AD7828BRZ-REEL

Overview

The AD7828BRZ-REEL is an 8-channel, 8-bit analog-to-digital converter (ADC) 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 B grade version. It interfaces via standard Chip Select and Read signals without requiring an external clock.

Feature Summary

• Half-flash architecture eliminates the need for an external ADC clock signal
• Built-in track-and-hold function supports high-speed signal digitization
• Multiplexed input structure allows cost-effective multichannel data acquisition
• Standard microprocessor interface simplifies system integration

Applications

• Speech analysis using real-time filtering
• Fast infinite sample-and-hold systems
• Industrial process control monitoring
• Portable instrumentation with single-supply requirements

Procurement Notes

Verify that the ordering suffix REEL indicates tape-and-reel packaging rather than tube or cut tape formats. Confirm the BRZ designation corresponds to the industrial temperature range (-40°C to +85°C) and RoHS compliance status required by your specific manufacturing standards before finalizing procurement orders.

Selection Notes

Select this component when eight multiplexed channels are required within a compact footprint. The half-flash architecture provides faster throughput compared to traditional SAR converters without external clocking. Ensure the driving source impedance remains below 100 Ω to maintain accuracy given the internal sampling capacitance characteristics.

Part Context

This part belongs to the AD7824/AD7828 family of LC2MOS high-speed ADCs. While the AD7824 offers four channels in a 24-lead package, the AD7828 provides eight channels in a 28-lead configuration. Both share identical conversion architectures and timing specifications, differing primarily in channel count and pinout assignments.

Replacement Considerations

Direct functional replacements include the AD7824 for reduced channel counts or other variants within the AD782x series. Verify pin compatibility and temperature range specifications when substituting, as package options and operating ranges vary across the product line.