Analog Devices Inc./Maxim Integrated MAX6133A41+

Overview

MAX6133A41+ from Maxim Integrated is a high-precision, low-power, low-dropout series voltage reference delivering 4.096V output with ±0.04% (max) initial accuracy, 3ppm/°C (max) temperature coefficient over –40°C to +125°C, and 200mV (max) dropout voltage at 10mA load. It operates from 4.2V to 12.6V input and serves as a stable reference in high-resolution data converters and portable instrumentation.

For engineers reviewing the MAX6133A41+ datasheet, MAX6133A41+ pinout, MAX6133A41+ application, or MAX6133A41+ equivalent, this page delivers verified electrical parameters, package mapping, thermal stability data, noise performance (32µV_P-P, 0.1Hz–10Hz), and real-world design context for precision analog systems requiring minimal quiescent current (45µA typ) and robust line/load regulation.

Technical Context

The MAX6133A41+ employs bandgap-based series-mode architecture with laser-trimmed thin-film resistors and post-package trimming to achieve 0.04% initial accuracy and 3ppm/°C tempco. Its internal circuitry draws only 45µA supply current-nearly independent of input voltage-and supports up to 15mA source current while maintaining <0.08mV/mA load regulation.

Designed for operation across –40°C to +125°C, it guarantees 4.0943V to 4.0977V output at +25°C (A-grade SO), exhibits 120ppm thermal hysteresis, and achieves 800µs turn-on settling to ±0.01% with 0.1µF output capacitance-enabling use in battery-powered, space-constrained applications where long-term stability (40ppm/1000h, SO) and low-noise performance are critical.

Key Specifications

Pinout & Package

MAX6133A41+ is housed in an 8-pin SO (Small Outline) package measuring 4.90mm × 3.90mm × 1.75mm (MS012), optimized for automated assembly and thermal reliability in high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5040AIDR and ADR444BRZ, MAX6133A41+ uniquely balances ultra-low quiescent current (45µA), industry-leading low-frequency noise (32µV_P-P), and guaranteed 3ppm/°C tempco in an SO-8 package-making it optimal for portable, high-resolution measurement systems where power, noise, and thermal stability are simultaneously constrained.

Availability

MAX6133A41+ is available at Aetrix Electronics and suitable for precision regulators, A/D and D/A converters, and high-accuracy industrial process control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6133A41+ 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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

The MAX6133 series was developed specifically for high-accuracy, low-power voltage reference needs in portable instrumentation and data acquisition systems-emphasizing tempco, noise, and quiescent current optimization over raw output drive.

FAQ

What is the maximum load current supported by the MAX6133A41+?

The MAX6133A41+ guarantees stable operation with up to 15mA of source current while maintaining specified accuracy and regulation. At 10mA load, dropout remains ≤200mV, and load regulation is bounded at 0.08mV/mA. Exceeding 15mA may cause output voltage deviation beyond datasheet limits and increased thermal drift-verify thermal derating in high-ambient environments using the SO package's 471mW dissipation rating.

Does the MAX6133A41+ require an input bypass capacitor?

Yes-the MAX6133A41+ requires a 0.1µF ceramic capacitor between IN and GND, placed as close as possible to the IN pin, to ensure optimal line-transient response and stability. Omitting this capacitor degrades PSRR by >20dB at 1kHz and increases susceptibility to supply noise coupling into the reference output, particularly in switching power supply environments.

Can the MAX6133A41+ be used with output capacitances larger than 0.1µF?

Yes-the MAX6133A41+ is stable with output capacitances from 0.1µF up to 100µF, including ceramic, tantalum, and aluminum electrolytic types. Larger capacitors (e.g., 10µF) improve transient response to step-load changes but increase turn-on settling time to ~2ms; use 0.1µF for fastest startup, 10µF for lowest output overshoot in DAC buffer applications.

What is the thermal hysteresis specification for the MAX6133A41+?

The MAX6133A41+ exhibits 120ppm thermal hysteresis-defined as the change in output voltage at +25°C before and after cycling from –40°C to +125°C. This value is identical for both SO and µMAX packages and represents mechanical stress-induced bandgap core shifts; it is non-cumulative and does not degrade with repeated thermal cycles.

How does the MAX6133A41+ compare to the MAX6133A25+ in terms of noise performance?

The MAX6133A41+ specifies 32µV_P-P (0.1Hz–10Hz) output noise, versus 16µV_P-P for the 2.5V MAX6133A25+. This difference arises from higher bandgap core current in higher-output variants, increasing 1/f noise proportionally; for 16-bit+ systems referencing 4.096V, the MAX6133A41+ still delivers <0.5LSB noise floor-well within design margins for most precision applications.