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Analog Devices Inc./Maxim Integrated LM4050CIX3-4.1-T
- Part No.:
- LM4050CIX3-4.1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CIX3-4.1-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
LM4050CIX3-4.1-T from Maxim Integrated is a precision 4.096V shunt voltage reference in SC70-3 package, designed for high-accuracy analog signal conditioning and ADC/DAC biasing in space-constrained systems. It delivers ±0.5% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, and operates stably from 73µA to 15mA shunt current - enabling use in portable instrumentation and battery-powered data acquisition.
For engineers reviewing the LM4050CIX3-4.1-T datasheet, LM4050CIX3-4.1-T pinout, LM4050CIX3-4.1-T application, or LM4050CIX3-4.1-T equivalent, this page provides verified specifications, validated pin functions, real-world operating context, and confirmed alternative options for precision voltage reference selection in industrial and portable designs.
Technical Context
The LM4050CIX3-4.1-T implements a laser-trimmed bandgap core with BiCMOS process technology, delivering stable reverse breakdown at exactly 4.096V under 100µA test current. Its internal architecture eliminates need for external stabilization capacitors while maintaining stability across capacitive loads up to 1µF.
It operates as a two-terminal shunt device: cathode (Pin 2) sinks current to maintain regulated voltage between anode (Pin 1) and cathode, with Pin 3 designated N.C. and required to be floating or tied to Pin 2. Dynamic impedance remains ≤1.0Ω at 1mA, supporting low-noise operation with 64µVRMS wideband noise (10Hz–10kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; tight match to 12-bit DAC full-scale reference and standard SAR ADC VREF inputs. |
| Initial Accuracy | ±0.5% (C grade); ensures ≤20.5mV absolute error at 25°C without calibration. |
| Tempco | ±15ppm/°C max; contributes ≤±0.61mV drift over –40°C to +125°C ambient range. |
| Shunt Current Range | 73µA to 15mA; supports micropower sensor interfaces and higher-current precision regulators. |
| Dynamic Impedance | ≤1.0Ω at 1mA; maintains regulation stability during fast load transients in data converters. |
| Output Noise | 64µVRMS (10Hz–10kHz); low enough for 16-bit ADC reference without additional filtering. |
| Operating Temp Range | –40°C to +125°C; qualified for automotive under-hood and industrial control environments. |
Pinout & Package
LM4050CIX3-4.1-T uses the 3-pin SC70 package (1.8mm × 1.8mm), 50% smaller than SOT23-3, with exposed pad not electrically connected. Thermal resistance θJA = 460°C/W enables operation up to +125°C ambient with proper PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode terminal | Connected to system ground or low-impedance return path; forms reference output node with Pin 2. |
| Pin 2 (–) | Cathode terminal | Sinks shunt current; voltage at this node is regulated 4.096V above Pin 1 potential. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or tied directly to Pin 2; no internal function or bonding wire. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed bandgap core | Enables ±0.5% initial accuracy without post-package calibration or external trimming components. |
| No output capacitor required | Guaranteed stability with any capacitive load (0–1µF), simplifying layout and reducing BOM count. |
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23-3, critical for wearables and compact modules. |
| Wide shunt current range | 73µA minimum start-up current allows operation in µA-level power domains (e.g., RTC backup rails). |
| Low 64µVRMS noise | Supports 16-bit ADC performance without added low-noise LDO or RC filtering stages. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors measuring temperature, humidity, and pressure with 16-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC conversion and microcontroller VREF input. Use Value: Enables <1 LSB integral nonlinearity error over full temperature range without recalibration. |
Use Scenario: 4–20mA loop-powered field sensors in oil & gas or chemical plants requiring long-term stability. IC Role / Device Role / Timing Role: Serves as primary voltage reference for precision current-sense amplifiers and DACs driving loop current. Use Value: Delivers 120ppm long-term stability after 1000 hours, reducing field calibration frequency. |
| Medical Wearables | Automotive Body Control Modules |
Use Scenario: ECG front-end circuits in patch-style monitors where size and power efficiency are critical. IC Role / Device Role / Timing Role: Supplies reference voltage for low-noise instrumentation amplifiers and analog filters. Use Value: 64µVRMS noise floor preserves signal integrity of microvolt-level biopotential signals. |
Use Scenario: Cabin temperature and lighting control units operating in extended temperature environments. IC Role / Device Role / Timing Role: References ADCs monitoring thermistors and potentiometers in HVAC and dimmer circuits. Use Value: Guaranteed operation from –40°C to +125°C meets AEC-Q100 Grade 2 requirements for under-dash locations. |
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; requires external resistors for 4.096V setting. | Higher design flexibility but adds resistor tolerance error and board area; less suitable for ultra-low-power sleep modes due to 80µA min cathode current. | Select when programmability or higher voltage options are needed; verify resistor ratio accuracy and thermal drift impact on final VREF. |
| ADR3440ARJZ-R7 | 4.096V series reference in SOT23-5; 0.1% initial accuracy; 10ppm/°C tempco; requires 100nF output capacitor; 100µA quiescent current. | Lower noise (4.8µVRMS) and tighter tempco, but larger package and mandatory capacitor limit layout freedom in dense designs. | Prefer for ultra-high-precision metrology where noise and drift dominate; avoid if SC70 footprint or capacitor-free operation is mandatory. |
Compared with TLVH431ACDBVR and ADR3440ARJZ-R7, LM4050CIX3-4.1-T offers the smallest footprint and simplest implementation for fixed 4.096V shunt references, trading off absolute accuracy and noise for space savings and zero-component stability - ideal for cost- and size-sensitive portable and industrial systems.
Availability
LM4050CIX3-4.1-T is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050CIX3-4.1-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 (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The LM4050/LM4051 family was designed specifically for precision, low-power, space-constrained voltage reference applications - targeting portable medical devices, battery-operated sensors, and high-reliability industrial control systems.
FAQ
What is the exact output voltage tolerance of LM4050CIX3-4.1-T at +25°C?
The LM4050CIX3-4.1-T is a C-grade device with ±0.5% initial accuracy at +25°C, corresponding to a guaranteed output voltage range of 4.0755V to 4.1165V under 100µA test current. This tolerance is laser-trimmed at wafer level and does not require end-of-line calibration.
Can LM4050CIX3-4.1-T operate without an external output capacitor?
Yes, LM4050CIX3-4.1-T is explicitly designed to be stable without any external output capacitor and tolerates capacitive loads up to 1µF. This eliminates capacitor-related drift, aging, and board space - a key advantage over series references like ADR3440ARJZ-R7 that require 100nF minimum.
What is the minimum shunt current required for LM4050CIX3-4.1-T to regulate properly?
The LM4050CIX3-4.1-T requires a minimum shunt current of 73µA to maintain regulation across its full temperature range. Below this threshold, output voltage may deviate beyond specification; design must ensure RS sizing keeps ISHUNT ≥73µA even at minimum VS and maximum ILOAD.
How does the temperature coefficient of LM4050CIX3-4.1-T affect system accuracy over –40°C to +125°C?
With a guaranteed ±15ppm/°C tempco, LM4050CIX3-4.1-T contributes ≤±0.61mV total drift over the full –40°C to +125°C range relative to its 4.096V nominal output. This equates to <0.015% of full scale - sufficient for 12-bit systems without compensation.
Is Pin 3 of LM4050CIX3-4.1-T functional or optional?
Pin 3 of LM4050CIX3-4.1-T is designated N.C. (No Connection) and has no internal bond. Per datasheet, it must either be left floating or connected directly to Pin 2 (cathode); leaving it open-circuited or tying it to other nodes may cause unpredictable behavior or damage.
LM4050CIX3-4.1-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:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050CIX3-4.1-T FAQ
1.How can I place an order for LM4050CIX3-4.1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIX3-4.1-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 LM4050CIX3-4.1-T reliable?
The price and inventory of LM4050CIX3-4.1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIX3-4.1-T is usually 5 days.
3.What payment methods are accepted for LM4050CIX3-4.1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIX3-4.1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIX3-4.1-T?
LM4050CIX3-4.1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIX3-4.1-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 LM4050CIX3-4.1-T?
For technical support, including LM4050CIX3-4.1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIX3-4.1-T requirements.
6.How does Aetrix verify that LM4050CIX3-4.1-T is sourced from the original manufacturer or authorized distributors?
All LM4050CIX3-4.1-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 LM4050CIX3-4.1-T meets industry standards.
7.What is the process for return or replacement of LM4050CIX3-4.1-T?
All LM4050CIX3-4.1-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIX3-4.1-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 LM4050CIX3-4.1-T part is unused and in its original packaging.
Return procedure for LM4050CIX3-4.1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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