- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383947 > THS4502CDGKRG4 (Texas Instruments, Inc.) WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS PDF資料下載
參數(shù)資料
| 型號： | THS4502CDGKRG4 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS |
| 中文描述： | 寬帶，低失真全差動放大器 |
| 文件頁數(shù)： | 31/40頁 |
| 文件大?。?/td> | 609K |
| 代理商： | THS4502CDGKRG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁當(dāng)前第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁
THS4502
THS4503
SLOS352D
APRIL 2002
REVISED JANUARY 2004
www.ti.com
31
DRIVING CAPACITIVE LOADS
High-speed amplifiers are typically not well-suited for
driving large capacitive loads. If necessary, however, the
load capacitance should be isolated by two isolation
resistors in series with the output. The requisite isolation
resistor size depends on the value of the capacitance, but
10 to 25
is a good place to begin the optimization
process. Larger isolation resistors decrease the amount of
peaking in the frequency response induced by the
capacitive load, but this comes at the expense of larger
voltage drop across the resistors, increasing the output
swing requirements of the system.
Figure 114
V
S
R
S
R
g
R
f
R
f
+
R
T
+
R
iso
C
L
R
g
Riso = 10
25
V
S
V
S
R
iso
Use of Isolation Resistors With a Capacitive Load.
POWER SUPPLY DECOUPLING
TECHNIQUES AND RECOMMENDATIONS
Power supply decoupling is a critical aspect of any
high-performance amplifier design process. Careful
decoupling provides higher quality ac performance (most
notably improved distortion performance). The following
guidelines ensure the highest level of performance.
1.
Place decoupling capacitors as close to the power
supply inputs as possible, with the goal of minimizing
the inductance of the path from ground to the power
supply.
2.
Placement priority should be as follows: smaller
capacitors should be closer to the device.
3.
Use of solid power and ground planes is
recommended to reduce the inductance along power
supply return current paths.
4.
Recommended values for power supply decoupling
include 10-
μ
F and 0.1-
μ
F capacitors for each supply.
A 1000-pF capacitor can be used across the supplies
as well for extremely high frequency return currents,
but often is not required.
EVALUATION FIXTURES, SPICE MODELS,
AND APPLICATIONS SUPPORT
Texas Instruments is committed to providing its customers
with the highest quality of applications support. To support
this goal, an evaluation board has been developed for the
THS4500 family of fully differential amplifiers. The
evaluation board can be obtained by ordering through the
Texas Instruments web site, www.ti.com, or through your
local Texas Instruments sales representative. Schematic
for the evaluation board is shown below with their default
component values. Unpopulated footprints are shown to
provide insight into design flexibility.
Figure 115
_
+
26
5
3
7
V
OCM
V
S
PwrPad
V
S
PD
1
8
R0805
R4
C4C0805
R5 R0805
C3
C0805
R6
R7
R0805
R0805
C5
C6
CC7
J2
J3
J2
J3
R2
R0805
R0805
R3
C1
C0805
C2
C0805
R1
R1206
J1
3
1
4
5
6
R11
R1206
R0R9
R8
R9
R0805
R0805
J2
J4
T1
U1
THS4
Simplified Schematic of the Evaluation Board. Power
Supply Decoupling, V
OCM,
and Power Down Circuitry
Not Shown
Computer simulation of circuit performance using SPICE
is often useful when analyzing the performance of analog
circuits and systems. This is particularly true for video and
RF amplifier circuits where parasitic capacitance and
inductance can have a major effect on circuit performance.
A SPICE model for the THS4500 family of devices is
available through the Texas Instruments web site
(www.ti.com). The PIC is also available for design
assistance and detailed product information. These
models do a good job of predicting small-signal ac and
transient performance under a wide variety of operating
conditions. They are not intended to model the distortion
characteristics of the amplifier, nor do they attempt to
distinguish between the package types in their
small-signal ac performance. Detailed information about
what is and is not modeled is contained in the model file
itself.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| THS4502CDGKT | WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS |
| THS4502CDGNT | WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS |
| THS4502CDR | WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS |
| THS4502CDRG4 | WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS |
| THS4502CDT | WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| THS4502CDGKT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS |
| THS4502CDGN | 功能描述:特殊用途放大器 HS Full Diff RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| THS4502CDGNDT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS |
| THS4502CDGNG4 | 功能描述:特殊用途放大器 HS Full Diff RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| THS4502CDGNR | 功能描述:特殊用途放大器 Hi-Sp Fully-Diff Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。