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AD8475ACPZ-RL

更新时间： 2024-02-13 16:05:53
品牌 Logo 应用领域
亚德诺 - ADI 运算放大器放大器电路
页数 文件大小 规格书
24页 554K
描述
Precision, Selectable Gain, Fully Differential Funnel Amplifier

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中文翻译

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AD8475ACPZ-RL 技术参数

Source Url Status Check Date：2013-05-01 14:56:26.504是否无铅： 含铅
是否Rohs认证： 符合生命周期：Active
零件包装代码：TSSOP包装说明：TSSOP,
针数：10Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.31.00.01
风险等级：5.18Is Samacsys：N
放大器类型：OPERATIONAL AMPLIFIER标称共模抑制比：86 dB
最大输入失调电压：200 µVJESD-30 代码：S-PDSO-G10
JESD-609代码：e3长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：10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：TSSOP封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.1 mm
标称压摆率：50 V/us子类别：Operational Amplifier
供电电压上限：11 V标称供电电压 (Vsup)：5 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3 mm
Base Number Matches：1

AD8475ACPZ-RL 数据手册

 浏览型号AD8475ACPZ-RL的Datasheet PDF文件第16页浏览型号AD8475ACPZ-RL的Datasheet PDF文件第17页浏览型号AD8475ACPZ-RL的Datasheet PDF文件第18页浏览型号AD8475ACPZ-RL的Datasheet PDF文件第20页浏览型号AD8475ACPZ-RL的Datasheet PDF文件第21页浏览型号AD8475ACPZ-RL的Datasheet PDF文件第22页 
AD8475  
APPLICATIONS INFORMATION  
TYPICAL CONFIGURATION  
SETTING THE OUTPUT COMMON-MODE VOLTAGE  
The VOCM pin of the AD8475 is internally biased with a  
precision voltage divider comprising two 200 kΩ resistors between  
the supplies. This divider level shifts the output to midsupply.  
Relying on the internal bias results in an output common-mode  
voltage that is within 0.01% of the expected value.  
The AD8475 is designed to facilitate single-ended-to-differential  
conversion, common-mode level shifting, and precision attenuation  
of large signals so that they are compatible with low voltage ADCs.  
Figure 53 shows a typical connection diagram of the AD8475  
in a gain of 0.4. To use the AD8475 in a gain of 0.8, drive the  
IN 0.8x inputs with a low impedance source.  
In cases where control of the output common-mode level is  
desired, an external source or resistor divider with source  
resistance less than 100 Ω can be used to drive the VOCM pin.  
If an external voltage divider consisting of equal resistor values  
is used to set VOCM to midsupply, higher values can be used  
because the external resistors are placed in parallel with the  
internal resistors. The output common-mode offset listed in the  
Specifications section assumes that the VOCM input is driven by a  
low impedance voltage source.  
SINGLE-ENDED TO DIFFERENTIAL CONVERSION  
Many industrial systems use single-ended; however, the signals  
are frequently processed by high performance differential input  
ADCs for higher precision. The AD8475 performs the critical  
function of precisely converting single-ended signals to the  
differential inputs of precision ADCs, and it does so with no  
need for external components.  
To convert a single-ended signal to a differential signal, connect  
one input to the signal source and the other input to ground (see  
Figure 55). Note that either input can be driven by the source  
with the only effect being that the outputs have reversed polarity.  
The AD8475 also accepts truly differential input signals in  
precision systems with differential signal paths.  
Because of the internal divider, the VOCM pin sources and sinks  
current, depending on the externally applied voltage and its  
associated source resistance.  
It is also possible to connect the VOCM input to the common-  
mode level output of an ADC; however, care must be taken to  
ensure that the output has sufficient drive capability. The input  
impedance of the VOCM pin is 100 kΩ. If multiple AD8475  
devices share one ADC reference output, a buffer may be neces-  
sary to drive the parallel inputs.  
–V  
S
+
0.1µF  
10µF  
LOW  
IMPEDANCE  
INPUT SOURCE  
+IN 0.8x +IN 0.4x  
–V  
NC  
–OUT  
1kΩ  
S
1.25kΩ  
1.25kΩ  
V
= (V  
– V  
)
OUT  
+OUT  
–OUT  
AD8475  
1.25kΩ  
1kΩ  
1.25kΩ  
–IN 0.8x –IN 0.4x  
+V  
VOCM  
+OUT  
S
+
REF  
10µF  
0.1µF  
+V  
0.1µF  
S
Figure 52. Typical Configuration—10-Lead MSOP  
Rev. B | Page 19 of 24  
 
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