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參數(shù)資料
| 型號： | CA5160E |
| 廠商： | INTERSIL CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | 4MHz, BiMOS Microprocessor Operational Amplifiers with MOSFET Input/CMOS Output |
| 中文描述： | OP-AMP, 15000 uV OFFSET-MAX, 4 MHz BAND WIDTH, PDIP8 |
| 封裝： | PLASTIC, MS-001BA, DIP-8 |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 910K |
| 代理商： | CA5160E |
3-15
Picoammeter Circuit
Figure 14 is a current-to-voltage converter configuration uti-
lizing a CA5160 and CA3140 to provide a picoampere meter
for
±
3pA full-scale meter deflection. By placing Terminals 2
and 4 of the CA5160 at ground potential, the CA5160 input
is operated in the “guarded mode”. Under this operating con-
dition, even slight leakage resistance present between Ter-
minals 3 and 2 or between Terminals 3 and 4 would result in
0V across this leakage resistance, thus substantially reduc-
ing the leakage current.
If the CA5160 is operated with the same voltage on input
Terminals 3 and 2 as on Terminal 4, a further reduction in the
input current to the less than 1pA level can be achieved as
shown in Figure 1.
To further enhance the stability of this circuit, the CA5160
can be operated with its output (Terminal 6) near ground,
thus markedly reducing the dissipation by reducing the sup-
ply 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 con-
sisting 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 the volt-
meter circuit shown in Figure 11, a current range of 3pA to
1nA full scale can be handled with the single 10G
resistor.
Single Supply Sample-and-Hold System
Figure 15 shows a single-supply sample-and-hold system
using a CA5160 to provide a high input impedance and an
input-voltage range of 0V to 10V. The output from the input
buffer integrator network is coupled to a CA3080A. The
CA3080A functions as a strobeable current source for the
CA3140 output integrator and storage capacitor. The CA3140
was chosen because of its low output impedance and con-
stant gain-bandwidth product. Pulse “droop” during the hold
interval can be reduced to zero by adjusting the 100k
bias-
voltage potentiometer on the positive input of the CA3140.
This zero adjustment sets the CA3080A output voltage at its
zero current position. In this sample-and-hold circuit it is
essential that the amplifier bias current be reduced to zero to
minimize output signal current during the hold mode. Even
with 320mV at the amplifier bias circuit (Terminal 5) at least
±
100pA of output current will be available.
Wien Bridge Oscillator
A simple, single-supply Wien Bridge oscillator using a CA5160
is shown in Figure 16. A pair of parallel-connected 1N914
diodes comprise the gain-setting network which standardizes
the output voltage at approximately 1.1V. The 500
potentiom-
eter is adjusted so that the oscillator will always start and the
oscillation will be maintained. Increasing the amplitude of the
FIGURE 15B. SAMPLE AND HOLD WAVEFORM
FIGURE 15C. SAMPLE AND HOLD WAVEFORM
FIGURE 15. SINGLE SUPPLY SAMPLE AND HOLD SYSTEM, INPUT 0V TO 10V
SAMPLED
OUTPUT
INPUT
SIGNAL
SAMPLING
PULSES
Top Trace: Sampled Output
Center Trace: Input Signal
Bottom Trace: Sampling Pulses
SAMPLED
OUTPUT
0V-
INPUT
0V-
SAMPLING
PULSE
Top Trace: Sampled Output
Center Trace: Input
Bottom Trace: Sampling Pulses
4
CA5160
-
+
7
6
0.01
μ
F
2k
f =
1
2
π √
(R
1
|| R
2
) C
1
R
3
C
2
R
1
100k
R
3
51k
+15V
R
2
100k
C
1
10-80pF
680
500
0.1
μ
F
C
2
51pF
OUTPUT
f = 100kHz
2% THD AT 1.1V
P-P
2-1N914
3
2
+15V
FIGURE 16. SINGLE-SUPPLY WEIN BRIDGE OSCILLATOR
CA5160
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CA5160M | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CA5160M96 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:4MHz, BiMOS Microprocessor Operational Amplifiers with MOSFET Input/CMOS Output |
| CA5160S | 制造商:HAR 功能描述:integrated circuit metal can 8 pin |
| CA5170 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| CA5180 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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