AD7890AN-10

ADCs/DACs - Special Purpose Overview

The AD7890AN-10 is an 8-channel, 12-bit serial data acquisition system fabricated in LC2MOS technology. It integrates an input multiplexer, track/hold amplifier, ADC, and a 2.5 V reference on a single chip. Operating from a single 5 V supply, it accepts ±10 V analog inputs with a maximum conversion time of 5.9 μs. The device features a high-speed bidirectional serial interface for microcontroller connectivity. DC accuracy includes ±1 LSB relative accuracy and ±2.5 LSB full-scale error. Dynamic performance specifies a minimum Signal to (Noise + Distortion) Ratio of 70 dB at 100 kHz sampling.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 8-channel multiplexer with separate MUX OUT access for external antialiasing filtering
• On-chip 2.5 V voltage reference and track/hold amplifier
• High-speed serial interface supporting self-clocking or external clock modes
• Low power consumption: 30 mW typical in normal mode, 75 μW in standby

ADCs/DACs - Special Purpose Applications

• Industrial process control systems requiring multi-channel signal acquisition
• Data logging equipment with isolated channel requirements
• Microcontroller-based measurement systems needing integrated signal conditioning

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'AN' corresponds to the PDIP-24 package and commercial temperature range (-40°C to +85°C). Confirm RoHS compliance status as historical documentation may vary. Ensure the ordering code matches the -10 variant for ±10 V input ranges. Check current availability through authorized distributors as this component may be subject to lifecycle changes.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7890AN-10 when bipolar ±10 V input signals are required. The 'A' version supports -40°C to +85°C operation; use the 'S' version for extended temperatures up to +125°C. The 'N' suffix indicates a plastic DIP package. If unipolar inputs are needed, consider the AD7890-4 or AD7890-2 variants. Ensure the host microcontroller supports the required serial timing constraints for either master or slave mode operation.

ADCs/DACs - Special Purpose Part Context

The AD7890 belongs to Analog Devices' specialized data acquisition family. It utilizes Linear Compatible CMOS (LC2MOS) technology to combine precision bipolar circuits with low-power CMOS logic. This architecture allows for high-speed conversion while maintaining low power dissipation. The device serves as a complete subsystem, reducing the need for external multiplexers and reference components in standard industrial applications.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements within the same series include the AD7890ARZ-10 (SOIC package) or AD7890SQ-10 (Ceramic DIP). For extended temperature ranges, the AD7890SN-10 is available. Verify that any substitute maintains the 12-bit resolution and ±10 V input range specifications.