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Texas Instruments LM4050BIM3-8.2/NOPB
- Part No.:
- LM4050BIM3-8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3-8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,910
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Product details
Overview
LM4050BIM3-8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 8.192 V reverse breakdown voltage with ±0.2% initial tolerance (B-grade), 50 ppm/°C max temperature coefficient, and 150 μVrms wideband noise (10 Hz–10 kHz). It operates from 74 μA to 15 mA supply current and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050BIM3-8.2/NOPB datasheet, LM4050BIM3-8.2/NOPB pinout, LM4050BIM3-8.2/NOPB application, or LM4050BIM3-8.2/NOPB equivalent, key selection criteria include its no-output-capacitor-required operation, capacitive-load tolerance, low dynamic impedance (0.6 Ω at 1 mA), thermal hysteresis of 2.3 mV, and AEC-Q100 Grade 1 qualification for automotive use cases where long-term stability (120 ppm after 1000 hrs) and minimal layout dependency are critical.
Technical Context
The LM4050BIM3-8.2/NOPB uses bandgap-derived Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its reverse breakdown voltage is set during wafer sort via fuse and Zener-zap trimming to ensure ±0.2% accuracy at 25°C across the B-grade population.
It functions as a two-terminal shunt regulator: cathode accepts input current and sets output voltage via reverse conduction; anode connects to system ground; pin 3 is NC. Stability is maintained without external capacitance and remains robust under capacitive loads up to 10 nF due to low dynamic impedance and optimized internal compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal reverse breakdown voltage at 150 μA test current - defines precise reference point for analog signal conditioning and data converter calibration. |
| Initial Tolerance | ±0.2% at 25°C (B-grade) - enables single-point calibration in production without trimming for mid-precision applications. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +125°C - ensures ≤±4.2 mV total drift across full range, critical for temperature-varying measurement systems. |
| Operating Current | 74 μA min to 15 mA max - supports ultra-low-power sensor nodes and high-current reference buffering without external series resistor redesign. |
| Dynamic Impedance | 0.6 Ω at 1 mA, 120 Hz - minimizes load-induced voltage variation, enabling stable reference for multiplexed ADC inputs. |
| Wideband Noise | 150 μVrms, 10 Hz–10 kHz - limits quantization uncertainty in 16-bit+ data acquisition systems requiring clean DC bias. |
| Long-Term Stability | 120 ppm after 1000 hours - reduces recalibration frequency in field-deployed test equipment and energy metering platforms. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with gull-wing leads. Pin 1 = Cathode (input/reference node), Pin 2 = Anode (ground return), Pin 3 = No Connection (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input and voltage reference node | Connects to regulated voltage rail; sinks all current not drawn by load - determines output voltage via reverse conduction characteristics. |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; establishes common return path for shunt current and defines 0 V reference for output voltage. |
| NC (Pin 3) | No internal connection | Must remain unconnected or floating; soldering to PCB pad has no electrical effect but may impact thermal performance if used as heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internal compensation eliminates need for external stabilization cap - reduces BOM count and PCB area in space-constrained designs like wearables. |
| Tolerates capacitive loads | Stable with ≥10 nF load capacitance - enables direct driving of SAR ADC sample-and-hold inputs without isolation resistors. |
| Fixed 8.192 V output | Binary-aligned voltage matches 13-bit full-scale (213 = 8192) - simplifies gain scaling in digital multimeters and programmable logic controller analog I/O modules. |
| Low quiescent current | 74 μA minimum operating current - extends battery life in portable calibrators and handheld test instruments operating >100 hrs on coin cells. |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C ambient with automotive reliability testing - supports engine control unit (ECU) sensor reference and ADAS power management subsystems. |
Applications
| Portable Data Loggers | Industrial Process Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 8.192 V excitation and ADC reference for ratiometric measurements. Use Value: Enables <1 LSB error over −25°C to +70°C operating range without recalibration, extending field deployment intervals to 2 years. |
Use Scenario: 4–20 mA loop-powered transmitter converting RTD or strain gauge signals in chemical plant monitoring. IC Role / Device Role / Timing Role: Precision reference for DAC-based current loop control and analog front-end gain setting. Use Value: Maintains 0.1% full-scale accuracy across 40°C ambient swing, eliminating thermal zero-drift compensation circuitry. |
| Automotive Cabin Sensors | Energy Meter Reference |
Use Scenario: Occupancy and air quality sensing module inside vehicle cabin with CAN bus reporting. IC Role / Device Role / Timing Role: Shunt reference for analog signal conditioning prior to MCU ADC sampling. Use Value: AEC-Q100 Grade 1 rating ensures compliance with automotive qualification requirements while supporting −40°C cold-cranking start-up. |
Use Scenario: Class 0.2 polyphase electricity meter requiring metrology-grade voltage reference for revenue-grade billing. IC Role / Device Role / Timing Role: Primary reference for 24-bit delta-sigma ADC measuring phase voltage with anti-aliasing filter. Use Value: 120 ppm long-term stability and 2.3 mV thermal hysteresis meet IEC 62053-22 accuracy retention requirements over 15-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040BIM3-8.2/NOPB | Higher 100 μA minimum operating current; 75 ppm/°C tempco; 100 μVrms noise - less stable over temperature and higher power. | Limited to lower-precision industrial controls where cost outweighs long-term drift budget. | Select when BOM cost reduction is prioritized over metrology-grade stability and low-noise performance. |
| REF5040AIDBZR | Series reference (not shunt); 4.096 V output; 3 ppm/°C tempco; 4.8 μVpp noise - superior accuracy but requires external pass transistor for >10 mA loads. | Suitable for high-precision lab equipment and calibration standards where layout complexity is acceptable. | Choose only when absolute lowest drift and noise are mandatory and system can accommodate series topology and larger footprint. |
Compared with LM4040BIM3-8.2/NOPB, the LM4050BIM3-8.2/NOPB delivers tighter initial tolerance and lower tempco at identical price point; versus REF5040AIDBZR, it offers simpler two-terminal integration and lower quiescent current but trades off ultimate precision for ease of use in embedded systems.
Availability
LM4050BIM3-8.2/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial process transmitters, and automotive cabin sensors requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050BIM3-8.2/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision analog ICs and power management solutions.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and automotive-grade systems where accuracy, stability, and layout simplicity are paramount.
FAQ
What is the minimum operating current for LM4050BIM3-8.2/NOPB at 25°C?
The LM4050BIM3-8.2/NOPB requires a minimum operating current of 74 μA at 25°C to maintain regulation within specification. This value increases slightly to 95 μA over the industrial temperature range (−40°C to +85°C) and reaches 100 μA in the extended range (−40°C to +125°C), as confirmed in Section 6.9 of the SNOS455G datasheet.
Does LM4050BIM3-8.2/NOPB require an external output capacitor?
No, the LM4050BIM3-8.2/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC sample-and-hold inputs or op-amp feedback networks - a key advantage over older shunt references like the TL431.
Is LM4050BIM3-8.2/NOPB qualified for automotive applications?
Yes, the LM4050BIM3-8.2/NOPB is part of the LM4050-N-Q1 family and is AEC-Q100 Grade 1 qualified (−40°C to +125°C), making it suitable for automotive cabin sensors, body control modules, and non-safety-critical ADAS subsystems where precision voltage referencing is needed under harsh thermal conditions.
What is the thermal hysteresis specification for LM4050BIM3-8.2/NOPB?
The LM4050BIM3-8.2/NOPB exhibits 2.3 mV thermal hysteresis over a −40°C to +125°C temperature cycle, defined as the voltage difference measured at 25°C after cycling to both extremes. This value is specified in Table 6.9 of the SNOS455G datasheet and directly impacts repeatability in field-repairable test equipment.
How does the wideband noise of LM4050BIM3-8.2/NOPB affect 16-bit ADC performance?
With 150 μVrms noise over 10 Hz–10 kHz, the LM4050BIM3-8.2/NOPB contributes ≈0.3 LSB of noise to a 16-bit ADC using an 8.192 V reference (LSB = 125 μV). This meets typical ENOB requirements for industrial data loggers and ensures effective resolution remains ≥15.5 bits without additional filtering.
LM4050BIM3-8.2/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BIM3-8.2/NOPB FAQ
1.How can I place an order for LM4050BIM3-8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3-8.2/NOPB 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 LM4050BIM3-8.2/NOPB reliable?
The price and inventory of LM4050BIM3-8.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3-8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050BIM3-8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3-8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3-8.2/NOPB?
LM4050BIM3-8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3-8.2/NOPB 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 LM4050BIM3-8.2/NOPB?
For technical support, including LM4050BIM3-8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3-8.2/NOPB requirements.
6.How does Aetrix verify that LM4050BIM3-8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3-8.2/NOPB 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 LM4050BIM3-8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050BIM3-8.2/NOPB?
All LM4050BIM3-8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3-8.2/NOPB, 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 LM4050BIM3-8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4050BIM3-8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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