MAX1270BEAI+

ADCs/DACs - Special Purpose Overview

The MAX1270BEAI+ is a multirange, 12-bit data acquisition system (DAS) from Analog Devices/Maxim Integrated. It operates on a single +5V supply while accepting analog input signals spanning above the rail and below ground. The device features eight software-programmable analog input channels with selectable ranges of ±10V, ±5V, 0 to +10V, or 0 to +5V. It utilizes a successive approximation register (SAR) architecture with a throughput rate of 110ksps. The component includes an internal 4.096V reference or supports external references, offers ±16.5V overvoltage tolerance, and communicates via a serial interface compatible with SPI/QSPI and MICROWIRE protocols.

ADCs/DACs - Special Purpose Feature Summary

• 12-Bit Resolution with 0.5 LSB Integral Nonlinearity (INL)
• +5V Single-Supply Operation with ±16.5V Overvoltage-Tolerant Inputs
• Eight Analog Input Channels with Four Software-Selectable Ranges
• 110ksps Sampling Rate with Internal/External Clock Options

ADCs/DACs - Special Purpose Applications

• Industrial Control Systems
• Data-Acquisition Systems
• Battery-Powered Instruments
• Automatic Testing Equipment
• Medical Instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature range (-40°C to +85°C) compared to the commercial grade. Confirm package type is SSOP-28. Check for RoHS compliance status as indicated in distributor listings. Ensure the ordering suffix matches the required thermal performance for the target application environment.

ADCs/DACs - Special Purpose Selection Notes

Select this model when bipolar input ranges up to ±10V are required on a single +5V supply. The MAX1270 differs from the MAX1271 by its fixed voltage ranges rather than VREF-dependent ranges. Choose the BEAI+ variant for industrial temperature operation (-40°C to +85°C). Ensure the host microcontroller supports the required serial interface timing for SPI or MICROWIRE compatibility.

ADCs/DACs - Special Purpose Part Context

The MAX1270BEAI+ belongs to the MAX1270B series of multirange ADCs. It is functionally similar to the MAX1270AEAI+ but offers higher sampling rates (110ksps vs 100ksps). The 'B' suffix denotes the speed grade, while 'E' indicates the extended temperature range. It replaces older commercial grade parts like the MAX1270ACAI+ in industrial applications requiring wider thermal tolerance.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX1270AEAI+ is a direct functional substitute with identical pinout and specifications, except for a lower maximum sampling rate of 100ksps. Both share the same SSOP-28 package and serial interface requirements.