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Texas Instruments LM4040DIZ-5.0/LFT1
- Part No.:
- LM4040DIZ-5.0/LFT1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040DIZ-5.0/LFT1.pdf
- Description:
- IC VREF SHUNT 1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,670
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Product details
Overview
LM4040DIZ-5.0/LFT1 from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a fixed 5.0 V reverse breakdown voltage with ±1.0% initial tolerance (Grade D), 100 ppm/°C max temperature coefficient, and stable operation from 74 μA to 15 mA over −40°C to +85°C. It serves as a compact, capacitor-free reference in analog signal chains for data acquisition and industrial sensor interfaces.
For engineers reviewing the LM4040DIZ-5.0/LFT1 datasheet, LM4040DIZ-5.0/LFT1 pinout, LM4040DIZ-5.0/LFT1 application, or LM4040DIZ-5.0/LFT1 equivalent, key selection criteria include its TO-92 mechanical compatibility, no-output-capacitor requirement, low 35 μVrms noise (10 Hz–10 kHz), and verified performance across industrial temperature range without external compensation.
Technical Context
The LM4040DIZ-5.0/LFT1 implements a trimmed Zener-based shunt architecture with fuse-and-Zener-zap voltage calibration at wafer sort, achieving Grade D (±1.0%) accuracy at 25°C. Its bandgap-derived temperature drift curvature correction enables stable 5.0 V output across −40°C to +85°C.
Designed for direct replacement of legacy references, it tolerates capacitive loads and requires no output capacitor-unlike series references-while maintaining dynamic impedance below 1.1 Ω at 1 mA and wide operating current range (74 μA–15 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed |
| Initial Tolerance | ±25 mV (±1.0%) at 25°C - defines baseline accuracy before thermal drift |
| Temp Coefficient | ≤100 ppm/°C - ensures ≤±5.2 mV total drift over −40°C to +85°C |
| Operating Current | 74 μA min to 15 mA max - supports ultra-low-power and high-current biasing |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - critical for high-resolution ADC reference stability |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - minimizes load-induced voltage variation |
| Thermal Hysteresis | 0.08% - limits voltage shift after thermal cycling between −40°C and +125°C |
Pinout & Package
LM4040DIZ-5.0/LFT1 uses the 3-pin TO-92 package (body size 4.30 mm × 4.30 mm), with leads arranged bottom-view: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no connect, must float or tie to anode per TI recommendation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current path and output voltage node; connects to regulated rail via series resistor |
| Anode (Pin 2) | O | Reference ground node; must be connected to system ground or low-impedance return |
| NC (Pin 3) | - | No internal connection; leave floating or tie to Anode (Pin 2) for EMI mitigation |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts and eliminates capacitor aging/reliability concerns |
| Tolerates capacitive loads | Stable under >100 nF load capacitance - simplifies filtering without oscillation risk |
| Micropower operation | 74 μA minimum operating current allows use in battery-powered field transmitters |
| Zener-zap voltage trim | Ensures ±1.0% initial accuracy without post-package trimming or calibration |
| Industrial temp range | Guaranteed 5.0 V operation from −40°C to +85°C - suitable for uncontrolled environments |
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 voltage reference for DAC output scaling and current loop regulation. Use Value: Stable 5.0 V reference enables ±0.1% full-scale accuracy despite ambient swings from −40°C to +70°C. | Use Scenario: Isolated 16-bit analog input module in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Precision reference for SAR ADC front-end, decoupled from noisy digital supply rails. Use Value: 35 μVrms noise and <1.1 Ω dynamic impedance preserve ENOB in 100 kSPS sampling. |
| Analog Input Module | Energy Infrastructure |
Use Scenario: DIN-rail mounted power quality analyzer measuring grid harmonics and RMS voltage. IC Role / Device Role / Timing Role: Reference source for dual-slope or sigma-delta ADCs digitizing AC line signals. Use Value: 100 ppm/°C TC and 0.08% thermal hysteresis prevent calibration drift during daily thermal cycling. | Use Scenario: Smart meter metrology unit performing Class 0.5 active energy measurement per IEC 62053-21. IC Role / Device Role / Timing Role: Primary voltage reference for metrology ADC and anti-aliasing filter biasing. Use Value: ±1.0% initial tolerance and long-term stability (120 ppm @ 1000 hrs) support 10-year calibration intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | Fixed 5.0 V, ±0.5% initial tolerance (Grade C), SOT-23-3 package, 75 μA min current | Higher accuracy but smaller SOT-23 footprint; lacks TO-92 mechanical compatibility | Select when board space is constrained and tighter initial tolerance is required |
| REF3050AIDBZR | 5.0 V series reference, ±0.2% initial tolerance, 50 μA quiescent current, SOT-23-3 | Series topology requires output capacitor; higher cost and different biasing scheme | Select only if load isolation or zero quiescent current in shutdown is mandatory |
Compared with TL4050C50IDBZR and REF3050AIDBZR, the LM4040DIZ-5.0/LFT1 offers TO-92 through-hole compatibility, no-output-capacitor operation, and proven robustness in high-EMI industrial transmitters-making it optimal for legacy-replacement and mechanically constrained designs where ±1.0% tolerance is acceptable.
Availability
LM4040DIZ-5.0/LFT1 is available at Aetrix Electronics and suitable for field transmitters, data acquisition systems, and analog input modules requiring stable component supply with long-lifecycle support and consistent TO-92 mechanical form factor.
Supply support for LM4040DIZ-5.0/LFT1 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 product line delivers micropower shunt references optimized for space-constrained, low-noise industrial and automotive applications-emphasizing ease of use, stability without external components, and extended temperature reliability.
FAQ
What is the operating temperature range for LM4040DIZ-5.0/LFT1?
The LM4040DIZ-5.0/LFT1 is rated for industrial temperature operation from −40°C to +85°C. This range is validated per its Grade D specification and applies across all electrical parameters in the datasheet's Recommended Operating Conditions table. It does not support extended −40°C to +125°C operation, which is reserved for LM4040-N-Q1 automotive variants.
Does LM4040DIZ-5.0/LFT1 require an output capacitor?
No, the LM4040DIZ-5.0/LFT1 does not require an output capacitor. Its internal design provides inherent stability with capacitive loads up to at least 100 nF, eliminating the need for external stabilization-unlike many series references. This reduces BOM count and improves reliability in space-constrained designs.
What is the minimum cathode current needed for LM4040DIZ-5.0/LFT1 to regulate at 5.0 V?
The LM4040DIZ-5.0/LFT1 requires a minimum cathode current of 74 μA at 25°C to maintain regulation at its nominal 5.0 V output. This value increases slightly over temperature, reaching 70 μA at the full −40°C to +85°C range per Electrical Characteristics Table 5.9.
How is the pinout configured on LM4040DIZ-5.0/LFT1?
The LM4040DIZ-5.0/LFT1 uses a 3-pin TO-92 package with bottom-view orientation: Pin 1 is Cathode (output node), Pin 2 is Anode (ground reference), and Pin 3 is NC (no connect). Per TI's guidance, Pin 3 must either float or be tied to Pin 2 to reduce EMI susceptibility in noisy environments.
Is LM4040DIZ-5.0/LFT1 AEC-Q200 qualified?
No, LM4040DIZ-5.0/LFT1 is not AEC-Q200 qualified. It belongs to the LM4040-N industrial-grade family. For automotive applications requiring AEC-Q100 qualification, TI offers the LM4040-N-Q1 series (e.g., LM4040DQ50IDBZR), which includes extended temperature grade (−40°C to +125°C) and stress-tested reliability.
LM4040DIZ-5.0/LFT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 85 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040DIZ-5.0/LFT1 FAQ
1.How can I place an order for LM4040DIZ-5.0/LFT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIZ-5.0/LFT1 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-5.0/LFT1 reliable?
The price and inventory of LM4040DIZ-5.0/LFT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIZ-5.0/LFT1 is usually 5 days.
3.What payment methods are accepted for LM4040DIZ-5.0/LFT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIZ-5.0/LFT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIZ-5.0/LFT1?
LM4040DIZ-5.0/LFT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIZ-5.0/LFT1 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-5.0/LFT1?
For technical support, including LM4040DIZ-5.0/LFT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIZ-5.0/LFT1 requirements.
6.How does Aetrix verify that LM4040DIZ-5.0/LFT1 is sourced from the original manufacturer or authorized distributors?
All LM4040DIZ-5.0/LFT1 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-5.0/LFT1 meets industry standards.
7.What is the process for return or replacement of LM4040DIZ-5.0/LFT1?
All LM4040DIZ-5.0/LFT1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIZ-5.0/LFT1, 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-5.0/LFT1 part is unused and in its original packaging.
Return procedure for LM4040DIZ-5.0/LFT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DIZ-5.0/LFT1 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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