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Texas Instruments LM4040AIZ-4.1/NOPB
- Part No.:
- LM4040AIZ-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040AIZ-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,620
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Product details
Overview
LM4040AIZ-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a fixed 4.096 V reverse breakdown voltage with ±0.1% initial tolerance (Grade A) at 25°C, 100 ppm/°C max temperature coefficient, and 68 μA minimum operating current - used for high-accuracy analog-to-digital conversion and sensor excitation in industrial field transmitters.
For engineers reviewing the LM4040AIZ-4.1/NOPB datasheet, LM4040AIZ-4.1/NOPB pinout, LM4040AIZ-4.1/NOPB application, or LM4040AIZ-4.1/NOPB equivalent, this page provides verified specifications, TO-92 terminal mapping, automotive-grade temperature range support (−40°C to +125°C), noise performance (35 μVrms, 10 Hz–10 kHz), and direct alternative part comparisons for stable reference design.
Technical Context
The LM4040AIZ-4.1/NOPB operates as a two-terminal shunt reference, sinking current through its cathode to maintain a precise 4.096 V across external load and series resistor. Its Zener-zap trimmed bandgap architecture enables ±0.1% initial accuracy and curvature-corrected temperature drift compensation.
It requires no output capacitor, tolerates capacitive loads up to 10 nF, and maintains stability over 68 μA–15 mA operating current. Designed for space-constrained applications, it supports industrial (−40°C to +85°C) and extended automotive-grade (−40°C to +125°C) operation per AEC-Q100 Grade 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - sets exact reference point for ADCs, DACs, and sensor bridges. |
| Initial Tolerance | ±0.1% at 25°C (Grade A) - enables 12-bit system accuracy without trimming. |
| Temp Coefficient | ≤100 ppm/°C (max) - ensures ≤±0.41 mV drift over −40°C to +125°C full range. |
| Min Operating Current | 68 μA - allows ultra-low-power operation in battery-powered field instruments. |
| Max Operating Current | 15 mA - supports robust load regulation under varying sink conditions. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes quantization error in precision data acquisition. |
| Dynamic Impedance | 0.3–0.8 Ω - ensures tight load regulation and fast transient response. |
Pinout & Package
LM4040AIZ-4.1/NOPB uses the 3-pin TO-92 package (body size 4.30 mm × 4.30 mm), with leads designated Anode (pin 3), Cathode (pin 2), and NC (pin 1). Pin 1 must be left floating or connected to pin 3 (Anode) in EMI-sensitive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 2) | I/O | Shunt current input and reference voltage output node - connects to series resistor and load. |
| Anode (Pin 3) | O | Ground return path - must be tied to system ground for proper biasing. |
| NC (Pin 1) | - | No-connect terminal - floats by default; tie to Anode only if EMI mitigation is required. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables single-component reference design with guaranteed stability across all capacitive loads. |
| Zener-zap voltage trim | Ensures ±0.1% initial accuracy at wafer sort - eliminates post-assembly calibration. |
| Bandgap temperature curvature correction | Reduces parabolic drift to ≤100 ppm/°C - improves accuracy over wide ambient ranges. |
| Low dynamic impedance (0.3–0.8 Ω) | Maintains <±1 mV load regulation from 68 μA to 15 mA - critical for variable-sink applications. |
| AEC-Q100 Grade 1 qualified | Validated for automotive use from −40°C to +125°C - supports engine control and ADAS sensor modules. |
Applications
| Field Transmitter Calibration | Data Acquisition Reference |
|---|---|
|
Use Scenario: 4–20 mA loop-powered pressure transmitter with integrated ADC and microcontroller. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation for bridge sensor and reference for 12-bit SAR ADC. Use Value: Enables ±0.1% full-scale accuracy over −40°C to +85°C without calibration, meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: Industrial PLC analog input module measuring thermocouple and RTD signals. IC Role / Device Role / Timing Role: Precision reference for dual-slope or sigma-delta ADC front-end with programmable gain amplifier. Use Value: 35 μVrms noise and 100 ppm/°C TC ensure ≤0.01% measurement drift across 0–70°C operating range. |
| Automotive Sensor Interface | Energy Infrastructure Monitoring |
|
Use Scenario: Battery management system cell voltage monitor in EV traction battery pack. IC Role / Device Role / Timing Role: Shunt reference for isolated ADC measuring 2.5–4.3 V cell voltages with galvanic separation. Use Value: AEC-Q100 Grade 1 qualification and −40°C to +125°C operation guarantee reliability in under-hood environments. |
Use Scenario: Smart meter voltage and current sensing with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Stable 4.096 V reference for metrology-grade ADC sampling AC line voltage at 2 kHz. Use Value: 68 μA min current and no capacitor requirement reduce BOM count and PCB area in sealed meter housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C41IDBZR | 4.096 V, ±0.5% initial tolerance (Grade C), 75 ppm/°C max TC, SOT-23 package. | Lacks AEC-Q100 qualification; rated only for −40°C to +85°C industrial grade. | Select when cost sensitivity outweighs automotive qualification and tighter tolerance. |
| REF3040AIDBZR | 4.096 V, ±0.2% initial tolerance, 50 ppm/°C max TC, but series topology (3-pin, higher quiescent current). | Requires external bypass capacitor; not a drop-in replacement due to different topology and pinout. | Choose for lower TC where board space allows series reference layout and higher supply headroom exists. |
Compared with TL4050C41IDBZR and REF3040AIDBZR, LM4040AIZ-4.1/NOPB uniquely combines AEC-Q100 Grade 1 qualification, ±0.1% tolerance, TO-92 through-hole compatibility, and zero-capacitor operation - making it optimal for calibrated field instruments and automotive sensor nodes where traceability and long-term stability are mandatory.
Availability
LM4040AIZ-4.1/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and automotive sensor interfaces requiring stable component supply, long-lifecycle availability, and AEC-Q100-compliant sourcing.
Supply support for LM4040AIZ-4.1/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 component validation.
The LM4040-N product line delivers micropower shunt references optimized for high-accuracy, low-drift applications in industrial automation, automotive sensing, and portable instrumentation - emphasizing factory-trimmed accuracy and robust thermal performance.
FAQ
What is the operating temperature range for LM4040AIZ-4.1/NOPB?
The LM4040AIZ-4.1/NOPB is qualified per AEC-Q100 Grade 1 and supports continuous operation from −40°C to +125°C. It also meets industrial Grade 3 specifications (−40°C to +85°C). The device's 100 ppm/°C max temperature coefficient ensures predictable voltage drift across this full range, validated in production testing per TI's SNOS633N datasheet Section 5.14.
Does LM4040AIZ-4.1/NOPB require an output capacitor?
No, LM4040AIZ-4.1/NOPB does not require an output capacitor. Its internal design guarantees stability with any capacitive load up to 10 nF, eliminating the need for external stabilization components. This simplifies layout and reduces bill-of-materials count - a key advantage confirmed in the "No output capacitor required" feature list and Section 3 Description of the official datasheet.
What is the minimum cathode current needed for LM4040AIZ-4.1/NOPB to regulate properly?
The LM4040AIZ-4.1/NOPB requires a minimum cathode current of 68 μA at 25°C to maintain regulation, as specified in Section 5.3 Recommended Operating Conditions. At full temperature range (−40°C to +125°C), the minimum increases to 73 μA. Below this threshold, the device exits regulation and output voltage drops below 4.096 V.
How does LM4040AIZ-4.1/NOPB achieve ±0.1% initial accuracy?
LM4040AIZ-4.1/NOPB achieves ±0.1% initial accuracy via fuse and Zener-zap trimming during wafer sort, as documented in Section 3 Description. This factory calibration ensures that prime parts meet Grade A tolerance at 25°C without requiring system-level trimming - a capability directly verified in Electrical Characteristics Table 5.14 for the 4.1 V variant.
Is LM4040AIZ-4.1/NOPB pin-compatible with other LM4040 variants in TO-92?
Yes, LM4040AIZ-4.1/NOPB shares identical TO-92 pinout (Anode = pin 3, Cathode = pin 2, NC = pin 1) and mechanical footprint with all other LM4040-N TO-92 variants (e.g., LM4040AIZ-2.5/NOPB, LM4040AIZ-5.0/NOPB). This allows direct substitution within the same voltage grade and tolerance class without PCB changes.
LM4040AIZ-4.1/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):
- 4.096V
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040AIZ-4.1/NOPB FAQ
1.How can I place an order for LM4040AIZ-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIZ-4.1/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-4.1/NOPB reliable?
The price and inventory of LM4040AIZ-4.1/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-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040AIZ-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIZ-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIZ-4.1/NOPB?
LM4040AIZ-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIZ-4.1/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-4.1/NOPB?
For technical support, including LM4040AIZ-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIZ-4.1/NOPB requirements.
6.How does Aetrix verify that LM4040AIZ-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040AIZ-4.1/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-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040AIZ-4.1/NOPB?
All LM4040AIZ-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIZ-4.1/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-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4040AIZ-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIZ-4.1/NOPB Tags
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