參數(shù)資料
型號(hào)： OPA3690
英文描述： DIODE ZENER SINGLE 1000mW 9.1Vz 28mA-Izt 0.05 10uA-Ir 7Vr DO41-GLASS 5K/REEL
中文描述： 低功耗，單電源，寬帶運(yùn)算放大器
文件頁數(shù)： 22/31頁
文件大?。?/td> 460K
代理商： OPA3690
"#$
SBOS263B AUGUST 2004 REVISED JANUARY 2005
www.ti.com
22
SINGLE-SUPPLY ACTIVE FILTER
The OPA830, while operating on a single +3V or +5V
supply, lends itself well to high-frequency active filter
designs. Again, the key additional requirement is to
establish the DC operating point of the signal near the
supply midpoint for highest dynamic range. Figure 8
shows an example design of a 1MHz low-pass Butterworth
filter using the Sallen-Key topology.
Both the input signal and the gain setting resistor are
AC-coupled using 0.1
μ
F blocking capacitors (actually
giving bandpass response with the low-frequency pole set
to 32kHz for the component values shown). As discussed
for Figure 1, this allows the midpoint bias formed by the
two 1.87k
resistors to appear at both the input and output
pins. The midband signal gain is set to +4 (12dB) in this
case. The capacitor to ground on the noninverting input is
intentionally set larger to dominate input parasitic terms. At
a gain of +4, the OPA830 on a single supply will show
30MHz small- and large-signal bandwidth. The resistor
values have been slightly adjusted to account for this
limited bandwidth in the amplifier stage. Tests of this circuit
show a precise 1MHz, 3dB point with a maximally-flat
passband (above the 32kHz AC-coupling corner), and a
maximum stop band attenuation of 36dB at the amplifier’s
3dB bandwidth of 30MHz.
DESIGN-IN TOOLS
DEMONSTRATION BOARDS
Several PC boards are available to assist in the initial
evaluation of circuit performance using the OPA830 in its
two package styles. Both 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
OPA830ID
SO-8
DEM
-
OPA68xU
SBOU009
OPA830IDBV
SOT23-5
DEM
-
OPA6xxN
SBOU010
Go to the TI web site (www.ti.com) to request evaluation
boards through the OPA830 product folder.
OPA830
1.5k
1.87k
500
+5V
1.87k
4V
I
V
I
150pF
0.1
μ
F
1MHz, 2ndOrder
Butterworth Filter
100pF
432
137
0.1
μ
F
Figure 8. Single-Supply, High-Frequency Active Filter
相關(guān)PDF資料
PDF描述
OPA2822 Low-Power, Single-Supply, Wideband Operational Amplifier
OPA2830 Low-Power, Single-Supply, Wideband Operational Amplifier
OPA2832 Low-Power, Single-Supply, Wideband Operational Amplifier
OPA4820 Low-Power, Single-Supply, Wideband Operational Amplifier
OPA4830 Low-Power, Single-Supply, Wideband Operational Amplifier
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
OPA3690ID 功能描述:高速運(yùn)算放大器 Triple 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(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
OPA3690IDBQR 功能描述:高速運(yùn)算放大器 Triple 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(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
OPA3690IDBQRG4 功能描述:高速運(yùn)算放大器 Triple 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(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
OPA3690IDBQT 功能描述:高速運(yùn)算放大器 Triple 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(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
OPA3690IDBQTG4 功能描述:高速運(yùn)算放大器 Triple 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(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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