參數(shù)資料
型號(hào)： VCA821IDRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO14
封裝： GREEN, PLASTIC, MS-012AB, SOIC-14
文件頁數(shù)： 1/36頁
文件大小： 1276K
代理商： VCA821IDRG4
VCA821
VCA821
1
FEATURES
DESCRIPTION
APPLICATIONS
R
F
+V
IN
R
G+
R
G-
-VIN
FB
R
S
20W
V
IN1
VCA821
R
G
R
1
C
1
R
S
V
IN2
R
L
C
L
V
OUT
9
6
3
0
-3
-6
-9
-12
-15
-18
-21
-24
Frequency(Hz)
Gain(dB)
1M
10M
1G
100M
InitialFrequencyResponse
oftheVCA821withRCLoad
EqualizedFrequencyResponse
www.ti.com ....................................................................................................................................... SBOS407B – DECEMBER 2007 – REVISED DECEMBER 2008
Ultra-Wideband, > 40dB Gain Adjust Range, Linear in dB
VARIABLE GAIN AMPLIFIER
23
710MHz SMALL-SIGNAL BANDWIDTH
The VCA821 is a dc-coupled, wideband, linear in dB,
(G = +2V/V)
continuously
variable,
voltage-controlled
gain
320MHz, 4V
PP BANDWIDTH (G = +10V/V)
amplifier.
It
provides
a
differential
input
to
0.1dB GAIN FLATNESS to 135MHz
single-ended conversion with a high-impedance gain
2500V/s SLEW RATE
control input used to vary the gain down 40dB from
the nominal maximum gain set by the gain resistor
> 40dB GAIN ADJUST RANGE
(RG) and feedback resistor (RF).
HIGH GAIN ACCURACY: 20dB ±0.3dB
The VCA821 internal architecture consists of two
HIGH OUTPUT CURRENT: ±90mA
input buffers and an output current feedback amplifier
stage integrated with a multiplier core to provide a
complete variable gain amplifier (VGA) system that
AGC RECEIVERS with RSSI
does not require external buffering. The maximum
DIFFERENTIAL LINE RECEIVERS
gain is set externally with two resistors, providing
flexibility in designs. The maximum gain is intended
PULSE AMPLITUDE COMPENSATION
to be set between 6dB and 32dB. Operating from ±5V
VARIABLE ATTENUATORS
supplies, the gain control voltage for the VCA821
VOLTAGE-TUNABLE ACTIVE FILTERS
adjusts the gain linearly in dB as the control voltage
varies from 0V to +2V. For example, set at a
maximum gain of 20dB, the VCA821 provides 20dB,
at VG = +2V, to less than –20dB at VG = 0V. The
VCA821 offers excellent gain linearity. For a 20dB
maximum gain, and a gain-control input voltage
varying between +1V and +2V, the gain does not
deviate by more than ±0.3dB (maximum at +25°C).
VCA821 RELATED PRODUCTS
GAIN
ADJUST
INPUT
SIGNAL
RANGE
NOISE
BANDWIDTH
Differential Equalizer
SINGLES
DUALS
(dB)
(nV/
√Hz)
(MHz)
—
80
2.4
35
—
45
1.25
80
—
45
1
80
—
52
0.8
50
—
48
4.1
50
—
40
8.2
150
—
40
6.0
420
—
40
8.2
150
—
40
6.0
420
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 Attenuators LLC.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2007–2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
VCA822 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wideband, > 40dB Gain Adjust Range, Linear in V/V VARIABLE GAIN AMPLIFIER
VCA822ID 功能描述:運(yùn)算放大器 - 運(yùn)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(bǔ)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
VCA822ID 制造商:Texas Instruments 功能描述:Variable Gain Amplifier
VCA822IDG4 功能描述:運(yùn)算放大器 - 運(yùn)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(bǔ)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
VCA822IDGS 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wideband, > 40dB Gain Adjust Range, Linear in V/V VARIABLE GAIN AMPLIFIER
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