AD669AN

Overview

The AD669AN is a monolithic 16-bit DACPORT manufactured on Analog Devices' BiMOS II process, integrating current switches, decoding logic, an output amplifier, a buried Zener reference, and double-buffered latches. It features a parallel 16-bit input interface controlled by CS, L1, and LDAC signals. The device provides pin-programmable unipolar (0 V to +10 V) or bipolar (–10 V to +10 V) voltage outputs. Key electrical parameters include a typical settling time of 8 μs for a full-scale step, a maximum integral nonlinearity of ±1 LSB, and a signal-to-noise ratio of 83 dB. It operates within a temperature range of –40°C to +85°C.

Feature Summary

• Complete 16-bit D/A function with on-chip output amplifier and high-stability buried Zener reference.
• Double-buffered latch structure eliminates data skew errors and enables simultaneous multi-DAC updates.
• Pin-programmable output range selectable between unipolar 0 V to +10 V and bipolar –10 V to +10 V.
• Low glitch impulse of 15 nV-s typical and total harmonic distortion plus noise of 0.009% max.

Applications

• Signal generation applications requiring low THD+N and high SNR.
• Multi-DAC systems requiring synchronized data updates via double-buffered latches.
• Microprocessor interfaces utilizing 16-bit parallel data buses.
• Precision instrumentation requiring 15-bit monotonicity over temperature.

Procurement Notes

Verify the specific grade suffix (AN vs BN) as linearity and gain error specifications differ between grades. Confirm package type matches requirements, as the AN designation indicates a 28-pin plastic DIP. Check for MIL-STD-883 compliance needs, which require ordering the AD669/883B variant instead of standard commercial parts.

Selection Notes

Select the AD669AN when industrial temperature operation (-40°C to +85°C) and plastic DIP packaging are required. Choose the BN grade if tighter linearity specifications (±2 LSB INL/DNL) are necessary compared to the AN grade (±4 LSB). Ensure supply voltages align with the specified ranges: 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.

Part Context

The AD669 belongs to the DACPORT family of complete digital-to-analog converters. The AD669AN is the commercial grade version packaged in a 28-pin plastic DIP. Other variants include the AR/BR for SOIC packages and the SQ for hermetic cerdip packages. Military versions compliant with MIL-STD-883 are available as the AD669/883B.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. For military specifications, refer to the AD669/883B data sheet. No direct cross-model substitutes are listed in the provided documentation.