AD7890BNZ-10

ADCs/DACs - Special Purpose Overview

The AD7890BNZ-10 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 ±10 V analog input ranges with a maximum conversion time of 5.9 μs. The device features a high-speed serial interface and draws 50 mW maximum power in normal mode. It is housed in a 24-lead plastic dual-in-line package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 8-channel multiplexer with separate access to MUX OUT for external antialiasing filtering
• High-speed serial interface compatible with microcontrollers and DSP processors
• On-chip 2.5 V voltage reference with external reference input capability
• Low power consumption: 30 mW typical in normal mode, 75 μW typical in standby

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'BNZ' against official Analog Devices documentation to confirm package type and temperature range specifications. Ensure compatibility with the required ±10 V input range variant. Confirm RoHS compliance status for the specific manufacturing lot.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a monolithic solution for 8-channel 12-bit acquisition is needed. The separate MUX OUT pin allows for shared antialiasing filtering across all channels, reducing component count. Ensure the system clock frequency does not exceed 2.5 MHz for specified performance.

ADCs/DACs - Special Purpose Part Context

The AD7890 series includes variants with different input ranges: AD7890-10 (±10 V), AD7890-4 (0 V to 4.096 V), and AD7890-2 (0 V to 2.5 V). The 'N' suffix typically denotes a plastic DIP package, while 'B' indicates the commercial temperature range (-40°C to +85°C).

ADCs/DACs - Special Purpose Replacement Considerations

Direct replacements must match the 8-channel, 12-bit specification and serial interface. Verify pinout compatibility if substituting with other ADC families. Consider thermal performance differences between plastic and ceramic packages.