參數(shù)資料
型號： THS6032GQE
廠商： Texas Instruments, Inc.
英文描述： LOW-POWER ADSL CENTRAL-OFFICE LINE DRIVER
中文描述： 低功耗寬帶局端線路驅(qū)動器
文件頁數(shù)： 27/31頁
文件大小： 496K
代理商： THS6032GQE
THS6032
LOW-POWER ADSL CENTRAL-OFFICE LINE DRIVER
SLOS233C – APRIL1999 – REVISED MARCH 2000
27
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
general configurations
A common error for the first-time CFB user is to create a unity gain buffer amplifier by shorting the output directly
to the inverting input. A CFB amplifier in this configuration oscillates and is not recommended. The THS6032,
like all CFB amplifiers, must have a feedback resistor for stable operation. Additionally, placing capacitors
directly from the output to the inverting input is not recommended. This is because, at high frequencies, a
capacitor has a very low impedance. This results in an unstable amplifier and should not be considered when
using a current-feedback amplifier. Because of this, simple low-pass filters, which are easily implemented on
a VFB amplifier, have to be designed slightly differently. If filtering is required, simply place an RC-filter at the
noninverting terminal of the operational-amplifier (see Figure 52).
VI
VO
C1
+
–
RG
RF
R1
f–3dB
1
2 R1C1
VO
VI
1
RF
RG
1
sR1C1
1
Figure 52. Single-Pole Low-Pass Filter
If a multiple pole filter is required, the use of a Sallen-Key filter can work very well with CFB amplifiers. This is
because the filtering elements are not in the negative feedback loop and stability is not compromised. Because
of their high slew-rates and high bandwidths, CFB amplifiers can create very accurate signals and help minimize
distortion. One implementation of the Sallen-Key filter is shown in Figure 53. For more information on Sallen-Key
filters, refer to the Analysis of the Sallen-Key Architecture literature number SLOA024A.
VI
C2
R2
R1
C1
RF
RG
R1 = R2 = R
C1 = C2 = C
Q = Peaking Factor
(Butterworth Q = 0.707)
(
=
1
Q
2 –
)
RG
RF
_
+
f–3dB
1
2 RC
Figure 53. 2-Pole Low-Pass Sallen-Key Filter
Another good use for the THS6032 amplifiers is as video distribution amplifiers. One characteristic of distribution
amplifiers is the fact that the differential phase (DP) and the differential gain (DG) are compromised as the
number of lines increases and the closed-loop gain increases. Be sure to use termination resistors throughout
the distribution system to minimize reflections and capacitive loading.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS6032GQEEVM 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-POWER ADSL CENTRAL-OFFICE LINE DRIVER
THS6032IDWP 功能描述:緩沖器和線路驅(qū)動器 Low-Pwr ADSL Cent-Office Line Drv RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
THS6032IDWPG4 功能描述:緩沖器和線路驅(qū)動器 Low-Pwr ADSL Cent-Office Line Drv RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
THS6032IDWPR 功能描述:緩沖器和線路驅(qū)動器 Low-Pwr ADSL Cent-Office Line Drv RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
THS6032IDWPRG4 功能描述:緩沖器和線路驅(qū)動器 Low-Pwr ADSL Cent-Office Line Drv RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
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