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參數(shù)資料
| 型號(hào)： | IVC102U |
| 英文描述： | RES,Carbon Film,15KOhms,350WV,5+/-% Tol |
| 中文描述： | 精密投切積分器互阻抗放大器 |
| 文件頁(yè)數(shù)： | 7/10頁(yè) |
| 文件大小： | 124K |
| 代理商： | IVC102U |
7
IVC102
60pF
30pF
10pF
0.1μF
0.1μF
1
I
Photodiode
Sensor
R
C
2
3
4
5
6
11
I: Signal - Dependent Current
R: Sensor Resistance
C: Sensor Capacitance
12
13
10
V
O
14
V+
+15V
S
1
S
1
C
1
C
2
C
3
S
2
S
2
9
–15V
V–
Digital
Data
A/D
Converter
See timing
signals below
3a
3b
3c
Charge transferred
from sensor C
to C
INT
.
A
A
B
B
Transfer Function
Offset Voltage
Ramp due to
input bias current
(exaggerated).
Effective
Signal Integration
Period, T
S
V
waveform with
approx. half-scale input current.
V
waveform with
zero input current.
Q
S
1
Opening
0V
0V
0V
V
O
S
2
S
1
V
O
0V
+10mV
–10mV
10μs
Hold
10μs
Reset
10μs
Hold
10μs
Reset
10μs
Pre-Int.
Hold
Q
S
2
Opening
Q
S
1
Closing
Op Amp
V
OS
(S
1
Open)
(S
1
Closed)
(S
2
Open)
FIGURE 3. Switched-Input Measurement Technique.
Input connections and timing are shown in Figure 3.
The timing diagram, Figure 3b, shows that S
1
is closed only
when S
2
is open. During the short period that S
1
is open
(30
μ
s in this timing example), any signal current produced
by the sensor will charge the sensor’s source capacitance.
This charge is then transferred to C
INT
when S
1
is closed. As
a result, no charge produced by the sensor is lost and the
input signal is continuously integrated. Even fast input
pulses are accurately integrated.
SWITCHED-INPUT MEASUREMENT TECHNIQUE
While the basic reset-and-integrate measurement arrange-
ment in Figure 1 is satisfactory for many applications, the
switched-input timing technique shown in Figure 3 has
important advantages. This method can provide continuous
integration of the input signal. Furthermore, it can hold the
output voltage constant after integration for stable conver-
sion (desirable for a/d converter without a sample/hold).
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| IVC102U | 制造商:Texas Instruments 功能描述:AMP INTEG TRANSIMPEDANCE SOIC14 |
| IVC102U/2K5 | 功能描述:跨阻抗放大器 Prec Swtched Integ Transimpedance RoHS:否 制造商:Texas Instruments 封裝 / 箱體:SOIC-14 帶寬:3 MHz 工作電源電壓:36 V 電源電流:5.5 mA 工作溫度范圍:- 40 C to + 85 C 封裝:Tube |
| IVC102U/2K5G4 | 功能描述:跨阻抗放大器 Prec Swtched Integ Transimpedance RoHS:否 制造商:Texas Instruments 封裝 / 箱體:SOIC-14 帶寬:3 MHz 工作電源電壓:36 V 電源電流:5.5 mA 工作溫度范圍:- 40 C to + 85 C 封裝:Tube |
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| IVC-26 | 制造商:PUI Audio 功能描述:INDICATOR VOLUME CONTROL - Bulk |
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