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Texas Instruments LM4050CIM3-2.0/NOPB
- Part No.:
- LM4050CIM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,281
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Product details
Overview
LM4050CIM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.048 V reverse breakdown voltage 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 temperature range and serves as a compact, capacitor-free reference for high-resolution ADCs and portable instrumentation.
For engineers reviewing the LM4050CIM3-2.0/NOPB datasheet, LM4050CIM3-2.0/NOPB pinout, LM4050CIM3-2.0/NOPB application, or LM4050CIM3-2.0/NOPB equivalent, key selection criteria include its fixed 2.048 V output, low 41 μVrms noise (10 Hz–10 kHz), no-output-capacitor requirement, 0.3 Ω dynamic impedance at 1 mA, and compatibility with capacitive loads up to 10 nF.
Technical Context
The LM4050CIM3-2.0/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 2.048 V reference performance over wide current (60 μA–15 mA) and temperature (−40°C to 85°C) ranges. Its internal fuse-trimmed structure ensures ±0.5% initial accuracy without external calibration.
Unlike series references, it functions as a two-terminal device requiring only an external current-limiting resistor; stability is maintained without output capacitance due to low dynamic impedance (0.3 Ω typical) and inherent phase margin design, making it suitable for space-constrained, low-power systems where layout simplicity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit ADC full-scale alignment (e.g., 4096 LSB = 2.048 V → 0.5 mV/LSB) |
| Initial Tolerance | ±0.5% at 25°C (C-grade); supports cost-sensitive applications where <±0.1% is not required |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 85°C; contributes ≤±3.27 mV error across full industrial range |
| Min Operating Current | 60 μA at 25°C; allows ultra-low-power operation in battery-backed sensor nodes |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz; ensures minimal load-induced voltage shift (<0.3 mV per 1 mA load change) |
| Output Noise | 41 μVrms (10 Hz–10 kHz); preserves SNR in 16-bit data acquisition front-ends |
| Long-Term Stability | 120 ppm after 1000 hrs; guarantees <±0.25 mV drift in 10-year deployed instrumentation |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AC compliant. 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 current through external resistor; voltage referenced to Anode |
| Anode (Pin 2) | Common ground reference | Must be connected to system ground; defines 0 V reference point for cathode voltage |
| NC (Pin 3) | No internal connection | Left floating or tied to Pin 2; no electrical function; avoids unintended parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for stabilization cap; simplifies layout in dense PCBs |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance; enables direct buffering into ADC sample-and-hold inputs |
| Fixed 2.048 V output | Matches binary-scaled full-scale voltages (e.g., 211 × 1 mV); reduces scaling errors in digital multimeters |
| Low quiescent current | 60 μA min operating current enables >10-year battery life in wireless sensor transmitters |
| Industrial temperature range | −40°C to +85°C operation supports deployment in factory automation and outdoor metering |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and lithium coin-cell power supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V full-scale voltage for ADC conversion. Use Value: Enables ±0.5% absolute accuracy without trimming; 60 μA current draw extends battery life beyond 5 years. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for 24-bit delta-sigma ADC front-end. Use Value: 41 μVrms noise and 50 ppm/°C TC ensure <±0.01% measurement error across ambient temperature swings. |
| Energy Monitoring Meters | Precision Audio Level Detection |
Use Scenario: DIN-rail energy meter with isolated current/voltage sensing and metrology SoC. IC Role / Device Role / Timing Role: Primary voltage reference for RMS calculation engine and anti-aliasing filter calibration. Use Value: 120 ppm long-term stability prevents calibration drift over 10-year utility certification cycle. |
Use Scenario: Studio-grade audio analyzer detecting signal peaks with 0.1 dB resolution. IC Role / Device Role / Timing Role: Reference for logarithmic detector IC and gain-control DAC. Use Value: Fixed 2.048 V output aligns directly with 12-bit control word resolution (1 LSB = 0.5 mV), eliminating scaling firmware overhead. |
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 output (via resistors); 2% initial tolerance; higher 0.22 Ω dynamic impedance | Requires external resistors for 2.048 V setting; less accurate and noisier (120 μVrms) | Select when cost is primary constraint and ±2% tolerance is acceptable |
| REF3020AIDBZR | 2.048 V series reference; 0.2% initial tolerance; requires 1 μF output capacitor; 3.6 μA quiescent current | Three-terminal device; incompatible pinout; unsuitable for shunt-configured circuits | Select when ultra-low IQ and strict 0.2% accuracy outweigh need for shunt topology |
Compared with TL431CDBZR and REF3020AIDBZR, the LM4050CIM3-2.0/NOPB uniquely combines fixed 2.048 V output, ±0.5% tolerance, capacitor-free operation, and SOT-23 footprint-making it optimal for space-limited, low-IQ shunt reference designs where resistor-programmability or series topology are unnecessary.
Availability
LM4050CIM3-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and energy monitoring systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050CIM3-2.0/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 decades of expertise in precision reference design and high-volume manufacturing.
The LM4050-N family was engineered for space-constrained, micropower applications demanding stable voltage references without external capacitors-targeting portable test equipment, battery-powered sensors, and industrial measurement systems.
FAQ
What is the output voltage tolerance of the LM4050CIM3-2.0/NOPB at 25°C?
The LM4050CIM3-2.0/NOPB has a ±0.5% initial output voltage tolerance at 25°C (C-grade), corresponding to ±10.24 mV around the nominal 2.048 V output. This is verified per TI's SNOS455G datasheet Section 6.5, where LM4050CIM3 devices are specified with ±1024 μV (±1.024 mV) tolerance at 100 μA test current - scaled to ±0.5% of 2.048 V.
Does the LM4050CIM3-2.0/NOPB require an external output capacitor?
No, the LM4050CIM3-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC input capacitors up to 10 nF. This eliminates BOM cost and layout complexity, as confirmed in the "Features" section of the SNOS455G datasheet.
What is the minimum operating current for the LM4050CIM3-2.0/NOPB?
The LM4050CIM3-2.0/NOPB requires a minimum operating current of 60 μA at 25°C, increasing to 65 μA across the full −40°C to 85°C industrial temperature range. This value is specified in Section 6.5 (Electrical Characteristics: 2-V Option) of the SNOS455G datasheet under "IRMIN".
Can the LM4050CIM3-2.0/NOPB be used in automotive applications?
The LM4050CIM3-2.0/NOPB is rated for the 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., LM4050CIM3-2.0/Q1), which is AEC-Q100 Grade 1 qualified and rated for −40°C to +125°C. The LM4050CIM3-2.0/NOPB itself is not recommended for under-hood automotive systems.
What is the thermal hysteresis specification for the LM4050CIM3-2.0/NOPB?
The LM4050CIM3-2.0/NOPB exhibits 0.7 mV thermal hysteresis, defined as the voltage difference measured at 25°C after cycling between −40°C and +125°C. This parameter is explicitly listed in Section 6.5 of the SNOS455G datasheet under "VHYST" for the 2-V option.
LM4050CIM3-2.0/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CIM3-2.0/NOPB FAQ
1.How can I place an order for LM4050CIM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3-2.0/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 LM4050CIM3-2.0/NOPB reliable?
The price and inventory of LM4050CIM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CIM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3-2.0/NOPB?
LM4050CIM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3-2.0/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 LM4050CIM3-2.0/NOPB?
For technical support, including LM4050CIM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050CIM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3-2.0/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 LM4050CIM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CIM3-2.0/NOPB?
All LM4050CIM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3-2.0/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 LM4050CIM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050CIM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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