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LTC1069-1IS8#PBF

P1-P3P4-P6P7-P9P10-P10
LTC1069-1
1
10691fa
Frequency Response
Single 3.3V Supply 3kHz Elliptic Lowpass Filter
TYPICAL APPLICATION
DESCRIPTION
Low Power, 8th Order
Progressive Elliptic,
Lowpass Filter
The LTC
®
1069-1 is a monolithic 8th order lowpass fi lter
featuring clock-tunable cutoff frequency and 2.5mA power
supply current with a single 5V supply. An additional feature
of the LTC1069-1 is operation with a single 3.3V supply.
The cutoff frequency (f
CUTOFF
) of the LTC1069-1 is equal
to the clock frequency divided by 100. The gain at f
CUTOFF
is –0.7dB and the typical passband ripple is ±0.15dB up
to 0.9f
CUTOFF
. The stopband attenuation of the LTC1069-1
features a progressive elliptic response reaching 20dB
attenuation at 1.2f
CUTOFF
, 52dB attenuation at 1.4f
CUTOFF
and 70dB attenuation at 2f
CUTOFF
.
With ±5V supplies, the LTC1069-1 cutoff frequency can
be clock-tuned up to 12kHz; with a single 5V supply, the
maximum cutoff frequency is 8kHz.
The low power feature of the LTC1069-1 does not penal-
ize the device’s dynamic range. With ±5V supplies and an
input range of 0.3V
RMS
to 2.5V
RMS
, the signal-to-(noise +
THD) ratio is ≥70dB. The wideband noise of the LTC1069-1
is 110μV
RMS
. Other fi lter responses with lower power or
higher speed can be obtained. Please contact LTC market-
ing for details.
The LTC1069-1 is available in 8-pin PDIP and 8-pin SO
packages.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
FEATURES
APPLICATIONS
n
8th Order Elliptic Filter in SO-8 Package
n
Operates from Single 3.3V to ±5V Power Supplies
n
–20dB at 1.2f
CUTOFF
n
–52dB at 1.4f
CUTOFF
n
–70dB at 2f
CUTOFF
n
Wide Dynamic Range
n
110μV
RMS
Wideband Noise
n
3.8mA Supply Current with ±5V Supplies
n
2.5mA Supply Current with Single 5V Supply
n
2mA Supply Current with Single 3.3V Supply
n
Telecommunication Filters
n
Antialiasing Filters
V
OUT
V
–
NC
CLK
AGND
V
+
NC
V
IN
0.1μF
0.47μF
3.3V
V
IN
1069-1 TA01
V
OUT
LTC1069-1
f
CLK
300kHz
+
FREQUENCY (kHz)
1.5
–80
GAIN (dB)
–70
–50
–40
–30
4.5
10
10691 TA02
–60
3 7.56
–20
–10
0
LTC1069-1
2
10691fa
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V
+
to V
–
) .................................12V
Maximum Voltage at
Any Pin .............................(V
–
– 0.3V) ≤ V ≤ (V+ + 0.3V)
(Note 1)
ORDER INFORMATION
PIN CONFIGURATION
1
2
3
4
8
7
6
5
TOP VIEW
AGND
V
+
NC
V
IN
V
OUT
V
–
NC
CLK
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 110°C, θ
JA
= 100°C/W
1
2
3
4
8
7
6
5
TOP VIEW
V
OUT
V
–
NC
CLK
AGND
V
+
NC
V
IN
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125°C, θ
JA
= 130°C/W
Operating Temperature Range
LTC1069C-1 ............................................. 0°C to 70°C
LTC1069I-1 ..........................................–40°C to 85°C
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. f
CUTOFF
is the fi lter’s cutoff frequency and is equal to f
CLK
/100. The
f
CLK
signal level is TTL or CMOS (clock rise or fall time ≤ 1μs), V
S
= 3.3V to ±5V, R
L
= 10k, unless otherwise noted. All AC gains are
measured relative to the passband gain.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Passband Gain (f
IN
≤ 0.25f
CUTOFF
)V
S
= ±5V, f
CLK
= 500kHz
f
TEST
= 1.25kHz, V
IN
= 1V
RMS
l
–0.30
–0.35
0.2 0.70
0.75
dB
dB
V
S
= 3.3V, f
CLK
= 200kHz
f
TEST
= 0.5kHz, V
IN
= 0.5V
RMS
l
–0.30
–0.35
0.2 0.70
0.75
dB
dB
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC1069-1CN8#PBF LTC1069-1 8-Lead Plastic DIP 0°C to 70°C
LTC1069-1IN8#PBF LTC1069-1 8-Lead Plastic DIP –40°C to 85°C
LTC1069-1CS8#PBF LTC1069-1CS8#TRPBF 10691 8-Lead Plastic SO 0°C to 70°C
LTC1069-1IS8#PBF LTC1069-1IS8#TRPBF 10691I 8-Lead Plastic SO –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
LTC1069-1
3
10691fa
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. f
CUTOFF
is the fi lter’s cutoff frequency and is equal to f
CLK
/100. The
f
CLK
signal level is TTL or CMOS (clock rise or fall time ≤ 1μs), V
S
= 3.3V to ±5V, R
L
= 10k, unless otherwise noted. All AC gains are
measured relative to the passband gain.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Gain at 0.50f
CUTOFF
V
S
= ±5V, f
CLK
= 500kHz
f
TEST
= 2.5kHz, V
IN
= 1V
RMS
l
–0.10
–0.11
–0.03 0.10
0.11
dB
dB
V
S
= 3.3V, f
CLK
= 200kHz
f
TEST
= 1kHz, V
IN
= 0.5V
RMS
l
–0.10
–0.11
–0.03 0.10
0.11
dB
dB
Gain at 0.75f
CUTOFF
V
S
= ±5V, f
CLK
= 500kHz
f
TEST
= 3.75kHz, V
IN
= 1V
RMS
l
–0.20
–0.25
0.04 0.20
0.25
dB
dB
V
S
= 3.3V, f
CLK
= 200kHz
f
TEST
= 1.5kHz, V
IN
= 0.5V
RMS
l
–0.20
–0.25
0.04 0.20
0.25
dB
dB
Gain at 0.90f
CUTOFF
V
S
= ±5V, f
CLK
= 500kHz
f
TEST
= 4.5kHz, V
IN
= 1V
RMS
l
–0.20
–0.25
–0.01 0.20
0.25
dB
dB
V
S
= 3.3V, f
CLK
= 200kHz
f
TEST
= 1.8kHz, V
IN
= 0.5V
RMS
l
–0.20
–0.25
–0.01 0.20
0.25
dB
dB
Gain at 0.95f
CUTOFF
V
S
= ±5V, f
CLK
= 500kHz
f
TEST
= 4.75kHz, V
IN
= 1V
RMS
l
–0.30
–0.35
–0.05 0.30
0.35
dB
dB
V
S
= 3.3V, f
CLK
= 200kHz
f
TEST
= 1.9kHz, V
IN
= 0.5V
RMS
l
–0.30
–0.35
–0.04 0.30
0.35
dB
dB
Gain at f
CUTOFF
V
S
= ±5V, f
CLK
= 500kHz
f
TEST
= 5.0kHz, V
IN
= 1V
RMS
l
–1.25
–1.35
–0.70 –0.25
–0.15
dB
dB
V
S
= 3.3V, f
CLK
= 200kHz
f
TEST
= 2.0kHz, V
IN
= 0.5V
RMS
l
–1.25
–1.35
–0.61 –0.25
–0.15
dB
dB
Gain at 1.25f
CUTOFF
V
S
= ±5V, f
CLK
= 500kHz
f
TEST
= 6.25kHz, V
IN
= 1V
RMS
l
–30
–31
–27 –25
–24
dB
dB
V
S
= 3.3V, f
CLK
= 200kHz
f
TEST
= 2.5kHz, V
IN
= 0.5V
RMS
l
–30
–31
–27 –25
–24
dB
dB
Gain at 1.50f
CUTOFF
V
S
= ±5V, f
CLK
= 500kHz
f
TEST
= 7.5kHz, V
IN
= 1V
RMS
l
–58
–59
–53 –50
–49
dB
dB
V
S
= 3.3V, f
CLK
= 200kHz
f
TEST
= 3kHz, V
IN
= 0.5V
RMS
l
–58
–59
–53 –50
–49
dB
dB
Output DC Offset (Input at AGND) V
S
= ±5V, f
CLK
= 500kHz
V
S
= 4.75V, f
CLK
= 400kHz
V
S
= 3.3V, f
CLK
= 200kHz
30
20
15
150
100
mV
mV
mV
Output Voltage Swing V
S
= ±5V
V
S
= 4.75V
V
S
= 3.3V
l
l
l
–3.25
–1.50
–0.70
±4.0
±1.7
±0.9
3.25
1.25
0.60
V
V
V
Power Supply Current V
S
= ±5V, f
CLK
= 500kHz
V
S
= 4.75V, f
CLK
= 400kHz
V
S
= 3.3V, f
CLK
= 200kHz
l
l
l
3.8
2.5
2.0
5.5
4.5
3.5
mA
mA
mA
Maximum Clock Frequency V
S
= ±5V
V
S
= 4.75V
V
S
= 3.3V
1.2
0.8
0.5
MHz
MHz
MHz
Input Frequency Range 0f
CLK
/2 MHz
Input Resistance 30 43 70 kΩ
Operating Power Supply Voltage ±1.57 ±5.5 V
P1-P3P4-P6P7-P9P10-P10

LTC1069-1IS8#PBF

Mfr. #:
Buy LTC1069-1IS8#PBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter L/P 8th Order Progress Elliptic LPF
Lifecycle:
New from this manufacturer.
Delivery:
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