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Texas Instruments LM4050QCEM3X8.2/NOPB
- Part No.:
- LM4050QCEM3X8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3X8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,086
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Product details
Overview
LM4050QCEM3X8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 8.192 V nominal reverse breakdown voltage with ±0.1% (A-grade) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 150 μVrms wideband noise (10 Hz–10 kHz). It operates from 74 μA to 15 mA over −40°C to 125°C and requires no output capacitor-used in high-resolution ADC/DAC references and automotive sensor signal conditioning.
For engineers reviewing the LM4050QCEM3X8.2/NOPB datasheet, LM4050QCEM3X8.2/NOPB pinout, LM4050QCEM3X8.2/NOPB application, or LM4050QCEM3X8.2/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, fixed 8.192 V output enabling 2 mV/LSB for 12-bit converters on ≥10 V supplies, low dynamic impedance (0.6 Ω), and stable operation with capacitive loads.
Technical Context
The LM4050QCEM3X8.2/NOPB implements a curvature-corrected bandgap reference architecture with Zener-zap trim 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.
This device functions strictly as a two-terminal shunt regulator: cathode regulates against anode (ground), with minimum operating current of 74 μA (typical) at 25°C rising to 100 μA over −40°C to 125°C. Thermal hysteresis is 2.3 mV after cycling between −40°C and 125°C, and long-term stability is 120 ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal reverse breakdown voltage at 150 μA - enables exact 2 mV/LSB scaling for 12-bit ADCs/DACs on ≥10 V supplies |
| Initial Tolerance | ±0.1% (A grade) at 25°C - corresponds to ±8.2 mV absolute error, verified via fuse/Zener-zap trim during wafer sort |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - ensures ≤±42 mV total drift across full range, critical for metering and instrumentation |
| Noise (10 Hz–10 kHz) | 150 μVrms typical at 150 μA - limits quantization uncertainty in 16-bit+ data acquisition systems |
| Dynamic Impedance | 0.6 Ω at 1 mA, 120 Hz - maintains regulation accuracy under fast load transients up to 15 mA |
| Operating Current | 74–100 μA min (−40°C to 125°C), 15 mA max - supports ultra-low-power battery operation and robust industrial supply margins |
| Long-Term Stability | 120 ppm over 1000 hours - ensures calibration retention in energy metering and process control applications |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, rated for −40°C to 125°C extended temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to series resistor (RS) from unregulated supply; voltage develops between this pin and Anode |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as 0 V reference point for all measurements and load connections |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (Anode); not bonded internally - avoids EMI coupling in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 8.192 V output | Eliminates external resistor divider; directly matches LSB scaling for 12-bit converters on 10 V+ rails |
| No output capacitor required | Internally compensated design ensures stability with zero or arbitrary capacitive loading - reduces BOM count and layout area |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to 125°C ambient - supports engine control, ADAS sensors |
| Tolerates capacitive loads | Stable with >100 nF ceramic or tantalum bypass caps - simplifies noise filtering in precision analog front-ends |
| Low micropower operation | 74 μA minimum current enables >10-year battery life in portable instrumentation and remote sensors |
Applications
| Battery-Powered Precision Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Continuous 12-bit ADC sampling in handheld environmental monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 8.192 V reference for SAR ADC - sets full-scale range and LSB resolution. Use Value: Enables 2 mV/LSB quantization without trimming; 74 μA min current extends battery life beyond 5 years at 1 SPS. |
Use Scenario: Front-end reference for pressure and temperature sensors in powertrain control modules. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference supplying excitation and ADC reference in harsh under-hood environments. Use Value: Maintains ±0.1% accuracy and <2.3 mV thermal hysteresis across −40°C to 125°C - ensures consistent sensor linearity over lifetime. |
| Industrial Energy Metering | High-Resolution Test Equipment |
Use Scenario: Reference source in Class 0.2 electricity meters measuring active/reactive power over decades. IC Role / Device Role / Timing Role: Primary voltage reference for metrology-grade sigma-delta ADCs - defines measurement traceability. Use Value: 120 ppm long-term stability and 50 ppm/°C tempco meet IEC 62053-21 accuracy requirements without periodic recalibration. |
Use Scenario: Calibration reference in benchtop multimeters and automated test systems requiring sub-10 ppm repeatability. IC Role / Device Role / Timing Role: Low-noise (150 μVrms) shunt reference feeding precision DACs and comparator thresholds. Use Value: 0.6 Ω dynamic impedance and 150 μVrms noise support 6½-digit resolution and <0.001% reading uncertainty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040QCEM3-8.2/NOPB | Higher 100 ppm/°C max tempco; 100 μVrms noise; 60 μA min current; non-AEC-Q100 | Lacks automotive qualification; less stable over temperature - suitable for cost-sensitive industrial use only | Select when AEC-Q100 is unnecessary and 50 ppm/°C stability is not required |
| REF5082IDR | Series reference (not shunt); 8.2 V output; 3 ppm/°C max tempco; 10 μVrms noise; requires input capacitor | Requires higher supply headroom (>9.5 V); incompatible topology - cannot replace shunt configuration without circuit redesign | Choose only if upgrading to series topology is feasible and ultra-low noise/stability justifies added complexity |
Compared with LM4040QCEM3-8.2/NOPB, LM4050QCEM3X8.2/NOPB delivers tighter temperature stability and automotive qualification; compared with REF5082IDR, it offers direct shunt compatibility and lower minimum current but trades off noise and tempco performance - making it optimal for space-constrained, AEC-Q100-compliant shunt designs.
Availability
LM4050QCEM3X8.2/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and industrial energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QCEM3X8.2/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 high-reliability components for industrial, automotive, and communications markets.
The LM4050-N/-Q1 product line delivers precision micropower shunt references optimized for space-constrained, high-accuracy applications including automotive sensing, portable instrumentation, and metrology-grade energy measurement.
FAQ
What is the operating temperature range for LM4050QCEM3X8.2/NOPB?
The LM4050QCEM3X8.2/NOPB is qualified for the extended temperature range of −40°C to +125°C ambient, meeting AEC-Q100 Grade 1 requirements. Its electrical specifications-including ±0.1% initial tolerance, ≤50 ppm/°C temperature coefficient, and 74–100 μA minimum operating current-are guaranteed across this full range. This makes LM4050QCEM3X8.2/NOPB suitable for under-hood automotive applications and industrial environments where thermal stress is severe.
Does LM4050QCEM3X8.2/NOPB require an external output capacitor?
No, LM4050QCEM3X8.2/NOPB does not require an external output capacitor due to internal compensation. It remains stable with zero, small, or large capacitive loads-including >100 nF ceramic or tantalum bypass capacitors-enabling flexible noise filtering without risk of oscillation. This eliminates a common BOM item and simplifies PCB layout in space-constrained designs where LM4050QCEM3X8.2/NOPB is deployed.
What is the minimum cathode current needed for regulation in LM4050QCEM3X8.2/NOPB?
The LM4050QCEM3X8.2/NOPB requires a minimum cathode current of 74 μA (typical) at 25°C, increasing to 100 μA maximum across −40°C to +125°C. This value is specified in Section 5.9 of the datasheet under "IRMIN Minimum Operating Current." Supplying less than this current will cause loss of regulation and output voltage collapse - critical to verify when designing for ultra-low-power battery operation using LM4050QCEM3X8.2/NOPB.
How does LM4050QCEM3X8.2/NOPB support 12-bit ADC resolution?
LM4050QCEM3X8.2/NOPB's 8.192 V nominal output yields exactly 2 mV per LSB for a 12-bit ADC with 4096 codes (8.192 V ÷ 4096 = 2 mV). This eliminates scaling errors and simplifies firmware calibration. When used with ≥10 V supplies, LM4050QCEM3X8.2/NOPB enables direct full-scale utilization - a key advantage over generic 8.2 V references that lack binary-aligned voltage values.
Is LM4050QCEM3X8.2/NOPB pin-compatible with other LM4050 variants?
Yes, LM4050QCEM3X8.2/NOPB uses the standard 3-pin SOT-23 (DBZ) package with identical pinout (Cathode, Anode, NC) across all LM4050-N and LM4050-Q1 variants. Pin 3 (NC) must remain floating or tied to Pin 2 (Anode) per TI's EMI guidance. This mechanical and electrical compatibility allows drop-in replacement among voltage options (e.g., 2.5 V, 5 V, 8.2 V) and grades (A/B/C) without PCB changes - provided thermal and current limits are respected for LM4050QCEM3X8.2/NOPB.
LM4050QCEM3X8.2/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):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCEM3X8.2/NOPB FAQ
1.How can I place an order for LM4050QCEM3X8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3X8.2/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 LM4050QCEM3X8.2/NOPB reliable?
The price and inventory of LM4050QCEM3X8.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3X8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3X8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3X8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3X8.2/NOPB?
LM4050QCEM3X8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3X8.2/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 LM4050QCEM3X8.2/NOPB?
For technical support, including LM4050QCEM3X8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3X8.2/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3X8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3X8.2/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 LM4050QCEM3X8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3X8.2/NOPB?
All LM4050QCEM3X8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3X8.2/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 LM4050QCEM3X8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3X8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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