AD7890ARZ-10

ADCs/DACs - Special Purpose Overview

The AD7890ARZ-10 is an 8-channel, 12-bit serial data acquisition system fabricated in LC2MOS technology. It integrates an input multiplexer, track/hold amplifier, high-speed ADC, and a 2.5 V reference on a single chip. Operating from a single 5 V supply, the AD7890-10 variant supports an analog input range of ±10 V. The device features a maximum conversion time of 5.9 μs and typical power dissipation of 30 mW in normal mode. It provides separate access to the multiplexer output for external signal conditioning and utilizes a flexible serial interface for microcontroller or DSP connectivity.

ADCs/DACs - Special Purpose Feature Summary

• Complete 12-bit Data Acquisition System-on-a-Chip with integrated 8-channel multiplexer, track/hold amplifier, and 2.5 V reference
• ±10 V analog input voltage range with 20 kΩ minimum input resistance
• High-speed serial interface supporting self-clocking (master) and external clocking (slave) modes
• Separate MUX OUT pin allows connection of a single external antialiasing filter for all channels

ADCs/DACs - Special Purpose Applications

• Multi-axis digital control systems requiring efficient multi-channel A/D conversion
• Industrial process control and automation data acquisition
• Embedded systems interfacing with microcontrollers or DSP processors via serial ports

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'ARZ' against the manufacturer's current ordering guide to confirm package type (SOIC_W) and lead-free status. Confirm that the '-10' designation matches the required ±10 V input range specification for the application. Check for availability of the Rev. C datasheet to ensure accurate timing and electrical parameter compliance.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7890ARZ-10 when an 8-channel multiplexed input with a ±10 V range is required. Ensure the design accommodates the 5 V single-supply requirement and the 2.5 V internal reference. Consider the separate MUX OUT pin if external antialiasing filtering is necessary to reduce component count compared to per-channel filtering solutions.

ADCs/DACs - Special Purpose Part Context

The AD7890 belongs to Analog Devices' specialized data acquisition ADC family. The 'A' version indicates a commercial temperature range of -40°C to +85°C. The 'RZ' suffix typically denotes a 24-lead SOIC_W package with RoHS compliance. Other variants include the AD7890-4 (0 V to 4.096 V range) and AD7890-2 (0 V to 2.5 V range).

ADCs/DACs - Special Purpose Replacement Considerations

Direct functional replacements within the same series include the AD7890-4 and AD7890-2, provided the input voltage range difference is acceptable. For different packages, verify pin compatibility between PDIP, CERDIP, and SOIC_W versions.