LTC1164_02 Datasheet, PDF (1/16 Pages) Linear Technology – Low Power, Low Noise, Quad Universal Filter Building Block

LTC1164
Low Power , Low Noise, Quad
Universal Filter Building Block
FEATURES
■ _{Low Power}
■ _{4 Filters in a 0.3" Wide Package}
■ _{1/2 the Noise of the LTC1059, 60, 61 Devices}
■ _{Wide Output Swing}
■ _{Clock-to-Center Frequency Ratios of 50:1 and 100:1}
■ _{Operates from ±2.37V to ±8V Power Supplies}
■ _{Customized Version with Internal Resistors Available}
■ _{Ratio of 50:1 and 100:1 Simultaneously Available}
U
APPLICATIO S
■ _{Antialiasing Filters}
■ _{Telecom Filters}
■ _{Spectral Analysis}
■ _{Loop Filters}
■ _{For Fixed Lowpass Filter Requirements use the}
LTC1164-XX Series
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTCMOS trademark of Linear Technology Corporation.
DESCRIPTIO
The LTC^®1164 consists of four low power, low noise
2nd order switched capacitor filter building blocks. Each
building block typically consumes 850µA supply current.
Low power is achieved without sacrificing noise and
distortion. Each building block, together with 3 to 5
resistors, can provide 2nd order functions like lowpass,
highpass, bandpass, and notch. The center frequency of
each 2nd order section can be tuned with an external clock,
or a clock and resistor ratio. For Q < 5, the center frequency
range is from 0.1Hz to 20kHz. Up to 8th order filters can
be realized by cascading all four 2nd order sections. Any
classical filter realization (such as Butterworth, Cauer,
Bessel, and Chebyshev) can be formed.
A customized monolithic version of the LTC1164
including internal thin film resistors can be obtained.
Consult LTC Marketing for details.
The LTC1164 is manufactured using Linear Technology’s
enhanced LTCMOS^™ silicon gate process.
TYPICAL APPLICATIO
Dual 5th Order Linear Phase Filter with Stopband Notch
549k
63.4k
210k
V_IN1
1
102k
2
133k ₃
174k
4
24
23 ^49.9k
22
36.5k
21 ^78.7k
8.66k
5
20
6 ^LTC1164 19
V⁺
0.1µF
7
18
f_CLK
8
17
8.66k
210k
V_IN2
174k
9
133k ₁₀
102k
11
12
C1 = 0.0033µF
C2 = 0.0068µF
f_CLK = 500kHz
WIDEBAND NOISE = 50µV_RMS
TOTAL SUPPLY CURRENT = 3mA
ALL RESISTORS ARE 1% METAL FILM
16 ^78.7k
15
36.5k
14 ^49.9k
13
63.4k
549k
V_OUT1
C1
V^–
0.1µF
V_OUT2
C2
LTC1164 • TA01
Dual 5th Order Linear Phase Filter with
Stopband Notch, f_CLK = 500kHz
10.00
0.0
– 10.00
– 20.00
– 30.00
V_OUT2
V_OUT1
– 40.00
– 50.00
– 60.00
– 70.00
– 80.00
– 90.00
1k
10k
FREQUENCY (Hz)
100k
LTC1164 • TA02
SUPPLY
VOLTAGE
±2.5
±5.0
±7.5
V_IN
1V_RMS
2V_RMS
4V_RMS
TOTAL
HARMONIC DISTORTION
0.015% (–76dB)
0.025% (–72dB)
0.04% (–68dB)
SIGNAL/NOIS E
86dB
92dB
98dB
1164fa
1