LTC1064 Linear Technology, LTC1064 Datasheet - Page 13

• Manufacturer Part Number: LTC1064
• Description: Low Noise/ Fast/ Quad Universal Filter Building Block
• Manufacturer: Linear Technology

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