AD7828KPZ

Overview

The AD7828KPZ is an 8-bit, high-speed analog-to-digital converter featuring eight multiplexed single-ended analog input channels. It utilizes a half-flash conversion architecture to achieve a fast conversion rate of 2.5 µs per channel. The device operates from a single 5 V supply with an analog input range of 0 V to 5 V and includes a built-in track-and-hold function capable of handling signals up to 10 kHz. It interfaces directly with microprocessors using standard 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

• Eight-channel multiplexer for cost-effective multichannel data acquisition
• Built-in track-and-hold function supporting 10 kHz signal bandwidth
• Half-flash conversion technique eliminating the need for an ADC clock
• Simple parallel interface compatible with standard microprocessor control

Applications

• Speech analysis systems utilizing 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 the exact package type and temperature grade. Confirm RoHS compliance status as indicated in the latest documentation. Check for any product change notices regarding pinout or electrical specifications before finalizing procurement.

Selection Notes

Select this component when an 8-bit resolution and 2.5 µs conversion time are required for multiple analog inputs. Ensure the system can provide a stable 5 V reference voltage. Verify that the source impedance driving the analog inputs does not exceed 100 Ω to maintain accuracy. Consider Mode 0 or Mode 1 operation based on the microprocessor's wait state capabilities.

Part Context

The AD7828KPZ belongs to the AD7824/AD7828 family of LC2MOS high-speed ADCs. While the AD7824 offers four channels, the AD7828 provides eight channels within the same architectural framework. This family is designed for applications requiring rapid sampling of multiple signals without external sample-and-hold amplifiers.

Replacement Considerations

The AD7828KNZ serves as a direct replacement offering identical electrical characteristics but utilizes a 28-lead PDIP through-hole package instead of the PLCC surface-mount option.