Analog Devices Inc./Maxim Integrated MAX6133A41

Overview

The MAX6133A41 from Maxim Integrated is a high-precision, low-power, low-dropout series voltage reference delivering a stable 4.096V output with ±0.04% (max) initial accuracy, 3ppm/°C (max) temperature coefficient, and 200mV (max) dropout voltage. It operates from 4.2V to 12.6V supply, draws only 45µA quiescent current at +25°C, and supports up to 15mA source current - ideal for precision A/D converters and portable instrumentation.

For engineers reviewing the MAX6133A41 datasheet, MAX6133A41 pinout, MAX6133A41 application, or MAX6133A41 equivalent, key selection considerations include its 4.096V output optimized for 12-bit ADCs with 4096-step full-scale range, guaranteed SO-8 package performance, and tight thermal stability across –40°C to +125°C.

Technical Context

The MAX6133A41 uses bandgap-based series-mode architecture with laser-trimmed thin-film resistors and post-package trimming to achieve ±0.04% initial accuracy and 3ppm/°C max tempco over –40°C to +125°C. Its low 45µA supply current remains virtually independent of input voltage, enabling battery-sensitive designs.

It delivers 15mA output sourcing capability with excellent line regulation (≤40µV/V) and load regulation (≤0.08mV/mA), while maintaining stability with 0.1µF to 100µF output capacitance. The device exhibits 32µV_P-P (0.1Hz–10Hz) noise and settles within 800µs to ±0.01% of final value.

Key Specifications

Pinout & Package

MAX6133A41 is packaged in an 8-pin SO (SOIC-N) surface-mount package measuring 4.90mm × 3.90mm × 1.75mm (JEDEC MS-012). Pin 1 is marked by a beveled corner or dot; pins 1, 3, and 7 are no-connect (N.C.), pins 5 and 8 are internally connected (I.C.) and must remain unconnected, pin 2 is IN (supply input), pin 4 is GND, and pin 6 is OUT (4.096V reference output).

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5040AIDR and ADR444BRZ, the MAX6133A41 uniquely balances ultra-low 45µA supply current, 3ppm/°C tempco, and SO-8 compatibility - making it optimal for space-constrained, battery-operated precision instruments where efficiency and stability are co-prioritized.

Availability

MAX6133A41 is available at Aetrix Electronics and suitable for high-accuracy industrial control, portable instrumentation, and precision A/D converter applications requiring stable component supply across extended temperature ranges and long product 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX6133A41 belongs to Maxim's precision voltage reference product line, engineered specifically for low-power, high-accuracy applications in portable and harsh-environment systems where stability, size, and efficiency are critical.

FAQ

What is the maximum operating temperature range for the MAX6133A41?

The MAX6133A41 is specified for continuous operation from –40°C to +125°C. All key parameters - including initial accuracy (±0.04%), temperature coefficient (3ppm/°C max), and dropout voltage (200mV max) - are guaranteed across this full industrial temperature range, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.

Does the MAX6133A41 require an input bypass capacitor?

Yes, the MAX6133A41 requires a 0.1µF ceramic capacitor between IN (pin 2) and GND (pin 4), placed as close to the device as possible. This capacitor improves line-transient response and ensures stability per the Typical Operating Circuit and Applications Information section. Omission may cause overshoot or regulation degradation under fast supply transients.

Can the MAX6133A41 drive a 10µF output capacitor?

Yes, the MAX6133A41 is explicitly characterized and guaranteed stable with output capacitance from 0.1µF up to 100µF, including ceramic, tantalum, and electrolytic types. A 10µF capacitor improves load-transient response and reduces output voltage undershoot/overshoot, as demonstrated in the LOAD TRANSIENT typical curves (toc13–toc16).

What is the turn-on settling time specification for the MAX6133A41?

The MAX6133A41 settles to within ±0.01% of its final 4.096V output in 800µs (typical), as specified in the Electrical Characteristics table for the _41 variant. This value increases slightly under worst-case conditions (minimum dropout, maximum load), but remains under 2ms - verified in TURN-ON TRANSIENT plots (toc19–toc22).

Is the MAX6133A41 pin-compatible with other MAX6133 variants?

Yes, all MAX6133 variants - including MAX6133A25, MAX6133A30, MAX6133A41, and MAX6133A50 - share identical 8-pin SO (MS-012) and µMAX packages with identical pinouts, footprints, and terminal functions. Only the output voltage and grade-specific parameters (tempco, accuracy) differ; no PCB redesign is needed when substituting within the same package type.