AD9238屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由亞德諾半導體技術有限公司制造生產(chǎn)的AD9238模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) 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(zhuǎn)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(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)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 AD9238 is a dual, 3 V, 12-bit, 20 MSPS/40 MSPS/65 MSPS analog-to-digital converter (ADC). It features dual high performance sample-and-hold amplifiers (SHAs) and an integrated voltage reference. The AD9238 uses a multistage differential pipelined architecture with output error correction logic to provide 12-bit accuracy and to guarantee no missing codes over the full operating temperature range at up to 65 MSPS data rates. The wide bandwidth, differential SHA allows for a variety of user-selectable input ranges and offsets, including single-ended applications.

FEATURES

Integrated dual 12-bit ADC

Single 3 V supply operation (2.7 V to 3.6 V)

SNR = 70 dB (to Nyquist, AD9238-65)

SFDR = 80.5 dBc (to Nyquist, AD9238-65)

Low power: 300 mW/channel at 65 MSPS

Differential input with 500 MHz, 3 dB bandwidth

Exceptional crosstalk immunity > 85 dB

Flexible analog input: 1 V p-p to 2 V p-p range

Offset binary or twos complement data format

Clock duty cycle stabilizer

Output datamux option

APPLICATIONS

Ultrasound equipment

Direct conversion or IF sampling receivers

WB-CDMA, CDMA2000, WiMAX

Battery-powered instruments

Hand-held scopemeters

Low cost, digital oscilloscopes