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Analog Devices Inc./Maxim Integrated LM4050BIM3-5.0+T
- Part No.:
- LM4050BIM3-5.0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3-5.0+T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:35,000
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Product details
Overview
LM4050BIM3-5.0+T from Maxim Integrated is a precision 5.000V shunt voltage reference in SC70-3 package, delivering ±0.2% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, and stable regulation across 60µA–15mA shunt current. It serves as a compact, low-noise (80µVRMS) reference for ADC/DAC biasing, portable power monitoring, and battery-fueled instrumentation.
For engineers reviewing the LM4050BIM3-5.0+T datasheet, LM4050BIM3-5.0+T pinout, LM4050BIM3-5.0+T application, or LM4050BIM3-5.0+T equivalent, this page delivers verified electrical specs, validated SC70-3 terminal mapping, real-world load-transient behavior, and two confirmed alternative references with documented grade and noise differences.
Technical Context
The LM4050BIM3-5.0+T uses laser-trimmed bandgap circuitry to maintain a fixed 5.000V reverse breakdown voltage without external capacitors. Its BiCMOS process enables low dynamic impedance (0.5–1.1Ω) and wide operating current range while tolerating any capacitive load.
It operates as a two-terminal shunt device: cathode (Pin 1) and anode (Pin 2) form the reference path, while Pin 3 is unconnected or tied to Pin 2. Performance is guaranteed across –40°C to +125°C with long-term stability of 120ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V nominal at +25°C; ±10mV tolerance over full temperature range for B-grade |
| Initial Accuracy | ±0.2% (LM4050B grade), enabling high-resolution 12-bit+ data conversion without calibration |
| Tempco | ±15ppm/°C max; ensures ≤±0.7% total error from –40°C to +125°C |
| Shunt Current Range | 60µA to 15mA; supports micropower sensor nodes and higher-current analog front-ends |
| Output Noise | 80µVRMS (10Hz–10kHz); suitable for precision 16-bit SAR ADC reference inputs |
| Dynamic Impedance | 0.5–1.1Ω at 1mA; maintains voltage stability under fast load transients |
| Long-Term Stability | 120ppm after 1000h; reduces recalibration frequency in field-deployed equipment |
Pinout & Package
LM4050BIM3-5.0+T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left floating or connected to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Reference output node; connects to regulated voltage rail or ADC REF+ input |
| Pin 2 (−) | Anode | Ground return path; forms shunt current loop with external series resistor |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; no internal function |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves PCB space in portable and wearable designs |
| No output capacitor required | Eliminates BOM cost and layout complexity while ensuring stability with any capacitive load |
| Wide shunt current range | 60µA–15mA operation enables use from ultra-low-power IoT sensors to industrial signal chains |
| Low wideband noise | 80µVRMS (10Hz–10kHz) minimizes quantization error in high-resolution data acquisition |
| Guaranteed -40°C to +125°C operation | Validated performance across automotive under-hood and industrial control environments |
Applications
| Portable Medical Sensors | Battery Management Systems |
|---|---|
Use Scenario: Continuous glucose monitor with 16-bit ADC sampling analog sensor output. IC Role / Device Role / Timing Role: Provides stable 5.000V reference for ADC VREF, rejecting supply ripple and thermal drift. Use Value: Enables ±0.2% absolute accuracy in glucose concentration reporting without factory recalibration. |
Use Scenario: Cell voltage monitoring in 4S Li-ion packs for e-bikes and power tools. IC Role / Device Role / Timing Role: Supplies precise 5.000V reference to multiplexed voltage dividers feeding microcontroller ADC. Use Value: Supports <±10mV cell voltage resolution across full temperature range, critical for state-of-charge estimation. |
| Industrial Process Transmitters | Test & Measurement Equipment |
Use Scenario: 4–20mA loop-powered pressure transmitter with HART digital overlay. IC Role / Device Role / Timing Role: Shunt reference for DAC output stage and analog sensor excitation circuitry. Use Value: Maintains 5.000V accuracy despite ambient shifts from –40°C to +85°C, meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: Benchtop multimeter reference subsystem requiring low-noise DC voltage source. IC Role / Device Role / Timing Role: Primary shunt reference for autoranging voltage measurement front-end. Use Value: 80µVRMS noise and ±15ppm/°C tempco enable 6½-digit DCV accuracy without ovenized references. |
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), ±0.5% initial accuracy, 90µVRMS noise, SOT23-3 | Requires external resistors for 5V setup; higher noise limits 16-bit ADC use | Choose when design flexibility outweighs need for fixed 5V and lowest noise |
| ADR3450ARJZ-R7 | 5.000V fixed, ±0.1% initial accuracy, 45µVRMS noise, SOT23-5 (with enable) | Includes shutdown pin; larger package; lower noise but higher cost | Choose when highest accuracy and lowest noise are mandatory, and enable functionality is needed |
Compared with LM4050BIM3-5.0+T, TLVH431ACDBVR trades fixed-voltage convenience and noise performance for configurability, while ADR3450ARJZ-R7 improves accuracy and noise at the cost of pin count, size, and price-making LM4050BIM3-5.0+T optimal for space-constrained, cost-sensitive 5V reference needs.
Availability
LM4050BIM3-5.0+T is available at Aetrix Electronics and suitable for portable medical sensors, battery management systems, and industrial process transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050BIM3-5.0+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) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and medical applications.
The LM4050 series targets space-critical, micropower systems needing stable voltage references without external compensation-optimized for battery-powered instrumentation and high-reliability sensing.
FAQ
What is the guaranteed operating temperature range for LM4050BIM3-5.0+T?
The LM4050BIM3-5.0+T is fully specified and tested over –40°C to +125°C. All key parameters-including output voltage, tempco, and dynamic impedance-are guaranteed across this range per the datasheet's Electrical Characteristics tables. This makes LM4050BIM3-5.0+T suitable for under-hood automotive and industrial control applications where ambient extremes are common.
Does LM4050BIM3-5.0+T require an external output capacitor for stability?
No, LM4050BIM3-5.0+T does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or large bypass caps. This eliminates capacitor-related drift, aging, and board space-confirmed by test data showing stable transient response up to 15mA load steps without oscillation.
What is the minimum shunt current needed for LM4050BIM3-5.0+T to regulate properly?
The LM4050BIM3-5.0+T requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, output voltage deviates significantly from 5.000V. The datasheet specifies IRMIN = 60µA (typical) and confirms stable operation down to 45µA under worst-case conditions-critical for designing low-quiescent-current sensor nodes powered by coin cells.
How does the noise performance of LM4050BIM3-5.0+T impact high-resolution ADC applications?
LM4050BIM3-5.0+T delivers 80µVRMS wideband noise (10Hz–10kHz), directly limiting effective resolution in ADC systems. For a 5V full-scale 16-bit ADC (LSB = 76.3µV), this noise contributes ~1.05 LSB RMS, preserving usable resolution. Lower-noise alternatives like ADR3450 (45µVRMS) may be preferred for 18-bit+ systems, but LM4050BIM3-5.0+T remains optimal for cost-sensitive 16-bit designs.
Can Pin 3 of LM4050BIM3-5.0+T be left unconnected or must it be tied to Pin 2?
Pin 3 of LM4050BIM3-5.0+T is designated N.C. (No Connection) and may be left floating or connected to Pin 2 (anode). The datasheet explicitly states "PIN 3 MUST BE LEFT FLOATING OR CONNECTED TO PIN 2"-no internal circuitry connects to Pin 3, so either configuration is electrically identical and safe for LM4050BIM3-5.0+T operation.
LM4050BIM3-5.0+T 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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BIM3-5.0+T FAQ
1.How can I place an order for LM4050BIM3-5.0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3-5.0+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 LM4050BIM3-5.0+T reliable?
The price and inventory of LM4050BIM3-5.0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3-5.0+T is usually 5 days.
3.What payment methods are accepted for LM4050BIM3-5.0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3-5.0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3-5.0+T?
LM4050BIM3-5.0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3-5.0+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 LM4050BIM3-5.0+T?
For technical support, including LM4050BIM3-5.0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3-5.0+T requirements.
6.How does Aetrix verify that LM4050BIM3-5.0+T is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3-5.0+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 LM4050BIM3-5.0+T meets industry standards.
7.What is the process for return or replacement of LM4050BIM3-5.0+T?
All LM4050BIM3-5.0+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3-5.0+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 LM4050BIM3-5.0+T part is unused and in its original packaging.
Return procedure for LM4050BIM3-5.0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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