AD7828KPZ-REEL

Overview

The AD7828KPZ-REEL is an 8-channel, 8-bit analog-to-digital converter utilizing a half-flash architecture. It features a built-in track-and-hold circuit capable of handling 10 kHz signals with a slew rate up to 157 mV/µs. The device operates on a single 5 V supply and achieves a conversion time of 2.5 µs per channel, allowing a maximum sampling rate of 50 kHz per channel. It employs a parallel interface controlled by Chip Select (CS) and Read (RD) signals without requiring an external clock. The component is housed in a 28-lead PLCC surface-mount package.

Feature Summary

• Half-flash conversion technique provides high-speed digitization without external clocking requirements.
• Integrated multiplexer and track-and-hold function support multi-channel acquisition of high-frequency signals.
• Parallel data outputs utilize three-state drivers for direct microprocessor interfacing.
• Single 5 V power supply operation simplifies system design and reduces component count.

Applications

• Speech analysis systems using real-time filtering
• Fast infinite sample-and-hold circuits
• Microprocessor-based data acquisition systems

Procurement Notes

Verify the specific suffix 'KPZ' against the manufacturer's current ordering guide to confirm package type and temperature range. Confirm RoHS compliance status as specifications may vary by production lot. Ensure the source impedance of the driving circuit does not exceed 100 Ω to maintain specified accuracy levels during operation.

Selection Notes

Select this model when eight simultaneous or multiplexed analog inputs are required within a compact surface-mount footprint. The half-flash architecture is suitable for applications needing faster conversion speeds than successive approximation ADCs while maintaining moderate resolution. Verify that the host microprocessor supports the required timing modes for CS and RD signal generation.

Part Context

This component belongs to the AD7824/AD7828 family of high-speed multichannel ADCs. The AD7828 variant specifically provides eight analog input channels compared to the four channels found in the AD7824. Both devices share identical internal architectures and electrical characteristics, differing primarily in channel count and pin configuration.

Replacement Considerations

The AD7828KNZ serves as a pin-compatible through-hole alternative offering identical electrical performance in a 28-pin DIP package. Other variants within the AD7828 series provide different temperature ranges and packaging options such as SOIC or LCCC.