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Texas Instruments LM4050AIM3-4.1/NOPB
- Part No.:
- LM4050AIM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,913
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Product details
Overview
LM4050AIM3-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 4.096 V reverse breakdown voltage with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 73 μA to 15 mA over −40°C to +85°C and requires no output capacitor-used in high-resolution ADC biasing and portable instrumentation.
For engineers reviewing the LM4050AIM3-4.1/NOPB datasheet, LM4050AIM3-4.1/NOPB pinout, LM4050AIM3-4.1/NOPB application, or LM4050AIM3-4.1/NOPB equivalent, key selection criteria include initial voltage accuracy, low dynamic impedance (0.5 Ω), thermal hysteresis (1.148 mV), long-term stability (120 ppm), and compatibility with capacitive loads without external compensation.
Technical Context
The LM4050AIM3-4.1/NOPB uses bandgap-derived Zener-zap trimmed reverse breakdown voltage with curvature-corrected temperature drift compensation, enabling stable 4.096 V regulation across industrial temperature range. Its shunt topology sinks current via cathode while anode connects to ground, supporting two-terminal operation in series with a current-setting resistor.
It achieves micropower performance through optimized die design: minimum operating current is 73 μA at 25°C and 78 μA over full temperature range, with dynamic impedance held to ≤0.5 Ω at 1 mA and 120 Hz. No external capacitor is needed for stability-even with capacitive loads-due to internal phase compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage-precisely matches 12-bit DAC/ADC full-scale reference points. |
| Initial Tolerance | ±0.1% at 25°C (A grade)-enables single-point calibration in precision measurement systems. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +85°C-limits voltage drift to ±13.3 mV across full industrial range. |
| Dynamic Impedance | 0.5 Ω at 1 mA, 120 Hz-minimizes load-induced voltage shift in varying-current applications. |
| Noise (10 Hz–10 kHz) | 93 μVrms-low enough for 16-bit SAR ADC reference without additional filtering. |
| Operating Current Range | 73 μA to 15 mA-supports ultra-low-power sensor nodes and high-current buffer stages. |
| Long-Term Stability | 120 ppm after 1000 hrs-predictable aging behavior for field-deployed equipment calibration integrity. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Connects to supply rail via series resistor; sinks all load + reference current; sets regulated voltage at this node. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 0 V reference point for output voltage measurement. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or thermal pad required; electrically isolated from die. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load-eliminates BOM cost and layout area for external C. |
| Tolerates capacitive loads | Stable with ≥0 pF load capacitance-enables direct driving of ADC sample capacitors or op-amp inputs. |
| Fixed 4.096 V output | Exact binary-matched voltage for 12-bit systems (212 = 4096)-reduces scaling error in digital-to-analog conversion. |
| Low 73 μA min current | Enables operation from high-value current-limiting resistors-ideal for battery-powered devices with multi-year runtime. |
| AEC-Q100 Grade 1 option available | LM4050AIM3-4.1/NOPB itself is industrial-grade; automotive variant LM4050QAIM3-4.1/NOPB meets −40°C to +125°C requirements. |
Applications
| Portable Instrumentation | Data Acquisition Front-End |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power source. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation for ADC reference input and sensor bridge biasing. Use Value: Enables 0.0015% full-scale accuracy without trimming; 73 μA minimum current extends battery life beyond 5 years. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision voltage reference for 24-bit delta-sigma ADC, referenced against isolated 4.096 V rail. Use Value: 93 μVrms noise ensures <1 LSB noise floor at 24-bit resolution; 50 ppm/°C TC maintains calibration across cabinet temperature swings. |
| Precision Audio Level Detection | Energy Meter Reference |
Use Scenario: Class-D amplifier with RMS level monitoring using logarithmic detector IC. IC Role / Device Role / Timing Role: Stable DC reference for detector offset nulling and gain scaling circuitry. Use Value: Thermal hysteresis of only 1.148 mV prevents audible "popping" during ambient temperature cycling in consumer audio gear. |
Use Scenario: DIN-rail mounted kWh meter with metrology-grade ADC and anti-tampering features. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ASIC requiring long-term calibration retention. Use Value: 120 ppm long-term stability ensures <0.1% error accumulation over 10-year service life without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF43FHQDBVRQ1 | Series reference (not shunt); 4.096 V output; ±0.05% initial accuracy; higher quiescent current (450 μA). | Requires dedicated supply rail; unsuitable for two-terminal configurations or current-limited bias networks. | Select when system has clean, regulated supply and needs tighter initial accuracy than LM4050AIM3-4.1/NOPB offers. |
| ADR3440ARJZ-R7 | Series reference; 4.096 V; ±0.1% initial accuracy; 3.8 μVrms noise (10 Hz–10 kHz); 125 μA supply current. | Cannot replace LM4050AIM3-4.1/NOPB in shunt topologies; needs minimum load current and bypass cap. | Choose for ultra-low-noise applications where board space allows three-terminal layout and supply headroom exists. |
Compared with REF43FHQDBVRQ1 and ADR3440ARJZ-R7, the LM4050AIM3-4.1/NOPB uniquely supports true two-terminal operation, eliminates external capacitor dependency, and delivers lowest system-level BOM count for space-constrained shunt reference designs-despite higher noise and looser initial tolerance than premium series alternatives.
Availability
LM4050AIM3-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, precision audio components, and energy management applications requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4050AIM3-4.1/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, embedded processing, and connectivity technologies, with over 50 years of innovation in precision analog ICs.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems-designed to replace bulkier three-terminal references without sacrificing stability or accuracy.
FAQ
What is the minimum operating current for LM4050AIM3-4.1/NOPB at 25°C?
The LM4050AIM3-4.1/NOPB requires a minimum operating current of 73 μA at 25°C to maintain regulation within specification. This value increases to 78 μA across the full −40°C to +85°C industrial temperature range, as confirmed in Section 6.7 of the SNOS455G datasheet. Operating below this threshold risks loss of voltage accuracy and increased temperature sensitivity.
Does LM4050AIM3-4.1/NOPB require an external output capacitor?
No, the LM4050AIM3-4.1/NOPB does not require an external output capacitor. Its internal design provides inherent stability with any capacitive load-including direct connection to ADC input capacitors or op-amp feedback networks-eliminating the need for external compensation components. This is explicitly stated in the Features section and validated in the Functional Block Diagram of the datasheet.
What is the thermal hysteresis specification for LM4050AIM3-4.1/NOPB?
The LM4050AIM3-4.1/NOPB exhibits 1.148 mV thermal hysteresis, defined as the voltage difference measured at 25°C after cycling between −40°C and +125°C. This parameter is specified in Section 6.7 (Electrical Characteristics: 4.1-V Option) of the SNOS455G datasheet and directly impacts repeatability in environments with repeated temperature excursions.
Is LM4050AIM3-4.1/NOPB pin-compatible with other LM4050 variants?
Yes, all LM4050-N variants-including LM4050AIM3-4.1/NOPB-share identical SOT-23 (DBZ) pinout and package dimensions. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC. This mechanical and electrical compatibility enables drop-in replacement across voltage options (2.048 V, 2.5 V, 4.096 V, etc.) when board layout accommodates the same current-setting resistor value.
What is the wideband noise performance of LM4050AIM3-4.1/NOPB?
The LM4050AIM3-4.1/NOPB delivers 93 μVrms wideband noise over the 10 Hz to 10 kHz frequency range, measured at 100 μA operating current. This value is specified in Section 6.7 of the SNOS455G datasheet and determines achievable effective number of bits (ENOB) when used as an ADC reference-supporting up to 16-bit resolution without additional filtering.
LM4050AIM3-4.1/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):
- 4.096V
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3-4.1/NOPB FAQ
1.How can I place an order for LM4050AIM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-4.1/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 LM4050AIM3-4.1/NOPB reliable?
The price and inventory of LM4050AIM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-4.1/NOPB?
LM4050AIM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-4.1/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 LM4050AIM3-4.1/NOPB?
For technical support, including LM4050AIM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050AIM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-4.1/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 LM4050AIM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-4.1/NOPB?
All LM4050AIM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-4.1/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 LM4050AIM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050AIM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3-4.1/NOPB Tags
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