AD7828KP-REEL

Overview

The AD7828KP-REEL is an 8-bit, 8-channel analog-to-digital converter utilizing a half-flash architecture. It features a built-in track-and-hold circuit capable of handling input signals up to 10 kHz with a slew rate of 157 mV/µs. The device operates from a single 5 V supply and dissipates approximately 50 mW. Conversion time is 2.5 µs per channel, yielding a maximum sampling rate of 50 kHz per channel. Total unadjusted error is ±1 LSB for the K version. It interfaces via standard microprocessor control signals without requiring an external clock.

Feature Summary

• Half-flash conversion technique eliminates the need for an external ADC clock signal.
• Built-in track-and-hold function supports high-speed signal digitization without external components.
• Direct microprocessor interface using Chip Select and Read signals simplifies system integration.

Applications

• Speech analysis systems utilizing real-time filtering
• Fast infinite sample-and-hold circuits
• Multichannel data acquisition systems

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm package type and temperature range. Confirm RoHS compliance status as indicated in current documentation. Check for availability of the reel packaging option directly with authorized distributors or the manufacturer.

Selection Notes

Select this component when eight multiplexed channels are required with moderate speed and resolution. Ensure the driving source impedance is low enough to charge internal capacitors within the tracking window. Verify that the microprocessor timing aligns with Mode 0 or Mode 1 requirements.

Part Context

This part belongs to the AD7824/AD7828 family of high-speed multichannel ADCs. The AD7828 variant specifically provides eight analog inputs compared to the four found in the AD7824. Both share identical conversion architectures and power specifications.

Replacement Considerations

The AD7828KN serves as a pin-compatible alternative in a DIP package. Other family members like the AD7824 offer fewer channels but maintain similar electrical characteristics.