AD569SD

Overview

The AD569SD 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 the specified temperature range. The device includes double-buffered input latches, on-chip buffer amplifiers, and supports both unipolar and bipolar reference inputs. Designed for extended industrial environments, it operates from -55°C to +125°C in a 28-pin ceramic DIP package. Key electrical characteristics include a typical settling time of 3 μs to ±0.001% for a full-scale step, low drift, and low noise performance suitable for high-precision applications.

Feature Summary

• Guaranteed 16-bit monotonicity ensured by voltage-segmented architecture
• Extended operating temperature range from -55°C to +125°C
• 3 μs typical settling time to within ±0.001% for a full-scale step
• On-chip high-speed buffer amplifiers with 1000 pF capacitive load drive capability

Applications

• Robotics systems requiring precise analog control
• Closed-loop positioning applications
• High-resolution ADC subranging architectures
• Microprocessor-based process control systems

Procurement Notes

Verify the specific grade suffix SD to confirm the extended temperature rating of -55°C to +125°C and the 28-pin ceramic DIP package. Ensure power supply voltages remain within the ±10.8 V to ±13.2 V range to maintain specified linearity and performance metrics. Confirm interface compatibility with the required 8-bit or 16-bit bus architecture before integration.

Selection Notes

Select the AD569SD when operation beyond standard industrial temperatures (-25°C to +85°C) is required. This model provides the same 16-bit resolution and parallel interface as lower-grade versions but offers enhanced thermal stability. Consider the external reference requirements and Kelvin connection needs for high-accuracy applications to minimize gain and offset errors caused by wiring resistances.

Part Context

The AD569SD belongs to the AD569 family of 16-bit DACs, which also includes commercial (JN/KN) and industrial (AD/BD) grades. While JN and KN versions use plastic packages and operate from 0°C to +70°C, and AD/BD versions use ceramic packages for -25°C to +85°C, the SD variant is specifically screened for the -55°C to +125°C range. All variants share the same core BiMOS II construction and functional block diagram.

Replacement Considerations

Direct replacements within the same family include the AD569AD or AD569BD for applications not requiring the -55°C lower limit. For military specifications, verify availability against MIL-STD-883 compliant versions listed in the Analog Devices Military Products Databook. Ensure any substitute maintains the 28-pin CDIP footprint and parallel interface timing requirements.

FAQ

What is the maximum capacitive load the AD569SD can drive?

The on-chip output buffer amplifier can drive capacitive loads of up to 1000 pF without loss of stability.

How does the AD569SD ensure monotonicity?

Monotonicity is guaranteed by its voltage-segmented architecture, where buffer amplifiers leap-frog up the first resistor string to preserve accuracy at segment boundaries regardless of amplifier offset voltages.

What is the typical digital-to-analog glitch impulse for this device?

The typical glitch impulse is 500 nV-sec, measured with the reference connections tied to ground during worst-case transitions.