參數(shù)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(diào)整范圍在V，線性音頻/視頻可變增益放大器
文件頁數(shù)： 1/35頁
文件大小： 837K
代理商： VCA822IDGS
VCA822
VCA822
1
FEATURES
150MHz SMALL-SIGNAL BANDWIDTH
(G = +10V/V)
137MHz, 5V
PP
BANDWIDTH (G = +10V/V)
0.1dB GAIN FLATNESS to 28MHz
1700V/
μ
s SLEW RATE
> 40dB GAIN ADJ UST RANGE
HIGH GAIN ACCURACY: 20dB ±0.3dB
HIGH OUTPUT CURRENT: ±160mA
DESCRIPTION
The VCA822 is a dc-coupled, wideband, linear in V/V,
continuously
variable,
amplifier.
It
provides
single-ended conversion with a high-impedance gain
control input used to vary the gain down 40dB from
the nominal maximum gain set by the gain resistor
(R
G
) and feedback resistor (R
F
).
The VCA822 internal architecture consists of two
input buffers and an output current feedback amplifier
stage integrated with a multiplier core to provide a
complete variable gain amplifier (VGA) system that
does not require external buffering. The maximum
gain is set externally with two resistors, providing
flexibility in designs. The maximum gain is intended
to be set between +2V/V and +100V/V. Operating
from ±5V supplies, the gain control voltage for the
VCA822 adjusts the gain linearly in V/V as the control
voltage varies from +1V to –1V. For example, set for
a maximum gain of +10V/V, the VCA822 provides
10V/V, at +1V input, to 0.1V/V at –1V input of gain
control range. The VCA822 offers excellent gain
linearity.
For
a
20dB
gain-control input voltage varying between 0V and
1V, the gain does not deviate by more than ±0.3dB
(maximum at +25
°
C).
APPLICATIONS
DIFFERENTIAL LINE RECEIVERS
DIFFERENTIAL EQUALIZERS
PULSE AMPLITUDE COMPENSATION
VARIABLE ATTENUATORS
VOLTAGE-TUNABLE ACTIVE FILTERS
DROP-IN UPGRADE TO LMH6503
R
F
+V
IN
R
G+
R
G
-
-
V
IN
FB
R
S
20
W
V
IN1
VCA822
R
G
R
1
C
1
R
S
V
IN2
R
L
C
L
V
OUT
9
6
-
24
Frequency (Hz)
G
1M
1G
3
-
21
-
3
0
100M
10M
-
18
-
15
-
12
-
9
-
6
Initial Frequency Response
of VCA822 with RC Load
Equalized Frequency
Response
R = 75
C = 100pF
W
VCA822
SBOS343A–SEPTEMBER 2007–REVISED OCTOBER 2007
Wideband, > 40dB Gain Adjust Range, Linear in V/V
VARIABLE GAIN AMPLIFIER
23
voltage-controlled
a
differential
gain
input
to
maximum
gain,
and
a
Table 1. VCA822 RELATED PRODUCTS
GAIN
ADJ UST
RANGE
(dB)
INPUT
NOISE
(nV/
√
Hz)
SIGNAL
BANDWIDTH
(MHz)
Figure 1. Differential Equalizer
SINGLES
DUALS
VCA810
—
80
2.4
35
—
VCA2612
45
1.25
80
—
VCA2613
45
1
80
—
VCA2615
52
0.8
50
—
VCA2617
48
4.1
50
VCA820
—
40
8.2
150
VCA821
—
40
7.0
420
VCA822
—
40
8.2
150
VCA824
—
40
7.0
420
Figure 2. Differential Equalization of an RC Load
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
X2Y is a trademark of X2Y Corporation.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 2007, Texas Instruments Incorporated
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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(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)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(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)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(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)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(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)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(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
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