AD7822屬于集成電路（IC）的模數(shù)轉換器（ADC）。由亞德諾半導體技術有限公司制造生產(chǎn)的AD7822模數(shù)轉換器（ADC）模數(shù)轉換器（ADC、A/D 或 A 轉 D）對模擬信號進行采樣，例如由麥克風采集的聲音或傳感器的輸出，然后將其轉換為數(shù)字信號。一般來說，數(shù)字輸出是二進制補碼二進制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉換器數(shù)和架構（例如自適應增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進行選擇。

GENERAL DESCRIPTION

The AD7822/AD7825/AD7829 are high speed, 1-, 4-, and 8-channel, microprocessor-compatible, 8-bit analog-to-digital converters with a maximum throughput of 2 MSPS. The AD7822/AD7825/AD7829 contain an on-chip reference of 2.5 V (2 tolerance); a track-and-hold amplifier; a 420 ns, 8-bit halfflash ADC; and a high speed parallel interface. The converters can operate from a single 3 V ± 10 and 5 V ± 10 supply.

FEATURES

8-bit half-flash ADC with 420 ns conversion time

One, four, and eight single-ended analog input channels

Available with input offset adjust

On-chip track-and-hold

SNR performance given for input frequencies up to 10 MHz

On-chip reference (2.5 V)

Automatic power-down at the end of conversion

Wide operating supply range

3 V ± 10 and 5 V ± 10

Input ranges

0 V to 2 V p-p, VDD = 3 V ± 10

0 V to 2.5 V p-p, VDD = 5 V ± 10

Flexible parallel interface with EOC pulse to allow

standalone operation

APPLICATIONS

Data acquisition systems, DSP front ends

Disk drives

Mobile communication systems, subsampling

applications