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參數(shù)資料
| 型號： | HS-1120RH |
| 廠商： | Intersil Corporation |
| 英文描述： | Radiation Hardened, Ultra High Speed Current Feedback Amplifier with Offset Adjust(抗輻射超高速電流反饋放大器（可調(diào)節(jié)漂移）) |
| 中文描述： | 輻射加固，超高速電流反饋放大器的偏移調(diào)整（抗輻射超高速電流反饋放大器（可調(diào)節(jié)漂移）） |
| 文件頁數(shù)： | 3/11頁 |
| 文件大小： | 119K |
| 代理商： | HS-1120RH |
3
currents are uncorrelated on current feedback amplifiers, so
this technique is inappropriate.
-I
BIAS
flows through R
F
causing an output offset error.
Likewise, any change in -I
BIAS
forces a corresponding
change in output voltage, providing the capability for output
offset adjustment. By nulling -I
BIAS
to zero, the offset error
due to this current is eliminated. In addition, an adjustment
limit greater than the -I
BIAS
limit allows the user to null the
contributions from other error sources, such as V
IO
, or +IN
source impedance. For example, the excess adjust current
of 50
μ
A [I
BN
ADJ (Min) - I
BSN
(Max)] allows for the nulling of
an additional 26mV of output offset error (with R
F
= 510
) at
room temperature. The amount of adjustment is a function of
R
F
, so adjust range increases with increased R
F
. If allowed
by other considerations, such as bandwidth and noise, R
F
can be increased to provide more adjustment range.
The recommended offset adjustment circuit is shown in
Figure 3.
FIGURE 2A. SCHEMATIC
FIGURE 2B. TOP LAYOUT
FIGURE 2C. BOTTOM LAYOUT
FIGURE 2. EVALUATION BOARD SCHEMATIC AND LAYOUT
FIGURE 3. OFFSET VOLTAGE ADJUSTMENT CIRCUIT
1
2
3
4
8
7
6
5
+5V
10
μ
F
0.1
μ
F
V
H
50
GND
GND
R
1
-5V
0.1
μ
F
10
μ
F
50
IN
OUT
V
L
500
500
V
H
+IN
V
L
V+
GND
1
V-
OUT
HS-1120RH
+
-
2
3
4
510
6
10K
5
1
V
OUT
V-
V
IN
HS-1120RH
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