Datasheet

10OPA111
®
FIGURE 7. Zero-Bias Schottky Diode Square-Law RF
Detector.
X-Ray Tube
Collimator
X-Rays (Pencil Beam)
Light Rays
Scintillation Crystal
Pin Photodiode
OPA111
e
O
= 50mV
6
3
2
100MΩ
R
F
I
IN
500pA
e
O
= –I
IN
R
F
FIGURE 8. Computerized Axial Tomography (CAT) Scan-
ner Channel Amplifier.
FIGURE 9. High Impedance (10
14
Ω) Amplifier.
FIGURE 10. Sensitive Photodiode Amplifier.
FIGURE 11. 60Hz Reject Filter.
FIGURE 12. Piezoelectric Transducer Charge Amplifier.
FIGURE 13. 0.6Hz Second-Order Low-Pass Filter.
OPA111
2
3
6
DC
Output
1000pF
10kΩ
1MΩ
e
O
100Ω
H-P
HSCH-3486
RFC
–46dBm to
–20dBm
RF Input
Video bandwidth: DC to 50kHz
e
O
≈ 1200mVDC/µW
OPA111
6
3
2
500Ω 9.5kΩ
8
7
4
5
1
+15V
–15V
Guard
Offset Trim
100kΩ
1VDC
Output
pH Probe
R ≈ 500MΩ
50mV Output
OPA111BM
2
3
Output
6
5.34MΩ*
2.67MΩ*
5.34MΩ*
1000pF
500pF500pF
Input
Offset voltage =
255µVDC maximum
with no offset adjust.
*For 50Hz use:
3.16MΩ and 6.37MΩ
Q
2kΩ
OPA111
2
3
8
6
Out
1µF
187.5kΩ
375.1kΩ
375.1kΩ
In
1µF
F
C
= 0.6Hz
–80dB at 60Hz
OPA111
2
3
Output
100pF
8
100pF
R
F
C
F
e
O
∆Q
Low frequency cutoff =
1/(2 π R
F
C
F
) = 0.16Hz
6
10
10
Ω
10
10
Ω
e
O
= –∆Q/C
F
OPA111
2
3
6
Output
7
<1pF to prevent gain peaking.
1000MΩ
1000MΩ
8
+15V
0.1µF
0.1µF
–15V
4
0.01µF
Circuit must be well shielded.
Guard
H-P 5082-4204
Pin Photodiode
5 x 10
8
V/W