AD7890BR-10

ADCs/DACs - Special Purpose Overview

The AD7890BR-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 for microcontroller connectivity, drawing 30 mW typically in normal mode and 75 μW in standby. It operates within a temperature range of -40°C to +85°C.

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 DSP and microcontroller ports
• On-chip 2.5 V voltage reference with external reference input capability
• Low power consumption: 30 mW typical (normal mode) and 75 μW typical (standby mode)

ADCs/DACs - Special Purpose Applications

• Industrial process control systems requiring multi-channel signal acquisition
• Data acquisition modules for factory automation and monitoring
• Portable instrumentation powered by single 5 V supplies

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'B' indicates the commercial temperature grade (-40°C to +85°C) and package type against the manufacturer's current ordering guide. Confirm RoHS compliance status as legacy variants may differ. Ensure the required package style (PDIP, SOIC, or CERDIP) matches the design constraints before procurement.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7890BR-10 when bipolar ±10 V input ranges are required. Compare performance against the AD7890ARZ-10 if lead-free PDIP packaging is preferred over the standard B-version package options. Verify that the 117 kS/s sampling rate meets system bandwidth requirements, noting that this rate assumes external clocking mode operation.

ADCs/DACs - Special Purpose Part Context

The AD7890 series belongs to Analog Devices' specialized data acquisition line, utilizing LC2MOS technology to combine precision bipolar circuits with low-power CMOS logic. This architecture enables high-speed conversion while maintaining low power dissipation. The BR-10 variant specifically targets commercial applications requiring robust multi-channel acquisition capabilities.

ADCs/DACs - Special Purpose Replacement Considerations

The AD7890ANZ-10 serves as a direct functional replacement offering identical electrical specifications with a PDIP-24 package. For surface-mount requirements, the AD7890ARZ-10 provides equivalent performance in an SOIC-24 package.