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Analog Devices Inc./Maxim Integrated LM4040DIM3-2.1+T
- Part No.:
- LM4040DIM3-2.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DIM3-2.1+T.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,746
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Product details
Overview
LM4040DIM3-2.1+T from Maxim Integrated is a precision 2.048V two-terminal shunt voltage reference in SOT23-3 package, featuring ±1.0% initial accuracy, ±150ppm/°C temperature coefficient, 60μA–15mA operating current range, and guaranteed operation from –40°C to +85°C. It serves as a stable reference in portable battery-powered systems where space and low quiescent current are critical.
For engineers reviewing the LM4040DIM3-2.1+T datasheet, LM4040DIM3-2.1+T pinout, LM4040DIM3-2.1+T application, or LM4040DIM3-2.1+T equivalent, key selection criteria include reverse breakdown voltage tolerance over temperature, dynamic impedance at 1mA, minimum operating current (70μA max), noise performance (28μVRMS), and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4040DIM3-2.1+T implements a bandgap-based shunt reference architecture, functioning like a precision zener diode with cathode-anode reverse bias. Its output voltage is stabilized via internal laser-trimmed resistors and operates without requiring an external capacitor, even under varying capacitive load conditions.
It delivers fixed 2.048V reverse breakdown voltage with grade-D accuracy (±1.0% at +25°C) and extended temperature coefficient (±150ppm/°C at 1mA), supporting stable regulation across industrial ambient ranges while maintaining low dynamic impedance (≤1.1Ω at 1mA, 120Hz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal; ±20mV tolerance at +25°C ensures predictable ADC/DAC reference point in low-voltage systems. |
| Initial Accuracy | ±1.0% (Grade D); guarantees worst-case deviation ≤±20.5mV at room temperature for calibration-critical designs. |
| Temp Coefficient | ±150ppm/°C (max at 1mA); contributes ≤±9.8mV drift over –40°C to +85°C, enabling stable performance in uncontrolled environments. |
| Operating Current | 60μA to 15mA; supports ultra-low-power sensor nodes (e.g., 60μA sleep mode) and higher-current analog front-ends. |
| Dynamic Impedance | ≤1.1Ω at 1mA, 120Hz; minimizes output voltage perturbation during load transients in precision feedback loops. |
| Output Noise | 28μVRMS (10Hz–10kHz); low enough for 12-bit+ data acquisition without additional filtering. |
| Long-Term Stability | 120ppm (1000h); predicts <0.012% output drift over 1 year, reducing recalibration needs in field-deployed equipment. |
Pinout & Package
LM4040DIM3-2.1+T is housed in a RoHS-compliant 3-pin SOT23 surface-mount package (2.92mm × 1.3mm × 1.0mm), optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; forms cathode-to-anode reverse bias path when used as shunt reference. |
| 2 (–) | Cathode (negative terminal) | Reference output node; sinks regulated current to maintain 2.048V across external load/resistor network. |
| 3 (N.C.) | No connection | Must remain unconnected or tied to pin 2; no internal functionality-leaving it floating avoids parasitic coupling or ESD risks. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct integration into space-constrained layouts without stability-compromising bypass components. |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or LDO feedback networks without oscillation risk. |
| Wide shunt current range | 60μA–15mA operation allows use in both micropower IoT sensors and higher-current analog subsystems. |
| Laser-trimmed accuracy | Ensures consistent 2.048V output across production lots without post-assembly trimming. |
| Stable over –40°C to +85°C | Validated performance across commercial/industrial temperature range without derating. |
Applications
| Portable, Battery-Powered Equipment | Notebook Computers |
|---|---|
Use Scenario: Reference for fuel-gauge ICs and battery-monitoring ADCs in handheld medical devices and wearables. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.048V基准 for 12-bit SAR ADC conversions. Use Value: Enables accurate state-of-charge estimation down to 60μA quiescent current, extending battery life by >20% vs. less efficient references. | Use Scenario: Precision reference for system management controller (SMC) voltage monitoring rails. IC Role / Device Role / Timing Role: Two-terminal shunt reference sourcing stable 2.048V to comparator inputs for rail fault detection. Use Value: Delivers ±1.0% accuracy over full temperature range, eliminating need for software calibration in thermal management firmware. |
| Cell Phones | Industrial Process Controls |
Use Scenario: Reference for touchscreen controller ADCs and camera sensor biasing circuits. IC Role / Device Role / Timing Role: Low-noise (28μVRMS), capacitor-tolerant shunt reference driving multiplexed analog front-end. Use Value: Maintains touch sensitivity accuracy across –20°C to +60°C operating envelope without external compensation. | Use Scenario: Calibration reference for 4–20mA loop transmitter DACs in PLC I/O modules. IC Role / Device Role / Timing Role: Stable 2.048V shunt reference feeding precision op-amp summing junctions in current-output stages. Use Value: ±150ppm/°C tempco ensures <0.1% full-scale error over –40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431IDBZR | Adjustable 1.24V–18V output; requires two external resistors; 2% initial accuracy; 90ppm/°C tempco. | Used where programmable reference voltage is needed; not drop-in for fixed 2.048V designs. | Select TLVH431IDBZR only if voltage adjustability and higher current drive (up to 100mA) outweigh fixed-voltage simplicity. |
| MAX6008AEUR+T | Fixed 2.048V; 0.2% initial accuracy; 50ppm/°C tempco; SC70-3 package; 100μA–20mA operating range. | Higher accuracy and lower tempco suit metrology-grade applications; smaller SC70 footprint increases layout density. | Choose MAX6008AEUR+T when ±0.2% accuracy and ±50ppm/°C stability are mandatory, and board area permits SC70 placement. |
Compared with LM4040DIM3-2.1+T, TLVH431IDBZR offers flexibility at the cost of accuracy and component count, while MAX6008AEUR+T provides superior precision and thermal stability in a smaller package-but at higher unit cost and reduced current headroom.
Availability
LM4040DIM3-2.1+T is available at Aetrix Electronics and suitable for portable, battery-powered equipment, notebook computers, cell phones, and industrial process controls requiring stable component supply with consistent lead times and full traceability.
Supply support for LM4040DIM3-2.1+T 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
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, automotive, and computing applications, emphasizing high reliability and low-power operation.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-sensitive systems requiring stable, fixed-output references without external compensation components.
FAQ
What is the exact reverse breakdown voltage specification for LM4040DIM3-2.1+T?
The LM4040DIM3-2.1+T is specified for a nominal reverse breakdown voltage of 2.048V at +25°C, with a Grade-D tolerance of ±20mV (±1.0%) at room temperature. Over the full –40°C to +85°C operating range, total tolerance expands to ±1.98% due to temperature coefficient effects, yielding ±40.5mV worst-case deviation from nominal.
Does LM4040DIM3-2.1+T require an external capacitor for stability?
No, the LM4040DIM3-2.1+T does not require an external capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or LDO feedback nodes-eliminating layout constraints and bill-of-materials overhead.
What is the minimum operating current for LM4040DIM3-2.1+T, and how does it vary with temperature?
The LM4040DIM3-2.1+T specifies a maximum minimum operating current (IRMIN) of 70μA across its –40°C to +85°C range. At +25°C, typical IRMIN is 45μA; this value increases slightly at temperature extremes but remains ≤70μA, ensuring reliable turn-on in low-power microcontroller wake-up circuits.
Can LM4040DIM3-2.1+T be used in automotive applications?
The LM4040DIM3-2.1+T is rated for –40°C to +85°C operation and is not AEC-Q100 qualified. For automotive applications requiring qualification, select LM4040DEM3-2.1+T (–40°C to +125°C, AEC-Q100 Grade 1) or LM4040DEM3-2.1/V+T variants explicitly marked for automotive use.
What is the function of pin 3 on LM4040DIM3-2.1+T, and how should it be handled?
Pin 3 of the LM4040DIM3-2.1+T is designated N.C. (no connection) and must either be left unconnected or tied directly to pin 2 (cathode). It has no internal connection; connecting it elsewhere may introduce leakage paths or ESD susceptibility, compromising reference accuracy and long-term reliability.
LM4040DIM3-2.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 28µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DIM3-2.1+T FAQ
1.How can I place an order for LM4040DIM3-2.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIM3-2.1+T 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 LM4040DIM3-2.1+T reliable?
The price and inventory of LM4040DIM3-2.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIM3-2.1+T is usually 5 days.
3.What payment methods are accepted for LM4040DIM3-2.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIM3-2.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIM3-2.1+T?
LM4040DIM3-2.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIM3-2.1+T 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 LM4040DIM3-2.1+T?
For technical support, including LM4040DIM3-2.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIM3-2.1+T requirements.
6.How does Aetrix verify that LM4040DIM3-2.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040DIM3-2.1+T 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 LM4040DIM3-2.1+T meets industry standards.
7.What is the process for return or replacement of LM4040DIM3-2.1+T?
All LM4040DIM3-2.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIM3-2.1+T, 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 LM4040DIM3-2.1+T part is unused and in its original packaging.
Return procedure for LM4040DIM3-2.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DIM3-2.1+T Tags
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