LTC1069-7CS8#TRPBF Linear Technology, LTC1069-7CS8#TRPBF Datasheet

IC FILTR 8TH ORDER LOWPASS 8SOIC

LTC1069-7CS8#TRPBF

Manufacturer Part Number
LTC1069-7CS8#TRPBF
Description
IC FILTR 8TH ORDER LOWPASS 8SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1069-7CS8#TRPBF

Filter Type
Linear Phase, Lowpass Switched Capacitor
Frequency - Cutoff Or Center
200kHz
Number Of Filters
1
Max-order
8th
Voltage - Supply
±5 V, 5 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1069-7CS8#TRPBFLTC1069-7CS8
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC1069-7CS8#TRPBFLTC1069-7CS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC1069-7CS8#TRPBFLTC1069-7CS8#PBF
Manufacturer:
LTC
Quantity:
152
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APPLICATIONS
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DESCRIPTION
The LTC
phase, 8th order lowpass fi lter. The amplitude response
of the fi lter approximates a raised cosine fi lter with an
alpha of one. The gain at the cutoff frequency is – 3dB and
the attenuation at twice the cutoff frequency is 43dB. The
TYPICAL APPLICATION
FEATURES
8th Order, Linear Phase Filter in SO-8 Package
Raised Cosine Amplitude Response
– 43dB Attenuation at 2× f
Wideband Noise: 140μV
Operates from Single 5V Supply to
±5V Power Supplies
Clock-Tunable to 200kHz with ±5V Supplies
Clock-Tunable to 120kHz with Single 5V Supply
Digital Communication Filter
Antialiasing Filter with Linear Phase
Smoothing Filters
Single 5V Supply, Linear Phase 100kHz Lowpass Filter
0.47μF
®
1069-7 is a monolithic, clock-tunable, linear
0.1μF
V
5V
IN
AGND
V
NC
V
IN
+
LTC1069-7
RMS
CUTOFF
V
CLK
OUT
NC
V
V
OUT
f
CLK
= 2.5MHz
1069-7 TA01
cutoff frequency of the LTC1069-7 is set by an external
clock and is equal to the clock frequency divided by 25.
The ratio of the internal sampling frequency to the cutoff
frequency is 50:1 that is, the input signal is sampled
twice per clock cycle to lower the risk of aliasing. The
LTC1069-7 can be operated from a single 5V supply up
to dual ±5V supplies.
The gain and phase response of the LTC1069-7 can be
used in digital communication systems where pulse
shaping and channel bandwidth limiting must be carried
out. Any system that requires an analog fi lter with linear
phase and sharper roll off than conventional Bessel fi lters
can use the LTC1069-7.
The LTC1069-7 has a wide dynamic range. With ±5V
supplies and an input range of 0.1V
signal-to-(noise + THD) ratio is ≥ 60dB. The wideband noise
of the LTC1069-7 is 140μV
the typical passband gain of the LTC1069-7 is equal to –1V/V.
The LTC1069-7 is available in an SO-8 package.
Other fi lter responses with lower power/speed specifi cations
can be obtained. Please contact LTC Marketing.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
8th Order Lowpass Filter
–30
–40
–60
–70
–10
–20
–50
10
0
10
Frequency Response
FREQUENCY (kHz)
RMS
100
. Unlike other LTC1069-X fi lters,
Linear Phase
LTC1069-7
RMS
1069-7 TA02
to 2V
1000
RMS
10697fa
, the
1

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LTC1069-7CS8#TRPBF Summary of contents

Page 1

... THD) ratio is ≥ 60dB. The wideband noise of the LTC1069-7 is 140μV the typical passband gain of the LTC1069-7 is equal to –1V/V. The LTC1069-7 is available in an SO-8 package. Other fi lter responses with lower power/speed specifi cations can be obtained ...

Page 2

... Lead Temperature (Soldering, 10 sec) .................. 300°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC1069-7CS8#PBF LTC1069-7CS8#TRPBF LTC1069-7IS8#PBF LTC1069-7IS8#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. ...

Page 3

... S CLK V = 4.75V 400kHz S CLK Example: An LTC1069-7 has Phase at 0. –235°. CUTOFF Passband Phase Deviation from Linear Phase = 1/2[180° – (–235°)] – [(180° – (–30.5°)] = –3° ) – (Phase CUTOFF LTC1069-7 signal level is TTL or CMOS (max clock rise ...

Page 4

... LTC1069-7 TYPICAL PERFORMANCE CHARACTERISTICS Passband Gain vs Frequency 1 ± 500kHz CLK f = 20kHz RMS –0.5 –1.0 –1.5 –2.0 –2.5 –3.0 –3.5 –4 FREQUENCY (kHz) 1069-7 G01 Gain vs Frequency ± 250kHz CLK 10kHz RMS –10 –20 –30 –40 –50 – FREQUENCY (kHz) 1069-7 G04 ...

Page 5

... INPUT (V ) P-P Output Offset vs Clock Frequency –10 –15 – –25 –30 – ±5V S –40 –45 –50 0.25 1.25 2.25 3.25 4.25 CLOCK FREQUENCY (MHz) LTC1069-7 Passband Gain and Delay vs Frequency 13 ± 2.5MHz CLK f = 100kHz C 13.0 GAIN 12.5 12.0 DELAY 11.5 11 ...

Page 6

... Figure 1. Connections for Single Supply Operation Supply Current vs Clock Frequency ± 0.25 1.25 2.25 3.25 CLOCK FREQUENCY (MHz) 1069-7 G19 1 8 AGND V V OUT OUT + – LTC1069-7 0.1μ CLK DIGITAL STAR GROUND 1k SYSTEM PLANE GROUND CLOCK SOURCE 1069-7 F01 4.25 5.25 1069-7 G20 10697fa ...

Page 7

... APPLICATIONS INFORMATION Temperature Behavior The power supply current of the LTC1069-7 has a positive temperature coeffi cient. The GBW product of its internal op amps is nearly constant and the speed of the device does not degrade at high temperatures. ...

Page 8

... The internal sampling frequency of the LTC1069 times its f instance if a 48kHz, 100mV signal is applied at the RMS 8 input of an LTC1069-7 operating with a 50% duty cycle 25kHz clock, a 2kHz, 741μV at the fi lter output. Table 4 shows details. Table 4. Aliasing INPUT FREQUENCY V ...

Page 9

... TYP .016 – .050 .014 – .019 (0.355 – 0.483) TYP INCHES LTC1069-7 .189 – .197 (4.801 – 5.004) NOTE .150 – .157 (3.810 – 3.988) NOTE 3 2 ...

Page 10

... Linear Phase 8th Order Lowpass Filter Linear Technology Corporation 10 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● 1μF 10k – AGND V OUT – – 0.1μF LTC1069 CLK f ≤ 5MHz IN CLK COMMENTS 75/1 or 150/1, Very Low Noise CLK 50/1 or 100/ 100kHz CLK C ...

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