Analog Devices Inc./Maxim Integrated MAX6193BESA+

Overview

MAX6193BESA+ from Maxim Integrated is a precision, micropower, low-dropout series-mode bandgap voltage reference delivering 3.000V 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 sourcing/sinking, and is used in high-accuracy ADC/DAC biasing and portable instrumentation power rails.

For engineers reviewing the MAX6193BESA+ datasheet, MAX6193BESA+ pinout, MAX6193BESA+ application, or MAX6193BESA+ equivalent, key selection criteria include guaranteed 100mV dropout at 500µA, 0.14µV/µA load regulation, 20µV/V line regulation, stability with up to 2.2nF capacitive load, and SO-8 package compatibility for space-constrained analog signal chains.

Technical Context

The MAX6193BESA+ employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve <5ppm/°C temperature coefficient and ±2mV initial accuracy over -40°C to +85°C. Its series-mode architecture enables bidirectional 500µA load current capability without external components.

Internally compensated design ensures fast 100µs turn-on settling to 0.1% with 50pF load, while maintaining stability across 0–2.2nF output capacitance. Supply current remains virtually invariant (0.8µA/V variation) across input voltage range, optimizing battery life in portable systems.

Key Specifications

Pinout & Package

MAX6193BESA+ is housed in an 8-pin SO (Small Outline) package with exposed pad (RoHS-compliant, lead-free). Pin 1 is OUT, Pin 2 is IN, Pin 4 is GND; Pins 1,3,5,7,8 are No Connect (N.C.). The package supports standard SO-8 PCB footprints and reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR3430BRMZ and REF3030AIDBZR, MAX6193BESA+ provides superior temperature stability (5ppm/°C vs. 10/50ppm/°C) and guaranteed 2.2nF capacitive-load tolerance, making it optimal for high-resolution data acquisition where thermal drift and dynamic load response are critical.

Availability

MAX6193BESA+ 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 guaranteed long-term parametric consistency.

Supply support for MAX6193BESA+ 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 precision analog and mixed-signal ICs for demanding industrial, medical, and communications applications.

The MAX6190–MAX6195/MAX6198 family was engineered specifically for micropower, low-dropout voltage references in battery-operated and space-constrained instrumentation where accuracy, stability, and efficiency are non-negotiable.

FAQ

What is the maximum load current supported by MAX6193BESA+?

MAX6193BESA+ supports sourcing and sinking up to ±500µA while maintaining specified accuracy and dropout voltage. At 500µA sink or source current, the device guarantees ≤100mV dropout and retains its ±2mV initial accuracy and 5ppm/°C temperature coefficient over the full -40°C to +85°C operating range. This bidirectional capability enables use in both active and passive load configurations.

Does MAX6193BESA+ require an external output capacitor for stability?

No, MAX6193BESA+ is internally compensated and stable with output capacitance ranging from 0 to 2.2nF. An external capacitor is optional and recommended only in applications subject to rapid load or supply transients-where it reduces overshoot/undershoot and improves transient response. For most precision ADC reference applications with static loads, no capacitor is needed, saving board space and cost.

What is the minimum input voltage required for MAX6193BESA+ to regulate at 3.000V?

The minimum input voltage for MAX6193BESA+ is VOUT + 0.2V = 3.2V under all operating conditions. At 500µA load current, the dropout voltage is guaranteed ≤100mV, meaning regulation is maintained down to 3.1V input. However, the datasheet specifies 3.2V as the absolute minimum to ensure full parameter compliance-including initial accuracy, temperature coefficient, and load regulation-across temperature and process variations.

How does the supply current of MAX6193BESA+ vary with input voltage?

MAX6193BESA+ exhibits exceptional supply current stability: quiescent current is guaranteed ≤35µA and varies by only 0.8µA/V across its input voltage range (3.2V to 12.6V). This near-constant current draw-unlike shunt references whose current scales with input voltage-maximizes battery life and simplifies power budgeting in portable systems where input voltage may fluctuate widely.

Is MAX6193BESA+ compatible with standard SO-8 PCB footprints?

Yes, MAX6193BESA+ uses a standard 8-pin SO (Small Outline) package with 1.27mm pitch and conforms to JEDEC MS-012 outlines. The "+" suffix denotes RoHS-compliant, lead-free construction, and the land pattern matches industry-standard SO-8 footprints. Thermal pad variants are not present in this version; the package has no exposed thermal pad, simplifying layout and assembly.