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Analog Devices Inc./Maxim Integrated LM4050CIX3-5.0+
- Part No.:
- LM4050CIX3-5.0+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CIX3-5.0+.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,732
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Product details
Overview
LM4050CIX3-5.0+ from Maxim Integrated is a precision 5.000V, two-terminal shunt voltage reference in SC70-3 package, featuring ±0.5% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, 60µA–15mA operating current range, and 80µVRMS wideband noise (10Hz–10kHz). It serves as a stable voltage reference in portable battery-powered instrumentation requiring high accuracy under varying load and temperature.
For engineers reviewing the LM4050CIX3-5.0+ datasheet, LM4050CIX3-5.0+ pinout, LM4050CIX3-5.0+ application, or LM4050CIX3-5.0+ equivalent, this page delivers verified specifications, validated SC70-3 terminal mapping, confirmed 5.000V reverse breakdown behavior, and real-world design implications for low-power analog signal chains and ADC/DAC reference circuits.
Technical Context
The LM4050CIX3-5.0+ uses a laser-trimmed bandgap core to maintain a fixed 5.000V reverse breakdown voltage across its anode and cathode terminals. Its internal BiCMOS architecture enables stable regulation without external capacitors while tolerating any output capacitance.
It operates as a two-terminal shunt device: reverse current (60µA–15mA) flows from cathode to anode to clamp the voltage at 5.000V; forward current up to 10mA produces ~0.7V drop. Temperature compensation ensures ≤±15ppm/°C drift over –40°C to +125°C, with long-term stability of 120ppm after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V nominal reverse breakdown voltage - defines precise reference level for ADCs, DACs, and comparators. |
| Initial Accuracy | ±0.5% (LM4050C grade) - corresponds to ±25mV tolerance at +25°C, enabling 10-bit system-level accuracy without calibration. |
| Tempco | ±15ppm/°C - guarantees ≤±1.5mV drift over full –40°C to +125°C range, critical for industrial sensor front-ends. |
| Operating Current | 60µA to 15mA shunt current - supports ultra-low-power standby (e.g., 60µA in sleep mode) and full-load regulation (e.g., 15mA for high-current buffers). |
| Output Noise | 80µVRMS (10Hz–10kHz) - limits added noise in precision measurement paths; translates to ~0.025 LSB error in 16-bit 5V ADC systems. |
| Dynamic Impedance | 0.5Ω to 1.1Ω at 1mA - ensures minimal voltage shift (<1.1mV) under 1mA load transients, preserving reference integrity during sampling. |
| Long-Term Stability | 120ppm (1000h) - equates to ±0.6mV drift over 6 weeks of continuous operation, supporting reliable field-deployed instrumentation. |
Pinout & Package
LM4050CIX3-5.0+ is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (positive terminal) | Connected to system ground or low-impedance return path; forms reference node with Pin 2. |
| Pin 2 (−) | Cathode (negative terminal) | Connected to supply rail via series resistor; reverse current flows into this pin to regulate 5.000V across Pins 1–2. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; no internal bond wire - floating or tied configuration avoids parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint - saves >50% board area vs. SOT23, ideal for space-constrained wearables and medical sensors. |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout risk associated with external stabilization caps in battery-powered designs. |
| Wide shunt current range | 60µA minimum operating current - enables micropower operation in always-on monitoring circuits without sacrificing regulation. |
| Low dynamic impedance | ≤1.1Ω at 1mA - minimizes voltage perturbation during fast load steps, essential for SAR ADC reference settling. |
| Guaranteed temp range | –40°C to +125°C operation - qualified for automotive under-hood and industrial process control environments without derating. |
Applications
| Battery-Powered Instrumentation | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 5.000V reference for ADC full-scale calibration and ratiometric sensor excitation. Use Value: ±0.5% initial accuracy and ±15ppm/°C tempco ensure <0.1% total error across temperature, eliminating field recalibration. |
Use Scenario: 4–20mA loop-powered pressure transmitter with local analog front-end. IC Role / Device Role / Timing Role: Supplies precision 5.000V reference to op-amp gain stages and ADC, referenced to loop ground. Use Value: 60µA min operating current allows operation down to 3.3V supply with 200Ω loop resistance, extending low-voltage functionality. |
| Medical Vital Sign Monitors | Automotive Cabin Control Modules |
Use Scenario: Wearable ECG patch digitizing biopotential signals with low-noise PGA and 16-bit ADC. IC Role / Device Role / Timing Role: Low-noise (80µVRMS) 5.000V reference for ADC and analog signal chain biasing. Use Value: 80µVRMS noise contributes <0.025 LSB RMS error in 5V full-scale 16-bit conversion, preserving microvolt-level signal fidelity. |
Use Scenario: HVAC control unit in vehicle cabin using thermistor-based temperature sensing and microcontroller ADC. IC Role / Device Role / Timing Role: Stable 5.000V reference for MCU's internal 12-bit ADC and analog comparator thresholds. Use Value: Guaranteed operation to +125°C ambient enables direct placement near heat-generating power components without thermal derating. |
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 (2.5V–36V) 3-terminal shunt; 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3. | Requires external resistors for 5.0V setting; higher tempco increases drift in wide-temperature deployments. | Choose when adjustable output or higher voltage capability is needed; avoid where ultra-low tempco is mandatory. |
| ADR3450ARJZ-R7 | Fixed 5.0V series reference; 0.1% initial accuracy; 10ppm/°C tempco; SOT23-5; requires input-to-output headroom. | Series topology consumes more quiescent current (100µA typical); needs ≥5.5V supply for 5.0V output. | Choose for lowest tempco and noise; only viable where supply margin exists and ground-referenced shunt topology is not required. |
Compared with TLVH431ACDBVR and ADR3450ARJZ-R7, LM4050CIX3-5.0+ uniquely combines fixed 5.000V output, SC70-3 size, 60µA min current, and ±15ppm/°C tempco-making it optimal for space- and power-constrained shunt-reference applications where precision and simplicity are prioritized over adjustability or ultra-low-noise performance.
Availability
LM4050CIX3-5.0+ is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor nodes, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050CIX3-5.0+ 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 demanding industrial, automotive, and medical applications, emphasizing high accuracy, small size, and robust operation.
The LM4050/LM4051 family was engineered specifically for space-critical, micropower shunt reference use cases-delivering guaranteed accuracy, low noise, and capacitor-free stability in subminiature SC70 packages.
FAQ
What is the exact output voltage tolerance of LM4050CIX3-5.0+ at +25°C?
The LM4050CIX3-5.0+ has a nominal 5.000V reverse breakdown voltage with ±0.5% initial accuracy at +25°C, corresponding to a guaranteed range of 4.975V to 5.025V. This C-grade specification is laser-trimmed and production-tested per Maxim's datasheet Section "ELECTRICAL CHARACTERISTICS-5.000V".
Does LM4050CIX3-5.0+ require an external capacitor for stability?
No, LM4050CIX3-5.0+ does not require an external output capacitor and remains stable with any capacitive load. Its internal design eliminates the need for stabilization components, simplifying layout and reducing BOM count-confirmed in the "Features" and "Applications Information" sections of the official datasheet.
What is the minimum operating current for LM4050CIX3-5.0+?
The LM4050CIX3-5.0+ requires a minimum shunt current of 60µA to maintain regulation, as specified in the "ELECTRICAL CHARACTERISTICS-5.000V" table. Below this threshold, reverse breakdown voltage may deviate beyond guaranteed limits, especially at temperature extremes.
Can LM4050CIX3-5.0+ be used in automotive under-hood applications?
Yes, LM4050CIX3-5.0+ is rated for operation from –40°C to +125°C and qualified for industrial and automotive cabin environments. While not AEC-Q200 certified, its guaranteed performance across this full range supports under-dash and non-engine-compartment automotive modules where junction temperature stays within +150°C absolute maximum.
What is the pin 3 configuration for LM4050CIX3-5.0+?
Pin 3 of LM4050CIX3-5.0+ is designated N.C. (no connection) and must be left floating or connected to Pin 2 (cathode) per the official datasheet Pin Description and Top View diagram. Connecting Pin 3 elsewhere may compromise regulation or reliability.
LM4050CIX3-5.0+ 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050CIX3-5.0+ FAQ
1.How can I place an order for LM4050CIX3-5.0+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIX3-5.0+ 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 LM4050CIX3-5.0+ reliable?
The price and inventory of LM4050CIX3-5.0+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIX3-5.0+ is usually 5 days.
3.What payment methods are accepted for LM4050CIX3-5.0+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIX3-5.0+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIX3-5.0+?
LM4050CIX3-5.0+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIX3-5.0+ 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 LM4050CIX3-5.0+?
For technical support, including LM4050CIX3-5.0+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIX3-5.0+ requirements.
6.How does Aetrix verify that LM4050CIX3-5.0+ is sourced from the original manufacturer or authorized distributors?
All LM4050CIX3-5.0+ 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 LM4050CIX3-5.0+ meets industry standards.
7.What is the process for return or replacement of LM4050CIX3-5.0+?
All LM4050CIX3-5.0+ units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIX3-5.0+, 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 LM4050CIX3-5.0+ part is unused and in its original packaging.
Return procedure for LM4050CIX3-5.0+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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