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Analog Devices Inc./Maxim Integrated LM4040DIX3-4.1-T
- Part No.:
- LM4040DIX3-4.1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040DIX3-4.1-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
LM4040DIX3-4.1-T from Maxim Integrated is a precision 4.096V 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 portable battery-powered systems where space and low quiescent current are critical.
For engineers reviewing the LM4040DIX3-4.1-T datasheet, LM4040DIX3-4.1-T pinout, LM4040DIX3-4.1-T application, or LM4040DIX3-4.1-T equivalent, key selection criteria include reverse breakdown voltage tolerance over temperature, dynamic impedance at 1mA, wideband noise (64µVRMS), minimum operating current (78µA), and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4040DIX3-4.1-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 optimized for fixed 4.096V regulation across wide current (60μA–15mA) and temperature (–40°C to +85°C) ranges.
No external capacitor is required for stability, and it tolerates arbitrary capacitive loads. The device exhibits low dynamic impedance (≤1.3Ω at 1mA, 120Hz) and 64µVRMS wideband noise (10Hz–10kHz), making it suitable for high-resolution ADC/DAC reference and low-noise analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Breakdown Voltage | 4.096V nominal at +25°C; min/max = 4.055V/4.137V (D-grade, 1.0% initial accuracy) |
| Initial Accuracy | ±1.0% (±41mV) at +25°C - defines absolute voltage error before temperature drift |
| Temp Coefficient | ±150ppm/°C max (IR = 1mA); contributes ≤±9.75mV error over –40°C to +85°C span |
| Operating Current Range | 60μA to 15mA - supports micropower sensor nodes and higher-current reference buffering |
| Dynamic Impedance | ≤1.3Ω at 1mA, 120Hz - ensures minimal voltage shift under load transients |
| Wideband Noise | 64µVRMS (10Hz–10kHz) - enables use in 12–14-bit data converters without added filtering |
| Package | SC70-3 (1.8mm × 1.8mm) - 50% smaller than SOT23, ideal for ultra-compact PCB layouts |
Pinout & Package
LM4040DIX3-4.1-T uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), with pin 3 designated as no-connect (N.C.) and requiring either open-circuit or connection to pin 2 per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (cathode) | Connected to regulated voltage node; sinks shunt current to maintain VR |
| 2 (–) | Negative terminal (anode) | Reference ground return path; must be tied to system ground |
| 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2 - floating violates specification |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23 equivalents |
| No output capacitor required | Stable with any capacitive load - eliminates BOM item and layout constraints |
| Guaranteed -40°C to +85°C operation | Validated performance across industrial ambient range without derating |
| Low 64µVRMS noise (10Hz–10kHz) | Supports 12-bit ADCs without additional filtering; reduces system SNR degradation |
| 1.0% initial accuracy grade | Balances cost and precision for non-critical reference applications (e.g., battery gauging) |
Applications
| Portable Battery-Powered Equipment | Notebook Computers |
|---|---|
Use Scenario: Reference for fuel-gauge ICs and battery voltage monitoring circuits in handheld devices. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096V基准 for ADC conversion of cell voltage. Use Value: Enables accurate state-of-charge estimation within ±1% full-scale error despite varying load and temperature. | Use Scenario: Precision reference for system power rail monitors and thermal sensor ADCs in thin-and-light platforms. IC Role / Device Role / Timing Role: Two-terminal shunt reference sourcing stable 4.096V to multi-channel SAR ADCs. Use Value: Maintains <1 LSB error in 12-bit conversions across –10°C to +70°C ambient with no external capacitor. |
| Cell Phones | Industrial Process Controls |
Use Scenario: Reference for RF front-end power detector calibration and PMIC feedback loops. IC Role / Device Role / Timing Role: Low-noise shunt reference supplying 4.096V to envelope-tracking DACs and RSSI measurement paths. Use Value: 64µVRMS noise ensures <0.025% full-scale error in 10-bit RSSI digitization under RF interference. | Use Scenario: Voltage reference for 4–20mA transmitter loop-powered sensors in factory automation. IC Role / Device Role / Timing Role: Micropower shunt reference operating from 3.3V or 5V supply with 60μA minimum current. Use Value: Supports loop-powered designs with <100μA quiescent draw while maintaining ±0.5% total voltage error over temperature. |
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 reference; 0.5% initial accuracy; 3-pin SOT23; requires external resistor divider | Not pin-compatible; requires design change to set 4.096V; higher minimum cathode current (80μA) | Select when adjustable output or tighter initial accuracy is needed; verify divider tolerance impact on final voltage |
| MAX6008AEUR+T | Fixed 4.096V; 0.2% initial accuracy; SC70-3; ±50ppm/°C tempco; 100μA–20mA range | Higher precision and lower drift, but 3× cost; same package and pinout | Choose for metrology-grade references where 0.2% accuracy and ±50ppm/°C stability justify premium |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4040DIX3-4.1-T offers lowest cost and smallest footprint for 4.096V reference needs where ±1% accuracy and ±150ppm/°C drift are acceptable - ideal for cost-sensitive, space-constrained consumer electronics.
Availability
LM4040DIX3-4.1-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 RoHS-compliant packaging and tape-and-reel delivery.
Supply support for LM4040DIX3-4.1-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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and communication applications.
The LM4040 product line delivers precision micropower shunt voltage references targeting space-constrained, battery-operated systems needing stable, low-drift, capacitor-free reference sources.
FAQ
What is the guaranteed operating temperature range for LM4040DIX3-4.1-T?
The LM4040DIX3-4.1-T is specified for operation from –40°C to +85°C. This is the I-grade temperature range, confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet. It is not rated for the extended –40°C to +125°C (E-grade) range.
Does LM4040DIX3-4.1-T require an external output capacitor for stability?
No, the LM4040DIX3-4.1-T does not require an external output capacitor. The datasheet explicitly states it is stable with any capacitive load and does not need an external capacitor for frequency stability - a key advantage over many series references.
What is the minimum operating current for LM4040DIX3-4.1-T at room temperature?
The minimum operating current for LM4040DIX3-4.1-T is 78µA at +25°C, as specified in the Electrical Characteristics table for the 4.096V version under "Minimum Operating Current (IRMIN)" for D-grade devices.
How is pin 3 used on LM4040DIX3-4.1-T?
Pin 3 of the LM4040DIX3-4.1-T is labeled N.C. (No Connection) and must either be left unconnected or connected directly to pin 2 (anode). The datasheet warns that leaving pin 3 floating violates specifications and may affect performance or reliability.
What is the wideband noise specification for LM4040DIX3-4.1-T?
The LM4040DIX3-4.1-T has a wideband noise of 64µVRMS measured from 10Hz to 10kHz at 100µA operating current, as documented in the Electrical Characteristics table for the 4.096V variant - higher than lower-voltage versions due to increased bandgap-related noise.
LM4040DIX3-4.1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040DIX3-4.1-T FAQ
1.How can I place an order for LM4040DIX3-4.1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIX3-4.1-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 LM4040DIX3-4.1-T reliable?
The price and inventory of LM4040DIX3-4.1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIX3-4.1-T is usually 5 days.
3.What payment methods are accepted for LM4040DIX3-4.1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIX3-4.1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIX3-4.1-T?
LM4040DIX3-4.1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIX3-4.1-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 LM4040DIX3-4.1-T?
For technical support, including LM4040DIX3-4.1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIX3-4.1-T requirements.
6.How does Aetrix verify that LM4040DIX3-4.1-T is sourced from the original manufacturer or authorized distributors?
All LM4040DIX3-4.1-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 LM4040DIX3-4.1-T meets industry standards.
7.What is the process for return or replacement of LM4040DIX3-4.1-T?
All LM4040DIX3-4.1-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIX3-4.1-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 LM4040DIX3-4.1-T part is unused and in its original packaging.
Return procedure for LM4040DIX3-4.1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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