AD7890ARZ-2REEL

ADCs/DACs - Special Purpose Overview

The AD7890ARZ-2REEL is an 8-channel, 12-bit serial data acquisition system fabricated in LC2MOS technology. It integrates an input multiplexer, track/hold amplifier, SAR ADC, and a 2.5 V reference on a single chip. Operating from a single 5 V supply, the device supports an analog input range of 0 V to 2.5 V. Key electrical parameters include a maximum conversion time of 5.9 μs, a typical power dissipation of 30 mW in normal mode, and 75 μW in standby. The unit features a high-speed bidirectional serial interface and is housed in a 24-lead SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 8-channel multiplexer with separate access to MUX OUT for external antialiasing filtering
• On-chip 2.5 V voltage reference and track/hold amplifier
• High-speed serial interface compatible with microcontrollers and DSPs
• Low-power operation with 30 mW typical consumption and 75 μW standby mode

ADCs/DACs - Special Purpose Applications

• Industrial process control systems requiring multi-channel signal acquisition
• Data acquisition modules for remote monitoring stations
• Embedded measurement systems interfacing with digital signal processors

ADCs/DACs - Special Purpose Procurement Notes

Verify that the specific suffix '2' corresponds to the 0 V to 2.5 V unipolar input range variant. Confirm the REEL designation indicates tape-and-reel packaging suitable for automated surface-mount assembly. Ensure the A version meets the required -40°C to +85°C commercial temperature operating range.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a monolithic solution for eight single-ended channels is required without external multiplexers. The AD7890-2 variant is appropriate for low-voltage signals within the 0 V to 2.5 V window. Designers must account for the 5.9 μs conversion time and 2 μs acquisition time when determining maximum sampling rates per channel.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7890 family of data acquisition systems. Variants are distinguished by input ranges: AD7890-10 for ±10 V, AD7890-4 for 0 V to 4.096 V, and AD7890-2 for 0 V to 2.5 V. All variants share identical architecture, pinouts, and performance characteristics regarding speed and linearity.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.