LTC1061 Datasheet, PDF (1/16 Pages) Linear Technology – High Performance Triple Universal Filter Building Block

LTC1061
High Performance Triple
Universal Filter Building Block
FEATURES
s _{Up to 6th Order Filter Functions with a Single 20-Pin}
0.3" Wide Package
s _{Center Frequency Range up to 35kHz}
s _{fO × Q Product up to 1MHz}
s _{Guaranteed Center Frequency and Q Accuracy Over}
Temperature
s _{Guaranteed Low Offset Voltages Over Temperature}
s _{90dB Signal-to-Noise Ratio}
s _{Filter Operates from Single 4.7V Supply and up to}
±8V Supplies
s _{Guaranteed Filter Specifications with ±5V Supply and}
±2.37V Supply
s _{Low Power Consumption with Single 5V Supply}
s _{Clock Inputs T}²_{L and CMOS Compatible}
APPLICATI S
s _{High Order, Wide Frequency Range Bandpass,}
Lowpass, Notch Filters
s _{Low Power Consumption, Single 5V Supply,}
Clock-Tunable Filters
s _{Tracking Filters}
s _{Antialiasing Filters}
LTCMOS^TM is a trademark of Linear Technology Corp.
DESCRIPTIO
The LTC1061 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.
The LTC1061 is manufactured by using Linear Technology’s
enhanced LTCMOS^TM silicon gate process.
TYPICAL APPLICATI
6th Order, Clock-Tunable, 0.5dB Ripple Chebyshev BP Filter
9.31k
165k
V_IN < 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
V_OUT
1061 TA01
Amplitude Response
2kHz
0
f_CLK = 1MHz
–20
–40
–60
–80
–100
0
10
20
30
40
50
INPUT FREQUENCY GAIN (kHz)
LTC1061 • TA02
1