1

LTC1061

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

High Performance Triple

Universal Filter Building Block

DESCRIPTIO

S

FEATURE

s

Up to 6th Order Filter Functions with a Single 20-Pin

0.3" Wide Package

s

Center Frequency Range up to 35kHz

s

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

INPUT FREQUENCY GAIN (kHz)

–100

–80

–60

–40

–20

0

10

20

30

40

LTC1061 • TA02

50

2kHz

0

Amplitude Response

S

APPLICATI

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

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

78.7k

4.99k

23.7k

4.99k

165k

5.49k

49.9k

165k

4.99k

1k

9.31k

165k

7.5V

1061 TA01

LTC1061

6th Order, Clock-Tunable, 0.5dB Ripple Chebyshev BP Filter

APPLICATI

TYPICAL