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

AD9238BSTRL-40属于集成电路（IC） > 模数转换器（ADC）。亚德诺半导体技术有限公司制造生产的AD9238BSTRL-40模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。