LT1064 データシートの表示（PDF） - Linear Technology
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LT1064 Datasheet PDF : 16 Pages
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TYPICAL APPLICATIONS
5V TO 8V
VIN
8th Order Chebyshev Lowpass Filter with a Passband
Ripple of 0.1dB and Cutoff Frequency up to 100kHz
R13
R22
R32
R12
R42
1 INV B
INV C 24
2 HPB/NB HPC/NC 23
R23
3 BPB
BPC 22
R33
4 LPB
LPC 21
R43
5 SB
SC 20
R14
6 AGND
V– 19
–5V TO –8V
0.1µF
7 V+
8 SA
LTC1064 CLK 18
50/100 17
fCLK = 5MHz
5V TO 8V
R41
9 LPA
LPD 16
R44
R31
10 BPA
BPD 15
R34
R21
11 HPA/NA
HPD 14
R24
R11
12 INV A
INV D 13
RESISTOR VALUES:
R11 = 100.86k R21 = 16.75k R31 = 23.6k R41 = 99.73k
R12 = 25.72k R22 = 20.93k R32 = 45.2k R42 = 25.52k
R13 = 16.61k R23 = 10.18k R33 = 68.15k R43 = 99.83k
R14 = 13.84k R24 = 11.52k R34 = 17.72k R44 = 25.42k
FOR fCLK > 3MHz, ADD C2 = 10pF ACROSS R42
C3 = 10pF ACROSS R43
C4 = 10pF ACROSS R44
WIDEBAND NOISE = 170µVRMS
0.1µF
VOUT
1064 TA11
8th Order Clock-Sweepable Lowpass Elliptic Antialiasing Filter
RH1
RL1
RH2
RL2
1 INV B
INV C 24
R11
VIN
R22
2 HPB/NB HPC/NC 23
R21
R32
3 BPB
BPC 22
R31
R42
4 LPB
LPC 21
R41
5 SB
SC 20
6 AGND
V– 19
–7.5V
7.5V
7 V+ LTC1064 CLK 18 fCLK ≤ 2MHz
0.1µF
0.1µF
8 SA
50/100 17 –7.5V
R43
9 LPA
LPD 16
R44
R33
10 BPA
BPD 15
R34
R23
11 HPA/NA
HPD 14
R24
12 INV A
INV D 13
RL3
VOUT
RH3
RESISTOR VALUES:
R11 = 19.1k R21 = 10k
R22 = 10k
R23 = 11.3k
R24 = 15.4k
R31 = 13.7k
R32 = 23.7k
R33 = 84.5k
R34 = 15.2k
R41 = 15.4k
R42 = 10.2k
R43 = 10k
R44 = 42.7k
R L1 = 14k R H1 = 30.9k
R L2 = 26.7k R H2 = 76.8k
R L3 = 10k R H3 = 60.2k
NOTE: FOR tCUTOFF >15kHz, ADD A 5pF CAPACITOR ACROSS R41 AND R43
1064 TA13
LTC1064
Amplitude Response
15
0
– 15
–30
–45
–60
–75
VS = ±8V
–90 fCLK = 5MHz
PASSBAND RIPPLE = 0.1dB
–105
10k
100k
INPUT FREQUENCY (Hz)
1M
1064 TA12
Amplitude Response
0
–15
–30
–45
–60
–75
–90
–105
0 10 20 30 40 50 60 70
FREQUENCY (kHz)
8TH ORDER CLOCK-SWEEPABLE LOWPASS
ELLIPTIC ANTIALIASING FILTER MAINTAINS,
FOR 0.1Hz ≤ fCUTOFF ≤ 20kHz, A ±0.1dB MAX
PASSBAND ERROR AND 72dB MIN STOPBAND
ATTENUATION AT 1.5 × fCUTOFF.
TOTAL WIDEBAND NOISE = 150µVRMS,
THD = 70dB (0.03%) FOR VIN = 3VRMS,
fCLK/fCUTOFF = 100:1. THIS FILTER AVAILABLE
AS LTC1064-1 WITH INTERNAL THIN FILM
RESISTORS.
1064 TA14
13
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