LTC1061 Просмотр технического описания (PDF) - Linear Technology
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LTC1061 Datasheet PDF : 16 Pages
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LTC1061
High Performance Triple
Universal Filter Building Block
FEATURES
■ Three Filters in a Single Package
■ Up to 6th Order Filter Functions
■ 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
■ Operation from Single 4.7V Supply, Up to ±8V
■ Guaranteed Filter Specifications with ±5V Supply and
±2.37V Supply
■ Low Power Consumption with Single 5V Supply
■ Clock Inputs T2L and CMOS Compatible
■ Available in 20-Pin DIP and 20-Pin SO Wide Package
U
APPLICATIO S
■ High Order, Wide Frequency Range Bandpass,
Lowpass, Notch Filters
■ Low Power Consumption, Single 5V Supply,
Clock-Tunable Filters
■ Tracking Filters
■ Antialiasing Filters
DESCRIPTIO
The LTC®1061 consists of three high performance, univer-
sal filter building blocks. Each filter building block together
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
clock or an external clock and a resistor ratio. For Q < 5, the
center frequency ranges from 0.1Hz to 35kHz. For Qs of 10
or above, the center frequency ranges from 0.1Hz to
28kHz.
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.
The LTC1061 is compatible with the LTC1059 single
universal filter and the LTC1060 dual. Higher than 6th
order functions can be obtained by cascading the LTC1061
with the LTC1059 or LTC1060. Any classical filter realiza-
tion can be obtained.
, LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOSTM
is a trademark of Linear Technology Corporation. All other trademarks are the property of
their respective owners.
TYPICAL APPLICATIO
6th Order, Clock-Tunable, 0.5dB Ripple Chebyshev BP Filter
9.31k
165k
VIN < 100kHz
1k
165k
4.99k
7.5V
T2 CLK IN < 1.2MHz
1
20
2
19 78.7k
3
18 4.99k
4
17
23.7k
5
16
LTC1061
6
15
V– = –7.5V
7
14 4.99k
8
13 165k
9
12 5.49k
49.9k
V+ = 7.5V
10
11
VOUT
1061 TA01
Amplitude Response
2kHz
0
fCLK = 1MHz
–20
–40
–60
–80
–100
0
10
20
30
40
INPUT FREQUENCY GAIN (kHz)
50
1061 TA02
1061fe
1
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