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LTC1065CS

Description
DC Accurate, Clock-Tunable Linear Phase 5th Order Bessel Lowpass Filter
CategoryAnalog mixed-signal IC    filter   
File Size251KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1065CS Overview

DC Accurate, Clock-Tunable Linear Phase 5th Order Bessel Lowpass Filter

LTC1065CS Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP, SOP16,.4
Contacts16
Reach Compliance Codecompli
ECCN codeEAR99
Active filter typeSWITCHED CAPACITOR FILTER
Center frequency or cutoff frequency maximum range50 kHz
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length10.3 mm
Maximum negative supply voltage (Vsup)-8 V
Negative supply voltage minimum (Vsup)-2.375 V
Nominal Negative Supply Voltage (Vsup)-5 V
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Order5TH
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP16,.4
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)255
poles and zeros5 AND 0
power supply+-5 V
Certification statusNot Qualified
responseLOWPASS
Maximum seat height2.65 mm
Maximum supply current (Isup)14.5 mA
Maximum supply voltage (Vsup)8 V
Minimum supply voltage (Vsup)2.375 V
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
transfer characteristicsBESSEL
width7.5 mm
LTC1065
DC Accurate, Clock-Tunable
Linear Phase 5th Order Bessel
Lowpass Filter
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Clock-Tunable Cutoff Frequency
1mV DC Offset (Typical)
80dB CMR (Typical)
Internal or External Clock
50µV
RMS
Clock Feedthrough
100:1 Clock-to-Cutoff Frequency Ratio
80µV
RMS
Total Wideband Noise
0.004% Noise + THD at 2V
RMS
Output Level
50kHz Maximum Cutoff Frequency
Cascadable for Faster Roll-Off
Operates from
±2.375
to
±8V
Power Supplies
Self-Clocking with 1 RC
The LTC1065 is the first monolithic filter providing both
clock-tunability with low DC output offset and over 12-bit
DC accuracy. The frequency response of the LTC1065
closely approximates a 5th order Bessel polynomial. With
appropriate PCB layout techniques the output DC offset is
typically 1mV and is constant over a wide range of clock
frequencies. With
±5V
supplies and
±4V
input voltage
range, the CMR of the device is typically 80dB.
The filter cutoff frequency is controlled either by an inter-
nal or external clock. The clock-to-cutoff frequency ratio is
100 : 1. The on-board clock is nearly power supply inde-
pendent and it is programmed via an external RC. The
50µV
RMS
clock feedthrough of the device is considerably
lower than other existing monolithic filters.
The LTC1065 wideband noise is 80µV
RMS
and it can
process large AC input signals with low distortion. With
±
7.5V supplies, for instance, the filter handles up to
4V
RMS
(94dB S/N ratio) while the standard 1kHz THD is
below 0.005%; 87dB dynamic range (S/N + THD) is ob-
tained with input levels between 2V
RMS
and 2.5V
RMS
.
The LTC1065 is available in 8-pin miniDIP and 16-pin SOL.
For a Butterworth response, see LTC1063 data sheet. The
LTC1065 is pin compatible with the LTC1063.
APPLICATI
s
s
s
s
s
s
s
S
Audio
Strain Gauge Amplifiers
Anti-Aliasing Filters
Low Level Filtering
Digital Voltmeters
Smoothing Filters
Reconstruction Filters
TYPICAL APPLICATI
5V
4.99k
V
IN
1
2
3.4kHz Single 5V Supply Bessel Lowpass Filter
10
0
8
7
LTC1065
6
5
V
OUT
5V
0.1µF
–10
–20
GAIN (dB)
+
1µF
TANT
4.53k
0.1µF 3
4
–30
–40
–50
–60
13k*
*
SELF-CLOCKING SCHEME
200pF*
1065 TA01
–70
–80
–90
1
10
FREQUENCY (kHz)
100
1065 TA02
U
Frequency Response
UO
UO
1

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