Analog Devices Inc./Maxim Integrated LM4050BEM3-5.0+T

Overview

LM4050BEM3-5.0+T from Analog Devices is a precision 5.000 V, two-terminal shunt voltage reference in SC70-3 package with 0.2% initial accuracy, ±50 ppm/°C max temperature coefficient, 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 LM4050BEM3-5.0+T datasheet, LM4050BEM3-5.0+T pinout, LM4050BEM3-5.0+T application, or LM4050BEM3-5.0+T equivalent, key selection criteria include guaranteed -40°C to +125°C operation, no external capacitor requirement, low 80 µV_RMS wideband noise (10 Hz–10 kHz), and AEC-Q100 qualification for automotive use cases.

Technical Context

The LM4050BEM3-5.0+T uses bandgap-based shunt regulation to maintain a fixed 5.000 V output across its terminals when reverse-biased with 60 µA–15 mA current. Its internal laser-trimmed resistor network ensures tight initial tolerance and low thermal drift.

It operates without external stabilization capacitors and remains stable under any capacitive load. The device clamps to ~0.7 V below ground under forward bias up to 10 mA, supporting bidirectional protection in mixed-polarity systems.

Key Specifications

Pinout & Package

LM4050BEM3-5.0+T is housed in a 3-pin SC70 surface-mount package (1.8 mm × 1.8 mm), 50% smaller than SOT23. Pin 3 is NC and must be left unconnected or tied 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 ADR3450ARJZ-R7, the LM4050BEM3-5.0+T uniquely combines fixed 5.000 V output, 0.2% accuracy, capacitor-free stability, and SC70 size-making it optimal for space- and power-constrained 5 V reference applications where noise and long-term drift matter.

Availability

LM4050BEM3-5.0+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive engine control units, industrial process transmitters, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM4050BEM3-5.0+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/LM4051 family was designed specifically for precision shunt reference applications demanding ultra-small size, wide operating current range, and guaranteed performance from -40°C to +125°C.

FAQ

What is the guaranteed output voltage tolerance of LM4050BEM3-5.0+T over temperature?

The LM4050BEM3-5.0+T guarantees ±0.7% total output voltage tolerance over -40°C to +125°C - comprising ±0.2% initial accuracy plus ±50 ppm/°C × 100°C = ±0.5% thermal drift. At +25°C, this translates to 5.000 V ±10 mV (±0.2%), and worst-case deviation remains within ±35 mV across full temperature range. This is confirmed in the Electrical Characteristics table for 5.000 V grade B devices.

Does LM4050BEM3-5.0+T require an external output capacitor for stability?

No, LM4050BEM3-5.0+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 op-amp feedback networks. This eliminates BOM cost and layout area typically needed for series references like ADR3450ARJZ-R7, which mandates a 1 µF bypass capacitor.

What is the minimum operating current for LM4050BEM3-5.0+T, and why does it matter?

The LM4050BEM3-5.0+T requires a minimum shunt current of 60 µA to maintain regulation. Below this threshold, output voltage deviates significantly from 5.000 V. This value determines the maximum allowable series resistor (RS) when used with high-voltage supplies and light loads - critical for battery-powered systems where quiescent current directly impacts runtime.

Is LM4050BEM3-5.0+T qualified for automotive applications?

Yes, LM4050BEM3-5.0+T is AEC-Q100 qualified for automotive applications. It is specified and tested over -40°C to +125°C, features 120 ppm long-term stability, and meets stress testing requirements for temperature cycling, humidity, and mechanical shock. The "/V" suffix variants (e.g., LM4050BEM3-5.0/V+T) denote specific automotive-grade ordering codes, but the base LM4050BEM3-5.0+T also carries full qualification per datasheet Section 1.

How does the noise performance of LM4050BEM3-5.0+T compare to other 5 V shunt references?

LM4050BEM3-5.0+T delivers 80 µV_RMS wideband noise (10 Hz–10 kHz), measured at 100 µA operating current. This is lower than TLVH431ACDBVR (120 µV_RMS) and competitive with higher-cost alternatives. Its noise spectral density peaks near 1 kHz (~30 nV/√Hz), making it suitable for 16-bit+ data acquisition without post-filtering - a key advantage in precision sensor signal chains where LM4050BEM3-5.0+T is deployed.