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Texas Instruments LM4050QBEM3X4.1/NOPB
- Part No.:
- LM4050QBEM3X4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBEM3X4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,358
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Product details
Overview
LM4050QBEM3X4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 4.096 V reverse breakdown voltage with ±0.1% (A-grade) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 68 μA to 15 mA over −40°C to 125°C and requires no output capacitor-enabling use in space-constrained battery-powered data acquisition and 12-bit ADC reference circuits.
For engineers reviewing the LM4050QBEM3X4.1/NOPB datasheet, LM4050QBEM3X4.1/NOPB pinout, LM4050QBEM3X4.1/NOPB application, or LM4050QBEM3X4.1/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, stable operation with capacitive loads, low dynamic impedance (0.5 Ω), thermal hysteresis of 1.148 mV, and compatibility with single-supply 5 V 12-bit converters where 1 mV/LSB alignment is required.
Technical Context
The LM4050QBEM3X4.1/NOPB implements a curvature-corrected bandgap reference architecture with Zener-zap voltage trimming at wafer sort, achieving ±0.1% accuracy without external feedback. Its internal compensation eliminates need for output capacitance while maintaining stability across 0–15 mA load current and any capacitive load.
It functions as a two-terminal shunt regulator: cathode sinks current to maintain 4.096 V between cathode and anode (ground), with minimum operating current of 68 μA (typical) at 25°C and 78 μA over extended temperature range. The NC pin (Pin 3) must be left floating or tied to anode to avoid EMI-induced errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - enables exact 1 mV/LSB scaling for 12-bit ADCs powered from 5 V supplies. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - guarantees ≤ ±4.1 mV absolute error before temperature or aging effects. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - contributes ≤ ±209 μV drift across full range, critical for precision instrumentation. |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - limits resolution loss in high-accuracy measurement front-ends. |
| Dynamic Impedance | 0.5 Ω at 1 mA - ensures minimal output voltage shift under fast load transients (e.g., SAR ADC sampling). |
| Operating Current | 68 μA to 15 mA - supports ultra-low-power sensor nodes and robust industrial signal chains alike. |
| Thermal Hysteresis | 1.148 mV - defines repeatability error after cycling between −40°C and 125°C, relevant for field-deployed equipment. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed die attach pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Current sink terminal where regulated 4.096 V appears relative to anode; must be driven via series resistor (RS) from unregulated supply. |
| Anode (Pin 2) | Reference ground / common return | Connected directly to system ground; serves as voltage reference point and current return path for cathode current and load. |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (anode); connecting to anode mitigates EMI coupling in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.096 V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity in 12-bit converter references. |
| No output capacitor required | Internally compensated design ensures stability with zero or arbitrary capacitive loading - simplifies layout and reduces start-up delay. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to 125°C ambient, with production traceability and process controls. |
| Tolerates capacitive loads | Stable under ≥100 nF bypass or ADC input capacitance - avoids oscillation in mixed-signal systems without isolation resistors. |
| Low 68 μA min operating current | Enables use in always-on battery monitors and energy-harvesting nodes where quiescent current directly impacts runtime. |
Applications
| Battery-Powered Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Portable multimeter or IoT environmental sensor logging analog inputs via 12-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V reference for ADC conversion, replacing bulkier three-terminal references. Use Value: Enables 1 mV/LSB resolution with 5 V supply; 68 μA operating current extends coin-cell life beyond 5 years in sleep mode. |
Use Scenario: Engine control unit measuring throttle position or coolant temperature using ratiometric sensors. IC Role / Device Role / Timing Role: Precision reference for analog front-end amplifiers and ADCs in ASIL-B compliant subsystems. Use Value: AEC-Q100 Grade 1 rating and 125°C operation ensure reliability under hood; ±0.1% tolerance maintains sensor accuracy across lifetime. |
| Industrial Process Monitoring | Precision Audio Level Detection |
|
Use Scenario: 4–20 mA loop-powered transmitter digitizing pressure or flow signals in factory automation. IC Role / Device Role / Timing Role: Reference source for sigma-delta ADC and isolated DAC in loop-powered designs with tight power budgets. Use Value: Stable 50 ppm/°C TC and 1.148 mV thermal hysteresis minimize calibration drift during thermal cycling in uncontrolled environments. |
Use Scenario: High-fidelity audio interface detecting peak levels for digital clipping prevention or loudness normalization. IC Role / Device Role / Timing Role: Low-noise (93 μVrms) reference for RMS-to-DC converters and envelope detectors in analog domain. Use Value: Wideband noise performance preserves dynamic range; shunt topology avoids ground-loop injection common with series references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF4132AIDBVR | Series topology, 3.3 V output, ±0.05% initial accuracy, higher quiescent current (380 μA), requires output capacitor. | Preferred where low dropout and load regulation matter more than ultra-low IQ; unsuitable for shunt-based topologies or capacitor-free layouts. | Select REF4132AIDBVR only when supply headroom permits series operation and tighter initial accuracy justifies higher power and added capacitor. |
| LT1004CZ-4.096 | Shunt topology, same 4.096 V output, ±0.5% initial tolerance (C grade), 100 ppm/°C TC, 200 μVrms noise, SOT-23 package. | Acceptable where cost sensitivity outweighs precision requirements; lacks AEC-Q100 qualification and exhibits higher noise and drift. | Choose LT1004CZ-4.096 for non-automotive, non-critical instrumentation where ±0.5% tolerance and higher noise are acceptable trade-offs. |
Compared with REF4132AIDBVR and LT1004CZ-4.096, LM4050QBEM3X4.1/NOPB uniquely combines AEC-Q100 Grade 1 qualification, capacitor-free operation, 68 μA min current, and ±0.1% tolerance in a shunt configuration - making it optimal for automotive and portable precision ADC references where layout simplicity and low power are mandatory.
Availability
LM4050QBEM3X4.1/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, automotive electronics, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QBEM3X4.1/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications including automotive sensors, portable instrumentation, and industrial data acquisition systems.
FAQ
What is the maximum operating current for LM4050QBEM3X4.1/NOPB?
The LM4050QBEM3X4.1/NOPB supports a maximum operating current of 15 mA. This limit ensures safe junction temperature operation within the SOT-23 package's thermal constraints (RθJA = 287°C/W) up to 125°C ambient. Exceeding 15 mA risks thermal runaway or accelerated long-term drift, and the device must be biased within 68 μA–15 mA to maintain regulation and specified accuracy. The LM4050QBEM3X4.1/NOPB datasheet specifies this as an absolute maximum condition with derating required above 25°C ambient.
Is LM4050QBEM3X4.1/NOPB qualified for automotive use?
Yes, LM4050QBEM3X4.1/NOPB is AEC-Q100 Grade 1 qualified, meaning it is certified for automotive applications with ambient operating temperatures from −40°C to +125°C. It is manufactured on an automotive-grade flow with enhanced process controls, lot traceability, and stress testing per AEC-Q100 Rev H. This qualification applies specifically to the "Q" suffix variant (LM4050Qxxx), confirming that LM4050QBEM3X4.1/NOPB meets requirements for engine bay and cabin modules where reliability under thermal cycling and vibration is critical.
Does LM4050QBEM3X4.1/NOPB require an output capacitor?
No, LM4050QBEM3X4.1/NOPB does not require an output capacitor due to internal compensation designed for unconditional stability. It remains stable with zero capacitance or arbitrary capacitive loads (e.g., ADC input capacitance, PCB trace capacitance). Adding a bypass capacitor is optional and does not degrade performance - unlike many shunt references, the LM4050QBEM3X4.1/NOPB avoids peaking or oscillation even with >100 nF loads, simplifying layout and eliminating capacitor-related aging or ESR concerns.
What is the thermal hysteresis specification for LM4050QBEM3X4.1/NOPB?
The thermal hysteresis of LM4050QBEM3X4.1/NOPB is 1.148 mV, measured as the voltage difference at 25°C after cycling from −40°C and then from 125°C. This parameter reflects mechanical stress-induced shifts in the silicon die and package interface, and is independent of temperature coefficient or long-term drift. For LM4050QBEM3X4.1/NOPB, this value is specified in Section 5.7 of the datasheet and directly impacts repeatability in field-deployed equipment subject to repeated thermal cycles - such as outdoor metering or automotive ECUs.
How does the NC pin (Pin 3) function on LM4050QBEM3X4.1/NOPB?
Pin 3 of LM4050QBEM3X4.1/NOPB is a no-connect (NC) terminal with no internal silicon connection. However, due to parasitic Schottky diode formation between Pin 2 (anode) and the die attach pad, TI recommends leaving Pin 3 floating or connecting it directly to Pin 2 in high-EMI environments (e.g., near switching regulators or motors). This prevents noise coupling into the reference node. The LM4050QBEM3X4.1/NOPB datasheet explicitly states this in Table 4-1 and Section 8.1, and improper handling of Pin 3 can cause unexpected offset or instability.
LM4050QBEM3X4.1/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:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QBEM3X4.1/NOPB FAQ
1.How can I place an order for LM4050QBEM3X4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBEM3X4.1/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 LM4050QBEM3X4.1/NOPB reliable?
The price and inventory of LM4050QBEM3X4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBEM3X4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBEM3X4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBEM3X4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBEM3X4.1/NOPB?
LM4050QBEM3X4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBEM3X4.1/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 LM4050QBEM3X4.1/NOPB?
For technical support, including LM4050QBEM3X4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBEM3X4.1/NOPB requirements.
6.How does Aetrix verify that LM4050QBEM3X4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBEM3X4.1/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 LM4050QBEM3X4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBEM3X4.1/NOPB?
All LM4050QBEM3X4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBEM3X4.1/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 LM4050QBEM3X4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBEM3X4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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