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AD8138ARZ PDF预览

AD8138ARZ

更新时间: 2024-01-03 14:14:17
品牌 Logo 应用领域
亚德诺 - ADI 线路驱动器或接收器驱动程序和接口接口集成电路光电二极管PC
页数 文件大小 规格书
24页 451K
描述
Low Distortion Differential ADC Driver

AD8138ARZ 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:SOIC
包装说明:SOP,针数:8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.31.00.01风险等级:0.78
差分输出:YES驱动器位数:1
输入特性:DIFFERENTIAL接口集成电路类型:LINE DRIVER
接口标准:GENERAL PURPOSEJESD-30 代码:R-PDSO-G8
JESD-609代码:e3长度:4.9 mm
湿度敏感等级:1标称负供电电压:-5 V
功能数量:1端子数量:8
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):260认证状态:Not Qualified
最大接收延迟:座面最大高度:1.75 mm
最大供电电压:5.5 V最小供电电压:1.4 V
标称供电电压:5 V表面贴装:YES
技术:BIPOLAR温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:3.9 mm
Base Number Matches:1

AD8138ARZ 数据手册

 浏览型号AD8138ARZ的Datasheet PDF文件第18页浏览型号AD8138ARZ的Datasheet PDF文件第19页浏览型号AD8138ARZ的Datasheet PDF文件第20页浏览型号AD8138ARZ的Datasheet PDF文件第22页浏览型号AD8138ARZ的Datasheet PDF文件第23页浏览型号AD8138ARZ的Datasheet PDF文件第24页 
AD8138  
HIGH PERFORMANCE ADC DRIVING  
The circuit in Figure 46 shows a simplified front-end  
connection for an AD8138 driving an AD9224, a 12-bit,  
40 MSPS ADC. The ADC works best when driven differentially,  
which minimizes its distortion. The AD8138 eliminates the  
need for a transformer to drive the ADC and performs single-  
ended-to-differential conversion, common-mode level-shifting,  
and buffering of the driving signal.  
The signal generator has a ground-referenced, bipolar output,  
that is, it drives symmetrically above and below ground.  
Connecting VOCM to the CML pin of the AD9224 sets the output  
common-mode of the AD8138 at 2.5 V, which is the midsupply  
level for the AD9224. This voltage is bypassed by a 0.1 μF  
capacitor.  
The full-scale analog input range of the AD9224 is set to  
4 V p-p, by shorting the SENSE terminal to AVSS. This has  
been determined to be the scaling to provide minimum  
harmonic distortion.  
The positive and negative outputs of the AD8138 are connected  
to the respective differential inputs of the AD9224 via a pair of  
49.9 Ω resistors to minimize the effects of the switched-capacitor  
front end of the AD9224. For best distortion performance, it  
runs from supplies of 5 V.  
For the AD8138 to swing at 4 V p-p, each output swings 2 V p-p  
while providing signals that are 180° out of phase. With a  
common-mode voltage at the output of 2.5 V, each AD8138  
output swings between 1.5 V and 3.5 V.  
The AD8138 is configured with unity gain for a single-ended,  
input-to-differential output. The additional 23 Ω, 523 Ω total, at  
the input to −IN is to balance the parallel impedance of the  
50 Ω source and its 50 Ω termination that drives the  
noninverting input.  
A ground-referenced 4 V p-p, 5 MHz signal at DIN+ was used to  
test the circuit in Figure 46. When the combined-device circuit  
was run with a sampling rate of 20 MSPS, the spurious-free  
dynamic range (SFDR) was measured at −85 dBc.  
+5V  
+5V  
0.1pF  
0.1pF  
499Ω  
15 26  
28  
3
49.9Ω  
49.9Ω  
499Ω  
AVDD DRVDD  
AD9224  
5
8
2
+
24  
23  
VINB  
DIGITAL  
OUTPUTS  
V
OCM  
50Ω  
SOURCE  
49.9Ω  
AD8138  
523Ω  
1
4
VINA  
AVSS SENSE CML DRVSS  
16 25  
6
17  
22  
27  
0.1pF  
499Ω  
–5V  
Figure 46. AD8138 Driving an AD9224, a 12-Bit, 40 MSPS ADC  
Rev. F | Page 21 of 24  
 
 

AD8138ARZ 替代型号

型号 品牌 替代类型 描述 数据表
AD8138ARZ-RL ADI

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Low Distortion Differential ADC Driver
AD8138AR ADI

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Low Distortion Differential ADC Driver

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