Figure 15. fCLK vs Filter Cutoff Frequencies" />
參數(shù)資料
型號(hào)： LTC6602IUF#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 15/28頁(yè)
文件大?。?/td> 0K
描述： IC FILTER BANDPASS/LOWPASS 24QFN
標(biāo)準(zhǔn)包裝： 2,500
濾波器類(lèi)型： 帶通
頻率 - 截止或中心： 300kHz
濾波器數(shù)： 2
濾波器階數(shù)： 5th
電源電壓： 2.7 V ~ 3.6 V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 24-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 24-QFN 裸露焊盤(pán)（4x4）
包裝： 帶卷 (TR)
LTC6602
22
6602fc
APPLICATIONS INFORMATION
Figure 15. fCLK vs Filter Cutoff Frequencies
Figure 16. Supply Current vs Lowpass Cutoff Frequency
Table 5. Total Input Referred Integrated Noise Voltage (Passband Gain = 30dB)
LPF1
LPF0
HPF1
HPF0
Noise Voltage
0
–90dBm
0
1
0
1
–89dBm
1
X
1
0
–82dBm
Power Supply Current
The power supply current depends on the state of the
lowpass cutoff frequency controls (LPF1, LPF0) and the
value of RBIAS. When the LTC6602 is programmed for the
lowest lowpass cutoff frequency (LPF1 = LPF0 = ‘0’), the
supply current is reduced by about 35% relative to the
supply current for the higher bandwidth settings. Power
supply current vs. cutoff frequency for various bandwidth
settings is shown in the Typical Performance Characteris-
ticssection.TheLTC6602canbeprogrammedthroughthe
serial interface to enter into a low power shutdown mode
as described in the Serial Interface section. The power
supply current during shutdown is less than 235A.
Supply Current Versus Noise Tradeoff
The passband of the LTC6602 is determined by the master
clock frequency (which is set by RBIAS when the internal
oscillator is used), HPF1, HPF0, LPF1 and LPF0. The
LTC6602 is optimized for use with RBIAS having a value
between 200k and 54.9k to set the internal oscillation
frequency from 24.705MHz to 90MHz. Both lowpass
and highpass corner frequencies are proportional to the
clock frequency (internal or external). To extend the filter’s
operational frequency range, the master clock is divided
down before reaching the filter. LPF1 and LPF0 set the divi-
sion ratio of the lowpass clock while HPF1 and HPF0 set
the division ratio of the highpass clock. Figure 15 shows
the possible cutoff frequencies versus fCLK, HPF1, HPF0,
LPF1 and LPF0. Overlapping frequency ranges allow more
than one possible choice of bandwidth settings for some
cutoff frequencies. Figure 16 shows supply current as a
function of the lowpass cutoff frequency, LPF1 and LPF0.
Note that the higher bandwidth setting always gives the
minimum supply current for a given cutoff frequency. The
total integrated noise voltage for a passband gain of 30dB
is shown in Table 5. Note that the noise is higher for the
higherbandwidthsettings.Thiscreatesatradeoffbetween
supply current and noise. For a given cutoff frequency,
using the highest possible bandwidth setting gives the
minimum supply current at the expense of higher noise.
FILTER CUTOFF FREQUENCY (Hz)
f CLK
(MHz)
6602 F15
100
10
1k
100k
1M
10k
HPF1 = 0
HPF0 = 0
HPF1 = 0
HPF0 = 1
HPF1 = 1
HPF0 = 0
LPF1 = 0
LPF0 = 0
LPF1 = 0
LPF0 = 1
LPF1 = 1
LOWPASS CUTOFF FREQUENCY (Hz)
SUPPL
YCURRENT
(mA)
6602 F16
120
60
80
100
40
20
0
10k
100k
1M
TA = 25°C
VS = 3V
CLKCNTL PIN FLOATING
HPF1 = 0
HPF0 = 1
GAIN = 0dB
LPF1 = 0
LPF0 = 1
LPF1 = 0
LPF0 = 0
LPF1 = 1
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參數(shù)描述
LTC6603 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Dual Adjustable Lowpass Filter
LTC6603CUF#PBF 功能描述:IC FILTER LOWPASS 24-QFN RoHS:是 類(lèi)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(lèi)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(lèi)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)
LTC6603CUF#TRPBF 功能描述:IC FILTER LOWPASS 24-QFN RoHS:是 類(lèi)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(lèi)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(lèi)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)
LTC6603CUF-PBF 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Dual Adjustable Lowpass Filter
LTC6603CUF-TRPBF 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Dual Adjustable Lowpass Filter
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