AD7864ASZ-2REEL

Overview

The AD7864ASZ-2REEL is a high-speed, low-power, 4-channel simultaneous sampling analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features a 12-bit resolution and operates from a single 5 V supply. The device includes four track-and-hold amplifiers with an acquisition time of 0.35 μs and a conversion time of 1.65 μs per channel. It supports input voltage ranges of 0 V to 2.5 V or 0 V to 5 V. The part utilizes a high-speed parallel interface for data transfer and offers power-saving modes with typical standby power consumption of 20 μW.

Feature Summary

• Four simultaneously sampled inputs preserve relative phase information across channels.
• Hardware or software selectable channel sequence allows conversion of any subset of the four channels.
• Integrated 2.5 V reference and on-chip clock oscillator simplify system design.
• Overvoltage protection on analog inputs prevents damage from excessive signal levels.

Applications

• AC motor control systems
• Uninterrupted power supplies (UPS)
• Data acquisition systems
• Communications equipment

Procurement Notes

Verify that the ordering suffix 'REEL' indicates tape-and-reel packaging rather than tray packaging when placing orders. Confirm the specific version suffix matches the required input range specifications. Ensure compatibility with the intended processor interface voltage levels before finalizing procurement.

Selection Notes

Select this component for applications requiring simultaneous sampling of four channels with 12-bit precision. Choose the AD7864-2 variant specifically for unipolar input requirements of 0 V to 2.5 V or 0 V to 5 V. Consider the internal clock speed and parallel interface timing constraints when designing the host microprocessor or DSP connection.

Part Context

The AD7864 series comprises four-channel simultaneous sampling ADCs available in different input range versions. The AD7864-1 supports ±10 V and ±5 V ranges, while the AD7864-3 supports ±2.5 V. The AD7864-2 variant is designed for unipolar applications. All variants share the same core architecture and package options.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material. Consult official documentation for potential cross-references or updated revisions within the AD7864 family.