LTC1061
High Performance Triple
Universal Filter Building Block
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DESCRIPTIO
EATURE
S
F
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The LTC1061 consists of three high performance, univer-
salfilterbuildingblocks.Eachfilterbuildingblocktogether
with an external clock and 2 to 5 resistors can produce
various second order functions which are available at its
three output pins. Two out of three always provide low-
pass and bandpass functions while the third output pin
can produce highpass or notch or allpass. The center
frequency of these functions can be tuned with an external
clockoranexternalclockandaresistorratio. ForQ<5, the
centerfrequencyrangesfrom0.1Hzto35kHz.ForQsof 10
or above, the center frequency ranges from 0.1Hz to
28kHz.
Up to 6th Order Filter Functions with a Single 20-Pin
0.3" Wide Package
Center Frequency Range up to 35kHz
fO × Q Product up to 1MHz
Guaranteed Center Frequency and Q Accuracy Over
Temperature
Guaranteed Low Offset Voltages Over Temperature
90dB Signal-to-Noise Ratio
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Filter Operates from Single 4.7V Supply and up to
±8V Supplies
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Guaranteed Filter Specifications with ±5V Supply and
±2.37V Supply
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Low Power Consumption with Single 5V Supply
The LTC1061 can be used with single or dual supplies
ranging from ±2.37V to ±8V (or 4.74V to 16V). When the
filter operates with supplies of ±5V and above, it can
handle input frequencies up to 100kHz.
Clock Inputs T2L and CMOS Compatible
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PPLICATI
S
A
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High Order, Wide Frequency Range Bandpass,
The LTC1061 is compatible with the LTC1059 single
universal filter and the LTC1060 dual. Higher than 6th
orderfunctionscanbeobtainedbycascadingtheLTC1061
with the LTC1059 or LTC1060. Any classical filter realiza-
tion can be obtained.
Lowpass, Notch Filters
Low Power Consumption, Single 5V Supply,
Clock-Tunable Filters
Tracking Filters
Antialiasing Filters
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TheLTC1061ismanufacturedbyusingLinearTechnology’s
enhanced LTCMOSTM silicon gate process.
LTCMOSTM is a trademark of Linear Technology Corp.
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O
TYPICAL APPLICATI
Amplitude Response
6th Order, Clock-Tunable, 0.5dB Ripple Chebyshev BP Filter
f
= 1MHz
CLK
2kHz
0
9.31k
1k
1
2
20
19
18
17
16
15
14
13
12
11
165k
4.99k
78.7k
4.99k
–20
–40
3
23.7k
165k
4
V
< 100kHz
IN
5
LTC1061
49.9k
6
–
–60
V
= –7.5V
4.99k
165k
5.49k
7
7.5V
8
2
–80
T
CLK IN < 1.2MHz
9
–100
10
+
V
= 7.5V
0
10
20
30
40
50
V
OUT
1061 TA01
INPUT FREQUENCY GAIN (kHz)
LTC1061 • TA02
1