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Texas Instruments LM4050CEM3X-5.0
- Part No.:
- LM4050CEM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CEM3X-5.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
LM4050CEM3X-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage with ±25 mV (±0.5%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 56 μA to 15 mA over −40°C to 125°C and requires no output capacitor-enabling use in portable battery-powered instrumentation and data acquisition systems.
For engineers reviewing the LM4050CEM3X-5.0 datasheet, LM4050CEM3X-5.0 pinout, LM4050CEM3X-5.0 application, or LM4050CEM3X-5.0 equivalent, key selection considerations include its C-grade accuracy, industrial/extended temperature support, low dynamic impedance (0.5 Ω), capacitive load tolerance, and absence of mandatory stabilization capacitance.
Technical Context
The LM4050CEM3X-5.0 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation. Its fixed 5.0 V reverse breakdown voltage is set during wafer sort via fuse and Zener-zap trimming, ensuring ±0.5% initial accuracy without post-package calibration.
It functions as a two-terminal shunt regulator: cathode accepts input current and sets reference voltage across anode-to-cathode terminals; anode connects to system ground; NC pin (Pin 3) is unconnected. Stability is maintained across 0–15 mA operating current and any capacitive load, eliminating external capacitor dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage at 100 μA test current |
| Initial Tolerance | ±25 mV (±0.5%) at 25°C - defines C-grade accuracy for cost-sensitive precision applications |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - ensures ≤±3.25 mV total drift across full range |
| Operating Current | 56–15,000 μA - supports ultra-low-power sensing and high-current reference buffering |
| Noise (10 Hz–10 kHz) | 93 μVrms - suitable for 16-bit ADC references and low-noise analog signal chains |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes load-induced voltage variation under dynamic current demand |
| Long-Term Stability | 120 ppm over 1000 hrs - predictable aging behavior for mission-critical calibration circuits |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to supply rail through series resistor; sets 5.0 V reference potential relative to anode |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the low-side reference terminal |
| NC (Pin 3) | No internal connection | Must remain floating; no PCB trace or solder connection permitted |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained designs and eliminates capacitor-related aging, ESR, and layout sensitivity |
| Tolerates capacitive loads | Stable with any value of output capacitance - simplifies filtering and bypassing in mixed-signal systems |
| Wide operating current range | 56 μA to 15 mA supports both micropower sensor nodes and high-drive reference buffers |
| Low temperature coefficient | 50 ppm/°C max ensures <±3.25 mV drift from −40°C to 125°C - critical for automotive and industrial environments |
| Low wideband noise | 93 μVrms (10 Hz–10 kHz) enables direct use with 16-bit SAR and delta-sigma ADCs without additional filtering |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter front-end with 16-bit ADC and battery operation. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.0 V reference for ADC and analog front-end. Use Value: Micropower operation (56 μA min) extends battery life; no capacitor requirement reduces BOM count and board area. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for current-to-voltage conversion and ADC reference rail. Use Value: 50 ppm/°C tempco ensures <±3.25 mV error over −40°C to 85°C ambient; C-grade meets cost-performance targets. |
| Energy Management | Precision Audio Components |
Use Scenario: Smart meter voltage monitoring channel with isolated power and long-term calibration stability. IC Role / Device Role / Timing Role: Primary shunt reference for voltage scaling and fault detection circuitry. Use Value: 120 ppm long-term stability (1000 hrs) supports 10-year metrology compliance; extended temp range (−40°C to 125°C) covers transformer cabinet environments. |
Use Scenario: High-fidelity DAC output stage requiring ultra-low-noise 5 V bias for op-amp rails. IC Role / Device Role / Timing Role: Low-noise voltage reference for analog supply regulation in audio signal path. Use Value: 93 μVrms noise avoids audible hiss; SOT-23 footprint allows placement near sensitive analog ICs with minimal trace inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C50IDBZR | Same 5.0 V, ±0.5% (C-grade), but higher 75 ppm/°C max tempco and 120 μVrms noise | Less suitable for wide-temp industrial DAQ; acceptable for cost-driven consumer instrumentation | Select when lower cost outweighs tighter tempco/noise requirements |
| REF3050AIDBZR | Series reference (not shunt); 5.0 V, ±0.2% (A-grade); requires input headroom and output capacitor | Cannot replace shunt topology directly; needs redesign of bias network and decoupling | Choose only if system already uses series references and layout permits added components |
Compared with LM4040C50IDBZR, LM4050CEM3X-5.0 offers superior thermal stability and lower noise; compared with REF3050AIDBZR, it enables simpler, capacitor-free shunt configurations but lacks series-reference advantages like programmable enable and higher PSRR.
Availability
LM4050CEM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and energy management systems requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4050CEM3X-5.0 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 decades of leadership in precision reference design and high-reliability manufacturing.
The LM4050-N family was engineered for space-constrained, micropower applications demanding high initial accuracy and low temperature drift-targeting portable test equipment, industrial sensors, and automotive subsystems where shunt topology simplifies power architecture.
FAQ
What is the minimum operating current for LM4050CEM3X-5.0?
The LM4050CEM3X-5.0 has a minimum operating current of 56 μA at 25°C, rising to 80 μA over the industrial temperature range (−40°C to 85°C) and 90 μA over the extended range (−40°C to 125°C). This defines the lowest bias current needed to maintain regulation; below this, the device exits regulation and output voltage collapses. The LM4050CEM3X-5.0 must be biased above this threshold using an appropriate series resistor.
Does LM4050CEM3X-5.0 require an output capacitor?
No, the LM4050CEM3X-5.0 does not require an output capacitor for stability. Its internal design tolerates any capacitive load-including zero capacitance-without oscillation or phase margin degradation. This eliminates capacitor-related aging, ESR effects, and PCB layout constraints, making LM4050CEM3X-5.0 ideal for ultra-compact and high-reliability applications where passive component count must be minimized.
What is the temperature coefficient specification for LM4050CEM3X-5.0?
The LM4050CEM3X-5.0 has a maximum average temperature coefficient of 50 ppm/°C over the full operating range of −40°C to 125°C. This means the worst-case voltage drift due to temperature is ±50 ppm/°C × 5.0 V = ±0.25 mV/°C, resulting in a total drift of ≤±3.25 mV across the entire temperature span. This spec is guaranteed for the C-grade variant and applies to both industrial and extended temperature versions of LM4050CEM3X-5.0.
How is the LM4050CEM3X-5.0 pinout configured in SOT-23?
The LM4050CEM3X-5.0 uses the standard DBZ SOT-23 package with three pins: Pin 1 is Cathode (shunt current input), Pin 2 is Anode (ground return), and Pin 3 is NC (no internal connection). Pin 3 must remain unconnected-no trace, pad, or solder joint. The anode must be tied directly to system ground, and the cathode connects to the supply rail via a current-setting resistor. This two-terminal shunt configuration defines the LM4050CEM3X-5.0's functional interface.
What is the wideband noise performance of LM4050CEM3X-5.0?
The LM4050CEM3X-5.0 delivers 93 μVrms wideband noise over the 10 Hz to 10 kHz frequency range, measured at 100 μA operating current. This low-noise characteristic makes LM4050CEM3X-5.0 suitable for high-resolution analog systems such as 16-bit data converters, precision sensor signal conditioning, and low-distortion audio biasing-where reference noise directly impacts effective resolution and signal fidelity.
LM4050CEM3X-5.0 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):
- 5V
- 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:
- 90 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CEM3X-5.0 FAQ
1.How can I place an order for LM4050CEM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEM3X-5.0 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 LM4050CEM3X-5.0 reliable?
The price and inventory of LM4050CEM3X-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4050CEM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEM3X-5.0?
LM4050CEM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEM3X-5.0 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 LM4050CEM3X-5.0?
For technical support, including LM4050CEM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEM3X-5.0 requirements.
6.How does Aetrix verify that LM4050CEM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4050CEM3X-5.0 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 LM4050CEM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4050CEM3X-5.0?
All LM4050CEM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEM3X-5.0, 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 LM4050CEM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4050CEM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CEM3X-5.0 Tags
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