AD667JP

Overview

The AD667JP is a 12-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It utilizes an R-2R architecture and features a buffered voltage output in a 28-pin PLCC package. The device operates on dual power supplies ranging from ±11.4 V to ±16.5 V, with typical supply currents of 8 mA for positive and 20 mA for negative rails. Key performance metrics include a maximum settling time of 4 µs to ±0.01% of full scale and a slew rate of 10 V/µs. Linearity error is specified at ±1/2 LSB over the commercial temperature range of 0°C to +70°C.

Feature Summary

• 12-bit resolution with guaranteed monotonicity over the full operating temperature range
• Internal low-noise buried Zener reference providing 9.90 V to 10.10 V output
• Double-buffered input structure with four independently addressable first-rank registers
• TTL-compatible digital inputs allowing direct interface with standard logic families

Applications

• Microprocessor-controlled data acquisition systems requiring 12-bit precision
• Programmable gain amplifier circuits utilizing offset binary coding
• Industrial process control loops needing bipolar or unipolar voltage outputs
• Test and measurement equipment requiring stable analog signal generation

Procurement Notes

Verify component authenticity through authorized distributors as the AD667JP is listed as obsolete. Confirm that the PLCC package matches the target PCB footprint. Check for lead-free alternatives such as the AD667JPZ if environmental compliance is required. Ensure power supply decoupling capacitors are placed close to the pins to maintain signal integrity during operation.

Selection Notes

Select the AD667JP when a 12-bit DAC with internal buffering and reference is needed for commercial temperature applications. Compare settling times against system requirements; the 4 µs max time suits moderate-speed applications. Consider the AD667KP variant if tighter linearity specifications (±1/4 LSB) are necessary. Verify that the parallel interface logic levels match the driving microcontroller outputs.

Part Context

The AD667 series comprises laser-trimmed monolithic DACs designed for high accuracy. The 'J' suffix denotes the commercial temperature grade (0°C to +70°C) with ±1/2 LSB linearity. The 'P' suffix indicates the Plastic Leaded Chip Carrier package. This part belongs to a family that includes ceramic DIP and extended temperature variants like the AD667SD.

Replacement Considerations

The AD667JPZ is a confirmed direct substitute offering identical electrical characteristics and pinout compatibility. Both parts share the same 28-PLCC package and functional specifications. Verify that the replacement source provides equivalent quality assurance documentation.