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Texas Instruments LM4050QBIM3X2.0/NOPB
- Part No.:
- LM4050QBIM3X2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBIM3X2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,318
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Product details
Overview
LM4050QBIM3X2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 2.048 V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, 41 μVrms wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 15 mA load current. It enables high-accuracy ADC/DAC biasing in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4050QBIM3X2.0/NOPB datasheet, LM4050QBIM3X2.0/NOPB pinout, LM4050QBIM3X2.0/NOPB application, or LM4050QBIM3X2.0/NOPB equivalent, key selection criteria include its no-output-capacitor-required design, capacitive-load tolerance, industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature range support, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QBIM3X2.0/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, ensuring stable 2.048 V reference across −40°C to +125°C. Its low dynamic impedance (0.3 Ω typical at 1 mA) and absence of minimum output capacitance requirement simplify layout in space-constrained designs.
It operates as a two-terminal device: cathode accepts input current and regulates voltage relative to anode (ground), with NC pin 3 unconnected. The device achieves ±0.1% accuracy at 25°C and maintains ≤±50 ppm/°C tempco over full temperature range, supporting precision analog signal chains requiring long-term stability and low thermal hysteresis (0.7 mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables exact 12-bit full-scale scaling (e.g., 2.048 V / 4096 = 0.5 mV per LSB) in SAR ADCs. |
| Initial Tolerance | ±0.1% at 25°C (A-grade); eliminates post-manufacturing calibration in production test equipment. |
| Tempco | ≤50 ppm/°C max over −40°C to +125°C; ensures <±1.3 mV total drift across full operating range. |
| Noise (10 Hz–10 kHz) | 41 μVrms typical; supports 16-bit+ resolution without added filtering in low-noise sensor front-ends. |
| Operating Current Range | 60 μA to 15 mA; allows ultra-low-power sleep modes (<100 μA) and robust regulation under dynamic loads. |
| Dynamic Impedance | 0.3 Ω typical at 1 mA; minimizes load-induced voltage sag during fast digital switching events. |
| Long-Term Stability | 120 ppm after 1000 hrs; ensures reference integrity over multi-year deployment in energy metering. |
Pinout & Package
SOT-23 (DBZ) package, 3-pin, body size 2.92 mm × 1.30 mm; thermally optimized for PCB-mounted operation with RθJA = 287°C/W.
| 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; serves as voltage reference point for all downstream circuitry. |
| NC (Pin 3) | No internal connection | Must be left floating; no routing or grounding required-reduces PCB trace count and layout complexity. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates external bypass cap, reducing BOM count and board area in wearables and IoT sensors. |
| Tolerates capacitive loads | Stable with >100 nF output capacitance-enables direct buffering into ADC sample-and-hold inputs. |
| Fixed 2.048 V output | Matches standard 12-bit DAC/ADC full-scale codes (211 = 2048), simplifying firmware scaling math. |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C junction temperature; suitable for engine control, ADAS power rails, and infotainment. |
| Low 60 μA min operating current | Enables microamp-level system sleep states while maintaining reference readiness for wake-on-event sensing. |
Applications
| Portable Medical Sensors | Automotive Cabin Controllers |
|---|---|
Use Scenario: Battery-powered ECG front-end amplifying mV-level biopotentials with 16-bit SAR ADC digitization. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V full-scale for ADC, rejecting supply ripple and thermal drift. Use Value: Enables <±1 LSB INL over temperature without recalibration, meeting IEC 60601-2-27 clinical accuracy requirements. |
Use Scenario: HVAC control module measuring cabin temperature and humidity with isolated SPI sensors. IC Role / Device Role / Timing Role: Precision voltage reference for sensor excitation and ADC reference in ASIL-B subsystems. Use Value: AEC-Q100 Grade 1 rating and 120 ppm long-term stability ensure functional safety compliance over 15-year vehicle life. |
| Industrial Data Loggers | Precision Audio ADC Front-Ends |
Use Scenario: Solar-powered environmental monitor logging soil moisture, pH, and light intensity every 5 minutes. IC Role / Device Role / Timing Role: Low-quiescent shunt reference powering analog sensor signal chains during intermittent active cycles. Use Value: 60 μA minimum current and 41 μVrms noise allow 24-bit delta-sigma ADC oversampling without gain-stage degradation. |
Use Scenario: Studio-grade microphone preamp with 24-bit audio ADC requiring ultra-low-noise analog bias. IC Role / Device Role / Timing Role: Clean DC reference for op-amp biasing and ADC reference in low-THD signal paths. Use Value: 0.7 mV thermal hysteresis and 50 ppm/°C tempco prevent audible pitch drift across studio temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, 50 ppm/°C max, but requires 1 μF output capacitor; higher 100 μA min current. | Less suitable for ultra-low-power sleep modes or capacitor-free layouts; better for high-PSRR buffered references. | Select REF3020AIDBZR only when output buffering and PSRR >80 dB are prioritized over board area and quiescent current. |
| ADR3420ARJZ-R7 | 2.048 V, 30 ppm/°C max, but series (not shunt) topology; requires 1.8–5.5 V supply and delivers 10 mA sink/source. | Not pin-compatible; needs supply rail and cannot replace shunt configuration without circuit redesign. | Choose ADR3420ARJZ-R7 only for new designs where active regulation, tighter tempco, and supply-referenced architecture are acceptable. |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, LM4050QBIM3X2.0/NOPB uniquely combines capacitor-free operation, 60 μA minimum current, and true shunt topology-making it the only drop-in replacement for legacy 2.048 V shunt reference footprints in space- and power-constrained designs.
Availability
LM4050QBIM3X2.0/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin controllers, industrial data loggers, and precision audio ADC front-ends requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050QBIM3X2.0/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 expertise in precision reference design and automotive-grade reliability validation.
The LM4050-N family was engineered for high-accuracy, low-power shunt reference applications in portable instrumentation, automotive electronics, and industrial control systems-prioritizing stability, small footprint, and qualification for harsh environments.
FAQ
What is the minimum operating current for LM4050QBIM3X2.0/NOPB?
The LM4050QBIM3X2.0/NOPB has a minimum operating current of 60 μA at 25°C, rising to 65 μA across the industrial temperature range (−40°C to +85°C). This ultra-low threshold enables use in battery-powered devices that spend most time in deep-sleep mode while retaining reference readiness. The LM4050QBIM3X2.0/NOPB maintains regulation and specified accuracy down to this current level without oscillation or dropout.
Is LM4050QBIM3X2.0/NOPB compatible with ceramic output capacitors?
Yes, LM4050QBIM3X2.0/NOPB is explicitly designed to tolerate capacitive loads-including ceramic, tantalum, and electrolytic types-without requiring series resistance or external compensation. Its internal architecture ensures stability with ≥100 nF capacitance, enabling direct connection to ADC sample-and-hold inputs or low-ESR bulk storage caps. This capability is confirmed in TI's SNOS455G datasheet Section 3 and Figure 15.
Does LM4050QBIM3X2.0/NOPB require an external capacitor for stability?
No, LM4050QBIM3X2.0/NOPB does not require any external output capacitor for stability-a key differentiator from many competing shunt references. Its internal compensation ensures unconditional stability across all load conditions and temperatures. This eliminates BOM cost, PCB area, and potential failure modes associated with capacitor aging or microphonics, as verified in TI's "No Output Capacitor Required" feature statement and electrical characterization data.
What is the temperature coefficient specification for LM4050QBIM3X2.0/NOPB?
The LM4050QBIM3X2.0/NOPB has a maximum temperature coefficient of 50 ppm/°C over the full operating range of −40°C to +125°C. At 25°C, the typical tempco is ±15 ppm/°C. This tight drift budget ensures total voltage deviation remains within ±1.3 mV across the extended temperature range-critical for applications like automotive cabin controllers and portable instrumentation where ambient temperature varies widely.
Is LM4050QBIM3X2.0/NOPB qualified for automotive applications?
Yes, LM4050QBIM3X2.0/NOPB is AEC-Q100 Grade 1 qualified (−40°C to +125°C), manufactured on an automotive-grade flow, and specified for use in safety-critical subsystems including engine control, ADAS domain controllers, and infotainment power management. Its qualification includes stress testing for thermal cycling, humidity, and long-term reliability-meeting TI's automotive quality standards as documented in SNOS455G Revision G.
LM4050QBIM3X2.0/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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QBIM3X2.0/NOPB FAQ
1.How can I place an order for LM4050QBIM3X2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBIM3X2.0/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 LM4050QBIM3X2.0/NOPB reliable?
The price and inventory of LM4050QBIM3X2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBIM3X2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBIM3X2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBIM3X2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBIM3X2.0/NOPB?
LM4050QBIM3X2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBIM3X2.0/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 LM4050QBIM3X2.0/NOPB?
For technical support, including LM4050QBIM3X2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBIM3X2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QBIM3X2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBIM3X2.0/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 LM4050QBIM3X2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBIM3X2.0/NOPB?
All LM4050QBIM3X2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBIM3X2.0/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 LM4050QBIM3X2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBIM3X2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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