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參數(shù)資料
| 型號： | LTC1066-1 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter(14位直流精度，時(shí)鐘可調(diào)，８階橢圓形或線性相位低通濾波器) |
| 中文描述： | 14位直流精確時(shí)鐘可調(diào)，8階橢圓型或線性相位低通濾波器（14位直流精度，時(shí)鐘可調(diào)，8階橢圓形或線性相位低通濾波器） |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 302K |
| 代理商： | LTC1066-1 |
12
LTC1066-1
APPLICATIO
S I
FOR
ATIO
U
Aliasing
In a sampled-data system the sampling theorem says that
if an input signal has any frequency components greater
than one half the sampling frequency, aliasing errors will
appear at the output. In practice, aliasing is not always a
serious problem. High order switched-capacitor lowpass
filters are inherently band limited and significant aliasing
occurs only for input signals centered around the clock
frequency and its multiples.
Figure 6 shows the LTC1066-1 aliasing response when
operated with a clock-to-cutoff frequency ratio of 50:1.
With a 50:1 ratio LTC1066-1 samples its input twice
during one clock period and the sampling frequency is
equal to two times the clock frequency.
The figure also shows the maximum aliased output gener-
ated for inputs in the range of 2f
CLK
±
f
C
. For instance, if the
LTC1066-1 is programmed to produce a cutoff frequency
of 20kHz with 1MHz clock, a 10mV, 1.02MHz input signal
will cause a 10
μ
V aliased signal at 20kHz. This signal will
be buried in the noise. Maximum aliasing will occur only
for input signals in the narrow range of 2MHz
±
20kHz or
multiples of 2MHz.
Figure 7 shows the LTC1066-1 aliased response when
operated with a clock-to-cutoff frequency ratio of 100:1
(linear phase response with pin 8 to ground).
W
U
U
Figure 6. Aliasing vs Frequency
f
CLK
/f
C
= 50:1 (Pin 8 to V
+
)
Clock is a 50% Duty Cycle Square Wave
A
0
–60
–80
INPUT FREQUENCY
1066-1 F06
f
CLK
– f
C
2f
CLK
– f
C
2f
CLK
– 2.3f
C
2f
CLK
+ 2.3f
C
2f
CLK
+ f
C
f
CLK
+ f
C
f
CLK
2f
CLK
A
0
–26
–85
INPUT FREQUENCY
1066-1 F07
f
CLK
– f
C
2f
CLK
– f
C
2f
CLK
– 4f
C
f
CLK
– 4f
C
f
CLK
+ 4f
C
2f
CLK
+ 4f
C
f
CLK
+ f
C
2f
CLK
+ f
C
f
CLK
2f
CLK
Figure 7. Aliasing vs Frequency
f
CLK
/f
C
= 100:1 (Pin 8 to Ground)
Clock is a 50% Duty Cycle Square Wave
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1066-1_09 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter |
| LTC1066-1CS | 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter |
| LTC1066-1CSW | 功能描述:IC FILTR 8TH ORDR LOWPASS 18SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時(shí)間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1066-1CSW#PBF | 功能描述:IC FILTR 8TH ORDR LOWPASS 18SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時(shí)間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1066-1CSW#TR | 功能描述:IC FILTER LP 8TH ORDER 18SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時(shí)間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
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