AD667AD

Overview

The AD667AD is a 12-bit digital-to-analog converter (DAC) from Analog Devices, housed in a 28-pin Ceramic DIP package. It features an internal reference and buffered voltage output with a typical settling time of 3 µs to ±0.01% FSR. The device operates on dual power supplies ranging from ±11.4 V to ±16.5 V, consuming 8 mA on the positive rail and 20 mA on the negative rail at +25°C. It supports parallel data interfaces via four address lines for double-buffered loading. The AD667AD guarantees monotonicity over its specified temperature range and offers linearity errors of ±1/2 LSB at +25°C.

Feature Summary

• 12-bit resolution with laser-trimmed accuracy and guaranteed monotonicity
• Internal low-noise buried Zener reference requiring no external components
• Double-buffered architecture prevents spurious output during updates
• Configurable bipolar (±10V, ±5V, ±2.5V) or unipolar (0-10V, 0-5V) output ranges

Applications

• Microprocessor-compatible analog signal generation
• Industrial process control systems requiring precise voltage references
• Test and measurement equipment needing stable DAC outputs
• Programmable power supply regulation circuits

Procurement Notes

Verify the specific suffix 'AD' indicates the commercial temperature grade (-25°C to +85°C) and ceramic DIP packaging. Confirm RoHS compliance status as historical datasheets may list non-compliant variants. Check for end-of-life status or military-grade alternatives like the AD667/883B if extended reliability is required. Ensure power supply decoupling capacitors are placed close to the analog ground pin for optimal performance.

Selection Notes

Select the AD667AD when a ceramic package is preferred for hermetic sealing or high-temperature stability over plastic variants. Choose this model if the application requires the -25°C to +85°C operating range. Compare linearity specifications against the AD667BD if tighter integral nonlinearity (±1/4 LSB) is needed. Ensure the system can provide the required ±12V or ±15V dual supplies, as single-supply operation is not supported.

Part Context

The AD667 series represents a family of high-performance 12-bit DACs designed for microprocessor interfacing. The AD667AD specifically denotes the ceramic DIP version within the J, K, A, B, S, and SE grades. It shares core architectural features with other members but differs in thermal range and physical package. The series is known for its true 12-bit performance without missing codes across the full temperature spectrum.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified local source material.