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參數(shù)資料
| 型號： | AD629BRZ-RL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | High Common-Mode Voltage, Difference Amplifier |
| 中文描述： | OP-AMP, 1000 uV OFFSET-MAX, PDSO8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 415K |
| 代理商： | AD629BRZ-RL |
AD629
ERROR BUDGET ANALYSIS EXAMPLE 2
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 ±100 V (frequency = 500 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 200 V p-p coming from
the shunt is much larger than the interference of 1 V p-p;
therefore, this interference component can be neglected.
Rev. B | Page 13 of 16
REF (–)
OUTPUT
CURRENT
60Hz
POWER LINE
1
SHUNT
REF (+)
–V
S
+V
S
V
OUT
NC
–IN
+IN
0.1μF
0.1μF
NC = NO CONNECT
21.1k
380k
380k
20k
380k
AD629
1
2
3
4
8
7
6
5
0
10 AMPS
±100V AC CM
TO GROUND
Figure 39. Error Budget Analysis Example 2: V
IN
= 10 V Full-Scale,
V
CM
= ±100 V at 500 Hz, R
SHUNT
=1 Ω
Table 6. AD629 vs. INA117 AC Error Budget Example 2 (V
CM
= ±100 V @ 500 Hz)
Error Source
ACCURACY, T
A
= 25°C
Initial Gain Error
Offset Voltage
TEMPERATURE DRIFT (85°C)
Gain
Offset Voltage
RESOLUTION
Noise, Typical, 0.01 Hz to 10 Hz, μV p-p
CMR, 60 Hz
Nonlinearity
AC CMR @ 500 Hz
AD629
(0.0005 × 10)/10 V × 10
6
(0.001 V/10 V) × 10
6
10 ppm/°C × 60°C
(20 μV/°C × 60°C) × 10
6
/10 V
15 μV/10 V × 10
6
(141 × 10
-6
× 1 V)/10 V × 10
6
(10
-5
× 10 V)/10 V × 10
6
(141 × 10
-6
× 200 V)/10 V × 10
6
INA117
(0.0005 × 10)/10 V × 10
6
(0.002 V/10 V) × 10
6
Total Accuracy Error
10 ppm/°C × 60°C
(40 μV/°C × 60°C) × 10
6
/10 V
Total Drift Error
25 μV/10 V × 10
6
(500 × 10
-6
× 1 V)/10 V × 10
6
(10
-5
× 10 V)/10 V × 10
6
(500 × 10
-6
× 200 V)/10 V × 10
6
Total Resolution Error
Total Error
Error, ppm of FS
AD629
500
100
600
600
120
720
2
14
10
2820
2846
4166
INA117
500
200
700
600
240
840
3
50
10
10,000
10,063
11,603
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