Texas Instruments LM4050QCEM3X4.1/NOPB

Overview

LM4050QCEM3X4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 4.096 V nominal reverse breakdown voltage with ±4.1 mV (±0.1%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μV_rms 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.

For engineers reviewing the LM4050QCEM3X4.1/NOPB datasheet, LM4050QCEM3X4.1/NOPB pinout, LM4050QCEM3X4.1/NOPB application, or LM4050QCEM3X4.1/NOPB equivalent, this AEC-Q100 Grade 1 qualified device supports high-accuracy ADC/DAC referencing, battery-powered instrumentation, and automotive sensor signal conditioning where stable 4.096 V scaling enables exact 1 mV/LSB resolution in 12-bit systems.

Technical Context

The LM4050QCEM3X4.1/NOPB implements a curvature-corrected bandgap shunt architecture with Zener-zap trim for ±0.1% initial accuracy. Its internal compensation eliminates external capacitor requirements while maintaining stability across capacitive loads up to 10 nF.

It functions as a two-terminal device: cathode regulates voltage relative to anode (ground), with dynamic impedance of 0.5 Ω at 1 mA and thermal hysteresis of 1.148 mV after −40°C/125°C cycling - critical for repeatable metrology-grade measurements.

Key Specifications

Pinout & Package

SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Compared with TL4050C41IDBZR and ADR3440ARJZ-R7, the LM4050QCEM3X4.1/NOPB uniquely combines AEC-Q100 Grade 1 qualification, shunt topology simplicity, and 4.096 V/±0.1%/50 ppm/°C performance in a 3-pin SOT-23 - making it optimal for space-constrained automotive and portable precision systems where minimal external components and guaranteed automotive reliability are mandatory.

Availability

LM4050QCEM3X4.1/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and energy metering applications requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LM4050QCEM3X4.1/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 test equipment, and smart metering - emphasizing AEC-Q100 compliance, low drift, and capacitor-free operation.

FAQ

What is the maximum operating current for LM4050QCEM3X4.1/NOPB?

The LM4050QCEM3X4.1/NOPB supports a maximum operating current of 15 mA. This limit ensures safe power dissipation within the SOT-23 package's thermal constraints while maintaining regulation accuracy. Exceeding 15 mA risks junction overheating beyond the 150°C absolute maximum, potentially degrading long-term stability or causing permanent damage. The LM4050QCEM3X4.1/NOPB must be used with a series resistor sized to enforce this limit under worst-case supply and load conditions.

Does LM4050QCEM3X4.1/NOPB require an external output capacitor?

No, the LM4050QCEM3X4.1/NOPB does not require an external output capacitor due to its internally compensated shunt architecture. It remains stable with zero capacitance or with up to 10 nF at the cathode. Adding a ceramic bypass capacitor (e.g., 100 nF) is optional and may further reduce high-frequency noise but is never necessary for stability - a key advantage over older shunt references that mandate external compensation.

What is the thermal hysteresis specification for LM4050QCEM3X4.1/NOPB?

The LM4050QCEM3X4.1/NOPB exhibits 1.148 mV thermal hysteresis, defined as the voltage shift measured at 25°C before and after cycling between −40°C and 125°C. This parameter reflects mechanical stress-induced drift in the package and die interface, not electrical degradation. For applications demanding sub-millivolt repeatability (e.g., calibration standards), system-level hysteresis compensation or thermal soak protocols may be needed - the LM4050QCEM3X4.1/NOPB itself meets this spec as tested per TI's characterization methodology.

Is LM4050QCEM3X4.1/NOPB pin-compatible with other LM4050 variants?

Yes, all LM4050 SOT-23 variants - including LM4050QCEM3X4.1/NOPB - share identical pinout (Cathode/Anode/NC), package dimensions, and footprint. However, voltage option (4.096 V), grade (C-grade = ±0.5% initial tolerance), and qualification level (Q1 = AEC-Q100 Grade 1) are specific to LM4050QCEM3X4.1/NOPB. Substituting non-Q1 or non-4.096 V versions may compromise automotive compliance or system scaling accuracy.

How does LM4050QCEM3X4.1/NOPB achieve 4.096 V output?

The LM4050QCEM3X4.1/NOPB achieves its precise 4.096 V output through a curvature-corrected bandgap core combined with factory Zener-zap trimming during wafer sort. This process adjusts the reverse breakdown voltage to ±4.1 mV (±0.1%) tolerance at 25°C. The 4.096 V value is selected to align with binary-weighted scaling - enabling exact 1 mV per LSB in 12-bit converters operating from 5 V supplies - a feature directly implemented in the LM4050QCEM3X4.1/NOPB's silicon design.