Analog Devices Inc./Maxim Integrated LM4050BEM3-3.0+T

Overview

LM4050BEM3-3.0+T from Analog Devices is a precision 3.000 V, two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% initial accuracy, ±50 ppm/°C max temperature coefficient over –40°C to +125°C, and 60 µA to 15 mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC biasing, sensor excitation, and portable power monitoring circuits.

For engineers reviewing the LM4050BEM3-3.0+T datasheet, LM4050BEM3-3.0+T pinout, LM4050BEM3-3.0+T application, or LM4050BEM3-3.0+T equivalent, key selection criteria include guaranteed 3.000 V output tolerance (±6.0 mV at +25°C), low 45 µVRMS wideband noise (10 Hz–10 kHz), no external capacitor requirement, and AEC-Q100 qualification for automotive use cases.

Technical Context

The LM4050BEM3-3.0+T implements a laser-trimmed bandgap core with internal pass transistor to maintain fixed 3.000 V reverse breakdown across 60 µA–15 mA shunt current. Its architecture eliminates need for output capacitance while tolerating arbitrary capacitive loads - enabling direct integration into high-impedance sensing nodes and battery-powered systems.

Guaranteed performance includes ±50 ppm/°C tempco over full –40°C to +125°C range, 0.8 Ω typical dynamic impedance at 1 mA, and long-term stability of 120 ppm after 1000 hours. The device operates as a two-terminal shunt element: cathode (Pin 1) and anode (Pin 2), with Pin 3 unconnected or tied to Pin 2.

Key Specifications

Pinout & Package

LM4050BEM3-3.0+T uses the 3-pin SC70 surface-mount package (1.8 mm × 1.8 mm), 50% smaller than SOT23. Thermal resistance is 340.4°C/W (Junction-to-Ambient, four-layer board). Pin 3 is NC and must be left unconnected or shorted to Pin 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431ACDBVR and MAX6012AEUR+T, LM4050BEM3-3.0+T offers optimal balance of SC70 size, 0.2% accuracy, and AEC-Q100 qualification - making it preferred for space-limited automotive and portable industrial designs where fixed 3.000 V is required.

Availability

LM4050BEM3-3.0+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive engine control units, and industrial process transmitters requiring stable component supply with guaranteed long-term availability.

Supply support for LM4050BEM3-3.0+T 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LM4050 series belongs to Analog Devices' precision voltage reference product line, engineered specifically for space-constrained, high-accuracy applications demanding low drift, micropower operation, and automotive-grade reliability.

FAQ

What is the exact output voltage tolerance of LM4050BEM3-3.0+T at +25°C?

The LM4050BEM3-3.0+T has a reverse breakdown voltage of 3.000 V with ±6.0 mV (±0.2%) tolerance at +25°C, as specified in the Electrical Characteristics table for the B-grade variant. This value is laser-trimmed and guaranteed across production lots - critical for eliminating post-assembly calibration in precision measurement systems using LM4050BEM3-3.0+T.

Does LM4050BEM3-3.0+T require an external capacitor for stability?

No, LM4050BEM3-3.0+T does not require an external output capacitor and remains stable with any capacitive load, including 0–10 µF. This is confirmed in the Applications Information section and eliminates layout complexity in battery-powered devices where LM4050BEM3-3.0+T serves as ADC reference - unlike many competing references that mandate specific COUT values.

What is the minimum operating current for LM4050BEM3-3.0+T?

The minimum operating (shunt) current for LM4050BEM3-3.0+T is 60 µA, verified across –40°C to +125°C. Below this threshold, regulation degrades - so LM4050BEM3-3.0+T is suitable for ultra-low-power IoT nodes where standby current budgets are tight, provided the design maintains ≥60 µA shunt current at all temperatures and supply conditions.

Is LM4050BEM3-3.0+T qualified for automotive applications?

Yes, LM4050BEM3-3.0+T is AEC-Q100 qualified (Grade 1: –40°C to +125°C), explicitly stated in the Features section and Ordering Information. This qualification covers stress testing for temperature cycling, humidity, and vibration - confirming LM4050BEM3-3.0+T's suitability for under-hood engine control, body electronics, and ADAS sensor interfaces.

What package type and dimensions does LM4050BEM3-3.0+T use?

LM4050BEM3-3.0+T uses the SC70-3 package (1.8 mm × 1.8 mm, 0.9 mm height), with land pattern number 90-0208. Its outline number is 21-0075, and thermal resistance is 340.4°C/W (Junction-to-Ambient on four-layer board) - making it 50% smaller than comparable SOT23 devices and ideal for miniaturized PCBs where LM4050BEM3-3.0+T replaces bulkier references.