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

Overview

LM4050BEM3-3.0/V+T from Analog Devices is a precision 3.000 V, two-terminal shunt voltage reference in SC70-3 package with 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 high-accuracy ADC/DAC biasing and portable power monitoring circuits.

For engineers reviewing the LM4050BEM3-3.0/V+T datasheet, LM4050BEM3-3.0/V+T pinout, LM4050BEM3-3.0/V+T application, or LM4050BEM3-3.0/V+T equivalent, key selection criteria include guaranteed AEC-Q100 qualification, no external capacitor requirement, ultra-low 45 µV_RMS wideband noise (10 Hz–10 kHz), and compatibility with capacitive loads in space-constrained automotive and industrial designs.

Technical Context

The LM4050BEM3-3.0/V+T uses a laser-trimmed bandgap core to maintain fixed 3.000 V reverse breakdown voltage across its cathode-anode terminals. Its internal architecture eliminates need for output stabilization capacitors while tolerating any capacitive load - a critical advantage over series references in low-power sensor nodes.

It operates as a two-terminal shunt device: reverse current (60 µA–15 mA) flows through an external series resistor to regulate voltage at the load node. Pin 3 is unconnected or tied to pin 2, enforcing strict two-terminal functional behavior without third-terminal control or adjustment.

Key Specifications

Pinout & Package

LM4050BEM3-3.0/V+T is housed in a 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).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431ACDBVR and MAX6035BESA+, the LM4050BEM3-3.0/V+T uniquely combines AEC-Q100 qualification, SC70-3 miniaturization, and guaranteed 0.2% accuracy with no external components - making it optimal for space- and reliability-critical automotive and portable industrial designs.

Availability

LM4050BEM3-3.0/V+T is available at Aetrix Electronics and suitable for automotive engine control units, portable battery monitoring systems, and industrial process transmitters requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for LM4050BEM3-3.0/V+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 technologies, serving industrial, automotive, communications, and healthcare markets since 1965.

The LM4050/LM4051 family was designed specifically for precision, low-power, space-constrained shunt reference applications - delivering guaranteed accuracy, temperature stability, and robustness in automotive and portable electronics.

FAQ

What is the exact output voltage tolerance of LM4050BEM3-3.0/V+T over temperature?

The LM4050BEM3-3.0/V+T has a 0.2% initial accuracy at +25°C and a ±50 ppm/°C temperature coefficient. Over –40°C to +125°C, its total output voltage tolerance is ±0.7%, corresponding to ±21 mV around the 3.000 V nominal value. This is confirmed in the Electrical Characteristics table for the 3.000 V variant under B-grade conditions and is guaranteed by design per Analog Devices' datasheet revision 16.

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

No, the LM4050BEM3-3.0/V+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or LDO bypass networks. This eliminates BOM cost and layout complexity - a key differentiator versus many series references.

What does the "/V" suffix in LM4050BEM3-3.0/V+T signify?

The "/V" suffix indicates AEC-Q100 qualification for automotive applications. LM4050BEM3-3.0/V+T is tested and certified to meet stress test requirements for Grade 1 (–40°C to +125°C ambient), including HTOL, TC, and ESD testing. This makes it suitable for use in engine control, body electronics, and ADAS subsystems where reliability under thermal and electrical stress is mandatory.

Can LM4050BEM3-3.0/V+T operate at 60 µA shunt current and still maintain regulation?

Yes, LM4050BEM3-3.0/V+T is fully specified to regulate stably at its minimum operating current of 60 µA. At this current, the device maintains 3.000 V output within its guaranteed tolerance band and exhibits low dynamic impedance (≤0.8 Ω). This enables use in ultra-low-power applications such as battery-backed real-time clocks or energy-harvesting sensor nodes.

What is the maximum allowable shunt current for LM4050BEM3-3.0/V+T?

The absolute maximum shunt current for LM4050BEM3-3.0/V+T is 20 mA, per Absolute Maximum Ratings. However, the recommended operating range is 60 µA to 15 mA to ensure regulation integrity and avoid exceeding power dissipation limits. At 15 mA and 3.000 V, power dissipation is 45 mW - well within the SC70-3 package's 235.3 mW limit at +70°C ambient.