AD7828LPZ-REEL

Overview

The AD7828LPZ-REEL is an 8-channel, 8-bit analog-to-digital converter utilizing a half-flash conversion technique. It features a built-in track-and-hold function capable of handling signals up to 10 kHz with a slew rate of 157 mV/µs. The device operates from a single 5 V supply and achieves a fast conversion rate of 2.5 µs per channel. Total unadjusted error is specified at ±1/2 LSB for the L version. It interfaces directly with microprocessors via standard Chip Select and Read signals without requiring an external clock.

Feature Summary

• Eight multiplexed analog input channels enable cost-effective multichannel data acquisition systems.
• Built-in track-and-hold circuitry allows direct digitization of high-speed signals without external sampling components.
• Half-flash architecture eliminates the need for an external ADC clock signal during operation.
• Tight total unadjusted error specification and channel-to-channel matching reduce the requirement for user calibration.

Applications

• Multichannel industrial process control monitoring
• Speech analysis using real-time filtering applications
• Fast infinite sample-and-hold circuits

Procurement Notes

Verify that the ordering suffix LPZ corresponds to the specific package option P-28A and the commercial temperature range (0 °C to 70 °C). Confirm the lot traceability and manufacturing origin align with project requirements before finalizing procurement orders.

Selection Notes

Select this component when eight simultaneous or multiplexed analog inputs are required within a compact footprint. Ensure the driving source impedance remains below 100 Ω to maintain accuracy. Verify that the system power budget accommodates the typical 50 mW dissipation at 5 V.

Part Context

This part belongs to the AD7824/AD7828 family of LC2MOS high-speed ADCs. While the AD7824 provides four channels in a 24-lead package, the AD7828 expands capacity to eight channels in a 28-lead configuration. Both share identical internal conversion architectures and timing characteristics.

Replacement Considerations

Public confirmed substitute part numbers: AD7828LRS, AD7828BR, AD7828BQ.