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Texas Instruments LM4050CIM3X-2.0/NOPB
- Part No.:
- LM4050CIM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,434
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Product details
Overview
LM4050CIM3X-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V ±0.5% (C-grade) at 25°C with 50 ppm/°C max temperature coefficient, 60 μA minimum operating current, and 41 μVrms wideband noise (10 Hz–10 kHz). It serves as a stable reference for ADCs, DACs, and sensor signal conditioning in portable instrumentation.
For engineers reviewing the LM4050CIM3X-2.0/NOPB datasheet, LM4050CIM3X-2.0/NOPB pinout, LM4050CIM3X-2.0/NOPB application, or LM4050CIM3X-2.0/NOPB equivalent, key selection criteria include its C-grade tolerance, industrial temperature range (−40°C to +85°C), no-output-capacitor operation, capacitive load tolerance, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4050CIM3X-2.0/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 2.048 V reverse breakdown across −40°C to +85°C. Its dynamic impedance is 0.3 Ω at 1 mA, supporting low-noise regulation under varying load currents from 60 μA to 15 mA.
Unlike series references, it operates as a two-terminal device requiring only an external current-setting resistor; stability is maintained without output capacitance and with any capacitive load up to 10 nF. The NC pin (Pin 3) must remain floating or tied to Anode (Pin 2), confirming strict functional isolation of the third terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; fixed value optimized for 12-bit systems (211 = 2048 mV) |
| Initial Tolerance | ±0.5% at 25°C (C-grade); enables cost-sensitive precision without calibration |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +85°C; ensures ≤±3.3 mV total drift across full range |
| Min Operating Current | 60 μA at 25°C; supports ultra-low-power battery operation (e.g., coin-cell sensors) |
| Output Noise | 41 μVrms (10 Hz–10 kHz); suitable for 16-bit SAR ADC reference without filtering |
| Dynamic Impedance | 0.3 Ω at 1 mA; maintains <±2.3 mV load regulation from 1 mA to 15 mA |
| Long-Term Stability | 120 ppm (1000 hrs); predictable aging behavior for field-deployed measurement systems |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, 1.3 mm height; RoHS-compliant, lead-free (NOPB suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to supply rail via current-setting resistor; output voltage appears between Cathode and Anode |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; defines 0 V reference point for regulated 2.048 V |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2; no electrical function - not a trim or enable pin |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Guaranteed stability with zero external capacitance - eliminates BOM line item and layout area |
| Tolerates capacitive loads | Stable with ≥10 nF load capacitance - supports direct buffering into ADC sample capacitors |
| Micropower operation | 60 μA min current enables >10-year battery life in 10 μA-sleep IoT nodes |
| Low thermal hysteresis | 0.7 mV max after −40°C ↔ +125°C cycling - critical for repeatable lab-grade measurements |
| Fuse/Zener-zap trimming | Wafer-sort accuracy better than ±0.5% - eliminates post-package calibration cost |
Applications
| Portable Instrumentation | Data Acquisition Front-End |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V for ADC full-scale range and sensor excitation. Use Value: Enables true 16-bit resolution without gain/offset calibration due to ≤±3.3 mV total temp drift and 41 μVrms noise. |
Use Scenario: Industrial 4–20 mA transmitter with isolated analog front-end. IC Role / Device Role / Timing Role: Precision reference for current-loop DAC and RTD bridge excitation. Use Value: Maintains <0.1% total error over −40°C to +85°C using C-grade tolerance and 50 ppm/°C TC. |
| Energy Monitoring Sensors | Precision Audio Biasing |
Use Scenario: Smart electricity meter with metrology-grade current/voltage sensing. IC Role / Device Role / Timing Role: Reference for anti-aliasing filter op-amps and ADC reference input. Use Value: 120 ppm long-term stability ensures <0.01% annual calibration drift in revenue-grade meters. |
Use Scenario: High-fidelity audio ADC/DAC module requiring ultra-low-noise bias rails. IC Role / Device Role / Timing Role: Low-noise voltage reference for op-amp VREF and PGA gain-setting networks. Use Value: 41 μVrms noise avoids audible hiss in 24-bit audio paths; SOT-23 fits dense analog routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBVR | Adjustable 2.5 V reference (2.495 V ±1%), higher 1 mA min current, 0.22 Ω impedance | Requires two external resistors for 2.048 V setting; less accurate out-of-box | Select when adjustable output or higher current drive is needed; not drop-in for fixed 2.048 V |
| MAX6002EUR+T | Fixed 2.048 V, ±0.2% A-grade, 35 ppm/°C TC, SOT-23-3, but 75 μA min current | Better initial accuracy and TC, but higher quiescent current limits battery life | Select for highest accuracy in non-battery apps; LM4050CIM3X-2.0/NOPB preferred for <60 μA systems |
Compared with TL431CDBVR and MAX6002EUR+T, the LM4050CIM3X-2.0/NOPB uniquely balances C-grade cost, 2.048 V exactness, sub-60 μA operation, and zero-capacitor stability - making it optimal for uncalibrated, space- and power-constrained measurement nodes.
Availability
LM4050CIM3X-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 sourcing.
Supply support for LM4050CIM3X-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 leadership in precision reference design.
The LM4050-N family was engineered for high-accuracy, low-power shunt referencing in space-constrained systems - targeting portable test equipment, sensor transmitters, and battery-operated measurement devices.
FAQ
What is the output voltage tolerance of LM4050CIM3X-2.0/NOPB at 25°C?
The LM4050CIM3X-2.0/NOPB has a C-grade initial tolerance of ±0.5% at 25°C, 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 specify ±1024 µV (±1.024 mV) at 100 µA test current - scaled to ±0.5% of 2.048 V. The LM4050CIM3X-2.0/NOPB matches this specification exactly.
Does LM4050CIM3X-2.0/NOPB require an external output capacitor?
No, the LM4050CIM3X-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability with zero capacitance and tolerates any capacitive load up to 10 nF, as confirmed in the "Features" section and Section 9.1 of the SNOS455G datasheet. This eliminates layout constraints and reduces BOM count versus traditional shunt references.
What is the minimum operating current for LM4050CIM3X-2.0/NOPB?
The LM4050CIM3X-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 Table 6.5 (Electrical Characteristics: 2-V Option) of the SNOS455G datasheet and enables ultra-low-power operation in battery-powered sensor nodes.
Is Pin 3 of LM4050CIM3X-2.0/NOPB functional or unused?
Pin 3 of the LM4050CIM3X-2.0/NOPB is labeled NC (No Connection) and has no internal connection. Per Section 5 ("Pin Configuration and Functions") of the SNOS455G datasheet, it must be left floating or tied to Pin 2 (Anode); it is not a trim, enable, or feedback pin - misconnecting it risks violating absolute maximum ratings.
What temperature range is supported by LM4050CIM3X-2.0/NOPB?
The LM4050CIM3X-2.0/NOPB is rated for the industrial temperature range of −40°C to +85°C, as stated in Section 6.3 ("Recommended Operating Conditions") and confirmed in Device Information tables. It is not qualified for the extended −40°C to +125°C range - that applies only to LM4050-N-Q1 automotive variants, not the standard LM4050-N series including LM4050CIM3X-2.0/NOPB.
LM4050CIM3X-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:
- ±0.5%
- 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
LM4050CIM3X-2.0/NOPB FAQ
1.How can I place an order for LM4050CIM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3X-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 LM4050CIM3X-2.0/NOPB reliable?
The price and inventory of LM4050CIM3X-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 LM4050CIM3X-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CIM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3X-2.0/NOPB?
LM4050CIM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3X-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 LM4050CIM3X-2.0/NOPB?
For technical support, including LM4050CIM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050CIM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3X-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 LM4050CIM3X-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CIM3X-2.0/NOPB?
All LM4050CIM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3X-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 LM4050CIM3X-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050CIM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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