AD7890BN-10

ADCs/DACs - Special Purpose Overview

The AD7890BN-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, the -10 variant accepts ±10 V analog inputs. The device features a high-speed serial interface and achieves a maximum conversion time of 5.9 μs with a typical power dissipation of 30 mW in normal mode. It supports external clocking or self-clocking modes for flexible microcontroller interfacing.

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 with option for external reference input
• High-speed bidirectional serial interface compatible with DSP and microcontroller ports
• Low-power operation: 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 factory automation and monitoring
• Portable instrumentation powered by single 5 V supplies
• Vibration and acoustic measurement systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'BN' against the manufacturer's current ordering guide to confirm package type and temperature range availability. Confirm RoHS compliance status as older manufacturing runs may differ. Ensure the design accommodates the required 5 V logic levels and serial timing constraints defined in the datasheet.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7890BN-10 when bipolar ±10 V input ranges are required. Compare the B version specifications (±0.5 LSB relative accuracy) against the A version if higher linearity is needed. Verify that the 24-lead package format matches the PCB footprint requirements and that the operating temperature range meets the application environment.

ADCs/DACs - Special Purpose Part Context

The AD7890 belongs to Analog Devices' specialized data acquisition family. The -10 suffix denotes the ±10 V input range capability. The 'B' grade typically indicates tighter DC accuracy specifications compared to the 'A' grade. This component serves as a complete subsystem replacement for discrete multiplexer and ADC designs.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements within the same series include the AD7890AN-10 (PDIP package) and AD7890AR-10 (SOIC package). Verify that the substitute part number shares the identical 'B' performance grade and '-10' input range specification before integration.