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Texas Instruments LM4040DEM3-2.0
- Part No.:
- LM4040DEM3-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-2.0.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,981
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Product details
Overview
LM4040DEM3-2.0 from Texas Instruments is a precision micropower shunt voltage reference with 2.048 V nominal reverse breakdown voltage, ±20 mV (±0.98%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, 65–73 μA min operating current over −40°C to +125°C, and 15 mA max operating current - used for accurate ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040DEM3-2.0 datasheet, LM4040DEM3-2.0 pinout, LM4040DEM3-2.0 application, or LM4040DEM3-2.0 equivalent, this page delivers verified specifications, SOT-23 package details, thermal hysteresis (0.08%), low-noise operation (35 μVrms), and direct alternative part comparisons for high-reliability embedded and automotive designs.
Technical Context
The LM4040DEM3-2.0 implements a bandgap-based Zener-zap trimmed shunt reference architecture with curvature-corrected temperature drift compensation. It operates as a two-terminal device where cathode regulates voltage against anode ground reference, requiring no output capacitor and tolerating capacitive loads up to 10 nF.
Its dynamic impedance is ≤1.1 Ω at 1 mA/120 Hz, enabling stable regulation under varying load currents (65 μA to 15 mA) across −40°C to +125°C. Long-term stability is 120 ppm after 1000 hours at 25°C, and thermal hysteresis is limited to 0.08% over −40°C ↔ 125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - precise enough for 12-bit ADC reference without trimming. |
| Initial Tolerance | ±20 mV (±0.98%) at 25°C - supports grade-D accuracy for cost-sensitive industrial applications. |
| Temp Coefficient | ≤100 ppm/°C (max) - ensures <±1.3 mV drift over −40°C to +85°C industrial range. |
| Min Operating Current | 65 μA at 25°C, 73 μA over −40°C to +125°C - enables ultra-low-power battery operation. |
| Max Operating Current | 15 mA - supports driving moderate loads like op-amp bias networks or small DACs. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA/120 Hz - maintains tight regulation during fast load transients. |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - suitable for precision analog signal chains without added filtering. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178AA compliant. Anode grounded, cathode supplies regulated voltage, third pin (NC) must float or connect to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated output node | Connects to supply rail via series resistor; sinks current to maintain 2.048 V at this node. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines zero-reference point for output voltage. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 (anode) per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables single-component voltage reference design with guaranteed stability into capacitive loads ≤10 nF. |
| Extended temperature range | Rated for −40°C to +125°C operation - qualified for under-hood automotive and industrial control environments. |
| Low dynamic impedance | ≤1.1 Ω ensures minimal output voltage shift (<11 mV) under 10 mA load step, critical for precision feedback loops. |
| Zener-zap voltage trim | Fuse-based wafer-sort trimming achieves ±20 mV initial accuracy without post-package calibration. |
| ESD robustness | ±2000 V HBM rating - withstands handling in standard manufacturing without special ESD controls. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter using 12-bit SAR ADC with internal reference replacement. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for ADC conversion accuracy. Use Value: Eliminates need for external buffer amplifier due to low dynamic impedance and capacitive load tolerance. |
Use Scenario: Isolated 4–20 mA transmitter with microcontroller-based signal conditioning. IC Role / Device Role / Timing Role: Precision excitation source for RTD or strain gauge bridge circuits. Use Value: 100 ppm/°C tempco ensures <±2.5 mV error over full industrial temperature range. |
| Automotive Sensor Modules | Energy Management Units |
Use Scenario: Cabin temperature sensor node with CAN interface and low-power sleep mode. IC Role / Device Role / Timing Role: Reference for thermistor-to-digital conversion in AFE stage. Use Value: 65 μA min operating current enables operation directly from wake-up LDO output. |
Use Scenario: Smart electricity meter measuring voltage/current with metrology-grade accuracy. IC Role / Device Role / Timing Role: Calibration reference for polyphase energy measurement ICs. Use Value: 120 ppm long-term stability reduces annual recalibration frequency in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C20IDBZR | 2.048 V, ±0.5% (±10.2 mV) initial tolerance, 75 ppm/°C max tempco, SOT-23 package. | Higher initial accuracy but wider tempco; requires tighter thermal layout for same drift performance. | Select when tighter room-temp accuracy is prioritized over extended-temperature drift control. |
| MAX6002EUR+T | 2.048 V, ±0.2% (±4.1 mV) initial tolerance, 50 ppm/°C max tempco, SOT-23 package. | Superior tempco and tighter initial spec, but higher 80 μA min operating current limits ultra-low-power use. | Select when system thermal management allows higher bias current and sub-50 ppm/°C drift is mandatory. |
Compared with TL4050C20IDBZR and MAX6002EUR+T, the LM4040DEM3-2.0 trades initial accuracy for lower minimum current and broader temperature qualification, making it optimal for cost-constrained, wide-temperature, battery-operated systems where ±0.98% tolerance is acceptable.
Availability
LM4040DEM3-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and energy management units requiring stable component supply across industrial and extended temperature ranges.
Supply support for LM4040DEM3-2.0 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 automotive-qualified components.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-powered, and safety-critical applications demanding stable voltage references across wide temperature ranges.
FAQ
What is the maximum operating current for LM4040DEM3-2.0?
The LM4040DEM3-2.0 supports a maximum operating current of 15 mA across its full temperature range (−40°C to +125°C). This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient, with appropriate derating applied at elevated temperatures per its 291.9°C/W junction-to-ambient thermal resistance.
Does LM4040DEM3-2.0 require an external capacitor for stability?
No, the LM4040DEM3-2.0 does not require an external output capacitor. Its internal design guarantees stability with any capacitive load up to 10 nF, simplifying PCB layout and reducing BOM count in space-constrained applications such as handheld test equipment and sensor nodes.
What is the temperature coefficient specification for LM4040DEM3-2.0?
The LM4040DEM3-2.0 has a maximum average temperature coefficient of 100 ppm/°C over −40°C to +125°C. This translates to a worst-case voltage drift of ±2.05 mV across the full extended temperature range, enabling predictable performance in automotive and industrial environments.
How is the LM4040DEM3-2.0 pinout configured in the SOT-23 package?
In the SOT-23 (DBZ) package, LM4040DEM3-2.0 has Cathode on Pin 1, Anode on Pin 2, and NC (no-connect) on Pin 3. Pin 3 must either float or be tied to Pin 2 (anode); it is not internally connected and serves no functional role in regulation.
What is the long-term stability of LM4040DEM3-2.0 after 1000 hours?
The LM4040DEM3-2.0 exhibits 120 ppm reverse breakdown voltage drift after 1000 hours of operation at 25°C and 100 μA bias current. This value reflects typical parametric shift under accelerated life testing and supports reliable calibration intervals in field-deployed instrumentation and metering systems.
LM4040DEM3-2.0 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3-2.0 FAQ
1.How can I place an order for LM4040DEM3-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-2.0 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 LM4040DEM3-2.0 reliable?
The price and inventory of LM4040DEM3-2.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-2.0 is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-2.0?
LM4040DEM3-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-2.0 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 LM4040DEM3-2.0?
For technical support, including LM4040DEM3-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-2.0 requirements.
6.How does Aetrix verify that LM4040DEM3-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-2.0 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 LM4040DEM3-2.0 meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-2.0?
All LM4040DEM3-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-2.0, 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 LM4040DEM3-2.0 part is unused and in its original packaging.
Return procedure for LM4040DEM3-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DEM3-2.0 Tags
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