參數(shù)資料
型號(hào)： CA3160AE
廠商： HARRIS SEMICONDUCTOR
元件分類： 運(yùn)動(dòng)控制電子
英文描述： 4MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output
中文描述： OP-AMP, 5000 uV OFFSET-MAX, 4 MHz BAND WIDTH, PDIP8
文件頁(yè)數(shù)： 13/17頁(yè)
文件大小： 926K
代理商： CA3160AE
13
input current to the less than one picoampere level can be
achieved as shown in Figure 23.
To further enhance the stability of this circuit, the CA3160
can be operated with its output (Terminal 6) near ground,
thus markedly reducing the dissipation by reducing the
supply current to the device.
The CA3140 stage serves as a X100 gain stage to provide
the required plus and minus output swing for the meter and
feedback network. A 100-to-1 voltage divider network
consisting of a 9.9k
resistor in series with a 100
resistor
sets the voltage at the 10G
resistor (in series with Terminal
3) to
±
30mV full-scale deflection. This 30mV signal results
from
±
3V appearing at the top of the voltage divider network
which also drives the meter circuitry.
By utilizing a switching technique in the meter circuit and in
the 9.9k
and 100
network similar to that used in voltmeter
circuit shown in Figure 8, a current range of 3pA to 1nA full
scale can be handled with the single 10G
resistor.
STAIRCASE
OUTPUT
2V STEPS
COMPARATOR
OSCILLATOR
Top Trace: Staircase Output 2V Steps
Center Trace: Comparator
Bottom Trace: Oscillator
FIGURE 10B. STAIRCASE GENERATOR WAVEFORM
FIGURE 10. STAIRCASE GENERATOR CIRCUIT
4
1
7
CA3160
-
+
6
10M
+15V
100k
10k
5
2
4
6
7
CA3140
+
-
3
1M
M
9.9k
5.6k
500-0-500
μ
A
-15V
560k
9.1k
500
100
+15V
10G
10pF
0.1
μ
F
2
0.1
μ
F
3
-15V
FIGURE 11. CURRENT-TO-VOLTAGE CONVERTER TO PROVIDE A PICOAMMETER WITH
±
3pA FULL SCALE DEFLECTION
4
1
7
CA3160
-
+
1M
+15V
100k
5
9.1k
2
0.1
μ
F
3
6
0.1
μ
F
2
6
3
4
CA3080A
+
-
7
5
2
3
4
CA3140
+
-
7
6
+15V
0.1
μ
F
39k
2200pF
8.2
1M
100k
27k
STROBE INPUT
500
μ
A
DROOP
ZERO
ADJUST
SAMPLE =
HOLD =
15V
0V
100k
30pF
39k
0.1
μ
F
1N914
OFFSET
VOLTAGE
ADJUST
8.2k
2k
0.1
μ
F
+15V
FIGURE 12A. SINGLE SUPPLY SAMPLE AND HOLD SYSTEM, INPUT 0V TO 10V
8
CA3160, CA3160A
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