MAX125CEAX+D

ADCs/DACs - Special Purpose Overview

The MAX125CEAX+D is a high-speed, multichannel, 14-bit data-acquisition system (DAS) featuring four simultaneous-sampling track/hold amplifiers. It integrates a successive-approximation ADC with a 3µs conversion time per channel and an internal +2.5V reference. The device supports ±5V analog supplies and offers fault-protected inputs tolerant to ±17V. It provides eight single-ended inputs via two multiplexed channels per T/H amplifier. The datasheet specifies a throughput of 250ksps for single-channel operation, decreasing to 76ksps for four-channel mode. Integral nonlinearity is ±4 LSB, and the signal-to-noise ratio is 75 dB.

ADCs/DACs - Special Purpose Feature Summary

• Four simultaneous-sampling track/hold amplifiers with two multiplexed inputs each, totaling eight single-ended inputs.
• Internal microsequencer allows programming for one to four channels per CONVST pulse.
• High-speed parallel DSP interface compatible with most popular digital signal processors without wait states.
• Fault-protected input multiplexer tolerant to ±17V overvoltage conditions.

ADCs/DACs - Special Purpose Applications

• Multiphase motor control
• Power-grid synchronization
• Power-factor monitoring
• Digital signal processing
• Vibration and waveform analysis

ADCs/DACs - Special Purpose Procurement Notes

Verify the component matches the specific extended temperature range (-40°C to +85°C) indicated by the 'E' suffix in the part number MAX125CEAX+D. Confirm the package type is SSOP-36 as specified in the ordering information. Ensure the application requires the ±5V input range characteristic of the MAX125 variant rather than the ±2.5V range of the MAX126.

ADCs/DACs - Special Purpose Selection Notes

Select this component when simultaneous sampling of multiple channels is required to preserve relative phase information. The MAX125CEAX+D is suitable for applications needing up to 250ksps throughput on a single channel or lower aggregate rates across multiple channels. Consider the internal reference if external precision references are not available, noting that external references may improve accuracy over wide temperature ranges.

ADCs/DACs - Special Purpose Part Context

This part belongs to the MAX125/MAX126 family of 14-bit data-acquisition systems. The MAX125 variant features a ±5V input range, while the MAX126 variant supports ±2.5V. Both share identical architecture, including the SAR ADC, simultaneous T/Hs, and programmable sequencer. The CEAX suffix denotes the commercial/extended temperature grade and SSOP packaging.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX125CCAX is a direct replacement for the same electrical specifications but operates within the 0°C to +70°C temperature range instead of -40°C to +85°C. No other cross-model substitutes are documented in the provided datasheet.