LTC1060_15 Datasheet, PDF (1/20 Pages) Linear Technology – Universal Dual Filter Building Block

LTC1060
Universal Dual Filter
Building Block
FEATURES
■ _{Guaranteed Filter Specification for ±2.37V and}
±5V Supply
■ _{Operates Up to 30kHz}
■ _{Low Power and 88dB Dynamic Range at ±2.5V Supply}
■ _{Center Frequency Q Product Up to 1.6MHz}
■ _{Guaranteed Offset Voltages}
■ _{Guaranteed Clock-to-Center Frequency Accuracy Over}
Temperature:
0.3% for LTC1060A
0.8% for LTC1060
■ _{Guaranteed Q Accuracy Over Temperature}
■ _{Low Temperature Coefficient of Q and Center}
Frequency
■ _{Low Crosstalk, 70dB}
■ _{Clock Inputs TTL and CMOS Compatible}
U
APPLICATIO S
■ _{Single 5V Supply Medium Frequency Filters}
■ _{Very High Q and High Dynamic Range Bandpass,}
Notch Filters
■ _{Tracking Filters}
■ _{Telecom Filters}
DESCRIPTIO
The LTC^®1060 consists of two high performance, switched
capacitor filters. Each filter, together with 2 to 5 resistors,
can produce various 2nd order filter functions such as
lowpass, bandpass, highpass notch and allpass. The
center frequency of these functions can be tuned by an
external clock or by an external clock and resistor ratio. Up
to 4th order full biquadratic functions can be achieved by
cascading the two filter blocks. Any of the classical filter
configurations (like Butterworth, Chebyshev, Bessel, Cauer)
can be formed.
The LTC1060 operates with either a single or dual supply
from ±2.37V to ±8V. When used with low supply
(i.e. single 5V supply), the filter typically consumes 12mW
and can operate with center frequencies up to 10kHz. With
±5V supply, the frequency range extends to 30kHz and
very high Q values can also be obtained.
The LTC1060 is manufactured by using Linear
Technology’s enhanced LTCMOS™ silicon gate process.
Because of this, low offsets, high dynamic range, high
center frequency Q product and excellent temperature
stability are obtained.
The LTC1060 is pinout compatible with MF10.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTCMOS trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
V_IN
1mV(RMS)
Single 5V, Gain of 1000 4th Order Bandpass Filter
3.16k
3.16k
1
100k ₂
2k
3
4
5
6
7
5V
8
9
10
LTC1060
20
19 ^100k
18 2k
17
16
15
14
13
12
11
OUTPUT
5V
1k _0.1µF
1k
CLOCK IN
17.5kHz
LTC1060 • TA01
Amplitude Response
70
60
50
40
30
20
10
0
–10
0
100 125 150 175 200 225 250 275
INPUT FREQUENCY (Hz)
LTC1060 • TA02
1060fb
1