AD7569JN

ADCs/DACs - Special Purpose Overview

The AD7569JN is an 8-bit analog I/O system on a single monolithic chip, fabricated in Linear-Compatible CMOS (LC2MOS). It integrates a high-speed successive approximation ADC with a 2 μs conversion time and track/hold, alongside a DAC with an output buffer amplifier featuring a 1 μs settling time. A temperature-compensated 1.25 V bandgap reference supports both converters. The device operates on single or dual 5 V supplies, supporting 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.

ADCs/DACs - Special Purpose Feature Summary

• Complete 8-bit analog I/O system integrating ADC, DAC, track/hold, and bandgap reference on one chip
• Fast bus interface with bus access/relinquish times under 75 ns and write pulse width under 80 ns
• Programmable analog input/output ranges: 0 to +1.25 V, 0 to +2.5 V, ±1.25 V, or ±2.5 V
• TTL/CMOS compatible logic inputs and outputs with internal ESD protection

ADCs/DACs - Special Purpose Applications

• Microprocessor-based data acquisition systems
• Industrial process control loops
• Distributed control systems (DCS)
• Programmable logic controller (PLC) modules

ADCs/DACs - Special Purpose Procurement Notes

Verify the suffix 'JN' corresponds to the commercial temperature range (0°C to +70°C) and 24-pin plastic DIP package. Confirm RoHS compliance status as historical datasheets may list non-compliant variants. Ensure supply voltage requirements (+5V ±5%) match the application design constraints for specified performance.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7569JN for applications requiring a single-chip solution for 8-bit analog input and output without external components. Choose this variant over the AD7669 if only a single DAC output is needed. Verify that the 2 μs ADC conversion time and 1 μs DAC settling time meet the system's speed requirements. Ensure the 8-bit resolution is sufficient for the required accuracy.

ADCs/DACs - Special Purpose Part Context

The AD7569/AD7669 series represents a complete analog I/O solution designed to simplify microprocessor interfacing. The AD7569 provides a single DAC output, while the AD7669 offers dual DACs. Both share the same ADC and reference architecture. The 'J' grade indicates commercial temperature operation, and 'N' denotes the 24-pin plastic DIP package.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.