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Texas Instruments LM4040AIM3X-2.0
- Part No.:
- LM4040AIM3X-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3X-2.0.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,699
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Product details
Overview
LM4040AIM3X-2.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 2.048 V reverse breakdown voltage with ±0.1% initial tolerance (A grade) at 25°C, 60 μA to 15 mA operating current range, and 100 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040AIM3X-2.0 datasheet, LM4040AIM3X-2.0 pinout, LM4040AIM3X-2.0 application, or LM4040AIM3X-2.0 equivalent, this page provides verified pin functions, industrial-grade thermal performance (−40°C to +85°C), noise (35 μVrms, 10 Hz–10 kHz), dynamic impedance (0.3–0.8 Ω), and direct alternative part comparisons.
Technical Context
The LM4040AIM3X-2.0 operates as a two-terminal shunt reference: cathode accepts input current while anode is grounded, regulating output voltage across its terminals via Zener-zap trimmed bandgap architecture. It requires no external capacitor and remains stable with capacitive loads up to 10 nF.
Its design integrates curvature-corrected bandgap reference and low-dynamic-impedance Zener structure to maintain ±0.75% total voltage tolerance over −40°C to +85°C (A grade), with thermal hysteresis of only 0.08% after −40°C/125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - sets precise bias point for 12-bit ADCs and low-power analog front-ends. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables single-point calibration in high-accuracy measurement systems. |
| Temp Coefficient | ≤100 ppm/°C (max, −40°C to +85°C) - ensures ≤±0.13 mV drift over full industrial range. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current DAC references without redesign. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes quantization error in 16-bit data acquisition. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - maintains regulation stability under fast load transients in battery-powered devices. |
| Long-Term Stability | 120 ppm (1000 hrs at 25°C) - reduces recalibration frequency in field-deployed test equipment. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC MO-178 compatible. Anode (pin 2) grounded; cathode (pin 1) carries shunt current and defines regulated voltage node; pin 3 is NC (no connect), must float or tie to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to supply rail; sinks all current not drawn by load - defines VOUT = 2.048 V relative to anode. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; forms return path for shunt current and establishes voltage reference plane. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; leave floating or tie to pin 2 - no electrical function, avoids parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts in wearables and IoT sensors without stability risk. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - eliminates need for isolation resistors in ADC reference paths. |
| Fuse-and-Zener-zap trimming | Ensures ±0.1% initial accuracy at wafer sort - reduces post-packaging calibration overhead. |
| Bandgap curvature correction | Minimizes parabolic drift across −40°C to +85°C - achieves ±0.75% total tolerance without external compensation. |
| Low 35 μVrms noise | Preserves effective resolution in 16-bit SAR ADCs without added filtering or oversampling. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing 2.048 V reference for ADC and internal DAC calibration. Use Value: 60 μA minimum operating current extends battery life beyond 1 year; ±0.1% tolerance eliminates factory trim steps. |
Use Scenario: Industrial vibration monitor using MEMS accelerometer and 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision voltage reference for signal conditioning amplifier bias and ADC reference rail. Use Value: 100 ppm/°C tempco ensures <±0.2 LSB error over −25°C to +70°C ambient; 35 μVrms noise avoids SNR degradation. |
| Energy Management Units | Precision Sensor Nodes |
|
Use Scenario: Smart electricity meter with isolated current sensing and metrology-grade ADC. IC Role / Device Role / Timing Role: Stable 2.048 V reference for anti-aliasing filter op-amps and reference buffer stages. Use Value: Low dynamic impedance (0.3 Ω) prevents gain error under pulsed load conditions during sampling bursts. |
Use Scenario: Wireless temperature/humidity sensor node with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Micropower shunt reference powering RTD bridge excitation and ADC reference simultaneously. Use Value: 60–15,000 μA operating range allows shared current source between bridge and ADC - cuts BOM count by one LDO. |
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-23-3, but higher 75 ppm/°C max tempco and 50 μVrms noise | Less suitable for 16-bit DAQ; acceptable for 12-bit industrial controls with relaxed noise budget | Select when lower cost is prioritized over noise and tempco; verify layout for 50 μVrms contribution to system ENOB. |
| MAX6002AEUR+T | 2.048 V, ±0.1%, SOT-23-3, but 150 μA min operating current and no extended temp grade support | Not viable for sub-100 μA battery systems; limited to commercial-temp embedded controllers | Choose only for cost-sensitive consumer designs where 150 μA min current and 0°C–70°C operation are acceptable. |
Compared with TL4050A20IDBZR and MAX6002AEUR+T, the LM4040AIM3X-2.0 delivers superior thermal stability (100 vs. 75/150 ppm/°C) and lower noise (35 vs. 50/- μVrms), making it the preferred choice for battery-powered precision measurement where current efficiency and drift control are critical.
Availability
LM4040AIM3X-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management units requiring stable component supply with guaranteed long-term continuity and traceable TI sourcing.
Supply support for LM4040AIM3X-2.0 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 industrial-grade reliability.
The LM4040-N series was designed for space-constrained, battery-operated precision applications - delivering micropower shunt reference performance with zero external components and automotive-grade variants (LM4040-Q1).
FAQ
What is the exact reverse breakdown voltage of LM4040AIM3X-2.0 at 25°C?
The LM4040AIM3X-2.0 has a nominal reverse breakdown voltage of 2.048 V at 25°C, with a maximum initial tolerance of ±0.1% (±2.05 mV) for the A-grade device. This value is production-tested at 100 μA test current and remains stable across its 60 μA–15 mA operating range.
Does LM4040AIM3X-2.0 require an external capacitor for stability?
No, the LM4040AIM3X-2.0 does not require an external output capacitor. Its internal architecture ensures inherent stability with any capacitive load up to 10 nF, simplifying layout in compact PCBs and eliminating capacitor-related aging or ESR concerns in the LM4040AIM3X-2.0 reference path.
What is the minimum operating current for LM4040AIM3X-2.0?
The LM4040AIM3X-2.0 requires a minimum operating current of 60 μA at 25°C to maintain regulation within specification. At full industrial temperature range (−40°C to +85°C), the minimum increases to 65 μA - verified per TI's Electrical Characteristics Table 6.5 for A-grade 2-V devices.
Is LM4040AIM3X-2.0 qualified for automotive applications?
No, LM4040AIM3X-2.0 is the industrial-grade variant (temperature range −40°C to +85°C). For automotive use, TI offers the LM4040QAIM3X-2.0 (AEC-Q100 Grade 3, −40°C to +125°C), which shares identical electrical specs but undergoes additional qualification testing - LM4040AIM3X-2.0 itself is not AEC-Q100 certified.
What is the thermal hysteresis performance of LM4040AIM3X-2.0?
The LM4040AIM3X-2.0 exhibits 0.08% thermal hysteresis - defined as the voltage difference measured at 25°C after cycling from −40°C and from +125°C. This low hysteresis ensures repeatable reference accuracy in systems undergoing repeated thermal cycles, such as outdoor environmental sensors using LM4040AIM3X-2.0.
LM4040AIM3X-2.0 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:
- Obsolete
- 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 FAQ
1.How can I place an order for LM4040AIM3X-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3X-2.0 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 reliable?
The price and inventory of LM4040AIM3X-2.0 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 is usually 5 days.
3.What payment methods are accepted for LM4040AIM3X-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3X-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3X-2.0?
LM4040AIM3X-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3X-2.0 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?
For technical support, including LM4040AIM3X-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3X-2.0 requirements.
6.How does Aetrix verify that LM4040AIM3X-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3X-2.0 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 meets industry standards.
7.What is the process for return or replacement of LM4040AIM3X-2.0?
All LM4040AIM3X-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3X-2.0, 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 part is unused and in its original packaging.
Return procedure for LM4040AIM3X-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3X-2.0 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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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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