My Inquiry
My Account
Texas Instruments LM4050QCEM3X2.0/NOPB
- Part No.:
- LM4050QCEM3X2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3X2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,233
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4050QCEM3X2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V nominal output with ±0.1% (A-grade) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to 125°C and requires no output capacitor-enabling stable regulation in battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LM4050QCEM3X2.0/NOPB datasheet, LM4050QCEM3X2.0/NOPB pinout, LM4050QCEM3X2.0/NOPB application, or LM4050QCEM3X2.0/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, fixed 2.048 V output optimized for 12-bit ADC/DAC LSB alignment, low thermal hysteresis (0.7 mV), and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4050QCEM3X2.0/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap and fuse trimming at wafer sort to achieve ±0.1% initial accuracy. Its internal compensation eliminates need for external output capacitance while maintaining stability across full 60 μA–15 mA operating current range.
It functions as a two-terminal device: cathode regulates against anode (ground), with reverse breakdown voltage defined by process-trimmed Zener-bandgap hybrid structure. Thermal hysteresis (0.7 mV) and long-term drift (120 ppm/1000 hrs) are characterized over −40°C to 125°C, supporting high-stability applications in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal - matches 12-bit ADC full-scale LSB = 0.5 mV when referenced to 2.5 V supply rails. |
| Initial Tolerance (A grade) | ±0.1% at 25°C - ±2.048 mV absolute error, enabling single-point calibration in precision data acquisition. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - adds ≤±0.102 mV error across full range, critical for metering accuracy. |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz) - supports <16-bit ENOB in low-frequency measurement systems. |
| Operating Current | 60 μA min / 15 mA max - enables ultra-low-power operation in coin-cell devices and robust sourcing in active filters. |
| Thermal Hysteresis | 0.7 mV - voltage shift after cycling −40°C → 25°C → 125°C → 25°C, limiting repeatability error in field-deployed sensors. |
| AEC-Q100 Grade | Grade 1 (−40°C to 125°C) - qualified for automotive powertrain and ADAS sensor front-ends per TI's automotive flow. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die attach pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input & regulated voltage node | Connects to series resistor (RS) from unregulated supply; output voltage appears between Cathode and Anode. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; serves as common reference point for all downstream circuitry. |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (Anode); avoids EMI coupling in noisy automotive environments. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and layout area for bypass caps in space-constrained modules. |
| Fixed 2.048 V output | Enables exact 1 mV LSB resolution for 12-bit converters powered from 2.5 V rails - removes need for external resistor dividers. |
| AEC-Q100 Grade 1 | Qualified for automotive use up to 125°C junction temperature - supports deployment in engine control units and battery management systems. |
| Low 41 μVrms noise | Minimizes added uncertainty in high-resolution analog front-ends - critical for energy metering and medical sensor signal chains. |
| 60 μA minimum operating current | Supports >10-year operation on CR2032 batteries in wireless sensor nodes - extends maintenance intervals in industrial IoT deployments. |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 0.1% accuracy over 0–10 V range. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V基准 for SAR ADC and DAC calibration. Use Value: Enables single-point factory calibration with <±0.5 mV total error budget across temperature and life, meeting IEC 61010 Class II requirements. |
Use Scenario: Engine coolant temperature sensor interface in Tier-1 ECU with CAN output. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric RTD-to-digital conversion using 24-bit ΣΔ ADC. Use Value: Maintains <±0.2°C measurement accuracy over −40°C to 125°C ambient due to 50 ppm/°C tempco and AEC-Q100 qualification. |
| Energy Metering Reference | Industrial Process Controller ADC Reference |
Use Scenario: Residential smart meter measuring active/reactive power with 0.5S class compliance. IC Role / Device Role / Timing Role: Low-noise 2.048 V reference for metrology-grade 24-bit ADC sampling current/voltage channels. Use Value: 41 μVrms noise contributes <0.002% of full-scale error, satisfying ANSI C12.20 accuracy requirements without oversampling. |
Use Scenario: 4–20 mA loop-powered transmitter with HART modulation in chemical plant PLC I/O module. IC Role / Device Role / Timing Role: Stable shunt reference for precision DAC generating analog output and internal ADC monitoring. Use Value: 0.7 mV thermal hysteresis ensures repeatable 4–20 mA output calibration across seasonal ambient swings, reducing field recalibration frequency. |
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, ±0.2% initial tolerance, 50 ppm/°C, 25 μVrms noise, SOT-23, but non-automotive grade. | Lacks AEC-Q100 qualification; limited to industrial/commercial temperature range (−40°C to 85°C). | Select for cost-sensitive industrial designs where automotive qualification is unnecessary and lower noise is prioritized. |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial tolerance, 30 ppm/°C, 35 μVrms noise, SOT-23, but not AEC-Q100 qualified. | Superior tempco and noise, but no automotive qualification or extended temperature support beyond 105°C. | Prefer for high-precision lab equipment or test fixtures requiring tighter drift and lower noise than LM4050QCEM3X2.0/NOPB offers. |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, the LM4050QCEM3X2.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 2.048 V output, and SOT-23 packaging - making it the only drop-in solution for automotive sensor signal chains requiring both precision and functional safety compliance.
Availability
LM4050QCEM3X2.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, energy metering, and industrial process controllers requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050QCEM3X2.0/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 component manufacturing.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, high-accuracy applications-including automotive sensor signal conditioning, portable instrumentation, and energy metering-where stability, low noise, and qualification rigor are mandatory.
FAQ
What is the maximum operating temperature for the LM4050QCEM3X2.0/NOPB?
The LM4050QCEM3X2.0/NOPB is rated for operation from −40°C to +125°C ambient temperature and is AEC-Q100 Grade 1 qualified. Its maximum junction temperature is 150°C, and thermal derating follows RθJA = 287°C/W for the SOT-23 package. This makes LM4050QCEM3X2.0/NOPB suitable for under-hood automotive applications and industrial environments with elevated ambient conditions.
Does the LM4050QCEM3X2.0/NOPB require an external output capacitor?
No, the LM4050QCEM3X2.0/NOPB is internally compensated and does not require an external output capacitor for stability-even with capacitive loads. This simplifies PCB layout and reduces BOM count. However, a small ceramic bypass capacitor (e.g., 100 nF) may be added at the cathode if local noise filtering is needed; LM4050QCEM3X2.0/NOPB remains stable with such additions.
What is the minimum cathode current required for regulation in the LM4050QCEM3X2.0/NOPB?
The LM4050QCEM3X2.0/NOPB requires a minimum cathode current of 60 μA at 25°C and 65 μA across the full −40°C to +125°C range to maintain regulation. This value is confirmed in Section 5.5 (Electrical Characteristics: 2V Option) of the TI datasheet. Operating below this threshold risks loss of output voltage accuracy and increased noise in the LM4050QCEM3X2.0/NOPB.
How does the LM4050QCEM3X2.0/NOPB achieve its ±0.1% initial accuracy?
The LM4050QCEM3X2.0/NOPB achieves ±0.1% initial accuracy via wafer-level fuse and Zener-zap trimming during sort testing, combined with curvature-corrected bandgap design. This process ensures that A-grade devices (like LM4050QCEM3X2.0/NOPB) meet ±2.048 mV absolute tolerance at 25°C before packaging - verified 100% in production test, not estimated or binned post-test.
Is Pin 3 of the LM4050QCEM3X2.0/NOPB electrically connected?
No, Pin 3 (NC) of the LM4050QCEM3X2.0/NOPB has no internal connection. Per TI's datasheet (Section 4), it must be left floating or tied to Pin 2 (Anode) - especially in high-EMI environments like automotive powertrain modules - to prevent noise coupling into the reference node and ensure stable operation of the LM4050QCEM3X2.0/NOPB.
LM4050QCEM3X2.0/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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- 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
LM4050QCEM3X2.0/NOPB FAQ
1.How can I place an order for LM4050QCEM3X2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3X2.0/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 LM4050QCEM3X2.0/NOPB reliable?
The price and inventory of LM4050QCEM3X2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3X2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3X2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3X2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3X2.0/NOPB?
LM4050QCEM3X2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3X2.0/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 LM4050QCEM3X2.0/NOPB?
For technical support, including LM4050QCEM3X2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3X2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3X2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3X2.0/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 LM4050QCEM3X2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3X2.0/NOPB?
All LM4050QCEM3X2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3X2.0/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 LM4050QCEM3X2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3X2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCEM3X2.0/NOPB Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
