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參數(shù)資料
| 型號(hào)： | 5962F9675601VPX |
| 廠商： | INTERSIL CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, CDIP8 |
| 封裝： | CERAMIC, DIP-8 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 119K |
| 代理商： | 5962F9675601VPX |
3
currents are uncorrelated on current feedback ampliers, so
this technique is inappropriate.
-IBIAS ows through RF causing an output offset error.
Likewise, any change in -IBIAS forces a corresponding
change in output voltage, providing the capability for output
offset adjustment. By nulling -IBIAS to zero, the offset error
due to this current is eliminated. In addition, an adjustment
limit greater than the -IBIAS limit allows the user to null the
contributions from other error sources, such as VIO, or +IN
source impedance. For example, the excess adjust current
of 50
A [IBNADJ (Min) - IBSN (Max)] allows for the nulling of
an additional 26mV of output offset error (with RF = 510) at
room temperature. The amount of adjustment is a function of
RF, so adjust range increases with increased RF. If allowed
by other considerations, such as bandwidth and noise, RF
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
F
0.1
F
VH
50
GND
R1
-5V
0.1
F
10
F
50
IN
OUT
VL
500
VH
+IN
VL
V+
GND
1
V-
OUT
HS-1120RH
-
+
2
3
4
510
6
10K
5
1
VOUT
V-
VIN
HS-1120RH
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