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AD629_07 PDF预览

AD629_07

更新时间: 2024-10-28 04:04:11
品牌 Logo 应用领域
亚德诺 - ADI 放大器
页数 文件大小 规格书
16页 533K
描述
High Common-Mode Voltage, Difference Amplifier

AD629_07 数据手册

 浏览型号AD629_07的Datasheet PDF文件第10页浏览型号AD629_07的Datasheet PDF文件第11页浏览型号AD629_07的Datasheet PDF文件第12页浏览型号AD629_07的Datasheet PDF文件第14页浏览型号AD629_07的Datasheet PDF文件第15页浏览型号AD629_07的Datasheet PDF文件第16页 
AD629  
ERROR BUDGET ANALYSIS EXAMPLE 2  
OUTPUT  
This application is similar to the previous example except  
that the sensed load current is from an amplifier with an ac  
common-mode component of ±177 ꢁ (frequency = ±77 Hz)  
present on the shunt (see Figure 39). All other conditions are  
the same as before. Note that the same kind of power-line  
interference can happen as detailed in Example 1. However,  
the ac common-mode component of 277 ꢁ p-p coming from  
the shunt is much larger than the interference of 1 ꢁ p-p;  
therefore, this interference component can be neglected.  
CURRENT  
AD629  
REF (–)  
21.1kΩ  
10 AMPS  
±100V AC CM  
TO GROUND  
NC  
1
2
3
4
8
7
6
5
380k380kΩ  
–IN  
+IN  
+V  
S
0.1µF  
1Ω  
SHUNT  
380kΩ  
V
OUT  
20kΩ  
REF (+)  
–V  
S
60Hz  
0.1µF  
POWER LINE  
NC = NO CONNECT  
Figure 39. Error Budget Analysis Example 2: VIN = 10 V Full-Scale,  
VCM 100 V at 500 Hz, RSHUNT =1 Ω  
=
Table 6. AD629 vs. INA117 AC Error Budget Example 2 (VCM  
=
100 V @ 500 Hz)  
INA117  
Error, ppm of FS  
Error Source  
AD629  
AD629  
INA117  
ACCURACY, TA = 25°C  
Initial Gain Error  
Offset Voltage  
(ꢀ.ꢀꢀꢀ5 × 1ꢀ)/1ꢀ V × 1ꢀ6  
(ꢀ.ꢀꢀ1 V/1ꢀ V) × 1ꢀ6  
(ꢀ.ꢀꢀꢀ5 × 1ꢀ)/1ꢀ V × 1ꢀ6  
(ꢀ.ꢀꢀ2 V/1ꢀ V) × 1ꢀ6  
5ꢀꢀ  
1ꢀꢀ  
6ꢀꢀ  
5ꢀꢀ  
2ꢀꢀ  
7ꢀꢀ  
Total Accuracy Error  
TEMPERATURE DRIFT (85°C)  
Gain  
1ꢀ ppm/°C × 6ꢀ°C  
(2ꢀ μV/°C × 6ꢀ°C) × 1ꢀ6/1ꢀ V  
1ꢀ ppm/°C × 6ꢀ°C  
6ꢀꢀ  
12ꢀ  
72ꢀ  
6ꢀꢀ  
24ꢀ  
84ꢀ  
Offset Voltage  
(4ꢀ μV/°C × 6ꢀ°C) × 1ꢀ6/1ꢀ V  
Total Drift Error  
RESOLUTION  
Noise, Typical, ꢀ.ꢀ1 Hz to 1ꢀ Hz, μV p-p  
CMR, 6ꢀ Hz  
Nonlinearity  
15 μV/1ꢀ V × 1ꢀ6  
25 μV/1ꢀ V × 1ꢀ6  
2
3
(141 × 1ꢀ-6 × 1 V)/1ꢀ V × 1ꢀ6  
(1ꢀ-5 × 1ꢀ V)/1ꢀ V × 1ꢀ6  
(141 × 1ꢀ-6 × 2ꢀꢀ V)/1ꢀ V × 1ꢀ6  
(5ꢀꢀ × 1ꢀ-6 × 1 V)/1ꢀ V × 1ꢀ6  
(1ꢀ-5 × 1ꢀ V)/1ꢀ V × 1ꢀ6  
(5ꢀꢀ × 1ꢀ-6 × 2ꢀꢀ V)/1ꢀ V × 1ꢀ6  
Total Resolution Error  
Total Error  
14  
5ꢀ  
1ꢀ  
1ꢀ  
AC CMR @ 5ꢀꢀ Hz  
282ꢀ  
2846  
4166  
1ꢀ,ꢀꢀꢀ  
1ꢀ,ꢀ63  
11,6ꢀ3  
Rev. B | Page 13 of 16  
 
 

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