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Overall Description:

This document describes the Analog Devices AD7824 and AD7828, which are multichannel Analog-to-Digital Converters (ADCs) using a multiplexer architecture. They's designed for cost-effective, compact systems needing to sample multiple analog signals.

Key Features & Specifications:

️· Channels:
- AD7824: 4 channels
- AD7828: 8 channels (includes an extra address line - A2)
️· Conversion Speed: 2.5 microseconds per channel.
️· Sampling Frequency:
- AD7824: 100 kHz per channel
- AD7828: 50 kHz per channel
️· Track-and-Hold: Built-in track-and-hold circuitry allows for handling signals up to 10 kHz bandwidth.
️· Accuracy: Tight total unadjusted error specification and good channel-to-channel matching, minimizing the need for user calibration.
️· Power Supply: Single 5V supply simplifies power requirements.
️· Digital Interface: Fast and easy to connect to microprocessors. Requires minimal external components (no clock signal needed).
️· Address Lines: A0, A1, A2 (A2 only for AD7828)

Product Highlights:

1. Multichannel System: Provides a cost-effective, space-saving way to build systems needing to sample multiple analog signals.
2. Fast Conversion Rate: Rapid sampling.
3. Track-and-Hold: Facilitates high-frequency signal acquisition.
4. Accuracy: Minimizes calibration needs.
5. Simple Power: Easy power supply setup.
6. Easy Interface: Simple and flexible connection to microprocessors.

In essence, these ADCs offer a complete solution for acquiring data from multiple analog sources in a compact and efficient manner.