Analog Devices Inc./Maxim Integrated MAX6133A30+

Overview

MAX6133A30+ from Maxim Integrated is a precision series voltage reference delivering 3.000V output with ±0.04% initial accuracy (A-grade SO package), 3ppm/°C max temperature coefficient, and 200mV max dropout voltage. It draws only 40µA quiescent current and supports up to 15mA source current, making it ideal for high-resolution ADC/DAC biasing in battery-powered instrumentation.

For engineers reviewing the MAX6133A30+ datasheet, MAX6133A30+ pinout, MAX6133A30+ application, or MAX6133A30+ equivalent, this page provides verified specifications, package mapping, real-world load/line regulation behavior, thermal hysteresis data, and validated alternative options for portable, industrial, and communication systems requiring stable 3.0V reference voltage.

Technical Context

The MAX6133A30+ 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 tempco over –40°C to +125°C. Its low-noise design delivers 24µV_P-P (0.1Hz–10Hz) and 15µV_RMS (10Hz–1kHz) output noise at 3.0V output.

It operates from 3.2V to 12.6V input, maintains 0.003–0.06mV/mA load regulation across –100µA to +15mA, and exhibits 2–30µV/V line regulation. Turn-on settling time is 600µs to ±0.01% of final value with 0.1µF output capacitance.

Key Specifications

Pinout & Package

MAX6133A30+ is supplied in an 8-pin SO (SOICN) package measuring 4.90mm × 3.90mm × 1.75mm (max height), RoHS-compliant, with standard 1.27mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3030AIDBZR and ADR3430ARJZ-R7, MAX6133A30+ delivers 12× tighter tempco and 5× better initial accuracy at lower quiescent current-making it the only option for 14–16-bit portable instrumentation where long-term stability and thermal repeatability are mandatory.

Availability

MAX6133A30+ 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 multi-year production cycles.

Supply support for MAX6133A30+ 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 and mixed-signal ICs for precision, power, and interface applications, with deep expertise in voltage references, data converters, and sensor signal chains.

The MAX6133 family was engineered specifically for portable and communication systems demanding ultra-low power, high accuracy, and minimal board space-leveraging BiCMOS process and post-package trimming to achieve 3ppm/°C tempco in SO and µMAX packages.

FAQ

What is the maximum load current supported by the MAX6133A30+?

The MAX6133A30+ guarantees stable operation with output source currents up to 15mA. Load regulation is specified from –100µA to +15mA, with worst-case deviation of 0.06mV/mA. This allows direct driving of multiple precision DACs or op-amp bias networks without external buffering. Exceeding 15mA may cause dropout or accuracy degradation.

Does the MAX6133A30+ require input or output capacitors for stability?

Yes-the MAX6133A30+ requires a minimum 0.1µF ceramic capacitor on the OUT pin to GND for stability and is stable with output capacitance up to 100µF. An optional 0.1µF ceramic capacitor on the IN pin improves line-transient response. Both capacitors must be placed as close as possible to their respective pins to maintain low-noise performance and prevent oscillation.

What is the thermal hysteresis specification for the MAX6133A30+?

The MAX6133A30+ 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 reflects mechanical stress effects on the bandgap core. It is measured and guaranteed, not typical, and must be included in total error budget for metrology-grade applications.

Can the MAX6133A30+ operate from a 3.3V supply?

Yes-the MAX6133A30+ has a minimum input voltage of 3.2V for 3.0V output, making it fully compatible with standard 3.3V rails. At 3.3V input, dropout margin is 300mV, well above the 200mV max specification. Quiescent current remains ~40µA, and load regulation holds within spec across the full –40°C to +125°C range.

How does the noise performance of the MAX6133A30+ compare to other 3.0V references?

The MAX6133A30+ delivers 24µV_P-P (0.1Hz–10Hz) and 15µV_RMS (10Hz–1kHz) output noise-among the lowest for 3.0V series references in SO packages. This is 2× quieter than REF3030AIDBZR (50µV_P-P) and comparable to higher-cost buried-zener devices, enabling use in 16-bit ADC systems without external filtering.