參數(shù)資料
型號(hào)： OPA832IDR
英文描述： Low-Power, Single-Supply, Fixed-Gain Video Buffer Amplifier
中文描述： 低功耗，單電源，固定增益視頻緩沖放大器
文件頁(yè)數(shù)： 15/26頁(yè)
文件大?。?/td> 471K
代理商： OPA832IDR
"#$
SBOS266B JUNE 2003 REVISED SEPTEMBER 2004
www.ti.com
15
OPA832
+5V
5V
V
OUT
50
V
IN
R
F
400
175
50
Source
150
R
400
6.8
μ
F
+
6.8
μ
F
+
0.1
μ
F
0.1
μ
F
0.01
μ
F
Figure 3. DC-Coupled, G = +2, Bipolar Supply
Specification and Test Circuit
DESIGN-IN TOOLS
DEMONSTRATION BOARDS
Several PC boards are available to assist in the initial
evaluation of circuit performance using the OPA832 in its
two package styles. All of these are available, free, as
unpopulated PC boards delivered with descriptive
documentation. The summary information for these
boards is shown in Table 1.
Table 1. Demo Board Availability
PRODUCT
PACKAGE
DEMO BOARD
NUMBER
ORDERING
NUMBER
OPA832ID
SO-8
DEM
-
OPA68xU
SBOU009
OPA832IDBV
SOT23-5
DEM
-
OPA6xxN
SBOU010
Go to the TI web site (www.ti.com) to request evaluation
boards through the OPA832 product folder.
MACROMODEL AND APPLICATIONS
SUPPORT
Computer simulation of circuit performance using SPICE
is often a quick way to analyze the performance of the
OPA832 and its circuit designs. This is particularly true for
video and RF amplifier circuits where parasitic
capacitance and inductance can play a major role on
circuit performance. A SPICE model for the OPA832 is
available through the TI web page (www.ti.com). The
applications department is also available for design
assistance. These models predict typical small signal AC,
transient steps, DC performance, and noise under a wide
variety of operating conditions. The models include the
noise terms found in the electrical specifications of the
data sheet. These models do not attempt to distinguish
between the package types in their small-signal AC
performance.
GAIN OF +2V/V VIDEO LINE DRIVER
One of the most suitable applicarions for the OPA832 is a
simple gain of 2 video line driver. Figure 4 shows how
simple this circuit is to implement, shown as a
±
5V
implementation. Single +5V operation is similar with
blocking caps and DC common-mode biasing provided.
OPA832
Video
In
Video
Loads
+5V
5V
Optional 1.3k
PullDown
Figure 4. Gain of 2 Video Line Driver
One optional element is shown in Figure 4. A 1.3k
pull-down to the negative supply will improve the
differential phase significantly and the differential gain
slightly. Figure 5 shows measured dG/dP with and without
that pull-down resistor from 1 to 4 video loads.
1.2
1.0
0.8
0.6
0.4
0.2
0
Number of 150
Loads
d
1
2
3
4
dG
dP
dG
dP
No PullDown
With 1.3k
PullDown
OPA832
Video
In
Video
Loads
+5V
5V
Optional 1.3k
PullDown
Figure 5. dG/dP vs Video Loads
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
OPA832IDRG4 功能描述:視頻放大器 Lo-Pwr Single-Supply Fixed-Gain Video Bfr RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類(lèi)型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel
OPA835 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Ultra Low-Power, Rail-to-Rail Out, Negative Rail In, VFB Op Amp
OPA835_1110 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Ultra Low-Power, Rail-to-Rail Out, Negative Rail In, VFB Op Amp
OPA835_12 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Ultra Low-Power, Rail-to-Rail Out, Negative Rail In, VFB Op Amp
OPA835IDBVEVM 功能描述:放大器 IC 開(kāi)發(fā)工具 OPA835 in DBV pckg EVM RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類(lèi)型:Power Amplifiers 工具用于評(píng)估:IR4302 工作電源電壓:13 V to 23 V
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