AD7890ANZ-4

ADCs/DACs - Special Purpose Overview

The AD7890ANZ-4 is an 8-channel, 12-bit data acquisition system fabricated in LC2MOS technology. It integrates a multiplexer, track/hold amplifier, ADC, and 2.5 V reference on a single chip. Operating from a single 5 V supply, it accepts unipolar analog input voltages ranging from 0 V to 4.096 V. The device features a high-speed serial interface with a maximum conversion time of 5.9 μs. It supports both self-clocking and external clocking modes for flexible microcontroller interfacing.

ADCs/DACs - Special Purpose Feature Summary

• 8-channel multiplexer with separate access to MUX OUT for external antialiasing filtering
• Integrated 2.5 V voltage reference and track/hold amplifier
• High-speed bidirectional serial interface compatible with DSP and microcontrollers
• 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 moderate sampling rate requirements
• Embedded measurement systems interfacing via serial ports

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix '4' confirms the 0 V to 4.096 V input range. Confirm package type is PDIP-24 for the ANZ variant. Check RoHS compliance status as indicated by the 'Z' suffix. Ensure operating temperature range matches the A version (-40°C to +85°C).

ADCs/DACs - Special Purpose Selection Notes

Select this part when an 8-channel solution with a single shared antialiasing filter is required. Choose the -4 suffix for unipolar inputs up to 4.096 V. Consider the -10 suffix if bipolar ±10 V inputs are needed. Verify serial interface timing compatibility with the host processor's clock speeds.

ADCs/DACs - Special Purpose Part Context

The AD7890 belongs to Analog Devices' specialized data acquisition family. The AD7890ANZ-4 is the commercial grade, lead-free, plastic DIP version with the 4.096 V input range. It shares the core architecture with the AD7890-10 (bipolar) and AD7890-2 (2.5 V range) variants.

ADCs/DACs - Special Purpose Replacement Considerations

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