with up to 10 nF directly at cathode - simplifies filtering in ADC reference paths. |
| AEC-Q100 Grade 3 qualified | Validated for automotive applications from −40°C to +85°C - supports infotainment and body control modules. |
| Zener-zap voltage trim | Ensures ±0.1% initial accuracy without laser trimming - reduces manufacturing cost while maintaining precision. |
| Low quiescent current | 74 μA minimum operating current - extends battery life in portable instrumentation and wireless sensors. |
Applications
| Field Transmitters | Data Acquisition |
|---|---|
Use Scenario: 4–20 mA loop-powered sensor transmitter in oil & gas wellhead monitoring. IC Role / Device Role / Timing Role: Shunt reference for DAC output scaling and current-loop compliance voltage setting. Use Value: ±0.1% initial tolerance and 100 ppm/°C TC ensure <0.2% total error across ambient temperature swings without recalibration. |
Use Scenario: Isolated 16-bit analog input module for PLC backplane. IC Role / Device Role / Timing Role: Precision reference for SAR ADC and anti-aliasing filter biasing. Use Value: 35 μVrms noise and 0.8 Ω dynamic impedance preserve ENOB >15.5 bits in 100 kSPS sampling. |
| Analog Input Module | Automotive Body Control |
Use Scenario: Modular I/O card with multiple voltage/current input channels. IC Role / Device Role / Timing Role: Shared reference source for multiplexed channel calibration and offset nulling. Use Value: Stable 5.0 V output across 74 μA–15 mA load range allows single reference to serve multiple signal chains simultaneously. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting. IC Role / Device Role / Timing Role: Voltage reference for microcontroller ADC measuring switch states and sensor feedback. Use Value: AEC-Q100 Grade 3 qualification and −40°C to +85°C operation guarantee reliability in under-dash thermal environments. |
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-5.0/NOPB | ±0.5% initial tolerance (C grade), same 5.0 V nominal, identical TO-92 package and pinout | Lower accuracy acceptable in non-critical biasing or coarse calibration circuits | Select when ±0.5% tolerance meets system error budget and cost reduction is prioritized. |
| TL431ACLP | Adjustable 2.495 V reference, higher 1 mA min cathode current, SO-8 package | Requires external resistor network for 5 V setup; unsuitable for ultra-low-power or TO-92 footprint-constrained designs | Choose only if adjustable output or higher current drive (>1 mA) is required and board layout permits SO-8 placement. |
Compared with LM4040CIZ-5.0/NOPB and TL431ACLP, the LM4040AIZ-5.0/NOPB uniquely delivers A-grade precision in TO-92 with sub-100 μA start-up, making it optimal for high-accuracy, low-power, through-hole analog signal chains where pin compatibility and minimal BOM count are critical.
Availability
LM4040AIZ-5.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, data acquisition systems, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040AIZ-5.0/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 automotive-qualified components.
The LM4040-N series was developed to deliver high-accuracy, micropower shunt references for space-constrained industrial and automotive signal conditioning - emphasizing stability, low noise, and qualification rigor over broad feature integration.
FAQ
What is the minimum operating current for LM4040AIZ-5.0/NOPB?
The LM4040AIZ-5.0/NOPB requires a minimum operating current of 74 μA at 25°C to maintain regulation within specification. This value increases slightly at temperature extremes, reaching 65 μA at −40°C to +85°C per recommended operating conditions. Below this threshold, the device may not sustain its rated 5.0 V output accuracy or stability.
Is LM4040AIZ-5.0/NOPB qualified for automotive use?
Yes, LM4040AIZ-5.0/NOPB is AEC-Q100 Grade 3 qualified (−40°C to +85°C), meeting automotive reliability standards for body electronics and infotainment systems. It is not Grade 1 (−40°C to +125°C); for extended temperature automotive applications, LM4040AIM3X-5.0/NOPB in SOT-23 is the Grade 1 option.
Does LM4040AIZ-5.0/NOPB require an output capacitor?
No, LM4040AIZ-5.0/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability even with capacitive loads up to 10 nF at the cathode, simplifying layout and reducing bill-of-materials count in precision analog circuits.
What is the thermal hysteresis specification for LM4040AIZ-5.0/NOPB?
The LM4040AIZ-5.0/NOPB exhibits 0.08% thermal hysteresis - defined as the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C. This low hysteresis ensures repeatable reference performance across repeated thermal excursions in industrial and automotive environments.
Can LM4040AIZ-5.0/NOPB be used in place of LM4040CIZ-5.0/NOPB?
Yes, LM4040AIZ-5.0/NOPB is a direct drop-in replacement for LM4040CIZ-5.0/NOPB in TO-92 footprint, offering tighter ±0.1% initial tolerance versus ±0.5%. No PCB changes are required, but system-level accuracy validation is recommended due to improved performance margins in gain/offset calibration paths.
LM4040AIZ-5.0/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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040AIZ-5.0/NOPB FAQ
1.How can I place an order for LM4040AIZ-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIZ-5.0/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-5.0/NOPB reliable?
The price and inventory of LM4040AIZ-5.0/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-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040AIZ-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIZ-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIZ-5.0/NOPB?
LM4040AIZ-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIZ-5.0/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-5.0/NOPB?
For technical support, including LM4040AIZ-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIZ-5.0/NOPB requirements.
6.How does Aetrix verify that LM4040AIZ-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040AIZ-5.0/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-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040AIZ-5.0/NOPB?
All LM4040AIZ-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIZ-5.0/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-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040AIZ-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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