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參數資料
| 型號： | DEM-ADS83XE |
| 英文描述： | DEM-ADS83xE - EVALUTION FIXTURE |
| 中文描述： | DEM的ADS83xE - EVALUTION夾具 |
| 文件頁數： | 2/12頁 |
| 文件大?。?/td> | 206K |
| 代理商： | DEM-ADS83XE |
2
DEM-ACF2101BP
The cycle time can be easily adjusted over a range of 50
μ
s
to 500ms by adjustment of the trigger frequency. An exter-
nal capacitor can also be added to the board so that integra-
tion capacitor values larger than 100pF can be used if
desired.
The on-board switch matrix allows the user to control the
timing of the ACF2101 RESET, HOLD, and output
SELECT switches. This board is configured at the factory
for a recommended reset time of t
PULSE
= 20
μ
s.
The table below shows selected values of input current,
cycle time, and integration capacitance needed to provide an
output of –10V.
INPUT CURRENT
0.01
μ
A
0.1
μ
A
1
μ
A
10
μ
A
10
μ
A
100
μ
A
CYCLE TIME
100ms
10ms
1ms
100
μ
s
1.1ms
110
μ
s
INTEGRATION CAPACITANCE
100pF (internal)
100pF (internal)
100pF (internal)
100pF (internal)
1100pF (internal + external)
1100pF (internal + external)
FIGURE 1. Simplified Block Diagram.
OVERVIEW
The DEM-ACF2101BP is an evaluation board designed for
simultaneous operation of both channels of the ACF2101.
Figure 1 illustrates the design of the board with a simplified
block diagram. The user provides a positive current input
signal,
±
15V and +5V DC supplies, and a trigger signal
ranging up to 20kHz. The ACF2101 output voltage is
buffered by a unity gain op amp circuit. The trigger input
controls the basic operational rate of the programmable
timing generator circuit. The on-board, user controlled,
timing generator provides control signals for the HOLD,
RESET, and SELECT switches of the ACF2101.
Both channels of the ACF2101 are configured at the factory
with a 1ms cycle time using the ACF2101’s internal 100pF
integration capacitor (C
INT
). This cycle time and integration
capacitor will provide a –10V output signal with an input
current of 1
μ
A.
1/2
ACF2101BP
Side B of
the ACF2101
C
(Installed
by user)
R
(Installed
by user)
C
(Installed
by user)
In B
C
(Installed
by user)
1/2
OPA2107
Out B
1/2
ACF2101BP
Side A of
the ACF2101
C
(Installed
by user)
R
(Installed
by user)
C
(Installed
by user)
In A
C
(Installed
by user)
1/2
OPA2107
Out A
Programmable
Timing
Generator
Trigger In
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