AD569BD

Overview

The AD569BD is a monolithic 16-bit digital-to-analog converter manufactured using Analog Devices' BiMOS II process. It features a voltage-segmented architecture that guarantees 16-bit monotonicity over temperature and time. The device includes double-buffered input latches, selector switches, and on-chip high-speed buffer amplifiers. It supports both 8-bit and 16-bit bus interfaces via TTL/LSTTL/5V CMOS-compatible control signals (CS, LBE, HBE, LDAC). The AD569BD operates within an industrial temperature range of –25°C to +85°C and is housed in a 28-pin ceramic DIP package.

Feature Summary

• Guaranteed 16-bit monotonicity ensured by voltage-segmented architecture
• Integral nonlinearity of ±0.024% typical at +25°C; differential nonlinearity of ±1/4 LSB typical
• Output settling time of 3 μs typical to ±0.001% for a full-scale step with no load
• Double-buffered input structure allows asynchronous loading and simultaneous updates of multiple DACs

Applications

• Robotics systems requiring precise motion control
• Closed-loop positioning applications
• High-resolution analog-to-digital converter front-ends
• Microprocessor-based process control systems

Procurement Notes

Verify the specific grade suffix BD indicates the industrial temperature range (-25°C to +85°C) and 28-pin ceramic DIP package. Confirm that the ordering part number matches the required linearity specifications, as other grades like JN or SD offer different performance and environmental ratings. Ensure ESD precautions are observed during handling due to the device's sensitivity.

Selection Notes

Select the AD569BD when industrial temperature operation is required alongside high precision. The BD grade offers improved integral nonlinearity (±0.024%) compared to the AD grade (±0.04%). Consider the need for Kelvin reference connections to minimize gain errors caused by wiring resistances. Verify that the system power supplies can accommodate the ±10.8 V to ±13.2 V range specified for optimal reference voltage operation.

Part Context

The AD569 series comprises several grades differentiated by temperature range and linearity accuracy. The AD569BD belongs to the industrial grade family, sharing the same core BiMOS II technology and 16-bit resolution as the commercial (J/K) and extended (SD) variants. All versions utilize the same 28-pin pinout but differ in packaging materials and operational limits.

Replacement Considerations

Direct replacements must match the 16-bit resolution, 28-pin ceramic DIP package, and industrial temperature range. Verify compatibility with existing control logic levels (TTL/LSTTL/5V CMOS). Note that newer generations may require software or hardware adjustments due to differences in settling times or glitch impulse characteristics.