AD7890ANZ-2

ADCs/DACs - Special Purpose Overview

The AD7890ANZ-2 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 supports an analog input range of 0 V to 2.5 V with straight binary output coding. The device features a high-speed serial interface, allowing independent access to the multiplexer for external signal conditioning. Key electrical parameters include a maximum conversion time of 5.9 μs, a typical power dissipation of 30 mW in normal mode, and a standby power consumption of 75 μW.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 8-channel multiplexer with separate MUX OUT access for external antialiasing filters
• On-chip 2.5 V voltage reference with external reference input capability
• High-speed bidirectional serial interface compatible with microcontrollers and DSPs
• Low-power operation: 30 mW typical (normal mode) and 75 μW typical (standby mode)

ADCs/DACs - Special Purpose Applications

• Industrial process control systems requiring multi-channel data acquisition
• Data logging equipment with low-power standby requirements
• Embedded measurement systems interfacing with serial digital processors

ADCs/DACs - Special Purpose Procurement Notes

Verify that the specific part number suffix 'ANZ' corresponds to the PDIP-24 package and lead-free compliance as indicated by distributor listings. Confirm the '-2' suffix denotes the 0 V to 2.5 V input range variant. Ensure the source document matches the Rev. C datasheet specifications for timing and accuracy parameters.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7890ANZ-2 when the application requires a unipolar input range of 0 V to 2.5 V. Choose this component over the -4 or -10 variants if the signal levels do not exceed 2.5 V. Consider the separate MUX OUT pin if external filtering is necessary to prevent aliasing across multiple channels.

ADCs/DACs - Special Purpose Part Context

The AD7890 belongs to Analog Devices' specialized data acquisition family. The 'A' version indicates a commercial temperature range of -40°C to +85°C. The 'N' suffix typically denotes a plastic DIP package, while 'Z' indicates lead-free status. This model is part of the broader AD7890 series which includes variants with different input ranges and packages.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should verify compatibility with existing designs if considering alternative 8-channel SAR ADCs.