Datasheet Linear Technology LTC1068

Manufacturer	Linear Technology
Series	LTC1068

Clock-Tunable, Quad Second Order, Filter Building Blocks

Datasheets

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PDF, 392 Kb, Revision: C, File uploaded: Aug 10, 2017

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Prices

Packaging

	LTC1068CG#PBF	LTC1068CG#TRPBF	LTC1068CN#PBF	LTC1068IG#PBF	LTC1068IG#TRPBF	LTC1068IN#PBF
N	1	2	3	4	5	6
Package	SSOP-28 Package Outline Drawing	SSOP-28 Package Outline Drawing	N-24 Package Outline Drawing	SSOP-28 Package Outline Drawing	SSOP-28 Package Outline Drawing	N-24 Package Outline Drawing
Package Code	G	G	N	G	G	N
Package Index	05-08-1640 (G28)	05-08-1640 (G28)	05-08-1510 (N24)	05-08-1640 (G28)	05-08-1640 (G28)	05-08-1510 (N24)
Pin Count	28	28	24	28	28	24

Parametrics

Parameters / Models	LTC1068CG#PBF	LTC1068CG#TRPBF	LTC1068CN#PBF	LTC1068IG#PBF	LTC1068IG#TRPBF	LTC1068IN#PBF
Clock Tunable	yes	yes	yes	yes	yes	yes
Demo Boards	DC104B-A,DC104B-B,DC104B-C,DC104B-D	DC104B-A,DC104B-B,DC104B-C,DC104B-D	DC104B-A,DC104B-B,DC104B-C,DC104B-D	DC104B-A,DC104B-B,DC104B-C,DC104B-D	DC104B-A,DC104B-B,DC104B-C,DC104B-D	DC104B-A,DC104B-B,DC104B-C,DC104B-D
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no	no	no
Filter Order, order	8	8	8	8	8	8
Filters Per Package	4	4	4	4	4	4
Fo Max, kHz	50	50	50	50	50	50
Fo Min, kHz	1	1	1	1	1	1
Fo/Fclk	100:1	100:1	100:1	100:1	100:1	100:1
Isupply, mA	3.5	3.5	3.5	3.5	3.5	3.5
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85
Preconfigured	Universal	Universal	Universal	Universal	Universal	Universal
Vs Max, V	11	11	11	11	11	11
Vs Min, V	3.14	3.14	3.14	3.14	3.14	3.14

Eco Plan

	LTC1068CG#PBF	LTC1068CG#TRPBF	LTC1068CN#PBF	LTC1068IG#PBF	LTC1068IG#TRPBF	LTC1068IN#PBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Other Options

LTC1068-200 LTC1068-25 LTC1068-50

Articles

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Clock-Tunable, High Accuracy, Quad 2nd Order, Analog Filter Building Blocks &mdash LT Journal
PDF, 239 Kb, File published: Aug 1, 1998
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DESIGN FEATURES Clock-Tunable, High Accuracy,
Quad 2nd Order, Analog Filter
Building Blocks
by Philip Karantzalis
LTC1068-200 Ultralow
The LTC1068 product family consists ware for Windows . The internal sam-Frequency Linear-Phase
of four monolithic, clock-tunable filter pling rate of all the LTC1068 devices Lowpass Filter
Introduction В® is twice the clock frequency. This
allows the frequency of input signals
to approach twice the clock frequency
before aliasing occurs. Maximum
clock frequency for LTC1068-200,
LTC1068 and LTC1068-25 is 6MHz
with В±5V supplies; that for the
LTC1068-50 is 2MHz with a single 5V
supply. For low power filter applications, the LTC1068-50 power supply
current is 4.5mA with a single 5V
supply and 2.5mA with a single 3V
supply. The LTC1068 products are
available in a 28-pin SSOP surface
mount package. The LTC1068 (the
100:1 part) is also available in a 24pin DIP package. The following four
circuits are typical examples of …
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High Clock-to-Center Frequency Ratio LTC1068-200 Extends Capabilities of Switched Capacitor Highpass Filter &mdash LT Journal
PDF, 214 Kb, File published: Feb 1, 1998
Extract from the document
DESIGN IDEAS High Clock-to-Center Frequency Ratio
LTC1068-200 Extends Capabilities
of Switched Capacitor Highpass Filter
by Frank Cox continued on page 33 вЂ“10dB 10dB/DIV input signal too much you will also
limit the passband of the filter, and
hence its usefulness.
What makes this filter different is
the 200:1 clock-to-center frequency
ratio (CCFR) and the internal sampling scheme of the LTC1068-200.
Figure 2a shows the amplitude
response of the filter plotted against
frequency from 100Hz to 10kHz. For
comparison, Figure 2b shows the
same filter built with an LTC1068-25.
This is a 25:1 CCFR part. The 200:1
CCFR filter delivers almost 30dB more
ultimate attenuation in the stopband.
A standard amplitude vs frequency
plot of a highpass filter can be misleading because it masks some of the
aforementioned spurious signals
introduced into the passband. Figure
3a is a spectrum plot of the 200:1
filter with a single 10kHz tone on the …

Model Line

Series: LTC1068 (6)

LTC1068CG#PBF LTC1068CG#TRPBF LTC1068CN#PBF LTC1068IG#PBF LTC1068IG#TRPBF LTC1068IN#PBF

Manufacturer's Classification

Signal Conditioning > Filters > Filter Building Blocks