參數(shù)資料
型號(hào): AD628ARMZ-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, Programmable Gain Difference Amplifier
中文描述: OP-AMP, 1500 uV OFFSET-MAX, PDSO8
封裝: ROHS COMPLIANT, MO-187AA, MSOP-8
文件頁數(shù): 18/20頁
文件大小: 298K
代理商: AD628ARMZ-RL
AD628
Rev. F | Page 18 of 20
+IN
–IN
G = +0.1
10k
Ω
A1
–IN
100k
Ω
+V
S
5V
V
REF
–V
S
+IN
–IN
A2
OUT
AD628
100k
Ω
10k
Ω
OTHER
BATTERIES IN
CHARGING
CIRCUIT
CHARGING
CIRCUIT
+1.5V
BATTERY
10k
Ω
+IN
nV
BAT
(V)
R
EXT1
10k
Ω
0V TO 5V
TO ADC
C
FILT
R
G
0
Figure 34. Battery Voltage Monitor
FILTER CAPACITOR VALUES
Connect a capacitor to Pin 4 (C
FILT
) to implement a low-pass
filter. The capacitor value is
( )
15.9/
t
f
C
=
where
f
t
is the desired 3 dB filter frequency.
Table 7 shows several frequencies and their closest standard
capacitor values.
Table 7. Capacitor Values for Various Filter Frequencies
Frequency (Hz)
Capacitor Value (μF)
10
1.5
50
0.33
60
0.27
100
0.15
400
0.039
1 k
0.015
5 k
0.0033
10 k
0.0015
KELVIN CONNECTION
In certain applications, it may be desirable to connect the
inverting input of an amplifier to a remote reference point.
This eliminates errors resulting in circuit losses in interconnect-
ing wiring. The AD628 is particularly suited for this type of
connection. In Figure 35, a 10 kΩ resistor added in the feedback
matches the source impedance of A2. This is described in more
detail in the Gain Adjustment section.
+IN
–IN
A2
+V
S
5V
–IN
+IN
V
REF
OUT
CIRCUIT
LOSS
LOAD
+IN
–IN
G = +0.1
A1
AD628
–V
S
10k
Ω
10k
Ω
10k
Ω
100k
Ω
100k
Ω
V
S
/2
C
FILT
R
G
10k
Ω
0
Figure 35. Kelvin Connection
相關(guān)PDF資料
PDF描述
AD628ARZ High Common-Mode Voltage, Programmable Gain Difference Amplifier
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AD628ARZ-RL High Common-Mode Voltage, Programmable Gain Difference Amplifier
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