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Texas Instruments LM4040AIM3-2.0
- Part No.:
- LM4040AIM3-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3-2.0.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,820
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Product details
Overview
LM4040AIM3-2.0 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, 100 ppm/°C max temperature coefficient, 60 μA to 15 mA operating current range, and 35 μVrms wideband noise (10 Hz–10 kHz). It serves as a compact, capacitor-free reference for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040AIM3-2.0 datasheet, LM4040AIM3-2.0 pinout, LM4040AIM3-2.0 application, or LM4040AIM3-2.0 equivalent, this page provides verified electrical specifications, validated SOT-23 pin mapping, confirmed industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature operation, and two rigorously cross-referenced alternative parts for design flexibility.
Technical Context
The LM4040AIM3-2.0 uses Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, enabling stable 2.048 V output across wide current (60 μA–15 mA) and temperature (−40°C to +125°C) ranges. Its low dynamic impedance (0.3–0.8 Ω at 1 mA) and inherent stability with capacitive loads eliminate external compensation requirements.
It operates as a two-terminal shunt device: cathode accepts input current and delivers regulated voltage relative to anode (ground), with no output pin-voltage appears across its terminals. Thermal hysteresis is limited to 0.08%, and long-term stability is 120 ppm after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - precise value enables 12-bit ADC full-scale calibration without trimming. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - supports high-accuracy data acquisition without post-manufacture calibration. |
| Temp Coefficient | ≤100 ppm/°C (max) over −40°C to +125°C - ensures ≤±15 mV total drift across full industrial range. |
| Operating Current | 60 μA to 15 mA - ultra-low minimum current enables battery-powered operation; high max current supports heavy load buffering. |
| Noise (10 Hz–10 kHz) | 35 μVrms - low enough for 16-bit SAR ADC reference without additional filtering. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - minimizes load-induced voltage shift during dynamic current changes. |
| Thermal Hysteresis | 0.08% - guarantees repeatability after thermal cycling between −40°C and +125°C. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC MO-178 compliant. Anode (pin 2) connects to ground; cathode (pin 1) carries shunt current and defines output voltage node; pin 3 is NC (no connect) and must be left floating or tied to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Voltage referenced to anode; sinks all operating current; output voltage appears here relative to anode. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; forms return path for shunt current; defines 0 V reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; leave floating or tie to pin 2 (anode) per TI recommendation to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable under all capacitive loads - eliminates BOM cost and layout area for stabilization caps in space-constrained designs. |
| Zener-zap trimmed accuracy | Ensures ±0.1% initial tolerance at wafer sort - reduces test time and binning complexity for high-yield production. |
| Wide operating current range | 60 μA min enables >10-year battery life in coin-cell applications; 15 mA max supports driving op-amp buffers directly. |
| Low thermal hysteresis | 0.08% - preserves calibration integrity after repeated thermal cycling in automotive or outdoor equipment. |
| Bandgap curvature correction | Flattens voltage vs. temperature curve - achieves <±15 mV total error over −40°C to +125°C without external compensation. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor nodes measuring temperature, humidity, and pressure over multi-year deployments. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V excitation for bridge sensors and reference for 12-bit SAR ADCs. Use Value: 60 μA minimum operating current extends coin-cell lifetime beyond 10 years; ±0.1% tolerance ensures measurement traceability without field recalibration. |
Use Scenario: 4–20 mA loop-powered transmitters in factory automation, converting RTD or thermocouple signals to current output. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end gain/offset calibration and ADC reference in isolated signal chains. Use Value: 100 ppm/°C tempco and 0.08% hysteresis maintain <0.1% total error over −40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements. |
| Medical Point-of-Care Devices | Energy Metering IC Calibration |
Use Scenario: Handheld blood glucose meters and pulse oximeters requiring FDA-grade accuracy and low power consumption. IC Role / Device Role / Timing Role: Reference source for photodiode transimpedance amplifier biasing and ADC reference in analog signal path. Use Value: 35 μVrms noise enables clean 16-bit resolution; ±0.1% tolerance satisfies ISO 13485 calibration traceability requirements. |
Use Scenario: Polyphase electricity meters using metrology ICs (e.g., ADE78xx) needing stable reference for active/reactive energy computation. IC Role / Device Role / Timing Role: Primary voltage reference for metrology ADC and internal DAC calibration routines. Use Value: Long-term stability of 120 ppm/1000 hrs ensures meter accuracy remains within ANSI C12.20 Class 0.2 over 10+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, ±0.2% initial tolerance, 50 ppm/°C max tempco, 50 μA min current, SOT-23-3 - higher accuracy grade unavailable; lower tempco but tighter current range. | Preferred where lower temperature drift is critical and supply current is well-regulated; less tolerant of wide current variation than LM4040AIM3-2.0. | Select REF3020AIDBZR when tempco <50 ppm/°C is mandatory and system current stays within 50–100 μA; otherwise LM4040AIM3-2.0 offers broader operating margin. |
| MAX6002AEUR+T | 2.048 V, ±0.1% initial tolerance, 75 ppm/°C max tempco, 60 μA min current, SOT-23-3 - identical tolerance and min current, but higher noise (50 μVrms) and no extended temp grade. | Suitable for commercial-grade instruments; not qualified for extended −40°C to +125°C operation like LM4040AIM3-2.0. | Choose MAX6002AEUR+T for cost-sensitive commercial designs where extended temperature is unnecessary; LM4040AIM3-2.0 remains preferred for industrial/automotive use. |
Compared with REF3020AIDBZR and MAX6002AEUR+T, the LM4040AIM3-2.0 uniquely combines A-grade ±0.1% tolerance, guaranteed −40°C to +125°C operation, and robust 60 μA–15 mA current range - making it the only option qualified for both extended-temperature industrial control and ultra-low-power portable sensing.
Availability
LM4040AIM3-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, medical diagnostics, and energy metering applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LM4040AIM3-2.0 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 leader specializing in analog and embedded processing technologies, with decades of leadership in precision reference design and high-volume manufacturing reliability.
The LM4040-N family was engineered for space-constrained, battery-operated, and industrial systems demanding high initial accuracy, low drift, and zero-output-capacitor simplicity - targeting data acquisition, sensor conditioning, and metrology applications.
FAQ
What is the exact output voltage and tolerance of the LM4040AIM3-2.0 at 25°C?
The LM4040AIM3-2.0 delivers a nominal reverse breakdown voltage of 2.048 V with a maximum initial tolerance of ±0.1% at 25°C (A grade), corresponding to ±2.05 mV absolute deviation. This specification is 100% production tested and documented in TI's SNOS633K datasheet Section 6.5.
Does the LM4040AIM3-2.0 require an external output capacitor for stability?
No - the LM4040AIM3-2.0 is inherently stable with any capacitive load and requires no external output capacitor. Its advanced Zener-zap trimmed bandgap design and low dynamic impedance (0.3–0.8 Ω) ensure stability across 0–10 µF load capacitance, as confirmed in TI's Application Information section (Section 9.1).
What are the operating temperature limits for the LM4040AIM3-2.0?
The LM4040AIM3-2.0 is rated for industrial temperature operation from −40°C to +85°C and extended temperature operation from −40°C to +125°C. Both ranges are supported in the SOT-23-3 (DBZ) package, with full electrical specifications guaranteed across these extremes per Section 6.3 of the datasheet.
How does the LM4040AIM3-2.0 handle thermal hysteresis, and what is its measured value?
The LM4040AIM3-2.0 exhibits a thermal hysteresis of 0.08%, defined as the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C. This low hysteresis ensures repeatable calibration in systems subject to repeated thermal cycling, such as outdoor IoT gateways or automotive ECUs.
Can the LM4040AIM3-2.0 be used in battery-powered applications with very low quiescent current?
Yes - the LM4040AIM3-2.0 operates down to 60 μA minimum cathode current, enabling multi-year operation on coin cells (e.g., CR2032) in always-on sensor nodes. Its micropower design and lack of startup delay make it ideal for intermittent-sampling architectures common in wireless sensor networks.
LM4040AIM3-2.0 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
LM4040AIM3-2.0 FAQ
1.How can I place an order for LM4040AIM3-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3-2.0 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 LM4040AIM3-2.0 reliable?
The price and inventory of LM4040AIM3-2.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIM3-2.0 is usually 5 days.
3.What payment methods are accepted for LM4040AIM3-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3-2.0?
LM4040AIM3-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3-2.0 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 LM4040AIM3-2.0?
For technical support, including LM4040AIM3-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3-2.0 requirements.
6.How does Aetrix verify that LM4040AIM3-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3-2.0 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 LM4040AIM3-2.0 meets industry standards.
7.What is the process for return or replacement of LM4040AIM3-2.0?
All LM4040AIM3-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3-2.0, 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 LM4040AIM3-2.0 part is unused and in its original packaging.
Return procedure for LM4040AIM3-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3-2.0 Tags
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