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參數(shù)資料
| 型號： | LTC1065CN8 |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 2/16頁 |
| 文件大小： | 0K |
| 描述： | IC FILTR 5TH ORDR LOWPASS 8-DIP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 濾波器類型： | 貝塞爾，低通開關(guān)電容器 |
| 頻率 - 截止或中心： | 50kHz |
| 濾波器數(shù)： | 1 |
| 濾波器階數(shù)： | 5th |
| 電源電壓： | ±2.37 V ~ 8 V |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 8-PDIP |
| 包裝： | 管件 |
10
LTC1065
1065fb
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
Table 3. CMR Data, fCLK = 100kHz
25
°C
POWER SUPPLY
VIN
–40
°C25°C85°C(VOS Nulled)
±2.5V
±1.8V
84dB
83dB
80dB
83dB
±5V
±4V
82dB
78dB
77dB
78dB
±7.5V
±6V
80dB
77dB
76dB
80dB
5mV/DIV
2
s/DIV
1065F08
fCLK = 100kHz, fC = 1kHz, VS = ±5V, 1MHz SCOPE BW
Figure 8. LTC1065 Output Clock Feedthrough + Noise
0.5mV/DIV
2
s/DIV
1063 F09
fCLK = 100kHz, fC = 1kHz, VS = ±5V, 1MHz SCOPE BW
Figure 9. LTC1065 Output Clock Feedthrough + Noise
The above data is valid for clock frequencies up to 800kHz, 900kHz, 1MHz, for
VS = ±2.5V, ±5V, ±7.5V respectively.
Clock Feedthrough
Clock feedthrough is defined as the RMS value of the clock
frequency and its harmonics which are present at the
filter’s output pin. The clock feedthrough is tested with the
filter input grounded and it depends on the quality of the
PC board layout and power supply decoupling. Any para-
sitic switching transients during the rise and fall of the
incoming clock, are not part of the clock feedthrough
specifications; their amplitude strongly depends on scope
probing techniques as well as ground quality and power
supply bypassing. For a power supply VS = ±5V, the clock
feedthrough of the LTC1065 is 50
VRMS; for VS = ±7.5V,
the clock feedthrough approaches 75
VRMS. Figures 8
and 9 show a typical scope photo of the LTC1065 output
pin when the input pin is grounded. The filter cutoff
frequency was 1kHz, while scope bandwidth was chosen
to be 1MHz so that switching transients above the 100kHz
clock frequency would show.
Wideband Noise
The wideband noise data is used to determine the operat-
ing signal-to-noise ratio at a given distortion level. The
wideband noise (
VRMS)isnearlyindependentofthevalue
of the clock frequency and excludes the clock feedthrough.
The LTC1065’s typical wideband noise is 80
VRMS. Figure
9 shows the same scope photo as Figure 8 but with a more
sensitive vertical scale. The clock feedthrough is imbed-
ded in the filter’s wideband noise. The peak-to-peak wide-
band noise of the filter can be clearly seen; it is approxi-
mately 420
VP-P. Note that 420VP-P equals the 80VRMS
wideband noise of the part multiplied by a crest factor
of 5.25.
Aliasing
Aliasing is an inherent phenomenon of sampled data
filters. It primarily occurs when the frequency of an input
signal approaches the sampling frequency. For the
LTC1065, an input signal whose frequency is in the range
of fCLK ±6% will generate an alias signal into the filter’s
passband and stopband. Table 4 shows details.
Example:
LTC1065, fCLK = 20kHz, fC = 200kHz,
fIN = (19.6kHz, 100mVRMS)
fALIAS = (400Hz, 3.16mVRMS)
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| LTC1065CN8PBF | 制造商:Linear Technology 功能描述:LTC1065CN8PBF |
| LTC1065CS | 制造商:LINER 制造商全稱:Linear Technology 功能描述:DC Accurate, Clock-Tunable Linear Phase 5th Order Bessel Lowpass Filter |
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| LTC1065CSW#PBF | 功能描述:IC FILTR 5TH ORDR LOWPASS 16SOIC 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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