參數(shù)資料
型號: AD8629ARMZ-R2
廠商: ANALOG DEVICES INC
元件分類: 運動控制電子
英文描述: Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier
中文描述: DUAL OP-AMP, 10 uV OFFSET-MAX, 2 MHz BAND WIDTH, PDSO8
封裝: LEAD FREE, PLASTIC, MO-187AA, MSOP-8
文件頁數(shù): 15/20頁
文件大小: 476K
代理商: AD8629ARMZ-R2
AD8628/AD8629
PEAK-TO-PEAK NOISE
Because of the ping-pong action between auto-zeroing and
chopping, the peak-to-peak noise of the AD8628/AD8629 is
much lower than the competition. Figure 50 and Figure 51
show this comparison.
Rev. C | Page 15 of 20
e
p-p = 0.5
μ
V
BW = 0.1Hz TO 10Hz
TIME (1s/DIV)
V
μ
V
0
Figure 50. AD8628 Peak-to-Peak Noise
e
p-p = 2.3
μ
V
BW = 0.1Hz TO 10Hz
TIME (1s/DIV)
V
μ
V
0
Figure 51. LTC2050 Peak-to-Peak Noise
NOISE BEHAVIOR WITH FIRST-ORDER LOW-PASS
FILTER
The AD8628 was simulated as a low-pass filter and then
configured as shown in Figure 52. The behavior of the AD8628
matches the simulated data. It was verified that noise is rolled
off by first-order filtering.
470pF
OUT
100k
IN
1k
0
Figure 52. Test Circuit: First-Order Low-Pass Filter—×101 Gain
and 3 kHz Corner Frequency
FREQUENCY (Hz)
N
50
45
40
35
30
25
15
10
5
20
0
0
30
60
100
90
80
70
50
40
20
10
0
Figure 53. Simulation Transfer Function of the Test Circuit
FREQUENCY (kHz)
N
50
45
40
35
30
25
15
10
5
20
0
0
30
60
100
90
80
70
50
40
20
10
0
Figure 54. Actual Transfer Function of Test Circuit
The measured noise spectrum of the test circuit shows that
noise between 5 kHz and 45 kHz is successfully rolled off by the
first-order filter.
TOTAL INTEGRATED INPUT-REFERRED NOISE
FOR FIRST-ORDER FILTER
For a first-order filter, the total integrated noise from the
AD8628 is lower than the LTC2050.
3dB FILTER BANDWIDTH (Hz)
R
μ
V
10
1
0.1
10
100
10k
1k
0
LTC2050
AD8551
AD8628
Figure 55. 3 dB Filter Bandwidth in Hz
相關(guān)PDF資料
PDF描述
AD8628AR-REEL Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier
AD8628AR-REEL7 Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier
AD8628AR Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier
AD8628ART Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Low Noise Operational Amplifier
AD8628ART-R2 Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier
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