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Texas Instruments LM4050CEM3-2.0/NOPB
- Part No.:
- LM4050CEM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CEM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,389
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Product details
Overview
LM4050CEM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V nominal output with ±0.5% initial tolerance (C-grade), 50 ppm/°C max temperature coefficient, and 60 μA minimum operating current. It operates across −40°C to 85°C industrial range and supports stable regulation without external capacitor, serving as a compact, low-noise reference for ADCs and sensor signal chains.
For engineers reviewing the LM4050CEM3-2.0/NOPB datasheet, LM4050CEM3-2.0/NOPB pinout, LM4050CEM3-2.0/NOPB application, or LM4050CEM3-2.0/NOPB equivalent, key selection criteria include its fixed 2.048 V reverse breakdown voltage, C-grade accuracy, SOT-23 thermal performance (RθJA = 287°C/W), and compatibility with capacitive loads up to 15 mA.
Technical Context
The LM4050CEM3-2.0/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤0.3 Ω at 1 mA, enabling high PSRR and low noise (41 μVrms, 10 Hz–10 kHz) under varying load currents from 60 μA to 15 mA.
It achieves ±0.5% initial accuracy via wafer-level fuse trimming and maintains long-term stability of 120 ppm over 1000 hours. Thermal hysteresis is limited to 0.7 mV after cycling between −40°C and 125°C, supporting repeatable precision in cyclic thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - sets precise bias point for analog front-ends and DAC references. |
| Initial Tolerance | ±0.5% at 25°C (C-grade) - enables cost-sensitive designs where <±0.1% is not required. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 85°C - ensures <±1.05 mV total drift across full industrial range. |
| Min Operating Current | 60 μA - allows ultra-low-power operation in battery-backed systems and energy-harvesting nodes. |
| Dynamic Impedance | 0.3 Ω at 1 mA - minimizes load-induced voltage shift and improves regulation under fast transient loads. |
| Output Noise | 41 μVrms (10 Hz–10 kHz) - supports 16-bit+ data acquisition without added filtering. |
| Long-Term Stability | 120 ppm over 1000 hrs - reduces calibration frequency in test equipment and instrumentation. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178AC compliant. Anode (Pin 2) connects to system ground; Cathode (Pin 1) carries shunt current and defines regulated node; Pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / reference output node | Connects to regulated voltage node; sinks all excess current to maintain 2.048 V at this terminal. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the reference potential for reverse breakdown operation. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or component connection required. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 15 mA - eliminates BOM cost and layout area for stabilization caps. |
| Tolerates capacitive loads | Guaranteed stability with >100 nF load capacitance - simplifies interface to ADC input buffers and op-amp drivers. |
| Fixed 2.048 V output | Matches common 12-bit full-scale binary (212 = 4096 → 2.048 V = 4096 × 0.5 mV) - ideal for direct interfacing with 12-bit SAR ADCs. |
| Low quiescent current | 60 μA min operating current - extends battery life in portable multimeters and handheld sensors. |
| Industrial temp range | −40°C to +85°C operation - qualified for factory automation, PLC I/O modules, and outdoor metering. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 2.048 V reference for 12-bit ADC scaling. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise full-scale input range. Use Value: Enables ±0.5% measurement accuracy across battery discharge cycle without recalibration. |
Use Scenario: Industrial DAQ module digitizing 4–20 mA sensor outputs with 16-bit resolution. IC Role / Device Role / Timing Role: Low-noise reference for successive-approximation ADC reference input. Use Value: 41 μVrms noise contributes <0.025 LSB error in 16-bit system, preserving effective resolution. |
| Process Control Sensors | Precision Audio Biasing |
Use Scenario: Temperature transmitter with RTD bridge and instrumentation amplifier. IC Role / Device Role / Timing Role: Stable excitation reference for ratiometric bridge sensing. Use Value: 50 ppm/°C drift limits gain error to <±0.33% over −40°C to 85°C ambient range. |
Use Scenario: Class-A headphone amplifier requiring ultra-low-drift DC bias for op-amp inputs. IC Role / Device Role / Timing Role: Low-noise, low-drift DC offset generator for rail-to-rail input stages. Use Value: 0.7 mV thermal hysteresis prevents audible "pops" during power-up/down thermal 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 |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.495 V output (requires two resistors); 2% initial tolerance; 50 ppm/°C typical TC | Requires external feedback network; higher minimum cathode current (1 mA) | Select when adjustable output or higher current capability (>100 mA) is needed; not drop-in for fixed 2.048 V use. |
| REF3020AIDBZR | 2.048 V series reference; 0.2% initial tolerance; 50 ppm/°C max TC; 50 μA quiescent current | Series topology requires input voltage ≥2.048 V + dropout; no anode-ground constraint | Choose for lower noise (28 μVrms) and tighter tolerance; requires higher supply headroom than shunt configuration. |
Compared with TL431CDBZR and REF3020AIDBZR, the LM4050CEM3-2.0/NOPB offers true fixed 2.048 V output with zero external components, minimal board space (SOT-23), and guaranteed stability into capacitive loads - making it optimal for space-constrained, low-power shunt reference applications where absolute output voltage is critical.
Availability
LM4050CEM3-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and process control systems requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4050CEM3-2.0/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, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs and voltage references.
The LM4050-N product line was designed for space-constrained, micropower applications demanding high initial accuracy and low temperature drift - targeting portable test equipment, sensor interfaces, and industrial signal conditioning.
FAQ
What is the exact output voltage specification for LM4050CEM3-2.0/NOPB?
The LM4050CEM3-2.0/NOPB has a nominal reverse breakdown voltage of 2.048 V, with ±0.5% initial tolerance at 25°C (C-grade). Over the industrial temperature range (−40°C to +85°C), total tolerance is ±14.7456 mV, derived from ±0.5% plus 50 ppm/°C drift across 65°C ΔT. This value is verified per TI's SNOS455G datasheet Section 6.5.
Does LM4050CEM3-2.0/NOPB require an external capacitor for stability?
No - the LM4050CEM3-2.0/NOPB is explicitly designed to operate stably without any output capacitor, even with capacitive loads up to 15 mA. Its internal architecture eliminates phase-margin concerns associated with traditional shunt references, as confirmed in the "No Output Capacitor Required" feature and Figure 15 (stability vs. capacitance) of the SNOS455G datasheet.
What is the minimum operating current for LM4050CEM3-2.0/NOPB?
The LM4050CEM3-2.0/NOPB requires a minimum operating current of 60 μA at 25°C and 65 μA across the full −40°C to +85°C industrial temperature range. This is specified in Section 6.5 (Electrical Characteristics: 2-V Option) of the SNOS455G datasheet under "IRMIN" parameter.
Can LM4050CEM3-2.0/NOPB be used in automotive applications?
The LM4050CEM3-2.0/NOPB is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, TI offers the LM4050-N-Q1 variant (e.g., LM4050QCEM3-2.0/NOPB), which is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on an automotive-grade flow - the standard LM4050CEM3-2.0/NOPB is not recommended for safety-critical automotive systems.
What is the thermal resistance (RθJA) of LM4050CEM3-2.0/NOPB in SOT-23 package?
The LM4050CEM3-2.0/NOPB in DBZ (SOT-23) package has a junction-to-ambient thermal resistance (RθJA) of 287°C/W, as specified in Section 6.4 (Thermal Information) of the SNOS455G datasheet. This value assumes standard JEDEC 2-layer board mounting conditions and is critical for calculating maximum power dissipation at elevated ambient temperatures.
LM4050CEM3-2.0/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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CEM3-2.0/NOPB FAQ
1.How can I place an order for LM4050CEM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEM3-2.0/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 LM4050CEM3-2.0/NOPB reliable?
The price and inventory of LM4050CEM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CEM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEM3-2.0/NOPB?
LM4050CEM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEM3-2.0/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 LM4050CEM3-2.0/NOPB?
For technical support, including LM4050CEM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050CEM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CEM3-2.0/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 LM4050CEM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CEM3-2.0/NOPB?
All LM4050CEM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEM3-2.0/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 LM4050CEM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050CEM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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