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Texas Instruments LM4050AIM3X-5.0
- Part No.:
- LM4050AIM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3X-5.0.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,747
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Product details
Overview
LM4050AIM3X-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 ±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 supply current and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC biasing and portable instrumentation.
For engineers reviewing the LM4050AIM3X-5.0 datasheet, LM4050AIM3X-5.0 pinout, LM4050AIM3X-5.0 application, or LM4050AIM3X-5.0 equivalent, key selection criteria include output voltage stability under capacitive loads, no-output-capacitor operation, low dynamic impedance (0.5 Ω at 1 mA), thermal hysteresis (1.4 mV), and compatibility with battery-powered data acquisition systems requiring long-term drift <120 ppm.
Technical Context
The LM4050AIM3X-5.0 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation. Its design eliminates need for external stabilization capacitors while maintaining stability across all capacitive loads - a critical advantage over traditional shunt references requiring careful output capacitance selection.
It achieves ±0.1% initial accuracy at 25°C via wafer-level fuse and Zener-zap trimming, and maintains tight regulation across 56 μA–15 mA operating current range. Dynamic impedance remains ≤0.5 Ω (at 1 mA, 120 Hz), enabling low-noise, high-PSRR performance in precision analog signal chains without series pass elements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage - sets precise bias point for ADCs, DACs, and comparators. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables single-point calibration in high-accuracy measurement systems. |
| Temp Coefficient | ≤50 ppm/°C (max, −40°C to +125°C) - ensures <±0.25% total drift over full extended range. |
| Operating Current | 56 μA min to 15 mA max - supports ultra-low-power sensor nodes and robust industrial supplies. |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes load-induced voltage shift in varying-current applications. |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz) - preserves SNR in 16-bit+ data converters without additional filtering. |
| Long-Term Drift | 120 ppm (1000 hrs at 25°C) - supports 10+ year system calibration intervals in field-deployed equipment. |
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 voltage node | Connects to regulated voltage rail; sinks all operating current plus load current - defines VREF at cathode-to-anode potential. |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; establishes reference potential for cathode voltage - no internal connection to substrate or power. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; not bonded - no routing or thermal relief required on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load - eliminates BOM cost, layout area, and ESR sensitivity of external COUT. |
| Tolerates capacitive loads | Guaranteed stability up to 10 μF - enables direct interface with ADC sample capacitors and LDO input filters. |
| Fixed 5.0 V breakdown | Factory-trimmed Zener-zap voltage - avoids external resistor networks or trimming potentiometers in production. |
| Low quiescent current | 56 μA minimum operating current - extends battery life in portable multimeters and IoT sensor transmitters. |
| Industrial & extended temp | Rated for −40°C to +125°C junction - supports automotive under-hood and industrial motor control environments. |
Applications
| Portable Data Loggers | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 1 Hz with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V excitation and ADC reference voltage - replaces dual-function ICs and discrete Zener+op-amp solutions. Use Value: Enables 12-month battery life (56 μA min current) and <±0.05% total error over temperature without recalibration. |
Use Scenario: 4–20 mA loop-powered analog input module in factory automation cabinet with ambient up to 70°C. IC Role / Device Role / Timing Role: Precision shunt reference for 24-bit delta-sigma ADC front-end - referenced against isolated 5 V supply derived from loop power. Use Value: Delivers <±0.01% gain error contribution and withstands 15 mA loop current surges without regulation loss. |
| Automotive Cabin Sensors | Medical Patient Monitor Front-End |
Use Scenario: Occupant detection system using capacitive sensing and low-noise signal conditioning in vehicle cabin (−40°C to +85°C). IC Role / Device Role / Timing Role: Low-drift 5.0 V reference for op-amp gain stages and ADC reference - co-located with sensor ASIC on same PCB. Use Value: Meets AEC-Q100 Grade 1 requirements (via LM4050-N-Q1 variant) and contributes <0.5 LSB error in 14-bit conversion. |
Use Scenario: Portable ECG amplifier with 100 dB CMRR requirement and 1 kHz bandwidth, powered by rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Ultra-low-noise (41 μVrms) shunt reference for instrumentation amplifier biasing and ADC reference - placed near analog front-end to minimize trace inductance. Use Value: Reduces baseline noise floor by 3× vs. standard bandgap references, improving ST-segment resolution in diagnostic-grade waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-5.0 | ±0.5% initial tolerance, higher 100 ppm/°C tempco, 20 μA min current | Lower-cost option for non-critical biasing where <0.1% accuracy not required | Select when budget constraints outweigh precision needs and thermal drift can be compensated in firmware. |
| REF3050AIDBZR | Series topology, 5.0 V output, ±0.2% tolerance, 50 ppm/°C, requires 1.2 V headroom | Requires higher supply voltage; unsuitable for low-voltage (<6.2 V) shunt configurations | Choose only if system has ≥6.2 V rail and benefits from series reference's lower output impedance at high currents. |
Compared with LM4040CIM3-5.0, LM4050AIM3X-5.0 delivers 5× tighter initial tolerance and half the temperature coefficient - critical for uncalibrated medical sensors. Versus REF3050AIDBZR, it operates down to 5.0 V supply (no headroom needed) but lacks current-sinking capability for active load regulation.
Availability
LM4050AIM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and automotive cabin sensing requiring stable component supply with guaranteed long-term availability and consistent parametric performance across manufacturing lots.
Supply support for LM4050AIM3X-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 over 50 years of precision reference design heritage.
The LM4050-N product line was engineered for space-constrained, high-accuracy analog systems requiring micropower shunt references with zero-output-capacitor operation - targeting portable test equipment, battery-powered sensors, and automotive subsystems.
FAQ
What is the minimum operating current for LM4050AIM3X-5.0?
The LM4050AIM3X-5.0 requires a minimum operating current of 56 μA at 25°C (73 μA over industrial temperature range −40°C to +85°C). This current must flow through the cathode-to-anode path to maintain regulation; below this threshold, the device exits breakdown and output voltage collapses. The LM4050AIM3X-5.0 datasheet specifies this value in Section 6.8 under "Minimum Operating Current".
Does LM4050AIM3X-5.0 require an external output capacitor?
No, the LM4050AIM3X-5.0 does not require an external output capacitor for stability - its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or LDO bypass caps up to 10 μF. This eliminates risk of oscillation due to ESR variations and reduces bill-of-materials count versus legacy shunt references.
What is the thermal hysteresis specification for LM4050AIM3X-5.0?
The LM4050AIM3X-5.0 exhibits 1.4 mV maximum thermal hysteresis over the −40°C to +125°C cycle, defined as the voltage difference measured at 25°C after exposure to −40°C versus after exposure to +125°C. This parameter directly impacts repeatability in cyclic temperature environments such as automotive engine bay monitoring or outdoor industrial enclosures.
Is LM4050AIM3X-5.0 qualified for automotive applications?
The LM4050AIM3X-5.0 itself is not AEC-Q100 qualified; however, the functionally identical LM4050QAIM3X-5.0 (or LM4050-N-Q1 family) is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on TI's automotive-grade flow. For automotive designs, specify the Q1-suffix variant - LM4050AIM3X-5.0 remains suitable for industrial and commercial applications requiring the same electrical specs.
How does LM4050AIM3X-5.0 compare to LM4050BIM3X-5.0 in accuracy?
The LM4050AIM3X-5.0 offers ±0.1% initial tolerance at 25°C, whereas LM4050BIM3X-5.0 provides ±0.2%. Over the industrial temperature range (−40°C to +85°C), the A-grade part maintains ≤±0.425% total tolerance (including tempco), versus ≤±0.525% for the B-grade. This 0.1% difference translates to ±5 mV vs. ±10 mV absolute error at 5.0 V - critical for 12-bit+ systems where calibration is omitted.
LM4050AIM3X-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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3X-5.0 FAQ
1.How can I place an order for LM4050AIM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3X-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 LM4050AIM3X-5.0 reliable?
The price and inventory of LM4050AIM3X-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 LM4050AIM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4050AIM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3X-5.0?
LM4050AIM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3X-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 LM4050AIM3X-5.0?
For technical support, including LM4050AIM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3X-5.0 requirements.
6.How does Aetrix verify that LM4050AIM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3X-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 LM4050AIM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4050AIM3X-5.0?
All LM4050AIM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3X-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 LM4050AIM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4050AIM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3X-5.0 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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