Analog Devices Inc./Maxim Integrated MAX6194BESA

Overview

MAX6194BESA from Maxim Integrated is a precision, micropower, low-dropout series-mode bandgap voltage reference delivering 4.500V output with ±2mV initial accuracy, 5ppm/°C max temperature coefficient, and 35µA max quiescent supply current. It operates from (VOUT + 0.2V) to 12.6V input, supports ±500µA load current, and is used in high-accuracy ADC/DAC biasing, portable instrumentation, and industrial process control systems requiring stable low-power references.

For engineers reviewing the MAX6194BESA datasheet, MAX6194BESA pinout, MAX6194BESA application, or MAX6194BESA equivalent, this page provides verified technical context, real-world design meaning for key specs, validated SO-8 pin mapping, confirmed alternatives with functional and application-level differences, and supply-chain support details specific to OEM and embedded design programs.

Technical Context

The MAX6194BESA employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve <5ppm/°C temperature coefficient and ±2mV initial accuracy across –40°C to +85°C. Its series-mode architecture enables bidirectional 500µA sourcing/sinking capability with only 100mV dropout at full load.

Internally compensated for stability with capacitive loads up to 2.2nF, it achieves 180µs turn-on settling time to 0.1% and delivers 76dB ripple rejection at 120Hz. Load regulation is specified at 0.16µV/µA and line regulation at 25µV/V - both guaranteed over full temperature and operating voltage range.

Key Specifications

Pinout & Package

MAX6194BESA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with exposed pad not electrically connected. Pin 1 is marked by notch or dot; pins are numbered counterclockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR3445BRMZ and REF5045AIDR, MAX6194BESA offers the optimal balance of micropower operation (35µA), robust ±500µA drive capability, and proven 2.2nF capacitive-load tolerance - making it uniquely suited for battery-powered instrumentation where both accuracy and flexibility matter.

Availability

MAX6194BESA is available at Aetrix Electronics and suitable for hand-held instruments, analog-to-digital converters, and industrial process control systems requiring stable component supply with long-term lifecycle assurance.

Supply support for MAX6194BESA 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

Maxim Integrated (now part of Analog Devices) designs high-performance analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.

The MAX6190–MAX6195/MAX6198 family was engineered specifically for micropower, high-accuracy voltage referencing in portable and space-constrained systems - prioritizing ultra-low quiescent current, low dropout, and exceptional temperature stability without external components.

FAQ

What is the maximum load current supported by MAX6194BESA?

MAX6194BESA supports ±500µA load current - meaning it can source up to 500µA to a load or sink up to 500µA from a load while maintaining output voltage regulation within specification. This bidirectional capability is guaranteed across the full –40°C to +85°C temperature range and up to 12.6V input voltage, with dropout voltage remaining ≤100mV at 500µA.

Does MAX6194BESA require an output capacitor for stability?

No, MAX6194BESA does not require an output capacitor for stability. It is internally compensated and remains stable with capacitive loads from 0 to 2.2nF. An external capacitor may be added to improve transient response in applications with fast load or supply steps, but it is optional - a key advantage for space-constrained PCB layouts where minimizing passive components is critical.

What is the dropout voltage specification for MAX6194BESA?

The dropout voltage for MAX6194BESA is 100mV maximum at 500µA load current, defined as the minimum VIN − VOUT required to maintain VOUT within 0.2% of its nominal value. This allows reliable operation from a 4.6V supply in 4.5V nominal systems, supporting designs using unregulated or loosely regulated rails without sacrificing reference accuracy.

How does the temperature coefficient of MAX6194BESA impact system accuracy?

With a maximum temperature coefficient of 5ppm/°C, MAX6194BESA contributes ≤225µV of output drift over its full –40°C to +85°C operating range (ΔT = 125°C). For a 4.500V reference, that equals ±0.005% full-scale error - well within the tolerance budget of 16-bit (0.0015%) and most 18-bit (0.0004%) data converters when combined with initial accuracy and long-term drift.

Is MAX6194BESA pin-compatible with other devices in the MAX6190–MAX6195 family?

Yes, MAX6194BESA shares the same 8-pin SO package and identical pinout (IN, GND, OUT, N.C.) with all members of the MAX6190–MAX6195/MAX6198 family, including MAX6190, MAX6192, MAX6193, MAX6195, and MAX6198. This enables drop-in replacement across output voltages (1.25V to 5.0V) and accuracy grades (A/B/C) without PCB redesign.