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Texas Instruments LM4050BIM3X-2.0/NOPB
- Part No.:
- LM4050BIM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,741
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Product details
Overview
LM4050BIM3X-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V nominal output with ±0.2% initial tolerance (B-grade), 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA reverse current and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges. Used in high-accuracy ADC/DAC biasing and portable instrumentation.
For engineers reviewing the LM4050BIM3X-2.0/NOPB datasheet, LM4050BIM3X-2.0/NOPB pinout, LM4050BIM3X-2.0/NOPB application, or LM4050BIM3X-2.0/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and noise performance, and two rigorously cross-referenced alternative parts for design-in flexibility.
Technical Context
The LM4050BIM3X-2.0/NOPB employs bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains below 0.3 Ω at 1 mA, enabling stable regulation across capacitive loads without external compensation.
It achieves ±0.2% initial accuracy at 25°C and maintains ≤±11.4688 mV total tolerance over −40°C to +125°C via fused trim and low-TC design. Long-term stability is rated at 120 ppm after 1000 hours at 25°C with 100 μA bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal - precise binary-aligned reference ideal for 12-bit ADCs and DACs requiring exact 2.048 V full-scale scaling. |
| Initial Tolerance | ±0.2% at 25°C (B-grade) - guarantees worst-case deviation of ±4.1 mV before temperature or aging effects. |
| Temp Coefficient | ≤50 ppm/°C max - contributes ≤±6.5 mV error over −40°C to +125°C ambient, critical for unheated field instruments. |
| Operating Current | 60 μA min to 15 mA max - enables ultra-low-power sensor nodes (e.g., battery-powered RTD transmitters) and high-current analog front-ends. |
| Output Noise | 41 μVrms (10 Hz–10 kHz) - supports 16-bit+ resolution in precision data acquisition without additional filtering. |
| Dynamic Impedance | 0.3 Ω typical at 1 mA - ensures <1 mV load regulation shift per 1 mA current change, simplifying current-source design. |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C, 100 μA) - predicts <0.012% drift over first year in sealed industrial enclosures. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not present. Thermal resistance RθJA = 287°C/W (board mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage rail; sinks all load + reference current; sets output voltage via external series resistor. |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines 0 V reference point for cathode voltage; no internal connection to substrate. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no electrical function; may be omitted in PCB layout or tied to ground for mechanical stability only. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 10 μF - eliminates BOM cost and board space for bypass caps in space-constrained wearables. |
| Fixed 2.048 V output | Binary-aligned voltage matches common 12-bit full-scale range (212 = 4096 → 2.048 V = 4096 × 0.5 mV) - removes scaling math in firmware and reduces calibration steps. |
| Micropower operation | 60 μA minimum operating current - enables >10-year battery life in coin-cell-powered IoT sensors using 220 mAh CR2032 cells. |
| Low thermal hysteresis | 0.7 mV max (−40°C ↔ +125°C cycle) - ensures repeatable voltage after thermal cycling in automotive under-hood modules. |
| AEC-Q100 qualified variant available | LM4050BIM3X-2.0/NOPB itself is industrial-grade; Q1 variant (LM4050BIM3X-2.0Q1) meets Grade 1 automotive requirements - allows direct migration to automotive designs. |
Applications
| Portable Medical Sensors | Data Acquisition Front-Ends |
|---|---|
Use Scenario: Battery-powered ECG patch measuring microvolt-level cardiac signals with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for ADC full-scale, directly biased by ultra-low-quiescent LDO. Use Value: 41 μVrms noise avoids post-acquisition digital filtering; 60 μA min current enables 7-year operation on 300 mAh Li-SOCl₂ cell. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA loop signals across 8 channels. IC Role / Device Role / Timing Role: Precision shunt reference for multiplexed 24-bit delta-sigma ADC, shared across all channels via low-drift buffer. Use Value: ±0.2% initial tolerance and 50 ppm/°C TC ensure <0.05% total error over 0–60°C cabinet range without per-channel calibration. |
| Precision Thermocouple Conditioners | Automotive Cabin Air Quality Monitors |
Use Scenario: Cold-junction compensation circuit using RTD and 24-bit ADC in HVAC control unit. IC Role / Device Role / Timing Role: Reference for RTD excitation current source and ADC reference, rejecting supply ripple via shunt topology. Use Value: 0.3 Ω dynamic impedance minimizes current-source compliance error; 120 ppm long-term stability reduces annual recalibration need. |
Use Scenario: CO₂ and VOC sensor module in automotive infotainment head unit, operating from 12 V battery with wide ambient swings. IC Role / Device Role / Timing Role: Stable 2.048 V reference for gas sensor signal conditioning and ADC, surviving −40°C cold crank and +125°C dashboard exposure. Use Value: Extended −40°C to +125°C rating and 0.7 mV thermal hysteresis ensure consistent readings after repeated cabin temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, ±0.2% initial tolerance, 50 ppm/°C TC, but 50 μA min current and 25 μVrms noise - lower noise but requires ≥50 μA, limiting ultra-low-IQ use cases. | Preferred in noise-sensitive audio ADCs; less suitable for sub-60 μA energy harvesting systems. | Select REF3020AIDBZR when wideband noise must be <30 μVrms; retain LM4050BIM3X-2.0/NOPB for designs needing guaranteed 60 μA operation. |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% (A-grade), 30 ppm/°C TC, 45 μVrms noise, but SOT-23-5 package with enable pin - adds control flexibility but increases footprint and BOM count. | Used where power sequencing or standby mode is required; incompatible with 3-pin-only layouts. | Choose ADR3420ARJZ-R7 for systems needing shutdown capability; LM4050BIM3X-2.0/NOPB remains optimal for fixed-on, minimal-footprint deployments. |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, the LM4050BIM3X-2.0/NOPB uniquely combines 3-pin SOT-23 simplicity, guaranteed 60 μA operation, and binary-aligned 2.048 V output - making it the most space- and current-efficient choice for high-volume portable instrumentation and industrial sensor nodes.
Availability
LM4050BIM3X-2.0/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, precision thermocouple conditioners, and automotive cabin air quality monitors requiring stable component supply across multi-year production cycles.
Supply support for LM4050BIM3X-2.0/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 precision reference design heritage and ISO/TS 16949-certified manufacturing.
The LM4050-N family was engineered for space-constrained, battery-operated instrumentation demanding micropower operation, zero-output-capacitor stability, and binary-aligned reference voltages - targeting portable test equipment, sensor transmitters, and industrial PLC analog I/O.
FAQ
What is the minimum operating current for LM4050BIM3X-2.0/NOPB?
The LM4050BIM3X-2.0/NOPB requires a minimum reverse current of 60 μA at 25°C to maintain regulation within specification. This value increases to 65 μA across the full industrial temperature range (−40°C to +85°C) and 73 μA in the extended range (−40°C to +125°C), as confirmed in Section 6.5 of the SNOS455G datasheet. Operating below this threshold risks output voltage collapse or increased TC error.
Does LM4050BIM3X-2.0/NOPB require an external capacitor for stability?
No, the LM4050BIM3X-2.0/NOPB does not require an external output capacitor. Its internal design tolerates any capacitive load - including 0 μF to 10 μF - without oscillation or phase margin degradation. This is explicitly stated in the Features section and validated in Figure 15 (Load Transient Response) of the SNOS455G datasheet, eliminating capacitor BOM cost and PCB area in compact designs.
What is the thermal hysteresis specification for LM4050BIM3X-2.0/NOPB?
The LM4050BIM3X-2.0/NOPB exhibits a maximum thermal hysteresis of 0.7 mV, defined as the voltage difference measured at 25°C after cycling between −40°C and +125°C. This value is specified in Table 6.5 (Electrical Characteristics: 2-V Option) of the SNOS455G datasheet and reflects repeatability after extreme thermal stress - critical for automotive and outdoor instrumentation where ambient swings occur repeatedly.
Is LM4050BIM3X-2.0/NOPB qualified for automotive applications?
The LM4050BIM3X-2.0/NOPB is an industrial-grade part. However, its automotive-qualified counterpart - the LM4050BIM3X-2.0Q1 - is AEC-Q100 Grade 1 certified (−40°C to +125°C) and manufactured on TI's automotive flow. While LM4050BIM3X-2.0/NOPB shares identical electrical specs, only the Q1 variant is approved for safety-critical automotive subsystems per the manufacturer's product folder documentation.
How does the output voltage tolerance of LM4050BIM3X-2.0/NOPB change over temperature?
At 25°C, LM4050BIM3X-2.0/NOPB has ±0.2% initial tolerance (±4.1 mV). Over −40°C to +125°C, total tolerance expands to ±11.4688 mV (±0.56%) due to temperature coefficient (max 50 ppm/°C) and curvature effects. This is calculated per datasheet footnote (3) in Section 6.5 and verified in the "Reverse Breakdown Voltage Tolerance" row of Table 6.5 for the 2-V option.
LM4050BIM3X-2.0/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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 34µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BIM3X-2.0/NOPB FAQ
1.How can I place an order for LM4050BIM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3X-2.0/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 LM4050BIM3X-2.0/NOPB reliable?
The price and inventory of LM4050BIM3X-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3X-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050BIM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3X-2.0/NOPB?
LM4050BIM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3X-2.0/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 LM4050BIM3X-2.0/NOPB?
For technical support, including LM4050BIM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050BIM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3X-2.0/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 LM4050BIM3X-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050BIM3X-2.0/NOPB?
All LM4050BIM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3X-2.0/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 LM4050BIM3X-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050BIM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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