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Texas Instruments LM4040AIM3X-2.0/NOPB
- Part No.:
- LM4040AIM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,322
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Product details
Overview
LM4040AIM3X-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 2.048 V reverse breakdown voltage with ±0.1% initial tolerance (A grade), 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 LM4040AIM3X-2.0/NOPB datasheet, LM4040AIM3X-2.0/NOPB pinout, LM4040AIM3X-2.0/NOPB application, or LM4040AIM3X-2.0/NOPB equivalent, this device serves as a stable, low-noise, space-efficient reference for high-accuracy analog signal chains in field transmitters, data acquisition systems, and automotive sensor interfaces where tight voltage regulation and thermal stability are critical.
Technical Context
The LM4040AIM3X-2.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.1% accuracy at 25°C and incorporates bandgap-based temperature drift curvature correction. Its low dynamic impedance (0.3–0.8 Ω) ensures minimal voltage shift across operating current (60 μA–15 mA) and temperature (−40°C to +85°C).
Designed as a two-terminal shunt reference, it functions by sinking current through its cathode to maintain a precise 2.048 V across external load/resistor networks. It tolerates capacitive loads without oscillation and exhibits only 0.08% thermal hysteresis after cycling between −40°C and +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - sets exact reference point for ADCs, DACs, and sensor excitation circuits. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables single-point calibration in high-accuracy measurement systems without trimming. |
| Temp Coefficient | ≤100 ppm/°C (max) - limits voltage drift to ±0.016 V over −40°C to +85°C, supporting industrial-grade stability. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current biasing in analog front-ends. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes added noise in precision 16-bit+ data acquisition paths. |
| Dynamic Impedance | 0.3–0.8 Ω - maintains voltage regulation under fast load transients and varying supply conditions. |
| Thermal Hysteresis | 0.08% - ensures repeatable reference voltage after thermal cycling, critical for field-deployed instrumentation. |
Pinout & Package
SOT-23-3 package (DBZ), 2.92 mm × 1.30 mm body size, surface-mount, JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current input/output node - connects to regulated voltage rail; sinks current to hold 2.048 V across external resistor/load. |
| Anode (Pin 2) | O | Ground reference terminal - must be connected to system ground; defines return path for shunt current. |
| NC (Pin 3) | - | No-connect - internally unconnected; must be left floating or tied to anode per EMI mitigation guidance. |
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 load capacitance - simplifies filtering and decoupling design for noisy environments. |
| Zener-zap voltage trim | Ensures ±0.1% initial accuracy at wafer level - eliminates post-package calibration and reduces test time. |
| Low quiescent current | 60 μA minimum operating current - extends battery life in portable and wireless sensor applications. |
| AEC-Q100 qualified (Grade 3) | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
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 current-loop compliance voltage generation. Use Value: ±0.1% initial tolerance and ≤100 ppm/°C drift ensure <0.2% total error over full industrial temperature range without recalibration. |
Use Scenario: 16-bit isolated analog input module for PLC backplane. IC Role / Device Role / Timing Role: Precision reference for SAR ADC and signal-conditioning op-amp biasing. Use Value: 35 μVrms noise and 0.3 Ω dynamic impedance preserve ENOB >15.5 bits in 100 kSPS sampling. |
| Automotive Sensors | Analog Input Module |
Use Scenario: Tire pressure monitoring system (TPMS) ECU with integrated MEMS sensor. IC Role / Device Role / Timing Role: Reference for ratiometric sensor excitation and ADC reference in AEC-Q100 Grade 3 environment. Use Value: Qualified to −40°C to +85°C with 0.08% thermal hysteresis ensures consistent readings across seasonal vehicle operation. |
Use Scenario: Industrial multi-channel analog input card with cold-junction compensation. IC Role / Device Role / Timing Role: Stable 2.048 V reference for thermocouple amplifier gain-setting and ADC reference. Use Value: Fixed 2.048 V matches common 12-bit/16-bit ADC full-scale ranges (e.g., 2.048 V = 4096 LSB), eliminating scaling math. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3X-2.0/NOPB | ±0.5% initial tolerance, same 2.048 V output and SOT-23 package | Lower accuracy; suitable for cost-sensitive industrial controls where ±0.5% is acceptable | Select when budget constraints outweigh need for highest precision; retains identical layout and thermal profile. |
| REF3020AIDBZR | 2.048 V, ±0.2% initial tolerance, 50 ppm/°C tempco, higher 100 μA min current | Series topology - requires input headroom; not a drop-in replacement for shunt configurations | Choose only if redesign allows series-reference topology and tighter tempco is prioritized over micropower operation. |
Compared with LM4040CIM3X-2.0/NOPB and REF3020AIDBZR, the LM4040AIM3X-2.0/NOPB uniquely combines A-grade precision, shunt topology flexibility, and 60 μA minimum current - making it optimal for battery-powered, space-limited, high-accuracy analog systems where layout compatibility and low quiescent power are non-negotiable.
Availability
LM4040AIM3X-2.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, data acquisition systems, and automotive sensor interfaces requiring stable component supply, long-term production continuity, and AEC-Q100-compliant sourcing.
Supply support for LM4040AIM3X-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in precision reference design.
The LM4040-N family was engineered for space-constrained, high-stability analog systems - targeting industrial process control, automotive sensing, and portable instrumentation where micropower, accuracy, and reliability are essential.
FAQ
What is the output voltage tolerance of LM4040AIM3X-2.0/NOPB at 25°C?
The LM4040AIM3X-2.0/NOPB has a guaranteed initial reverse breakdown voltage tolerance of ±0.1% at 25°C (A grade), corresponding to ±2.05 mV around the nominal 2.048 V output. This specification is 100% production tested and enables high-accuracy calibration without trimming in the LM4040AIM3X-2.0/NOPB's target applications.
Does LM4040AIM3X-2.0/NOPB require an external output capacitor?
No, the LM4040AIM3X-2.0/NOPB does not require an external output capacitor due to its internally compensated design. It remains stable with any capacitive load up to at least 10 nF, simplifying layout and reducing BOM count - a key advantage confirmed in the LM4040AIM3X-2.0/NOPB datasheet Section 3 and Figure 8-1.
What is the minimum operating current for LM4040AIM3X-2.0/NOPB?
The LM4040AIM3X-2.0/NOPB specifies a minimum operating current of 60 μA at 25°C, with 65 μA maximum over the full −40°C to +85°C industrial temperature range. This ultra-low current enables use in energy-harvesting and battery-operated systems while maintaining 2.048 V regulation - a verified parameter in LM4040AIM3X-2.0/NOPB Electrical Characteristics Table 5.5.
Is LM4040AIM3X-2.0/NOPB AEC-Q100 qualified?
Yes, the LM4040AIM3X-2.0/NOPB is AEC-Q100 qualified for automotive applications under Grade 3 (−40°C to +85°C ambient), as explicitly stated in the "Features" section of the official LM4040-N datasheet. This qualification covers stress testing, reliability, and failure mechanisms relevant to automotive ECUs and sensor modules.
What package type does LM4040AIM3X-2.0/NOPB use?
The LM4040AIM3X-2.0/NOPB uses the SOT-23-3 (DBZ) package: a 3-pin, surface-mount, plastic small-outline transistor package measuring 2.92 mm × 1.30 mm. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC - confirmed in the LM4040AIM3X-2.0/NOPB Pin Configuration diagram (Figure 4-1) and Package Marking Information (Section 11.1).
LM4040AIM3X-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
LM4040AIM3X-2.0/NOPB FAQ
1.How can I place an order for LM4040AIM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3X-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 LM4040AIM3X-2.0/NOPB reliable?
The price and inventory of LM4040AIM3X-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 LM4040AIM3X-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040AIM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3X-2.0/NOPB?
LM4040AIM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3X-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 LM4040AIM3X-2.0/NOPB?
For technical support, including LM4040AIM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040AIM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3X-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 LM4040AIM3X-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040AIM3X-2.0/NOPB?
All LM4040AIM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3X-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 LM4040AIM3X-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040AIM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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