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Texas Instruments LM4050AEM3X-5.0
- Part No.:
- LM4050AEM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3X-5.0.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,247
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Product details
Overview
LM4050AEM3X-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V nominal reverse breakdown voltage with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 41 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-ideal for space-constrained battery-powered instrumentation.
For engineers reviewing the LM4050AEM3X-5.0 datasheet, LM4050AEM3X-5.0 pinout, LM4050AEM3X-5.0 application, or LM4050AEM3X-5.0 equivalent, key selection criteria include its A-grade accuracy at 25°C, low dynamic impedance (0.5 Ω), thermal hysteresis of 1.4 mV, and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4050AEM3X-5.0 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 5.0 V reference across industrial and extended temperature ranges. Its design eliminates need for output capacitance while maintaining stability under all capacitive load conditions.
It features fuse-trimmed reverse breakdown voltage during wafer sort, achieving ±0.1% initial accuracy (A grade) at 25°C. Dynamic impedance remains ≤0.5 Ω at 1 mA, and long-term stability is rated at 120 ppm over 1000 hours at 25°C with 100 μA bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and unadjustable |
| Initial Tolerance | ±0.1% at 25°C (A grade), enabling high-accuracy ADC/DAC biasing without calibration |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +125°C, ensuring <±11 mV drift across full range |
| Operating Current | 56 μA min to 15 mA max-supports ultra-low-power sensor nodes and high-current precision DACs |
| Noise (10 Hz–10 kHz) | 41 μVrms typical-critical for high-resolution data acquisition systems |
| Dynamic Impedance | 0.5 Ω at 1 mA-minimizes load-induced voltage variation in feedback loops |
| Thermal Hysteresis | 1.4 mV over −40°C ↔ +125°C cycling-ensures repeatable reference stability after thermal stress |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178 compatible. Pin 1 = Cathode (shunt current path), Pin 2 = Anode (ground reference), Pin 3 = NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sensing node | Connects to regulated supply rail; sinks all current not drawn by load-defines reference point |
| Anode (Pin 2) | Common ground reference | Must be connected to system ground; forms return path for cathode current and sets 0 V reference |
| NC (Pin 3) | No internal connection | Must remain unconnected; floating or tied to ground per layout best practice-no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 100 nF-reduces BOM count and board area |
| Fixed 5.0 V breakdown | Precisely trimmed during wafer sort-eliminates external resistor networks and adjustment complexity |
| A-grade accuracy | ±0.1% initial tolerance at 25°C-meets requirements for Class I metrology and medical-grade analog front-ends |
| Wide operating current range | 56 μA to 15 mA-supports both nanoamp sensor biasing and 12-bit DAC reference buffering |
| Low thermal hysteresis | 1.4 mV over −40°C ↔ +125°C cycle-ensures consistent performance after environmental stress testing |
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 5.0 V for ADC reference input and op-amp bias rails. Use Value: Enables ±0.01% measurement accuracy over temperature with no warm-up delay or capacitor dependency. |
Use Scenario: Industrial PLC analog input module sampling 8 channels at 100 kSPS. IC Role / Device Role / Timing Role: Precision reference for multiplexed 24-bit delta-sigma ADC and signal conditioning amplifiers. Use Value: Delivers 41 μVrms noise floor and <±11 mV total drift-preserves ENOB > 21 bits across operating range. |
| Energy Management Units | Precision Audio Components |
Use Scenario: Smart meter with isolated current/voltage sensing and metrology SoC. IC Role / Device Role / Timing Role: Primary reference for polyphase energy measurement ASIC requiring traceable calibration. Use Value: A-grade tolerance and 120 ppm long-term stability support ANSI C12.20 Class 0.2 compliance over 10-year field life. |
Use Scenario: High-fidelity DAC-based headphone amplifier with discrete output stage. IC Role / Device Role / Timing Role: Low-noise voltage reference for DAC internal bias and analog output buffer offset control. Use Value: 41 μVrms noise and 0.5 Ω dynamic impedance prevent audible hum and preserve THD+N < −110 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3050AIDBZR | Series reference (not shunt); requires minimum 50 μA load current; 50 ppm/°C tempco; 45 μVrms noise | Needs external pass transistor for high-current loads; incompatible with floating-ground topologies | Choose when system ground is fixed and load current exceeds 15 mA-requires redesign of bias network |
| ADR3450ARJZ-R7 | Series reference; 5.0 V output; ±0.1% initial accuracy; 10 μVp-p (0.1–10 Hz); 50 ppm/°C tempco | Higher cost; requires ≥100 μA supply current; not suitable for reverse-biased configurations | Prefer for ultra-low-noise (<1 μVp-p) precision applications where series topology is acceptable |
Compared with REF3050AIDBZR and ADR3450ARJZ-R7, the LM4050AEM3X-5.0 uniquely supports shunt configuration with zero minimum load, enables floating reference designs, and delivers identical accuracy with lower noise in the 10 Hz–10 kHz band critical for data converters.
Availability
LM4050AEM3X-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 continuity.
Supply support for LM4050AEM3X-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in precision reference design.
The LM4050-N family was engineered for space-constrained, low-power, high-accuracy applications-including battery-powered test equipment, industrial sensors, and automotive subsystems-where shunt topology, capacitor-free stability, and A-grade tolerance are essential.
FAQ
What is the minimum operating current for LM4050AEM3X-5.0?
The LM4050AEM3X-5.0 requires a minimum operating current of 56 μA at 25°C and up to 90 μA across the extended temperature range (−40°C to +125°C). This ensures stable 5.0 V regulation and meets A-grade accuracy specifications. Below this threshold, the device may not maintain specified tolerance or dynamic impedance.
Does LM4050AEM3X-5.0 require an external output capacitor?
No-LM4050AEM3X-5.0 is designed to operate stably without any output capacitor, even with capacitive loads up to 100 nF. Its internal architecture eliminates phase-margin concerns common in shunt references, simplifying layout and reducing bill-of-materials cost.
What is the thermal hysteresis specification for LM4050AEM3X-5.0?
The LM4050AEM3X-5.0 exhibits 1.4 mV thermal hysteresis over a −40°C to +125°C temperature cycle, measured as the voltage difference at 25°C before and after extreme-temperature exposure. This value is confirmed in the Electrical Characteristics table for the 5-V option under "VHYST" parameter.
Is LM4050AEM3X-5.0 qualified for automotive applications?
No-LM4050AEM3X-5.0 is the industrial-grade variant (LM4050-N). For automotive use, TI offers the LM4050-Q1 series (e.g., LM4050QAIM3X-5.0), which is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow. The -Q1 version shares identical electrical specs but adds qualification testing and traceability.
What is the reverse dynamic impedance of LM4050AEM3X-5.0?
The LM4050AEM3X-5.0 has a reverse dynamic impedance of 0.5 Ω maximum at 1 mA test current and 120 Hz frequency, per Section 6.8 of the datasheet. This low impedance ensures minimal voltage shift under varying load currents-critical for high-resolution ADC reference stability.
LM4050AEM3X-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:
- ±0.1%
- 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
LM4050AEM3X-5.0 FAQ
1.How can I place an order for LM4050AEM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3X-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 LM4050AEM3X-5.0 reliable?
The price and inventory of LM4050AEM3X-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 LM4050AEM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4050AEM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3X-5.0?
LM4050AEM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3X-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 LM4050AEM3X-5.0?
For technical support, including LM4050AEM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3X-5.0 requirements.
6.How does Aetrix verify that LM4050AEM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3X-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 LM4050AEM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4050AEM3X-5.0?
All LM4050AEM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3X-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 LM4050AEM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4050AEM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AEM3X-5.0 Tags
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