參數資料
型號： VCA822IDGS
廠商： Texas Instruments, Inc.
英文描述： Wideband, > 40dB Gain Adjust Range, Linear in V/V VARIABLE GAIN AMPLIFIER
中文描述： 寬帶，“40dB的增益調整范圍在V，線性音頻/視頻可變增益放大器
文件頁數： 24/35頁
文件大?。?/td> 837K
代理商： VCA822IDGS
www.ti.com
PACKAGE CONSIDERATIONS
3
0
-
3
-
6
-
9
-
12
Frequency (MHz)
N
0
50
100
200
A
VMAX
= 2V/V
A
VMAX
= 50V/V
A
VMAX
= 100V/V
A
VMAX
= 5V/V
A
VMAX
= 10V/V
A
VMAX
= 20V/V
150
50
W
R
F
50
W
V
G
V
IN
50
W
Source
R
G
50
W
Load
V
OUT
R
1
R
2
R
3
+V
IN
-
V
IN
R
G
-
R
G+
3
0
-
3
-
6
-
9
-
12
Frequency (MHz)
N
0
50
100
200
A
= 2V/V
VMAX
A
= 50V/V
VMAX
A
= 100V/V
VMAX
A
= 5V/V
VMAX
A
= 10V/V
VMAX
A
= 20V/V
VMAX
150
MAXIMUM GAIN OF OPERATION
I
=
RG
V
OUT
A
R
′
V
MAX
G
(8)
VCA822
SBOS343A–SEPTEMBER 2007–REVISED OCTOBER 2007
The
MSOP-10 packages. Each package has, for the
different gains used in the typical characteristics,
different values of R
F
and R
G
in order to achieve the
same
performance
detailed
Characteristics
table.
VCA822
is
available
in
both
SO-14
and
in
the
Electrical
Figure 88
shows a test gain circuit for the VCA822.
Table 3
lists the recommended configuration for the
SO-14 and MSOP-10 package.
Figure 89. SO-14 Recommended R
F
and R
G
versus A
VMAX
Figure 88. Test Circuit
Table 3. SO-14 and MSOP-10 R
F
and R
G
Configurations
G = 2
1.33k
1.33k
G = 10
1k
200
G = 100
845
16.9
R
F
R
G
Figure 90. MSOP-10 Recommended R
F
and R
G
versus A
VMAX
There are no differences between the packages in
the recommended values for the gain and feedback
resistors.
However,
the
VCA822IDGS (MSOP-10 package) is lower than the
bandwidth for the VCA822ID (SO-14 package). This
difference is true for all gains, but especially true for
gains greater than 5V/V, as can be seen in
Figure 89
and
Figure 90
. Note that the scale must be changed
to a linear scale to view the details.
bandwidth
for
the
This section describes the use of the VCA822 in a
fixed-gain application in which the V
G
control pin is
set at V
G
= +1V. The tradeoffs described here are
with bandwidth, gain, and output voltage range.
In the case of an application that does not make use
of the V
GAIN
, but requires some other characteristic of
the VCA822, the R
G
resistor must be set such that
the maximum current flowing through the resistance
I
RG
is less than ±2.6mA typical, or 5.2mA
PP
as
defined in the
Electrical Characteristics
table, and
must follow
Equation 8
.
24
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Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s):
VCA822
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參數描述
VCA822IDGSR 功能描述:運算放大器 - 運放 WB >40dB Gain Adj Rng Lin V/V Var Gain RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
VCA822IDGSRG4 功能描述:運算放大器 - 運放 WB >40dB Gain Adj Rng Lin V/V Var Gain RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
VCA822IDGST 功能描述:運算放大器 - 運放 WB >40dB Gain Adj Rng Lin V/V Var Gain RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
VCA822IDGSTG4 功能描述:運算放大器 - 運放 WB >40dB Gain Adj Rng Lin V/V Var Gain RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
VCA822IDR 功能描述:運算放大器 - 運放 WB >40dB Gain Adj Rng Lin V/V Var Gain RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
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