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Texas Instruments LM4040AIM3-2.0/NOPB
- Part No.:
- LM4040AIM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,975
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Product details
Overview
LM4040AIM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference with 2.048 V nominal reverse breakdown voltage, ±0.1% initial tolerance (Grade A), 100 ppm/°C max temperature coefficient, and operation from 60 μA to 15 mA over −40°C to +85°C. It delivers stable reference voltage in space-constrained analog signal chains for data acquisition and field transmitters.
For engineers reviewing the LM4040AIM3-2.0/NOPB datasheet, LM4040AIM3-2.0/NOPB pinout, LM4040AIM3-2.0/NOPB application, or LM4040AIM3-2.0/NOPB equivalent, key selection criteria include its SOT-23 package, no-output-capacitor requirement, low 35 μVrms noise (10 Hz–10 kHz), and compatibility with capacitive loads in industrial-grade shunt reference designs.
Technical Context
The LM4040AIM3-2.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.1% accuracy at 25°C and incorporates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (0.3–0.8 Ω) ensures minimal output voltage shift across operating current (60 μA–15 mA).
Designed as a two-terminal shunt device, it operates without an external stabilization capacitor and tolerates arbitrary capacitive loading-enabling direct integration into ADC reference inputs, sensor excitation circuits, and programmable logic supply monitors where layout simplicity and board space are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.048 V nominal reverse breakdown voltage - matches common 12-bit DAC/ADC full-scale scaling (e.g., 2.048 V = 1 LSB × 4096) |
| Initial Tolerance | ±0.1% at 25°C (Grade A) - enables high-accuracy calibration without post-manufacture trimming |
| Temp Coefficient | ≤100 ppm/°C (max) - limits drift to ±8.2 mV over −40°C to +85°C ambient range |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current precision regulators |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - suitable for 16-bit+ data acquisition systems without additional filtering |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - minimizes load-induced voltage error in varying-current applications |
| Thermal Hysteresis | 0.08% - ensures repeatable voltage after thermal cycling between −40°C and +125°C |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, body size 2.92 mm × 1.30 mm, rated for 306 mW power dissipation at 25°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Internally connected to substrate; must be tied to system ground or low-impedance return path |
| Cathode (Pin 1) | Shunt current input / output voltage node | Carries all reference current; voltage at this pin is the regulated 2.048 V relative to Anode |
| NC (Pin 3) | No-connect terminal | Must float or be tied to Anode (Pin 2); recommended for EMI-sensitive layouts near transformers or switching noise sources |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Eliminates BOM cost and PCB area for stability compensation; simplifies layout in tight spaces |
| Capacitive load tolerance | Stable with any value of output capacitance - enables direct connection to ADC reference inputs or op-amp feedback networks |
| Zener-zap voltage trim | Ensures ±0.1% initial accuracy without laser trimming - improves yield and long-term reliability |
| Low quiescent current | 60 μA minimum operating current - supports battery-powered field instruments with multi-year runtime |
| Industrial temperature range | −40°C to +85°C operation - qualified for use in factory automation, energy metering, and process control environments |
Applications
| Field Transmitter | Data Acquisition |
|---|---|
Use Scenario: 4–20 mA loop-powered sensor transmitter with integrated ADC and microcontroller. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for 12-bit SAR ADC and DAC used in analog output scaling. Use Value: Enables single-supply 3.3 V operation with full 12-bit code utilization (0–4095) and <±1 LSB total unadjusted error over temperature. |
Use Scenario: Portable handheld multimeter with dual-slope or sigma-delta ADC. IC Role / Device Role / Timing Role: Primary voltage reference for precision analog front-end, powering sensor excitation and ADC reference rails. Use Value: 35 μVrms noise and 100 ppm/°C TC ensure ≤0.01% measurement uncertainty across operating temperature range. |
| Analog Input Module | Energy Infrastructure |
Use Scenario: DIN-rail mounted PLC analog input card accepting 0–10 V or ±10 V signals. IC Role / Device Role / Timing Role: Reference source for programmable gain instrumentation amplifier and multiplexed ADC channel. Use Value: Low dynamic impedance maintains reference accuracy despite channel-switching transient currents up to 15 mA. |
Use Scenario: Smart electricity meter with metrology-grade ADC and isolation barrier. IC Role / Device Role / Timing Role: Secondary reference for anti-tampering voltage monitoring circuit and RTC backup supply regulation. Use Value: Thermal hysteresis ≤0.08% prevents calibration drift after repeated thermal cycling in outdoor enclosures. |
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, but requires ≥1 nF output capacitor for stability | Limited in capacitor-free designs; higher dynamic impedance (1.5 Ω typical) | Choose if existing design already includes output capacitor and TI second-source assurance is required |
| MAX6002AES20+T | 2.048 V, ±0.1%, SC70-3, 50 μVrms noise, 65 ppm/°C TC, 45 μA min current | Lower noise and tighter TC, but SC70 footprint differs and max current limited to 10 mA | Prefer for ultra-low-noise 16-bit systems where SOT-23-to-SC70 layout change is acceptable |
Compared with TL4050A20IDBZR and MAX6002AES20+T, the LM4040AIM3-2.0/NOPB uniquely combines capacitor-free operation, 0.8 Ω dynamic impedance, and 15 mA drive capability in SOT-23-making it optimal for high-current, space-constrained industrial analog modules.
Availability
LM4040AIM3-2.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, data acquisition systems, and analog input modules requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040AIM3-2.0/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-qualified components.
The LM4040-N series was designed for space-critical industrial and automotive applications demanding high initial accuracy, low drift, and robust capacitive-load stability without external compensation.
FAQ
What is the minimum operating current for LM4040AIM3-2.0/NOPB?
The LM4040AIM3-2.0/NOPB has a minimum operating current of 60 μA at 25°C, rising to 65 μA across the full −40°C to +85°C industrial temperature range. This low threshold enables use in ultra-low-power sensor nodes and battery-backed systems where supply current must remain below 100 μA.
Does LM4040AIM3-2.0/NOPB require an external output capacitor?
No, the LM4040AIM3-2.0/NOPB does not require an external output capacitor for stability. Its internal architecture tolerates arbitrary capacitive loads, allowing direct connection to ADC reference pins or op-amp inputs without added components-reducing BOM count and PCB area in compact designs.
What is the temperature coefficient specification for LM4040AIM3-2.0/NOPB?
The LM4040AIM3-2.0/NOPB has a maximum average temperature coefficient of 100 ppm/°C over −40°C to +85°C. This translates to a worst-case voltage drift of ±8.2 mV across the full industrial temperature range, supporting applications requiring high stability without active temperature compensation.
How is the LM4040AIM3-2.0/NOPB pinout configured in SOT-23?
In the SOT-23 (DBZ) package, LM4040AIM3-2.0/NOPB has Cathode on Pin 1, Anode on Pin 2, and NC on Pin 3. Pin 3 must either float or connect to Pin 2 (Anode); TI recommends tying it to Anode in EMI-prone environments such as near switching power supplies or transformers.
Is LM4040AIM3-2.0/NOPB qualified for automotive applications?
No, LM4040AIM3-2.0/NOPB is the industrial-grade variant (Temperature Grade I, −40°C to +85°C). For automotive use, select the LM4040AQIM3-2.0/NOPB (AEC-Q100 Grade 3) or LM4040QAIM3-2.0/NOPB (AEC-Q100 Grade 1, −40°C to +125°C), which include extended qualification testing and traceability.
LM4040AIM3-2.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AIM3-2.0/NOPB FAQ
1.How can I place an order for LM4040AIM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3-2.0/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 LM4040AIM3-2.0/NOPB reliable?
The price and inventory of LM4040AIM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040AIM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3-2.0/NOPB?
LM4040AIM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3-2.0/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 LM4040AIM3-2.0/NOPB?
For technical support, including LM4040AIM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040AIM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3-2.0/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 LM4040AIM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040AIM3-2.0/NOPB?
All LM4040AIM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3-2.0/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 LM4040AIM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040AIM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3-2.0/NOPB Tags
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