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Analog Devices Inc./Maxim Integrated LM4040DIX3-3.0
- Part No.:
- LM4040DIX3-3.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040DIX3-3.0.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,264
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Product details
Overview
LM4040DIX3-3.0 from Maxim Integrated is a precision 3.000V two-terminal shunt voltage reference in SC70-3 package, featuring ±1.0% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +85°C, 60µA–15mA operating current range, and 45µVRMS wideband noise (10Hz–10kHz). It delivers stable regulation in portable battery-powered instrumentation and low-power analog front-ends.
For engineers reviewing the LM4040DIX3-3.0 datasheet, LM4040DIX3-3.0 pinout, LM4040DIX3-3.0 application, or LM4040DIX3-3.0 equivalent, this page provides verified electrical parameters, validated SC70-3 terminal mapping, confirmed shunt reference behavior, and real-world design constraints for space-constrained, micropower systems requiring stable 3.0V reference voltage without output capacitance.
Technical Context
The LM4040DIX3-3.0 implements a bandgap-based shunt reference architecture with laser-trimmed resistors for factory calibration. Its internal BiCMOS process enables stable reverse breakdown at exactly 3.000V (±30mV) under 100µA test current, with guaranteed operation across –40°C to +85°C ambient.
It functions as a two-terminal device: cathode (Pin 1) and anode (Pin 2), with Pin 3 designated N.C. and required to be floating or tied to Pin 2. No external capacitor is needed-stability is maintained across any capacitive load due to low dynamic impedance (≤1.1Ω at 1mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±30mV at TA = +25°C; maintains regulation across full 60µA–15mA shunt current range. |
| Initial Accuracy | ±1.0% (Grade D); corresponds to ±30mV tolerance at 3.0V, enabling direct use in 12-bit ADC reference paths without trimming. |
| Tempco | ±15ppm/°C max over –40°C to +85°C; contributes ≤±0.99mV drift across full temperature range. |
| Operating Current | 60µA minimum to 15mA maximum; supports ultra-low-power sleep modes and high-current precision DAC references. |
| Dynamic Impedance | ≤1.1Ω at 1mA, 120Hz; ensures <1mV output variation under 1mA load transients. |
| Wideband Noise | 45µVRMS (10Hz–10kHz); suitable for 16-bit SAR ADCs where reference noise must stay below 50µVRMS. |
| Long-Term Stability | 120ppm after 1000 hours; translates to ±0.36mV drift over 1k-hour burn-in, critical for metrology-grade instruments. |
Pinout & Package
LM4040DIX3-3.0 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm × 0.9mm), 50% smaller than SOT23-3. Pin 3 is unconnected and must remain floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Connected to regulated voltage node; sinks shunt current to maintain 3.000V across load. |
| Pin 2 (−) | Anode | Ground or low-impedance return path; completes shunt current loop. |
| Pin 3 (N.C.) | No Connection | Must be left floating or shorted to Pin 2; no internal connection-violating this risks parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB space vs. SOT23-3, enabling dense portable PCB layouts. |
| No output capacitor required | Stable with any capacitive load (0–∞), eliminating BOM cost and layout risk of external COUT. |
| Low 45µVRMS noise | Enables high-resolution data acquisition without post-filtering; meets noise floor requirements for 16-bit systems. |
| 60µA min operating current | Supports micropower designs drawing <100µA system current, such as coin-cell IoT sensors. |
| Guaranteed 3.000V output | Fixed reverse breakdown voltage eliminates need for external resistor dividers or trimming networks. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor with 14-bit ADC sampling analog sensor output. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.000V reference for ADC VREF input. Use Value: ±30mV initial tolerance and ±0.99mV tempco ensure <0.02% full-scale error across operating temperature, meeting ISO 15197 clinical accuracy requirements. |
Use Scenario: Environmental sensor node logging temperature/humidity every 5 minutes on CR2032 battery. IC Role / Device Role / Timing Role: Micropower shunt reference powering precision op-amp signal conditioning and ADC reference. Use Value: 60µA minimum operating current enables >5-year battery life while maintaining 3.000V reference stability during wake-up bursts. |
| Industrial Process Transmitters | USB-Powered Test Equipment |
Use Scenario: 4–20mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: Primary voltage reference for DAC generating precise 4–20mA current setpoint. Use Value: Low dynamic impedance (≤1.1Ω) prevents DAC output droop during HART AC coupling, preserving loop integrity. |
Use Scenario: Portable oscilloscope probe with integrated 12-bit ADC and USB 2.0 interface. IC Role / Device Role / Timing Role: Stable 3.000V reference for ADC and analog front-end gain stages. Use Value: 45µVRMS noise and no-output-capacitor operation eliminate EMI coupling paths from USB bus noise into analog signal chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | 3.0V, ±0.5% initial accuracy, ±50ppm/°C tempco, SOT23-3 package, 75µA–15mA operating range. | Higher accuracy grade but looser tempco; requires external capacitor for stability with >1nF loads. | Select when tighter initial tolerance (±15mV) is prioritized over temperature stability or capacitor-free operation. |
| ADR3430ARJZ-R7 | 3.0V, ±0.1% initial accuracy, ±10ppm/°C tempco, SOT23-5 package, 100µA–10mA operating range, 3.5µVRMS noise. | Series reference (not shunt); requires minimum 100µA supply current and external bypass capacitor. | Select when ultra-low noise (<4µVRMS) and superior tempco are mandatory, and board space allows SOT23-5 and bias network. |
Compared with TL4050C30IDBZR and ADR3430ARJZ-R7, LM4040DIX3-3.0 offers unique capacitor-free stability and SC70-3 size, trading initial accuracy for micropower flexibility and layout simplicity in shunt-configured systems.
Availability
LM4040DIX3-3.0 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial process transmitters, and USB-powered test equipment requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4040DIX3-3.0 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, medical, and communications applications, emphasizing low-power, high-accuracy performance in miniature packages.
LM4040DIX3-3.0 belongs to the LM4040 family of micropower shunt voltage references, engineered specifically for space-constrained, battery-operated systems needing stable, capacitor-free 2.048V–5.000V references without external components.
FAQ
What is the absolute maximum shunt current rating for LM4040DIX3-3.0?
The absolute maximum reverse current (cathode-to-anode) for LM4040DIX3-3.0 is 20mA. Exceeding this value risks permanent damage. The recommended operating range remains 60µA to 15mA, where regulation performance-including voltage accuracy, tempco, and noise-is fully specified and guaranteed across –40°C to +85°C.
Can LM4040DIX3-3.0 be used with a 10µF output capacitor?
Yes, LM4040DIX3-3.0 tolerates any capacitive load, including 10µF, without oscillation or instability. Unlike many shunt references, it requires no output capacitor for stability-its internal design ensures phase margin is maintained regardless of load capacitance, simplifying layout and reducing BOM count.
What does the 'D' grade signify in LM4040DIX3-3.0?
The 'D' in LM4040DIX3-3.0 denotes the 1.0% initial accuracy grade, meaning its reverse breakdown voltage is guaranteed between 2.970V and 3.030V at +25°C. This grade also specifies ±150ppm/°C temperature coefficient (vs. ±100ppm/°C for A/B/C grades), resulting in wider total tolerance over temperature but lower cost and sufficient precision for many industrial and consumer applications.
Is Pin 3 of LM4040DIX3-3.0 internally connected?
No, Pin 3 of LM4040DIX3-3.0 is explicitly designated N.C. (No Connection) and has no internal bond wire or circuit connection. The datasheet mandates that Pin 3 must be left floating or tied to Pin 2 (anode); connecting it to any other net may cause unpredictable shifts in output voltage or long-term reliability issues.
How does LM4040DIX3-3.0 compare to LM4040CIX3-3.0 in terms of long-term stability?
Both LM4040DIX3-3.0 and LM4040CIX3-3.0 specify identical long-term stability: 120ppm after 1000 hours of operation. The difference lies in initial accuracy (±1.0% vs. ±0.5%) and temperature coefficient (±150ppm/°C vs. ±100ppm/°C), not aging performance-making LM4040DIX3-3.0 a cost-optimized choice where long-term drift is equally critical but tighter initial spec is unnecessary.
LM4040DIX3-3.0 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- 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
LM4040DIX3-3.0 FAQ
1.How can I place an order for LM4040DIX3-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIX3-3.0 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 LM4040DIX3-3.0 reliable?
The price and inventory of LM4040DIX3-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIX3-3.0 is usually 5 days.
3.What payment methods are accepted for LM4040DIX3-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIX3-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIX3-3.0?
LM4040DIX3-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIX3-3.0 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 LM4040DIX3-3.0?
For technical support, including LM4040DIX3-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIX3-3.0 requirements.
6.How does Aetrix verify that LM4040DIX3-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4040DIX3-3.0 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 LM4040DIX3-3.0 meets industry standards.
7.What is the process for return or replacement of LM4040DIX3-3.0?
All LM4040DIX3-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIX3-3.0, 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 LM4040DIX3-3.0 part is unused and in its original packaging.
Return procedure for LM4040DIX3-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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