MAX199AEWI+

ADCs/DACs - Special Purpose Overview

The MAX199AEWI+ is a multi-range, 12-bit data-acquisition system (DAS) from Analog Devices/Maxim Integrated. It operates on a single +5V supply and converts analog signals up to ±4V across eight independently programmable input channels. The device supports ranges of ±VREF, ±VREF/2, 0V to VREF, or 0V to VREF/2, effectively increasing dynamic range to 14 bits. Key specifications include a 100ksps throughput rate, 6µs conversion time, and fault protection for inputs up to ±16.5V. It features an internal 4.096V reference or external reference capability, two power-down modes, and a TTL/CMOS compatible 8+4 parallel interface.

ADCs/DACs - Special Purpose Feature Summary

• 12-Bit Resolution with 1/2 LSB Integral Nonlinearity
• Software-Selectable Input Ranges: ±VREF, ±VREF/2, 0V to VREF, 0V to VREF/2
• Fault-Protected Input Multiplexer rated for ±16.5V
• Single +5V Supply Operation with Internal 4.096V Reference

ADCs/DACs - Special Purpose Applications

• Industrial-Control Systems
• Data-Acquisition Systems
• Automatic Testing Systems
• Medical Instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'EWI+' against the manufacturer's current ordering guide to confirm package type (Wide SOIC) and temperature grade (Commercial, 0°C to +70°C). Ensure compatibility with existing PCB footprints for the 28-pin Wide SO package. Check for RoHS compliance status as indicated in the latest datasheet revisions.

ADCs/DACs - Special Purpose Selection Notes

Select this component when interfacing sensors requiring multiple voltage ranges (e.g., 4mA-to-20mA, ±12V, ±15V) within a single +5V system. The software-programmable gain and range selection allow flexibility without hardware changes. Ensure the microprocessor interface timing matches the TTL/CMOS compatible three-state data I/O requirements.

ADCs/DACs - Special Purpose Part Context

The MAX199A series belongs to Maxim Integrated's family of multi-range data acquisition systems. The 'E' suffix denotes the commercial temperature range (0°C to +70°C), while 'W' indicates the Wide SOIC package. This part is distinct from the MAX197/MAX198 which offer different input range combinations or bus interfaces.

ADCs/DACs - Special Purpose Replacement Considerations

For alternative input ranges such as ±10V, ±5V, 0V to 10V, or 0V to 5V, consult the MAX197 datasheet. For 12-bit ADCs with different bus interface requirements, refer to the MAX196 or MAX198 documentation.