OPA111 Burr-Brown, OPA111 Datasheet - Page 10

• Manufacturer Part Number: OPA111
• Description: Low Noise Precision Difet OPERATIONAL AMPLIFIER
• Manufacturer: Burr-Brown

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