My Inquiry
My Account
Analog Devices Inc./Maxim Integrated LM4040DIX3-2.1+T
- Part No.:
- LM4040DIX3-2.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040DIX3-2.1+T.pdf
- Description:
- IC VREF SHUNT 2.048V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040DIX3-2.1+T from Maxim Integrated is a precision 2.048V two-terminal shunt voltage reference in SC70-3 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 space-constrained battery-powered systems requiring low quiescent current and no external capacitor.
For engineers reviewing the LM4040DIX3-2.1+T datasheet, LM4040DIX3-2.1+T pinout, LM4040DIX3-2.1+T application, or LM4040DIX3-2.1+T equivalent, key selection criteria include reverse breakdown voltage tolerance over temperature, dynamic impedance at 1mA, wideband noise (28µVRMS), minimum operating current (70µA max), and SC70 footprint compatibility with high-density PCB layouts.
Technical Context
The LM4040DIX3-2.1+T implements a laser-trimmed bandgap reference core with fixed 2.048V reverse breakdown voltage. Its two-terminal architecture eliminates need for external biasing components, and it maintains regulation without output capacitance across any load capacitance.
It operates as a shunt device-sinking current through its cathode-to-anode path to hold a precise voltage across external load. The N.C. pin (Pin 3) must be left unconnected or tied to cathode (Pin 2), confirming strict two-terminal functional behavior despite three-pin SC70 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal; ±20mV (±1.0%) tolerance at +25°C ensures predictable ADC/DAC reference error budgeting |
| Tempco | ±150ppm/°C max over –40°C to +85°C; defines worst-case drift of ±12.4mV across full range |
| Operating Current | 60μA to 15mA shunt range; enables ultra-low-power sensor nodes and high-current reference buffering |
| Dynamic Impedance | ≤1.1Ω at 1mA/120Hz; ensures <10mV output shift under 10mA load transients |
| Noise (10Hz–10kHz) | 28µVRMS; supports 12-bit+ precision in low-noise analog front-ends |
| Long-Term Stability | 120ppm after 1000h; predicts <0.012% reference drift over 1-year continuous operation |
| Package | SC70-3 (1.8mm × 1.8mm); occupies 50% less board area than SOT23 equivalents |
Pinout & Package
SC70-3 surface-mount package (1.8mm × 1.8mm), RoHS-compliant, tape-and-reel delivery. Pin 3 is No Connection and must be left floating or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-biased terminal; connects to supply rail via series resistor to sink shunt current |
| 2 (–) | Anode | Reference ground node; ties to system ground or load return path |
| 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; no internal function or signal path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | Enables placement in 0402-class PCB real estate; critical for wearable and IoT edge sensors |
| No output capacitor required | Eliminates BOM cost and layout risk associated with stability-compensating capacitors |
| Tolerates any capacitive load | Supports direct connection to ADC input caps or long PCB traces without oscillation |
| 1.0% initial accuracy grade | Meets cost-sensitive industrial control and consumer electronics reference requirements |
| –40°C to +85°C operation | Validated for commercial and extended-temperature embedded applications |
Applications
| Portable Medical Sensors | Notebook Power Management |
|---|---|
Use Scenario: Battery-powered glucose meter with 12-bit SAR ADC requiring stable reference under varying battery voltage (2.8V–4.2V). IC Role / Device Role / Timing Role: Two-terminal shunt reference providing 2.048V reference to ADC while sinking variable current through series resistor. Use Value: Enables accurate glucose concentration calculation with <±0.5% full-scale error across battery discharge cycle and ambient temperature shifts. | Use Scenario: VRM feedback loop in notebook CPU voltage regulator where reference stability affects power efficiency and thermal throttling. IC Role / Device Role / Timing Role: Precision shunt reference setting target output voltage for buck controller error amplifier. Use Value: Maintains ±1% output regulation across –40°C to +85°C, reducing CPU voltage margining and improving energy efficiency. |
| Automotive Cabin Control Module | Industrial Process Transmitter |
Use Scenario: HVAC control unit measuring thermistor resistance using ratiometric ADC with microcontroller-supplied excitation. IC Role / Device Role / Timing Role: Stable 2.048V reference for ADC reference rail, independent of 5V system rail variation. Use Value: Delivers consistent temperature reading accuracy (<±0.3°C) across vehicle cabin temperature range without calibration rework. | Use Scenario: 4–20mA loop-powered pressure transmitter with onboard microcontroller and analog front-end. IC Role / Device Role / Timing Role: Low-current shunt reference powering sensor excitation and ADC reference from limited loop power budget. Use Value: Operates reliably down to 60μA shunt current, preserving >90% of loop power for signal conditioning and digital processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable 1.24V–18V output; 0.5% initial accuracy; higher 80μA min current; SOT23-3 | Requires external resistors for 2.048V setting; less stable at ultra-low currents | Select when adjustable reference or higher voltage capability is needed; verify layout fits SOT23 footprint |
| MAX6008AEUR+T | Fixed 2.048V; 0.1% accuracy; 75ppm/°C tempco; SOT23-3; 100μA min current | Higher accuracy and lower drift, but consumes more quiescent current and costs more | Select when system-level accuracy demands <±0.2% total error over temperature and time |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4040DIX3-2.1+T offers the smallest PCB footprint and lowest minimum operating current, making it optimal for size- and power-constrained designs where ±1% reference tolerance is acceptable.
Availability
LM4040DIX3-2.1+T is available at Aetrix Electronics and suitable for portable medical sensors, notebook power management, automotive cabin control modules, and industrial process transmitters requiring stable component supply with rapid fulfillment and consistent quality.
Supply support for LM4040DIX3-2.1+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 designs precision analog and mixed-signal ICs for industrial, automotive, communications, and consumer applications, emphasizing high performance, small size, and reliability.
The LM4040 product line delivers micropower shunt voltage references optimized for space-critical, battery-operated systems needing stable, capacitor-free reference sources across wide temperature ranges.
FAQ
What is the exact reverse breakdown voltage specification for LM4040DIX3-2.1+T at +25°C?
The LM4040DIX3-2.1+T has a nominal reverse breakdown voltage of 2.048V at +25°C, with a guaranteed tolerance of ±20mV (±1.0%). Per the datasheet Electrical Characteristics table for the D-grade 2.048V version, the min/max values are 2.028V and 2.068V respectively under standard test conditions.
Can LM4040DIX3-2.1+T operate without an external output capacitor?
Yes, the LM4040DIX3-2.1+T is explicitly designed to be stable without any external output capacitor and tolerates any capacitive load. This eliminates the need for stability-compensating components and simplifies layout in compact designs where board space is constrained.
What is the minimum shunt current required for LM4040DIX3-2.1+T to maintain regulation?
The LM4040DIX3-2.1+T requires a minimum shunt current of 60μA to maintain regulation across its specified temperature range. The D-grade variant guarantees this down to 70μA maximum at worst-case conditions, ensuring reliable startup and regulation in ultra-low-power applications.
Is Pin 3 of LM4040DIX3-2.1+T functional or should it be left unconnected?
Pin 3 of the LM4040DIX3-2.1+T is marked N.C. (No Connection) and has no internal connection. It must be left unconnected or tied directly to Pin 2 (anode). Connecting Pin 3 to any other net may compromise device performance or reliability.
What is the maximum junction temperature and thermal derating for LM4040DIX3-2.1+T in SC70-3 package?
The LM4040DIX3-2.1+T has a maximum junction temperature of +150°C. In the SC70-3 package, it features a thermal resistance θJA of 340.4°C/W on a four-layer board. Power dissipation must be limited to 235mW at +70°C ambient, derating by 2.90mW/°C above that temperature to prevent exceeding the junction limit.
LM4040DIX3-2.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- 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:
- SC-70-3
LM4040DIX3-2.1+T FAQ
1.How can I place an order for LM4040DIX3-2.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIX3-2.1+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 LM4040DIX3-2.1+T reliable?
The price and inventory of LM4040DIX3-2.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIX3-2.1+T is usually 5 days.
3.What payment methods are accepted for LM4040DIX3-2.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIX3-2.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIX3-2.1+T?
LM4040DIX3-2.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIX3-2.1+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 LM4040DIX3-2.1+T?
For technical support, including LM4040DIX3-2.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIX3-2.1+T requirements.
6.How does Aetrix verify that LM4040DIX3-2.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040DIX3-2.1+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 LM4040DIX3-2.1+T meets industry standards.
7.What is the process for return or replacement of LM4040DIX3-2.1+T?
All LM4040DIX3-2.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIX3-2.1+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 LM4040DIX3-2.1+T part is unused and in its original packaging.
Return procedure for LM4040DIX3-2.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DIX3-2.1+T Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
