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參數資料
| 型號： | IVC102P |
| 元件分類： | 跨阻放大器 |
| 英文描述： | PRECISION SWITCHED INTEGRATOR TRANSIMPEDANCE AMPLIFIER |
| 中文描述： | 精密投切積分器互阻抗放大器 |
| 文件頁數： | 10/10頁 |
| 文件大小： | 124K |
| 代理商： | IVC102P |
10
IVC102
The input resistance seen at pin 2 includes an additional
1.5k
, the on-resistance of S
1
. The total input resistance is
the sum of the switch resistance and R
IN
, or 2.5k
in this
example.
Slew rate limit of the internal op amp is approximately
3V/
μ
s. For most applications, the slew rate of V
OUT
should
be limited to 1V/
μ
s or less. The rate of change is propor-
tional to I
IN
and inversely proportional to C
INT
:
This can be important in some applications since the slew-
induced input voltage is applied to the sensor or signal
source. The slew-induced input voltage can be reduced by
increasing C
INT
, which reduces the output slew rate.
NONLINEARITY
Careful nonlinearity measurements of the IVC102 yield
typical results of approximately
±
0.005% using the internal
input capacitors (C
INT
= 100pF). Nonlinearity will be de-
graded by using an external integrator capacitor with poor
voltage coefficient. Performance with the internal capacitors
is typically equal or better than the sensors it is used to
measure. Actual application circuits with sensors such as a
photodiode may have other sources of nonlinearity.
1/10T
INT
1/T
INT
Frequency
10/T
INT
G
G
G
–20dB/decade
slope
0
–10
–20
–30
–40
–50
F
Corner at
f = 0.32/T
INT
–3dB at
f = 0.44/T
INT
FIGURE 5. Frequency Response of Integrating Converter.
Slew Rate
=
I
IN
C
INT
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