參數(shù)資料
型號(hào)： THS4211DRB
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
封裝： PLASTIC, MSOP-8
文件頁(yè)數(shù)： 22/40頁(yè)
文件大?。?/td> 1013K
代理商： THS4211DRB
THS4211
THS4215
SLOS400C SEPTEMBER 2002 REVISED JANUARY 2004
www.ti.com
29
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, evaluation boards have been developed for the
THS4211 operational amplifier. Three evaluation boards
are available: one THS4211 and one THS4215, both
configurable for different gains, and a third for a gain of +1
(THS4211 only). These boards are easy to use, allowing
for straightforward evaluation of the device. These
evaluation boards can be ordered through the Texas
Instruments web site, www.ti.com, or through your local
Texas Instruments sales representative. Schematics for
the evaluation boards are shown below.
The THS4211/THS4215 EVM board shown in Figure 96
through
Figure
99
accommodates
different
gain
configurations. Its default component values are set to
give a gain of 2. The EVM can be configured in a gain of
+1; however, it is strongly not recommended. Evaluating
the THS4211/THS4215 in a gain of +1 using this EVM may
cause the part to become unstable. The stability of the
device can be controlled by adding a large resistor in the
feedback path, but the performance is sacrificed.
Figure 93 shows the small signal frequency response of
the THS4211 with different feedback resistors in the
feedback path. Figure 94 is the small frequency response
of the THS4211 using the gain of +1 EVM.
Figure 93. Frequency Response vs Feedback
Resistor Using the EDGE #6439527 EVM
5
3
1
3
5
7
9
11
13
15
17
10 M
100 M
1 G
f Frequency Hz
Small
Signal
Gain
dB
10 G
_
+
Rf
49.9
499
PIN = 7 dBm
VS = ±5 V
Rf = 200
Rf = 100
Rf = 0
Rf = 50
Figure 94. Frequency Response Using the
EDGE # 6443547 G = +1 EVM
4
3
2
1
0
1
2
3
4
5
100 k
1 M
10 M
100 M
1 G
10 G
f Frequency Hz
Small
Signal
Gain
dB
_
+
49.9
499
PIN = 7 dBm
VS = ±5 V
The peaking in the frequency response is due to the lead
inductance in the feedback path. Each pad and trace on a
PCB has an inductance associated with it, which in
conjunction with the inductance associated with the
package may cause peaking in the frequency response,
causing the device to become unstable.
In order to achieve the maximum performance of the
device, PCB layout is very critical. Texas Instruments has
developed an EVM for the evaluation of the THS4211 in a
gain of 1. The EVM is shown in Figure 101 through
Figure 104. This EVM is designed to minimize peaking in
the unity gain configuration.
Minimizing the inductance in the feedback path is critical
for reducing the peaking of the frequency response in unity
gain. The recommended maximum inductance allowed in
the feedback path is 4 nH. This inductance can be
calculated by using equation 7:
L(nH)
+ K ln 2
W
) T )
0.223 W ) T
) 0.5
where
W = Width of trace in inches.
= Length of the trace in inches
.
T = Thickness of the trace in inches.
K = 5.08 for dimensions in inches, and K = 2 for dimensions
in cm.
(7)
相關(guān)PDF資料
PDF描述
THS4215DRB 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4215DG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4215DGNR 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4215DGN 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4215DRBR 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS4211DRBR 功能描述:高速運(yùn)算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4211DRBRG4 功能描述:高速運(yùn)算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4211DRBT 功能描述:高速運(yùn)算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4211DRBTG4 功能描述:高速運(yùn)算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4211DRG4 功能描述:高速運(yùn)算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
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