AD660AN

Overview

The AD660ANZ is a monolithic 16-bit digital-to-analog converter manufactured by Analog Devices Inc. in a 24-lead plastic DIP package. It integrates an on-chip buried Zener voltage reference, double-buffered latches, and an output amplifier. The device supports serial or byte input interfaces and offers pin-programmable unipolar (0 V to 10 V) or bipolar (−10 V to +10 V) output ranges. Key electrical specifications include ±1 LSB integral nonlinearity, 15-bit monotonicity over temperature, and a typical output settling time of 8 μs for a full-scale step.

Feature Summary

• Complete 16-bit DAC with integrated 10 V buried Zener reference and output amplifier
• Pin-selectable unipolar (0–10 V) or bipolar (±10 V) output configurations
• Flexible digital interface supporting serial (SPI/Microwire compatible) or dual-byte loading
• Double-buffered latches enable simultaneous multi-DAC updates without data skew

Applications

• Precision industrial process control systems
• High-resolution instrumentation and test equipment
• Motor control applications requiring precise analog signal generation
• Data acquisition systems utilizing daisy-chained DAC architectures

Procurement Notes

Verify the specific suffix 'AN' corresponds to the 24-lead plastic DIP package and the −40°C to +85°C operating temperature range. Confirm RoHS compliance status as required by project specifications. Ensure supply voltages match the specified +VCC (+13.5 V to +16.5 V), −VEE (−13.5 V to −16.5 V), and +VLL (+4.5 V to +5.5 V) requirements for proper operation.

Selection Notes

Select the AD660ANZ when a complete 16-bit solution with an internal reference is required to minimize external component count. Choose this part for applications needing pin-programmable output spans without external resistors. Consider the double-buffered latch structure if simultaneous updating of multiple channels is necessary. Verify that the SPI or Microwire interface timing meets the microprocessor system constraints.

Part Context

The AD660 belongs to the DACPORT family of monolithic data converters. The AN grade specifically denotes the plastic DIP variant rated for commercial/industrial temperatures. Other variants include the AR (SOIC), BN/BR (improved linearity grades), and SQ (ceramic/military). This component represents a legacy high-precision BiMOS II technology design offering robust performance in demanding analog environments.

Replacement Considerations

Direct pin-compatible replacements are limited due to the specific integration level. Review the AD660BN for improved linearity specifications within the same package. For modern alternatives, consider higher-speed or lower-power DACs from the manufacturer, though architectural differences may require schematic redesign.