LTC1164
1
1164fa
■
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
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.
Low Power, Low Noise, Quad
Universal Filter Building Block
■
Antialiasing Filters
■
Telecom Filters
■
Spectral Analysis
■
Loop Filters
■
For Fixed Lowpass Filter Requirements use the
LTC1164-XX Series
Dual 5th Order Linear Phase Filter with Stopband Notch
Dual 5th Order Linear Phase Filter with
Stopband Notch, f
CLK
= 500kHz
FREQUENCY (Hz)
1k
GAIN (dB)
10k
100k
LTC1164 • TA02
V
OUT2
V
OUT1
–90.00
–70.00
–40.00
10.00
–10.00
–80.00
–60.00
–50.00
–30.00
0.0
–20.00
SUPPLY TOTAL
VOLTAGE V
IN
HARMONIC DISTORTION SIGNAL/NOISE
±2.5 1V
RMS
0.015% (–76dB) 86dB
±5.0 2V
RMS
0.025% (–72dB) 92dB
±7.5 4V
RMS
0.04% (–68dB) 98dB
LTC1164 • TA01
0.1µF
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
549k
63.4k
49.9k
78.7k
8.66k
C1
C2
36.5k
36.5k
49.9k
63.4k
549k
78.7k
8.66k
133k
102k
V
IN1
V
IN2
V
OUT1
V
OUT2
f
CLK
174k
102k
174k
133k
210k
C1 = 0.0033µF
C2 = 0.0068µF
f
CLK
= 500kHz
WIDEBAND NOISE = 50µV
RMS
TOTAL SUPPLY CURRENT = 3mA
ALL RESISTORS ARE 1% METAL FILM
210k
V
+
V
–
0.1µF
LTC1164
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
LTCMOS trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
U
