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參數(shù)資料
| 型號： | THS4500CDGK |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 運動控制電子 |
| 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)： | 22/37頁 |
| 文件大?。?/td> | 585K |
| 代理商： | THS4500CDGK |
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SLOS350D APRIL 2002 REVISED JANUARY 2004
www.ti.com
22
Figure 98
VOCM
+VS
VS
RS
Rg1
Rg2
Rf1
Rf2
+
RT
+
VS
Application Circuit for the THS4500 and THS4501,
Featuring Split-Supply Operation With an Input
Signal Referenced at the Midrail
Equations 15 allow for calculation of the required input
common-mode range for a given set of input conditions.
The equations allow calculation of the input common-
mode range requirements given information about the
input signal, the output voltage swing, the gain, and the
output common-mode voltage. Calculating the maximum
and minimum voltage required for V
N
and V
P
(the
amplifier’s input nodes) determines whether or not the
input common-mode range is violated or not. Four
equations are required. Two calculate the output voltages
and two calculate the node voltages at V
N
and V
P
(note
that only one of these needs calculation, as the amplifier
forces a virtual short between the two nodes).
V
IN
(1–
β
)–V
IN–
(1–
β
)
2
β
V
OUT
2V
OCM
β
V
OUT–
–V
IN
(1–
β
)
V
IN–
(1–
β
)
2
β
V
OUT
β
2V
OCM
β
(1)
(2)
V
N
V
IN–
(1–
β
)
Where:
β
R
G
R
F
R
G
V
P
V
IN
(1–
β
)
V
OUT–
β
(3)
(4)
(5)
NOTE:
The equations denote the device inputs as V
N
and
V
P
, and the
circuit
inputs as V
IN+
and V
IN
.
Figure 99
VOCM
Rg
Rg
Rf
Rf
+
+
Vp
Vn
VOUT
VOUT+
VIN+
VIN
Diagram For Input Common-Mode Range Equations
The two tables below depict the input common-mode
range requirements for two different input scenarios, an
input referenced around the negative rail and an input
referenced around midrail. The tables highlight the
differing requirements on input common-mode range, and
illustrate reasoning for choosing either the THS4500/1 or
the THS4502/3. For signals referenced around the
negative power supply, the THS4500/1 should be chosen
since its input common-mode range includes the negative
supply rail. For all other situations, the THS4502/3 offers
slightly improved distortion and noise performance for
applications with input signals centered between the
power supply rails.
Table 1. Negative-Rail Referenced
Gain
(V/V)
VIN+ (V)
VIN
(V)
VIN
(VPP)
VOCM
(V)
VOD
(VPP)
VNMIN
(V)
VNMAX
(V)
1
2.0 to
2.0
0
4
2.5
4
0.75
1.75
2
1.0 to
1.0
0
2
2.5
4
0.5
1.167
4
0.5 to
0.5
0
1
2.5
4
0.3
0.7
8
0.25 to
0.25
0
0.5
2.5
4
0.167
0.389
NOTE: This table assumes a negative-rail referenced, single-ended
input signal on a single 5-V supply as shown in Figure 97.
VNMIN = VPMIN and VNMAX = VPMAX.
Table 2. Midrail Referenced
Gain
(V/V)
VIN+ (V)
VIN
(V)
VIN
(VPP)
VOCM
(V)
VOD
(VPP)
VNMIN
(V)
VNMAX
(V)
1
0.5 to
4.5
2.5
4
2.5
4
2
3
2
1.5 to
3.5
2.5
2
2.5
4
2.16
2.83
4
2.0 to
3.0
2.5
1
2.5
4
2.3
2.7
8
2.25 to
2.75
2.5
0.5
2.5
4
2.389
2.61
NOTE: This table assumes a midrail referenced, single-ended input
signal on a single 5-V supply.
VNMIN = VPMIN and VNMAX = VPMAX.
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|---|---|
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| THS5641ADW | 8-BIT, 100 MSPS, CommsDACE DIGITAL-TO-ANALOG CONVERTER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| THS4500CDGKG4 | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| THS4500CDGKR | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| THS4500CDGKRG4 | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| THS4500CDGN | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| THS4500CDGNG4 | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
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