5秒后页面跳转
捷配首页

Datasheet > AD8428ARZ
AD8428ARZ PDF预览

AD8428ARZ

更新时间： 2024-02-07 02:34:55
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
20页 348K
描述
Low Noise, Low Gain Drift, G = 2000

阅读下载

中文翻译

获取价格

AD8428ARZ 技术参数

生命周期：Active包装说明：DIE,
Reach Compliance Code：compliant风险等级：5.76
放大器类型：INSTRUMENTATION AMPLIFIER最大平均偏置电流 (IIB)：0.2 µA
标称带宽 (3dB)：3.5 MHz最小共模抑制比：130 dB
最大输入失调电流 (IIO)：0.05 µA最大输入失调电压：100 µV
JESD-30 代码：R-XUUC-N8长度：2.89 mm
负供电电压上限：-18 V标称负供电电压 (Vsup)：-15 V
最大非线性：0.0005%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：UNSPECIFIED
封装代码：DIE封装形状：RECTANGULAR
封装形式：UNCASED CHIP座面最大高度：0.3048 mm
标称压摆率：50 V/us子类别：Instrumentation Amplifier
供电电压上限：18 V标称供电电压 (Vsup)：15 V
表面贴装：YES温度等级：INDUSTRIAL
端子形式：NO LEAD端子位置：UPPER
标称电压增益：2000宽度：1.755 mm
Base Number Matches：1

AD8428ARZ 数据手册

 浏览型号AD8428ARZ的Datasheet PDF文件第13页浏览型号AD8428ARZ的Datasheet PDF文件第14页浏览型号AD8428ARZ的Datasheet PDF文件第15页浏览型号AD8428ARZ的Datasheet PDF文件第17页浏览型号AD8428ARZ的Datasheet PDF文件第18页浏览型号AD8428ARZ的Datasheet PDF文件第19页 
AD8428  
Data Sheet  
For best results, place the RFI filter network as close to the  
RADIO FREQUENCY INTERFERENCE (RFI)  
amplifier as possible. Layout is critical to ensure that RF signals  
are not picked up on the traces after the filter. If RF interference  
is too strong to be filtered, shielding is recommended.  
Because of its high gain and low noise properties, the AD8428  
is a highly sensitive amplifier. Therefore, RF rectification can be  
a problem if the AD8428 is used in applications that have strong  
RF signal sources present. The problem is intensified if long leads  
or PCB traces are required to connect the amplifier to the signal  
source. The disturbance can appear as a dc offset voltage or as a  
train of pulses.  
Note that the resistors used for the RFI filter can be the same  
as those used for input protection (see the Input Protection  
section).  
CALCULATING THE NOISE OF THE INPUT STAGE  
High frequency signals can be filtered with a low-pass filter  
network at the input of the instrumentation amplifier, as shown  
in Figure 44.  
The total noise of the amplifier front end depends on much  
more than the specifications in this data sheet. The three main  
contributors to noise are as follows:  
+V  
S
•
•
•
Source resistance  
Voltage noise of the instrumentation amplifier  
Current noise of the instrumentation amplifier  
0.1µF  
+IN  
10µF  
C
1nF  
C
L*  
L*  
R
In the following calculations, noise is referred to the input (RTI);  
that is, all sources of noise are calculated as if the source appeared  
at the amplifier input. To calculate the noise referred to the ampli-  
fier output (RTO), multiply the RTI noise by the gain of the  
instrumentation amplifier.  
33Ω  
OUT  
C
D
AD8428  
10nF  
R
REF  
–IN  
33Ω  
C
C
1nF  
Source Resistance Noise  
0.1µF  
10µF  
Any sensor connected to the AD8428 has some output resistance.  
There may also be resistance placed in series with the inputs for  
protection from either overvoltage or radio frequency interference.  
This combined resistance is labeled R1 and R2 in Figure 45. Any  
resistor, no matter how well made, has an intrinsic level of noise.  
This noise is proportional to the square root of the resistor value.  
At room temperature, the value is approximately equal to  
4 nV/√Hz × √(resistor value in kΩ).  
–V  
S
*CHIP FERRITE BEAD.  
Figure 44. RFI Suppression  
The filter limits both the differential and common-mode band-  
width, as shown in the following equations:  
1
FilterFrequencyDIFF  
=
2πR(2CD +CC )  
SENSOR  
1
FilterFrequencyCM  
=
2πRCC  
R1  
AD8428  
where CD ≥ 10 CC.  
CD affects the differential signal, and CC affects the common-  
mode signal. Choose values of R and CC that minimize RFI. A  
mismatch between R × CC at the positive input and R × CC at  
the negative input degrades the CMRR of the AD8428. By using  
a value of CD one order of magnitude larger than CC, the effect  
of the mismatch is reduced, and performance is improved.  
R2  
Figure 45. Source Resistance from Sensor and Protection Resistors  
For example, assuming that the combined sensor and protec-  
tion resistance is 4 kΩ on the positive input and 1 kΩ on the  
negative input, the total noise from the input resistance is  
Resistors add noise; therefore, the choice of resistor and capac-  
itor values depends on the desired trade-off between noise, input  
impedance at high frequencies, and RFI immunity. To achieve  
low noise and sufficient RFI filtering, the use of inductive ferrite  
beads is recommended (see Figure 44). Using inductive ferrite  
beads allows the value of the resistors to be reduced, which helps  
to minimize the noise at the input.  
2
2
(
4 × 4  
)
+
(
4 × 1  
)
= 64 +16 = 8.9 nV/ Hz  
Rev. A | Page 16 of 20  
 
 
 
1...1314151617181920

中文翻译

下载PDF

与AD8428ARZ相关器件

型号 品牌 描述 获取价格 数据表
AD8428ARZ-RL ADI Low Noise, Low Gain Drift, G = 2000

获取价格
AD8428BRZ ADI Low Noise, Low Gain Drift, G = 2000

获取价格
AD8428BRZ-RL ADI Low Noise, Low Gain Drift, G = 2000

获取价格
AD8428-KGD-WP ADI Instrumentation Amplifier

获取价格
AD8429 ADI Low Noise, Low Gain Drift, G = 2000

获取价格
AD8429ARZ ADI 1 nV/√Hz Low Noise Instrumentation Amplifier

获取价格

与AD8428ARZ相关文章

您还可以找


热门产品
PCB打样/小批量
铝基板
BOM智能配单
PCBA制造
钣金
精密CNC
模具注塑
薄膜开关
精选活动
PCBA打样特惠
四六层板品质升级
铝基板品质升级
一体化电子制造
DFM下载
服务支持
企业认证
产品展示
工厂展示
工艺能力
积分商城
关于捷配
捷配简介
企业文化
公司动态
人才招聘
联系我们
帮助中心
下单流程
付款流程
开票流程
常见问题
全球PCB制造服务专线 400-613-0088

工作时间：9:00-21:00

CEO邮箱：ceo@jiepei.com

投诉邮箱：tousu@jiepei.com

捷配网-微信公众号 微信公众号
捷配网-微信公众号 抖音公众号
资质认证：
合作快递：
支付方式：
Copyright © 2024 Jiepei.com Inc. All Rights Reserved. 版权所有:杭州捷配信息科技有限公司 浙公网安备 33010502006866号 浙ICP备10014259号-119 营业执照ICP证