AD7569JR-REEL

ADCs/DACs - Special Purpose Overview

The AD7569JR-REEL is an 8-bit analog I/O system fabricated in LC2MOS technology, featuring a successive approximation ADC with a 2 μs conversion time and a DAC with a 1 μs output settling time. It integrates a track/hold amplifier, a buffered output amplifier, and a temperature-compensated 1.25 V bandgap reference on a single chip. The device supports unipolar (0 to +1.25 V or 0 to +2.5 V) and bipolar (±1.25 V or ±2.5 V) ranges via the RANGE pin. It utilizes a fast parallel bus interface compatible with standard microprocessors and operates on a single +5 V supply.

ADCs/DACs - Special Purpose Feature Summary

• Complete 8-bit Analog I/O System: Integrates SAR ADC, Track/Hold, DAC, Output Amplifier, and Bandgap Reference.
• Fast Parallel Interface: Bus access and relinquish times under 75 ns; write pulse width under 80 ns.
• Programmable Voltage Ranges: Supports 0–1.25 V, 0–2.5 V, ±1.25 V, and ±2.5 V via RANGE pin configuration.
• LC2MOS Technology: Combines precision bipolar circuits with low-power CMOS logic for high accuracy.

ADCs/DACs - Special Purpose Applications

• Microprocessor-based data acquisition systems requiring integrated analog interfacing.
• Industrial control applications needing precise voltage range selection and fast sampling.
• DSP user applications requiring specified dynamic parameters like SNR and THD.

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'JR' corresponds to the SOIC-24 package and commercial temperature range (0°C to +70°C) as defined in the ordering guide. Confirm that the REEL designation matches the required tape-and-reel packaging format for automated assembly processes.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a single-chip solution for both ADC and DAC functions is required to minimize external component count. Ensure the application can accommodate the 8-bit resolution and the specific input/output voltage ranges supported by the RANGE pin configuration. Verify compatibility with the parallel bus timing requirements of the target microprocessor.

ADCs/DACs - Special Purpose Part Context

The AD7569 is part of the AD7569/AD7669 family of complete analog I/O systems. While the AD7669 variant includes two DAC outputs, the AD7569 provides a single DAC output. The 'JR' suffix indicates the Small Outline (SOIC) package option within the product line.

ADCs/DACs - Special Purpose Replacement Considerations

Direct functional replacements within the same family include other AD7569 variants such as AD7569KN (PDIP) or AD7569BN (PDIP), provided the package footprint and temperature range requirements are met. Cross-model substitution with the AD7669 requires accounting for the dual DAC feature and different pinout.