AD7569AQ

Specialized Overview

The AD7569AQ is a complete, monolithic 8-bit analog I/O system fabricated in Linear-Compatible CMOS technology. It integrates a high-speed successive approximation ADC with a 2 μs conversion time and a track/hold circuit featuring a 200 kHz bandwidth. The device also includes an 8-bit DAC with an output buffer amplifier that settles within 1 μs. A temperature-compensated 1.25 V bandgap reference provides precision for both converters. The part supports single or dual 5 V supplies, enabling unipolar (0 to +1.25 V/+2.5 V) or bipolar (±1.25 V/±2.5 V) ranges via the RANGE pin. Digital interfacing utilizes an 8-bit I/O port compatible with standard microprocessor control lines.

Specialized Feature Summary

• Integrates ADC, DAC, track/hold, and bandgap reference on a single chip
• Features fast bus interface timing compatible with modern microprocessors
• Supports programmable unipolar and bipolar analog input/output ranges
• Includes on-chip temperature-compensated voltage reference

Specialized Applications

• Microprocessor-based data acquisition systems
• Industrial process control loops
• Automotive instrumentation interfaces
• Portable battery-powered measurement devices

Specialized Procurement Notes

Verify the specific suffix AQ indicates the industrial temperature range of -40°C to +85°C and the Q-24 ceramic DIP package. Confirm the revision level matches the required datasheet specifications. Ensure ESD precautions are observed during handling as the device is sensitive to electrostatic discharge. Check for military processing requirements if applicable by adding the /883B suffix.

Specialized Selection Notes

Select the AD7569AQ when a single-chip solution for 8-bit analog I/O is required with fast conversion speeds. Choose this model over the AD7669 if only one DAC output is needed. Consider the extended temperature version (AD7569SQ) if operation beyond +85°C is necessary. Verify that the 8-bit resolution meets the system accuracy requirements before finalizing the design.

Specialized Part Context

The AD7569 is part of the Analog Devices AD7569/AD7669 family of complete analog I/O systems. The AD7569 variant features a single DAC output, whereas the AD7669 includes two DACs. Both share the same ADC core and digital interface architecture. This family is designed to simplify microprocessor-to-analog interfacing by eliminating external components typically required for reference, buffering, and logic translation.

Specialized Replacement Considerations

Public confirmed substitute part numbers: AD7569BN, AD7569BR, AD7569BQ.