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Texas Instruments LM4050CEM3-4.1/NOPB
- Part No.:
- LM4050CEM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CEM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,928
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Product details
Overview
LM4050CEM3-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a nominal 4.096 V reverse breakdown voltage with ±21 mV (C-grade) tolerance over −40°C to 85°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 73 μA to 15 mA, enabling use in low-power data acquisition and portable instrumentation.
For engineers reviewing the LM4050CEM3-4.1/NOPB datasheet, LM4050CEM3-4.1/NOPB pinout, LM4050CEM3-4.1/NOPB application, or LM4050CEM3-4.1/NOPB equivalent, key selection criteria include its C-grade initial tolerance, industrial temperature range, no-output-capacitor-required stability, and compatibility with capacitive loads in space-constrained analog front-ends.
Technical Context
The LM4050CEM3-4.1/NOPB uses bandgap-based Zener-zap trimmed shunt regulation with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤0.5 Ω at 1 mA, ensuring stable reference voltage under varying load currents from 73 μA to 15 mA.
It achieves ±21 mV total output voltage tolerance across −40°C to 85°C (industrial range), combining ±4.1 mV initial accuracy (C-grade) and ±50 ppm/°C max tempco over 125°C ΔT. Thermal hysteresis is specified at 1.148 mV after cycling between −40°C and 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - sets precise bias point for ADCs, DACs, and comparators. |
| Initial Tolerance (25°C) | ±21 mV (C-grade) - defines worst-case deviation before temperature or aging effects. |
| Tempco (−40°C to 85°C) | ≤50 ppm/°C - contributes ≤±26.6 mV drift over full industrial range, critical for measurement repeatability. |
| Min Operating Current | 73 μA - enables operation in ultra-low-power systems such as battery-backed sensors. |
| Dynamic Impedance | 0.5 Ω at 1 mA - ensures minimal output voltage shift during transient load changes. |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - limits added uncertainty in high-resolution (≥16-bit) data conversion. |
| Long-Term Stability | 120 ppm (1000 hrs) - supports calibration integrity in field-deployed test equipment. |
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 references input voltage; Pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current path & voltage reference node | Connects to regulated voltage rail; sinks all current not drawn by load - determines output accuracy via IR drop across external resistor. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; forms return path for shunt current - any impedance here directly degrades regulation. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no routing or soldering required - avoids unintended parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation without external bypass - eliminates BOM cost and board area for decoupling in compact designs. |
| Tolerates capacitive loads | Unconditional stability with any load capacitance - simplifies interface to ADC sample-and-hold or op-amp buffers. |
| Fixed 4.096 V output | Binary-aligned voltage ideal for 12-bit and 16-bit systems - matches common full-scale ranges (e.g., 0–4.096 V = 4096 LSB). |
| Low 73 μA minimum current | Enables use with high-value anode resistors (>50 kΩ at 5 V supply) - extends battery life in portable meters and IoT nodes. |
| 50 ppm/°C max tempco | Guaranteed drift performance across −40°C to 85°C - meets Class I instrumentation requirements per IEC 61000-4-30. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V full-scale reference to ADC and signal-conditioning op-amps. Use Value: Enables <1 LSB error over −25°C to 70°C operating range using C-grade tolerance and 50 ppm/°C tempco - eliminates need for on-board calibration. |
Use Scenario: 4–20 mA loop-powered transmitter converting RTD or strain-gauge signals in factory automation. IC Role / Device Role / Timing Role: Precision voltage reference for excitation and ADC reference in isolated analog front-end. Use Value: Maintains ±0.1% system accuracy over 85°C ambient range while consuming <100 μA quiescent current - preserves loop power budget. |
| Energy Metering IC Reference | Calibration Equipment |
|
Use Scenario: Polyphase electricity meter using metrology AFE (e.g., TI MSP430i2041) with integrated 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary reference for ADC and internal DAC used in gain/offset correction. Use Value: 93 μVrms noise and 120 ppm long-term stability ensure Class 0.2 meter compliance without periodic recalibration. |
Use Scenario: Benchtop multimeter or source-measure unit requiring traceable DC voltage reference subsystem. IC Role / Device Role / Timing Role: Stable, low-drift shunt reference in self-calibrating reference divider chain. Use Value: Thermal hysteresis of 1.148 mV and ±21 mV total tolerance support <5 ppm repeatability in automated calibration sequences. |
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 | 2.5 V adjustable reference (requires two external resistors); 200 mV min cathode-anode voltage; 0.22 Ω dynamic impedance. | Requires external feedback network; unsuitable for fixed 4.096 V systems without trimming; higher minimum operating current (1 mA). | Select when design flexibility for multiple output voltages is needed and board space allows resistor placement. |
| REF3040AIDBZR | 4.096 V series reference; 50 ppm/°C tempco; 48 μVrms noise; requires 1.5 μF output capacitor; 50 μA quiescent current. | Series architecture isolates load from supply; but adds dropout voltage (130 mV) and capacitor dependency - incompatible with low-voltage or capacitor-free layouts. | Select when supply rejection >80 dB is required and ≥4.2 V supply is available for headroom. |
Compared with TL431CDBZR and REF3040AIDBZR, LM4050CEM3-4.1/NOPB uniquely delivers fixed 4.096 V with zero external components, sub-100 μA start-up, and guaranteed stability into capacitive loads - making it optimal for space- and power-constrained 4.096 V reference nodes.
Availability
LM4050CEM3-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and energy metering systems requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4050CEM3-4.1/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs since 1951.
The LM4050-N series was designed for high-accuracy, low-power shunt reference applications in space-constrained systems - targeting portable test equipment, industrial process control, and automotive subsystems where stability, size, and micropower operation are critical.
FAQ
What is the output voltage tolerance of LM4050CEM3-4.1/NOPB over temperature?
The LM4050CEM3-4.1/NOPB has a total output voltage tolerance of ±21 mV over the industrial temperature range (−40°C to 85°C), combining its ±4.1 mV initial C-grade accuracy at 25°C and ±50 ppm/°C max temperature coefficient. This is verified per Section 6.7 of the SNOS455G datasheet and applies to the exact LM4050CEM3-4.1/NOPB part number.
Does LM4050CEM3-4.1/NOPB require an external output capacitor?
No, LM4050CEM3-4.1/NOPB does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or op-amp inputs - a key advantage confirmed in the "No Output Capacitor Required" feature and functional description of the LM4050-N datasheet.
What is the minimum operating current for LM4050CEM3-4.1/NOPB?
The LM4050CEM3-4.1/NOPB requires a minimum operating current of 73 μA over the industrial temperature range (−40°C to 85°C), as specified in Section 6.7 "Electrical Characteristics: 4.1-V Option" of the SNOS455G datasheet. At 25°C, the typical minimum is 52 μA, but 73 μA must be guaranteed for full-range operation.
Is LM4050CEM3-4.1/NOPB compatible with capacitive loads?
Yes, LM4050CEM3-4.1/NOPB is explicitly characterized to tolerate capacitive loads without oscillation or instability. The datasheet states "Tolerates Capacitive Loads" as a core feature and confirms stability across all load capacitances - essential for driving SAR ADC sample capacitors or op-amp inputs directly.
What is the wideband noise specification for LM4050CEM3-4.1/NOPB?
The LM4050CEM3-4.1/NOPB exhibits 93 μVrms wideband noise over the 10 Hz to 10 kHz bandwidth, as measured at 100 μA operating current (Section 6.7, SNOS455G). This value directly impacts effective resolution in high-precision data acquisition systems using this reference.
LM4050CEM3-4.1/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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CEM3-4.1/NOPB FAQ
1.How can I place an order for LM4050CEM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEM3-4.1/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 LM4050CEM3-4.1/NOPB reliable?
The price and inventory of LM4050CEM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CEM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEM3-4.1/NOPB?
LM4050CEM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEM3-4.1/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 LM4050CEM3-4.1/NOPB?
For technical support, including LM4050CEM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050CEM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CEM3-4.1/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 LM4050CEM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CEM3-4.1/NOPB?
All LM4050CEM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEM3-4.1/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 LM4050CEM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050CEM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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