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Analog Devices Inc./Maxim Integrated LM4050BIM3-4.1+
- Part No.:
- LM4050BIM3-4.1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3-4.1+.pdf
- Description:
- LM4050 - Precision Micropower Sh
- Quantity:
- Payment:
- Shipping:
Inventory:3,094
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Product details
Overview
LM4050BIM3-4.1+ from Maxim Integrated is a precision 4.096V shunt voltage reference in SC70-3 package, featuring ±8.2mV initial tolerance (0.2% grade), 50ppm/°C max temperature coefficient, and stable operation from 60µA to 15mA shunt current. It delivers low 64µVRMS wideband noise (10Hz–10kHz) and supports battery-powered instrumentation requiring high accuracy over –40°C to +125°C.
For engineers reviewing the LM4050BIM3-4.1+ datasheet, LM4050BIM3-4.1+ pinout, LM4050BIM3-4.1+ application, or LM4050BIM3-4.1+ equivalent, key selection criteria include guaranteed reverse breakdown voltage accuracy across full temperature range, no-output-capacitor stability, micropower operation down to 60µA, and SC70 footprint compatibility for space-constrained PCB layouts.
Technical Context
The LM4050BIM3-4.1+ uses laser-trimmed bandgap circuitry to maintain a precise 4.096V reverse breakdown voltage with ±15ppm/°C typical tempco. Its two-terminal shunt architecture sinks variable current to regulate voltage without requiring external capacitors - stable with any capacitive load.
It operates as a passive reference node: anode (Pin 2) connects to system ground, cathode (Pin 1) to regulated rail, while Pin 3 is NC (must float or tie to Pin 2). Designed for high-voltage supply regulation, it tolerates up to 20mA reverse current and clamps to ~0.7V below ground under forward bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal reverse breakdown voltage - matches standard 12-bit DAC/ADC reference scaling (e.g., 4096 LSB = 4.096V). |
| Initial Accuracy | ±8.2mV (0.2% grade) at +25°C - ensures ≤±0.7% total error over –40°C to +125°C including tempco. |
| Tempco | 50ppm/°C max - contributes ≤±5mV drift over full temperature range, critical for precision sensor front-ends. |
| Shunt Current Range | 60µA to 15mA - enables ultra-low-power operation (e.g., 60µA × 4.096V ≈ 246µW) and robust regulation under varying loads. |
| Wideband Noise | 64µVRMS (10Hz–10kHz) - low enough for 16-bit SAR ADC references without additional filtering. |
| Dynamic Impedance | 0.5Ω to 1.0Ω at 1mA - minimizes output voltage shift under transient load changes (e.g., <1mV shift for 1mA step). |
| Long-Term Stability | 120ppm after 1000h - supports 10+ year calibration intervals in industrial monitoring systems. |
Pinout & Package
LM4050BIM3-4.1+ uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is No Connect (NC) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Regulated output node - connects to positive side of load/resistor divider; sinks shunt current to maintain 4.096V. |
| Pin 2 (−) | Anode | Reference ground terminal - must connect to system ground; defines 0V reference for output voltage. |
| Pin 3 (N.C.) | No Connection | Internally unconnected - floating or tied to Pin 2 only; incorrect connection risks parametric deviation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint - saves >50% board area vs. SOT23, ideal for wearables and portable medical sensors. |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout constraints of external stabilization caps. |
| 60µA minimum operating current | Enables micropower designs - supports coin-cell operation for >5 years in always-on IoT sensor nodes. |
| 50ppm/°C max tempco | Guaranteed over –40°C to +125°C - meets AEC-Q200 Class 1 requirements for automotive cabin sensors. |
| Low 64µVRMS noise | 10Hz–10kHz integrated noise floor - suitable for 16-bit data acquisition without post-filtering. |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 12-bit ADC and battery power management. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and internal LDO feedback. Use Value: 4.096V output directly scales 12-bit full-scale range (1 LSB = 1mV); 60µA min current extends battery life beyond 1000 hours. | Use Scenario: 4–20mA loop-powered temperature transmitter with HART modulation. IC Role / Device Role / Timing Role: Stable excitation reference for RTD bridge and ADC reference. Use Value: 50ppm/°C tempco ensures <±0.1°C measurement error over –40°C to +85°C ambient; SC70 size fits tight DIN-rail module spacing. |
| Medical Sensor Modules | Automotive Cabin Monitoring |
Use Scenario: Wearable ECG front-end with low-noise analog signal chain. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC reference. Use Value: 64µVRMS noise prevents degradation of 100dB SNR; RoHS-compliant + suffix meets IEC 60601-1 safety requirements. | Use Scenario: Occupant detection system using capacitive sensing and microcontroller ADC. IC Role / Device Role / Timing Role: Precision reference for MCU's internal 10-bit ADC measuring sensor capacitance shifts. Use Value: Guaranteed –40°C to +125°C operation supports glove-box and under-dash mounting; 0.2% initial accuracy enables single-point factory calibration. |
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 | 2.5V adjustable (via resistors), 60ppm/°C max tempco, 80µA min current, SOT23-3 | Requires external resistor network for 4.096V; higher noise (120µVRMS); larger SOT23 footprint | Select when adjustable output or higher current drive (>15mA) is needed; not drop-in for fixed 4.096V SC70 layout. |
| REF3040AIDBVR | 4.096V fixed, 50ppm/°C max tempco, 50µA min current, SC70-3, but series topology (3-terminal) | Requires input-to-output headroom (~100mV); higher quiescent current (45µA vs. 60µA shunt); different pinout | Choose for lower dropout or reduced sensitivity to source impedance; requires PCB redesign due to series architecture and pin assignment. |
Compared with TLVH431ACDBVR and REF3040AIDBVR, LM4050BIM3-4.1+ offers true two-terminal simplicity, smallest SC70 footprint, and lowest micropower threshold - making it optimal for fixed-voltage, space- and energy-constrained shunt reference roles where external components and layout changes must be avoided.
Availability
LM4050BIM3-4.1+ is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, medical sensor modules, and automotive cabin monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050BIM3-4.1+ 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 performance, reliability, and miniaturization requirements.
The LM4050 series targets space-critical, low-power applications needing stable voltage references - especially portable, battery-operated, and high-temperature industrial systems where SC70 packaging and micropower operation are essential.
FAQ
What is the exact output voltage tolerance of LM4050BIM3-4.1+ at +25°C?
The LM4050BIM3-4.1+ has a guaranteed reverse breakdown voltage of 4.096V with ±8.2mV (0.2%) initial tolerance at +25°C, per the "B" grade specification in the official Maxim datasheet. This corresponds to a range of 4.0878V to 4.1042V under nominal test conditions (IR = 100µA).
Can LM4050BIM3-4.1+ operate without an external output capacitor?
Yes, LM4050BIM3-4.1+ is internally compensated and does not require an external output capacitor for stability. It remains stable with any capacitive load - a key advantage over many series references - simplifying design and reducing BOM count in compact layouts.
What is the minimum shunt current required for LM4050BIM3-4.1+ to maintain regulation?
The LM4050BIM3-4.1+ requires a minimum shunt current of 73µA (typical) and 50µA (guaranteed) to maintain specified regulation. Below this threshold, output voltage may deviate beyond datasheet limits; design must ensure ≥73µA under all operating conditions including low-temperature and low-load scenarios.
How does the temperature coefficient affect LM4050BIM3-4.1+ accuracy over –40°C to +125°C?
With a maximum temperature coefficient of 50ppm/°C, LM4050BIM3-4.1+ contributes up to ±5mV (±0.12%) drift over the full –40°C to +125°C range relative to its +25°C value. Combined with ±8.2mV initial error, total worst-case error is ≤±0.7%, verified by Maxim's design guarantee and production testing.
Is LM4050BIM3-4.1+ RoHS-compliant and lead-free?
Yes, the "+" suffix in LM4050BIM3-4.1+ explicitly denotes RoHS-compliant, lead-free construction per Maxim's part numbering convention. This is confirmed in the Ordering Information section of the datasheet and supported by materials analysis documentation.
LM4050BIM3-4.1+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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:
- SOT-23-3
LM4050BIM3-4.1+ FAQ
1.How can I place an order for LM4050BIM3-4.1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3-4.1+ 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 LM4050BIM3-4.1+ reliable?
The price and inventory of LM4050BIM3-4.1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3-4.1+ is usually 5 days.
3.What payment methods are accepted for LM4050BIM3-4.1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3-4.1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3-4.1+?
LM4050BIM3-4.1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3-4.1+ 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 LM4050BIM3-4.1+?
For technical support, including LM4050BIM3-4.1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3-4.1+ requirements.
6.How does Aetrix verify that LM4050BIM3-4.1+ is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3-4.1+ 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 LM4050BIM3-4.1+ meets industry standards.
7.What is the process for return or replacement of LM4050BIM3-4.1+?
All LM4050BIM3-4.1+ units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3-4.1+, 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 LM4050BIM3-4.1+ part is unused and in its original packaging.
Return procedure for LM4050BIM3-4.1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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