参数资料
型号: AD9222ABCPZRL7-65
厂商: Analog Devices Inc
文件页数: 28/60页
文件大小: 0K
描述: IC ADC 12BIT SRL 65MSPS 64LFCSP
标准包装: 750
位数: 12
采样率(每秒): 65M
数据接口: 串行,SPI?
转换器数目: 8
功率耗散(最大): 950.5mW
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘,CSP
供应商设备封装: 64-LFCSP-VQ(9x9)
包装: 带卷 (TR)
输入数目和类型: 16 个单端,单极;8 个差分,单极
AD9222
Data Sheet
Rev. F | Page 34 of 60
HARDWARE INTERFACE
The pins described in Table 14 compose the physical interface
between the user’s programming device and the serial port of
the AD9222. The SCLK and CSB pins function as inputs when
using the SPI. The SDIO pin is bidirectional, functioning as an
input during write phases and as an output during readback.
If multiple SDIO pins share a common connection, care should
be taken to ensure that proper VOH levels are met. Assuming the
same load for each AD9222, Figure 83 shows the number of SDIO
pins that can be connected together and the resulting VOH level.
05967-
037
NUMBER OF SDIO PINS CONNECTED TOGETHER
V
OH
(V)
1.715
1.720
1.725
1.730
1.735
1.740
1.745
1.750
1.755
1.760
1.765
1.770
1.775
1.780
1.785
1.790
1.795
1.800
0
30
20
10
40
50
60
70
80
90
100
Figure 83. SDIO Pin Loading
This interface is flexible enough to be controlled by either serial
PROMS or PIC mirocontrollers, providing the user with an
alternative method, other than a full SPI controller, to program
the ADC (see the AN-812 Application Note).
If the user chooses not to use the SPI, these dual-function pins
serve their secondary functions when the CSB is strapped to
AVDD during device power-up. See the Theory of Operation
section for details on which pin-strappable functions are
supported on the SPI pins.
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