center frequency range is from 0.1Hz to 100kHz. For Q
鈮?/div>
3, the center frequency range can be extended to 140kHz.
Up to 8th order filters can be realized by cascading all four
2nd order sections. Any classical filter realization (such as
Butterworth, Cauer, Bessel and Chebyshev) can be formed.
A customized monolithic version of the LTC1064 includ-
ing internal thin film resistors can be obtained for high
volume applications. Consult LTC Marketing for details.
The LTC1064 is manufactured using Linear Technology鈥檚
enhanced LTCMOS
TM
silicon gate process.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTCMOS is a trademark of Linear Technology Corporation.
s
s
s
s
s
s
s
Four Filters in a 0.3-Inch Wide Package
One Half the Noise of the LTC1059/LTC1060/
LTC1061 Devices
Maximum Center Frequency: 140kHz
Maximum Clock Frequency: 7MHz
Clock-to-Center Frequency Ratio of 50:1 and 100:1
Simultaneously Available
Power Supplies:
鹵2.375V
to
鹵8V
Low Offsets
Low Harmonic Distortion
Customized Version with Internal Resistors
Available
APPLICATIONS
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Anti-Aliasing Filters
Wide Frequency Range Tracking Filters
Spectral Analysis
Loop Filters
TYPICAL APPLICATION
Clock-Tunable 8th Order Cauer Lowpass Filter with f
CUTOFF
up to 100kHz
13k
66.5k
22.1k
V
IN
10k
18.25k
10.7k
1
2
3
4
5
6
8V
0.1碌F
10k
49.9K
11.5K
(FROM
R
H2
, R
L2
)
7
8
9
10
11
12
24
23
22
21
20
10k
12.1k
17.4k
R
L2
26.7k
R
H2
102k
PIN 12
INV B
HPB/NB
BPB
LPB
SB
AGND
V
+
SA
LPA
BPA
HPA/NA
INV A
LTC1064
INV C
HPC/NC
BPC
LPC
SC
V
0
鈥?5
鈥?0
GAIN (dB)
鈥?5
鈥?0
鈥?5
鈥?0
鈥?05
鈥?20
鈥?35
1k
鈥?/div>
19
鈥?V
0.1碌F
5MHz
8V
41.2k
12.7k
14k
121k
10k
V
OUT
CLK
18
17
16
15
14
13
50/100
LPD
BPD
HPD
INV D
FOR f
CLK
= 5MHz, ADD C1 = 10pF BETWEEN PINS 4, 1
C2 = 10pF BETWEEN PINS 21, 24
C3 = 27pF BETWEEN PINS 9, 12
WIDEBAND NOISE
鈮?/div>
140碌V
RMS
1064 TA01
U
U
U
Gain vs Frequency
f
CLK
= 5MHz
RIPPLE =
鹵0.1dB
f
CLK
= 1MHz
RIPPLE =
鹵0.05dB
10k
100k
INPUT FREQUENCY (Hz)
1M
1064 TA02
1
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