AD7890ARZ-2

ADCs/DACs - Special Purpose Overview

The AD7890ARZ-2 is an 8-channel, 12-bit data acquisition system fabricated in LC2MOS technology. It integrates an input multiplexer, track/hold amplifier, ADC, and a 2.5 V reference on a single chip. Operating from a single 5 V supply, this B-version device supports a unipolar analog input range of 0 V to 2.5 V. It features a high-speed serial interface with a maximum conversion time of 5.9 μs. The part operates within a temperature range of -40°C to +85°C and consumes a maximum of 50 mW in normal mode.

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 external reference input capability
• High-speed bidirectional serial interface compatible with microcontrollers and DSPs
• Low power consumption: 50 mW max in normal mode, 75 μW typ in standby

ADCs/DACs - Special Purpose Applications

• Industrial process control systems requiring multi-channel signal acquisition
• Data logging equipment with moderate speed requirements
• Embedded measurement systems interfacing via serial ports

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'ARZ-2' against the manufacturer's current ordering guide to confirm the package type (SOIC) and temperature grade (A version). Ensure the application requires the 0 V to 2.5 V input range associated with the '-2' variant. Cross-reference pinout compatibility if replacing older versions like the AD7890ANZ-2.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7890ARZ-2 when a monolithic solution for eight single-ended channels is required without external multiplexers. The choice depends on the need for a 0 V to 2.5 V input range; other variants exist for ±10 V or 0 V to 4.096 V inputs. Consider the serial interface timing constraints relative to the host processor's clock speed.