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LTC1069-6CS8#TRPBF

P1-P3P4-P6P7-P9P10-P10
LTC1069-6
1
10696fa
TYPICAL APPLICATION
DESCRIPTION
Single Supply, Very Low
Power, Elliptic Lowpass Filter
The LTC
®
1069-6 is a monolithic low power, 8th order lowpass
fi lter optimized for single 3V or single 5V supply operation.
The LTC1069-6 typically consumes 1mA under single 3V
supply operation and 1.2mA under 5V operation.
The cutoff frequency of the LTC1069-6 is clock tunable and it is
equal to the clock frequency divided by 50. The input signal is
sampled twice per clock cycle to lower the risk of aliasing.
The typical passband ripple is ±0.1dB up to 0.9f
CUTOFF
.
The gain at f
CUTOFF
is –0.7dB. The transition band of the
LTC1069-6 features progressive attenuation reaching
42dB at 1.3f
CUTOFF
and 70dB at 2.1f
CUTOFF
. The maximum
stopband attenuation is 72dB.
The LTC1069-6 can be clock tuned for cutoff frequencies
up to 20kHz (single 5V supply) and for cutoff frequencies
up to 14kHz (single 3V supply).
The low power feature of the LTC1069-6 does not penalize
the device’s dynamic range. With single 5V supply and
an input range of 0.4V
RMS
to 1.4V
RMS
, the Signal-to-
(Noise + THD) ratio is ≥70dB. The wideband noise of the
LTC1069-6 is 125μV
RMS
.
Other fi lter responses with higher speed can be obtained.
Please contact LTC Marketing for details.
The LTC1069-6 is available in an 8-pin SO package.
Single 3V Supply 10kHz Elliptic Lowpass Filter
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
FEATURES
APPLICATIONS
n
8th Order Elliptic Filter in SO-8 Package
n
Single 3V Operation: Supply Current: 1mA (Typ)
f
CUTOFF
: 14kHz (Max) S/N Ratio: 72dB
n
Single 5V Operation: Supply Current: 1.2mA (Typ)
f
CUTOFF
: 20kHz (Max) S/N Ratio: 79dB
n
±0.1dB Passband Ripple Up to 0.9f
CUTOFF
(Typ)
n
42dB Attenuation at 1.3f
CUTOFF
n
66dB Attenuation at 2.0f
CUTOFF
n
70dB Attenuation at 2.1f
CUTOFF
n
Wide Dynamic Range, 75dB or More (S/N + THD),
Under Single 5V Operation
n
Wideband Noise: 120µV
RMS
n
Clock-to-f
CUTOFF
Ratio: 50:1
n
Internal Sample Rate: 100:1
n
Handheld Instruments
n
Telecommunication Filters
n
Antialiasing Filters
n
Smoothing Filters
n
Audio
n
Multimedia
AGND
V
+
NC
V
IN
V
OUT
V
–
NC
CLK
LTC1069-6
f
CLK
= 500kHz
3V
0.47μF
0.1μF
1069-6 TA01
FREQUENCY (kHz)
5
–80
GAIN (dB)
–70
–50
–40
–30
15
10
1069-6 TA02
–60
10 20 25
–20
–10
0
V
IN
= 500mV
RMS
Frequency Response
LTC1069-6
2
10696fa
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V
+
to V
–
) ................................12V
Operating Temperature Range
LTC1069-6C ............................................. 0°C to 70°C
LTC1069-6I ..........................................–40°C to 85°C
Storage Temperature ..............................– 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
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
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1069-6CS8#PBF LTC1069-6CS8#TRPBF 10696 8-Lead Plastic SO 0°C to 70°C
LTC1069-6IS8#PBF LTC1069-6IS8#TRPBF 10696I 8-Lead Plastic SO –40°C to 85°C
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.
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/
ELECTRICAL CHARACTERISTICS
SYMBOL CONDITIONS MIN TYP MAX UNITS
Passband Gain (f
IN
≤ 0.2f
CUTOFF
)V
S
= 5V, f
CLK
= 200kHz
f
TEST
= 0.25kHz, V
IN
= 1V
RMS
l
–0.25
–0.30
0.1
0.1
0.45
0.50
db
db
V
S
= 3V, f
CLK
= 200kHz
f
TEST
= 0.25kHz, V
IN
= 0.5V
RMS
l
–0.25
–0.30
0.1
0.1
0.45
0.50
db
db
Gain at 0.50f
CUTOFF
V
S
= 5V, f
CLK
= 200kHz
f
TEST
= 2.0kHz, V
IN
= 1V
RMS
l
–0.10
–0.15
0.07
0.07
0.25
0.30
db
db
V
S
= 3V, f
CLK
= 200kHz
f
TEST
= 2.0kHz, V
IN
= 0.5V
RMS
l
–0.15
–0.20
0.07
0.07
0.25
0.30
db
db
Gain at 0.75f
CUTOFF
V
S
= 5V, f
CLK
= 200kHz
f
TEST
= 3.0kHz, V
IN
= 1V
RMS
l
–0.25
–0.30
0
0
0.25
0.30
db
db
V
S
= 3V, f
CLK
= 200kHz
f
TEST
= 3.0kHz, V
IN
= 0.5V
RMS
l
–0.25
–0.30
0
0
0.25
0.30
db
db
Gain at 0.90f
CUTOFF
V
S
= 5V, f
CLK
= 200kHz
f
TEST
= 3.6kHz, V
IN
= 1V
RMS
l
–0.25
–0.25
0.1
0.1
0.45
0.45
db
db
V
S
= 3V, f
CLK
= 200kHz
f
TEST
= 3.6kHz, V
IN
= 0.5V
RMS
l
–0.25
–0.30
0.1
0.1
0.45
0.50
db
db
Gain at 0.95f
CUTOFF
V
S
= 5V, f
CLK
= 200kHz
f
TEST
= 3.8kHz, V
IN
= 1V
RMS
l
–0.35
–0.45
0.05
0.05
0.25
0.25
db
db
V
S
= 3V, f
CLK
= 200kHz
f
TEST
= 3.8kHz, V
IN
= 0.5V
RMS
l
–0.45
–0.55
0.05
0.05
0.25
0.35
db
db
The l denotes the specifi cations which apply over the full operating
temperature range. f
CUTOFF
is the fi lter’s cutoff frequency and is equal to f
CLK
/50. The f
CLK
signal level is TTL or CMOS (clock rise or
fall time ≤ 1µs) R
L
= 10k, V
S
= 5V, T
A
= 25°C, unless otherwise specifi ed. All AC gains are measured relative to the passband gain.
LTC1069-6
3
10696fa
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.
Note 2: The input offset voltage is measured with respect to AGND (Pin 1).
The input (Pin 4) is also shorted to the AGND pin. The analog ground pin
potential is internally set to (0.437)(V
SUPPLY
).
The l denotes the specifi cations which apply over the full operating
temperature range. f
CUTOFF
is the fi lter’s cutoff frequency and is equal to f
CLK
/50. The f
CLK
signal level is TTL or CMOS (clock rise or
fall time ≤ 1µs) R
L
= 10k, V
S
= 5V, T
A
= 25°C, unless otherwise specifi ed. All AC gains are measured relative to the passband gain.
SYMBOL CONDITIONS MIN TYP MAX UNITS
Gain at f
CUTOFF
V
S
= 5V, f
CLK
= 200kHz
f
TEST
= 4.0kHz, V
IN
= 1V
RMS
l
–1.50
–1.65
–0.07
–0.07
–0.20
–0.25
db
db
V
S
= 3V, f
CLK
= 200kHz
f
TEST
= 4.0kHz, V
IN
= 0.5V
RMS
l
–1.5
–1.7
–0.07
–0.07
0
0
db
db
Gain at 1.30f
CUTOFF
V
S
= 5V, f
CLK
= 200kHz
f
TEST
= 5.2kHz, V
IN
= 1V
RMS
l
–42
–42
–40
–39
db
db
V
S
= 3V, f
CLK
= 200kHz
f
TEST
= 5.2kHz, V
IN
= 0.5V
RMS
l
–41
–41
–38
–37
db
db
Gain at 2.00f
CUTOFF
V
S
= 5V, f
CLK
= 200kHz
f
TEST
= 8.0kHz, V
IN
= 1V
RMS
l
–66
–66
–61
–60
db
db
V
S
= 3V, f
CLK
= 200kHz
f
TEST
= 8.0kHz, V
IN
= 0.5V
RMS
l
–66
–66
–60
–59
db
dB
Gain at 0.95f
CUTOFF
V
S
= 5V, f
CLK
= 400kHz, f
TEST
= 7.6kHz, V
IN
= 1V
RMS
V
S
= 3V, f
CLK
= 400kHz, f
TEST
= 7.6kHz, V
IN
= 0.5V
RMS
–0.5
–0.5
0.15
0
0.5
0.5
db
db
Output DC Offset (Note 1) V
S
= 5V, f
CLK
= 100kHz
V
S
= 3V, f
CLK
= 100kHz
50
30
175
135
mV
mV
Output DC Offset Tempco V
S
= 5V, V
S
= 3V 30 μV/°C
Output Voltage Swing (Note 2) V
S
= 5V, f
CLK
= 100kHz
l
3.4
3.2
4.2
4.2
V
P-P
V
P-P
V
S
= 3V, f
CLK
= 100kHz
l
1.6
1.6
2.0
2.0
V
P-P
V
P-P
Power Supply Current V
S
= 5V, f
CLK
= 100kHz
l
1.2 1.60
1.65
mA
mA
V
S
= 3V, f
CLK
= 100kHz
l
1 1.40
1.55
mA
mA
Maximum Clock Frequency V
S
= 5V
V
S
= 3V
1
0.7
MHz
MHz
Input Frequency Range 0 <(f
CLK
– 2f
C
)
Input Resistance 35 50 80 kΩ
Operating Supply Voltage (Note 3) 310V
Note 3: The input voltage can swing to either rail (V
+
or ground); the
output typically swings 50mV from ground and 0.8V from V
+
.
Note 4: The LTC1069-6 is optimized for 3V and 5V operation. Although
the device can operate with a single 10V supply or ±5V, the total harmonic
distortion will be degraded. For single 10V or ±5V supply operation we
recommend to use the LTC1069-1.
P1-P3P4-P6P7-P9P10-P10

LTC1069-6CS8#TRPBF

Mfr. #:
Buy LTC1069-6CS8#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter Single Supply,Very L/P,Elliptic LPF
Lifecycle:
New from this manufacturer.
Delivery:
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