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參數(shù)資料
| 型號： | OPA2690IDBV |
| 英文描述： | Dual, Wideband, Voltage-Feedback OPERATIONAL AMPLIFIER with Disable |
| 中文描述： | 雙路，寬帶，電壓反饋運算放大器具有禁用 |
| 文件頁數(shù)： | 18/30頁 |
| 文件大小： | 494K |
| 代理商： | OPA2690IDBV |
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SBOS238D JUNE 2002 REVISED DECEMBER 2004
www.ti.com
18
The frequency response for a 10MHz Butterworth filter is
shown in Figure 10. One advantage for using this type of
filter is the independent setting of W
O
and Q. Q can be
easily adjusted by changing the R
3A, B
resistors without
affecting W
O
.
G
Frequency (MHz)
0.1
1
10
20
1
0
1
2
3
4
5
6
7
8
9
Figure 10. Multiple Feedback Filter Frequency
Response
SINGLE-SUPPLY DIFFERENTIAL ADC
DRIVER
The single-supply differential ADC driver shown on the
front page is ideal for driving high-frequency ADCs. As
shown in the plot on the front page,
Harmonic Distortion vs
Frequency for the Single-Supply Differential ADC Driver
,
the 2nd-harmonic reacts as expected and drops to a
95dBc at 1MHz and 87dBc at 5MHz—a significant
improvement in going to differential from single-ended.
The circuit shown on the front page has a 195MHz, 3dB
bandwidth that can be easily bandlimited by using a
capacitor in parallel with the feedback resistors. Refer to
Figure 11 for more details. The 3dB frequency is given by
Equation 5.
f
3dB
1
2 R
F
C
F
D
Frequency (MHz)
9
6
3
0
3
6
9
12
0.1
10
1
500
100
C
F
= 8.6pF
Figure 11. Single-Supply Differential ADC Driver
For example, C
F
= 8.6pF in parallel with R
F
= 402
will
control the 3dB frequency to 18MHz.
DESIGN-IN TOOLS
DEMONSTRATION BOARDS
Several PC boards are available to assist in the initial
evaluation of circuit performance using the OPA2690 in its
two package styles. Both of these are available, free, as
unpopulated PC boards delivered with descriptive
documentation. The summary information for each board
is shown below:
PRODUCT
OPA2690ID
OPA2690IDBV
PACKAGE
SO-8
SO-14
BOARD PART
NUMBER
DEM-OPA268xU
DEM-OPA268xN
LITERATURE
REQUEST
NUMBER
SBOU003
SBOU002
Consult the Texas Instruments web site (www.ti.com) to
request either of these boards.
(5)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA2690IDG4 | 功能描述:高速運算放大器 Dual Wideband Voltage Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓: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 |
| OPA2690IDR | 功能描述:高速運算放大器 Dual Wide Band RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓: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 |
| OPA2690IDRG4 | 功能描述:高速運算放大器 Dual Wideband Voltage Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓: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 |
| OPA2691I-14D | 功能描述:高速運算放大器 Dual Wideband Current Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓: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 |
| OPA2691I-14DG4 | 功能描述:高速運算放大器 Dual Wideband Current Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓: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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