-AD01-D-Analog-to-Digital Conversion Subsystem Engineering Drawings 1971

This document is the engineering drawing and specifications manual for the Digital Equipment Corporation (DEC) AD01-D analog-to-digital (A/D) conversion subsystem, published in 1971 for use with the PDP-11 computer.

The AD01-D is described as a 10-bit A/D converter featuring an extended dynamic range with programmable gain (1, 2, 4, or 8) and a single-ended multiplexer capable of supporting up to 32 input channels (expandable to 64). It interfaces with the PDP-11 via dedicated Control and Status Registers (ADCS) and a Data Buffer (ADDB), allowing for software control of channel selection, gain, and operating modes (interrupting or non-interrupting). Optional features include a Sample & Hold Amplifier (AH04) and an 11-bit A/D converter with sign (AH05). Conversion time is specified at approximately 22 microseconds (29 microseconds with the AH05 option).

The document provides a comprehensive engineering package, including:

• Master drawing lists, parts lists, and wire lists.
• Detailed circuit schematics for the multiplexer, interface, A/D converter, and power supplies.
• Wired assembly diagrams and module utilization layouts.
• Extensive engineering specifications covering general descriptions, performance (accuracy, speed, noise), power requirements, and environmental conditions.
• A detailed acceptance procedure outlining various diagnostic tests and calibration steps to verify the subsystem's functionality and adherence to specifications.