AD7828KP

Overview

The AD7828KP is an 8-bit, 8-channel analog-to-digital converter utilizing a half-flash architecture. It operates on a single 5 V supply with a typical power dissipation of 50 mW. The device features a built-in track-and-hold function capable of handling input signals up to 10 kHz. Conversion time is 2.5 µs per channel, yielding a maximum sampling rate of 50 kHz for the eight channels. Total unadjusted error is ±1 LSB, and it interfaces via standard parallel data outputs controlled by Chip Select and Read signals.

Feature Summary

• Half-flash conversion technique provides fast 2.5 µs per channel conversion without requiring an external clock signal.
• Built-in track-and-hold circuitry allows direct digitization of full-scale signals up to 10 kHz bandwidth.
• Single 5 V supply operation simplifies system power requirements and design.
• Tight total unadjusted error specification eliminates the need for user calibration trims.

Applications

• Multichannel data acquisition systems
• Industrial process control monitoring
• Microprocessor-based measurement instruments

Procurement Notes

Verify the specific suffix KP against the manufacturer's ordering guide to confirm the PLCC-28 package option and commercial temperature range. Confirm current availability status as legacy components may have limited distribution or obsolescence notices. Ensure the source document matches the exact part number to avoid confusion with the AD7824 variant.

Selection Notes

Select this component when an 8-channel multiplexed ADC is required with high speed and low power consumption. The half-flash architecture suits applications needing fast conversion without complex timing logic. Verify that the 5 V single-supply requirement aligns with the system voltage rails. Consider the parallel interface compatibility with the target microprocessor architecture.

Part Context

The AD7828 is part of the AD7824/AD7828 family of high-speed multichannel ADCs from Analog Devices. The AD7828 specifically offers eight analog input channels, whereas the AD7824 provides four. Both share the same LC2MOS fabrication process and half-flash conversion methodology, differing primarily in channel count and pin configuration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.