MAX6070BAUT12+T

Overview

The MAX6070BAUT12+T is a low-noise, high-precision series voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output of 1.25V with an initial accuracy of ±0.08% and a maximum temperature drift of 8ppm/°C. The device operates within a supply voltage range of 2.7V to 5.5V, consuming a typical quiescent current of 200µA. It supports up to 10mA of load current in both sourcing and sinking modes. The component is housed in a compact 6-pin SOT-23 package and is specified for operation across the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Offers low noise performance with a 1/f noise voltage of 6µVP-P (0.1Hz to 10Hz) at the 1.25V output level.
• Features a dedicated filter input pin that allows connection of an external capacitor to reduce high-frequency noise for wideband applications.
• Includes an enable control pin that facilitates power-down functionality, reducing supply current to 6µA when disabled.

Applications

• High-accuracy industrial and process control systems
• Precision instrumentation equipment
• High-resolution ADCs and DACs
• Precision current sources

Procurement Notes

Verify the specific suffix 'AUT12' confirms the 1.25V output voltage and B-grade accuracy. Confirm the 'SOT-23' package code matches the required footprint. Ensure the '+T' designation aligns with the reel packaging format needed for assembly. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and revision status.

Selection Notes

Select this component when a stable 1.25V reference is required with tight tolerance specifications. The B-grade variant offers ±0.08% accuracy suitable for general precision tasks. Consider the MAX6071 if Kelvin sensing (GNDS/GNDF pins) is necessary to eliminate trace resistance errors. Evaluate the filter pin utility if system bandwidth requires additional high-frequency noise suppression beyond standard bypassing.

Part Context

This device belongs to the MAX6070/MAX6071 family of low-noise, high-precision series voltage references. The MAX6070 variant includes a filter pin for noise reduction, whereas the MAX6071 adds force/sense outputs for improved regulation under varying load conditions. Both families share similar electrical characteristics and are designed for space-constrained, high-performance analog applications.

Replacement Considerations

MAX6070AAUT12+T: Offers tighter accuracy (±0.04%) and lower drift (6ppm/°C max).

FAQ

How does the filter pin affect the device's startup time?

Connecting a capacitor to the filter pin increases the turn-on settling time significantly compared to leaving it unconnected. For example, with a 0.1µF filter capacitor, the settling time to 0.01% is approximately 6.1ms, whereas without it, the time is roughly 21µs.

What is the difference between the MAX6070 and MAX6071 regarding grounding?

The MAX6070 has a single ground pin (GND), while the MAX6071 features separate Ground Force (GNDF) and Ground Sense (GNDS) pins. The GNDS pin allows for Kelvin sensing to compensate for voltage drops in ground traces, improving accuracy under load.