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參數(shù)資料
| 型號(hào)： | LBPC |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Precision, 100uA Gain Selectable Amplifier |
| 中文描述： | 精密，100uA的可選增益放大器 |
| 文件頁(yè)數(shù)： | 14/24頁(yè) |
| 文件大小： | 352K |
| 代理商： | LBPC |
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LT1996
14
1996f
Table 3. Configuring the M Pins for Simple Inverting Gains
M81, M27, M9 Connection
Gain
M81
–0.083
Output
–0.110
Output
–0.297
Output
–0.321
Float
–0.329
Output
–0.439
Output
–2.19
Drive
–2.7
Float
–2.89
Drive
–3.21
Drive
–8.1
Drive
–9
Float
–10.8
Drive
–27
Float
–36
Float
–81
Drive
–90
Drive
–108
Drive
–117
Drive
M27
Output
Float
Drive
Output
Drive
Drive
Output
Drive
Output
Output
Float
Float
Drive
Drive
Drive
Float
Float
Drive
Drive
M9
Drive
Drive
Output
Drive
Float
Drive
Output
Output
Float
Drive
Output
Drive
Output
Float
Drive
Float
Drive
Float
Drive
Inverting Configuration
The inverting amplifier, shown in Figure 8, is another
classical op amp configuration. The circuit is actually
identical to the noninverting amplifier of Figure 4, except
that V
IN
and GND have been swapped. The list of available
gains is shown in Table 3, and some of the circuits are
shown in Figure 9. Noise gain is 1+|Gain|, as is the usual
case for inverting amplifiers. Again, for the best DC perfor-
mance, match the source impedance seen by the op amp
inputs.
4pF
4pF
–
+
R
F
R
G
V
IN
V
IN
(DRIVE)
V
OUT
V
OUT
V
= GAIN V
IN
GAIN = – R
F
/R
G
–
+
1996 F08
450k
450k
8
6
5
9
10
1
2
3
LT1996
CLASSICAL INVERTING OP AMP CONFIGURATION.
YOU PROVIDE THE RESISTORS.
CLASSICAL INVERTING OP AMP CONFIGURATION IMPLEMENTED
WITH LT1991. R
F
= 45k, R
G
= 5.55k, GAIN = –8.1.
GAIN IS ACHIEVED BY GROUNDING, FLOATING OR FEEDING BACK
THE AVAILABLE RESISTORS TO ARRIVE AT DESIRED R
F
AND R
G
.
WE PROVIDE YOU WITH <0.1% RESISTORS.
450k/81
450k/27
450k/9
450k/81
450k/27
450k/9
Figure 8. The LT1996 as a Classical Inverting Op Amp. Note the
Circuit Is Identical to the Noninverting Amplifier, Except that V
IN
and Ground Have Been Swapped
APPLICATIU
W
U
U
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