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LTC1565-31IS8#PBF

P1-P3P4-P6P7-P9P10-P12
LTC1565-31
1
156531fa
TYPICAL APPLICATION
FEATURES DESCRIPTION
APPLICATIONS
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
The LTC
®
1565-31 is a 7th order, continuous time, linear
phase lowpass fi lter. The selectivity of the LTC1565-31,
combined with its linear phase and dynamic range, make
it suitable for fi ltering in data communications or data
acquisition systems. The fi lter attenuation is 36dB at
2× f
CUTOFF
and at least 72dB for frequencies above 3×
f
CUTOFF
. Unlike comparable LC fi lters, the LTC1565-31
achieves this selectivity with a linear phase response in
the passband.
With 5% accuracy of the cutoff frequency, the LTC1565-31
can be used in applications requiring pairs of matched
fi lters, such as transceiver I and Q channels. Furthermore,
the differential inputs and outputs provide a simple inter-
face for these wireless systems.
With a single 5V supply and a 2V
P-P
input, the LTC1565-31
features an impressive spurious free dynamic range of
75dB. The maximum signal-to-noise ratio is 78dB and it
is achieved with a 2.5V
P-P
input signal.
The LTC1565-31 features a shutdown mode where power
supply current is typically less than 10μA.
For W-CDMA, 3G, CDMA 2000 and other cellular and
noncellular cutoff frequencies or single-ended I/O, please
contact LTC Marketing for additional information.
n
CDMA Basestations
n
Data Communications
n
Antialiasing Filters
n
Smoothing or Reconstruction Filters
n
Matched Filter Pairs
n
Replacement for LC Filters
n
7th Order, 650kHz Linear Phase Filter in an SO-8
n
Differential Inputs and Outputs
n
Operates on a Single 5V or a ±5V Supply
n
Low Offset: 5mV Typical
n
75dB THD and SNR
n
78dB SNR
n
Shutdown Mode
n
Requires No External Components
n
Requires No External Clock Signal
Single 5V Supply, Differential 650kHz Lowpass Filter
+IN
–IN
GND
V
–
+OUT
–OUT
V
+
SHDN
1
2
3
4
8
7
6
5
LTC1565-31
0.1μF
0.1μF
15645-31 TA01
V
OUT
+
V
OUT
–
V
IN
+
V
IN
–
5V
5V
FREQUENCY (Hz)
10
4
GAIN (dB)
DELAY (μs)
10
5
10
6
10
7
1565 G01
10
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0
2.0
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
1.9
GAIN
DELAY
Frequency Response
650kHz Continuous Time,
Linear Phase Lowpass Filter
LTC1565-31
2
156531fa
Total Supply Voltage ............................................... 11V
Power Dissipation .............................................. 500mW
Operating Temperature Range
LTC1565-31CS8 ...................................... 0°C to 70°C
LTC1565-31IS8 ................................... –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................ 300°C
(Note 1)
The
l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
S
= 5V, R
LOAD
= 10k from each output to AC ground, and Pin 5 open
unless otherwise specifi ed.
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
ORDER INFORMATION
1
2
3
4
8
7
6
5
TOP VIEW
+OUT
–OUT
V
+
SHD
N
+IN
–IN
GND
V
–
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C, θ
JA
= 80°C/ W (NOTE 4)
ELECTRICAL CHARACTERISTICS
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1565-31CS8#PBF LTC1565-31CS8#TRPBF 156531 8-Lead Plastic SO 0°C to 70°C
LTC1565-31IS8#PBF LTC1565-31IS8#TRPBF 56531I 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/
PARAMETER CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage 4.75 11 V
Filter Gain V
IN
= 1V
P-P
, f
IN
= 25kHz
f
IN
= 200kHz (Gain Relative to 25kHz)
f
IN
= 300kHz (Gain Relative to 25kHz)
f
IN
= 500kHz (Gain Relative to 25kHz)
f
IN
= 650kHz (Gain Relative to 25kHz)
f
IN
= 900kHz (Gain Relative to 25kHz)
f
IN
= 1.3MHz (Gain Relative to 25kHz)
f
IN
= 2.3MHz (Gain Relative to 25kHz)
l
l
l
l
l
l
l
–0.3
–0.2
–0.7
–2.2
–4
0
0
–0.4
–1.6
–3
–11
–36
–72
0.3
0.1
–0.1
–0.95
–2
–7
–31
dB
dB
dB
dB
dB
dB
dB
dB
Filter Phase V
IN
= 1V
P-P
, f
IN
= 25kHz
f
IN
= 200kHz
f
IN
= 300kHz
f
IN
= 500kHz
f
IN
= 600kHz
f
IN
= 650kHz
f
IN
= 900kHz
l
l
–162
34
–13
–101
–150
113
60
36
–92
–138
85
Deg
Deg
Deg
Deg
Deg
Deg
Deg
Phase Linearity Ratio of 600kHz Phase/300kHz Phase
l
1.95 2 2.03
Wideband Noise Noise BW = DC to 2 • f
CUTOFF
118 μV
RMS
THD f
IN
= 100kHz, 1V
P-P
(Note 2) 86 dB
Filter Differential DC Swing Maximum Difference Between Pins 7 and 8
V
S
= 5V
V
S
= ±5V
l
l
±1.4
±2.2
±1.7
±2.3
V
V
LTC1565-31
3
156531fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Bias Current 0.1 0.3 0.6 μA
Input Offset Current ±10 nA
Input Resistance Common Mode, V
IN
= 2.5V
Differential
75
145
MΩ
MΩ
Input Capacitance 3pF
Output DC Offset (Note 3) V
S
= 5V
V
S
= ±5V (Note 5)
±5
±5
±12
±12
mV
mV
Output DC Offset Drift V
S
= 5V
V
S
= ±5V
–400
–400
μV/°C
μV/°C
Ground Voltage (Pin 3) in
Single Supply Applications
V
S
= 5V
l
2.49 2.51 2.52 V
SHDN Pin Logic Thresholds V
S
= 5V, Minimum Logical “1”
V
S
= 5V, Maximum Logical “0”
l
l
3.3
4.2 V
V
V
S
= ±5V, Minimum Logical “1”
V
S
= ±5V, Maximum Logical “0”
l
l
2.4
2.9 V
V
SHDN Pin Pull-Up Current V
S
= 5V
V
S
= ±5V
5
9
μA
μA
Power Supply Current V
S
= 5V
V
S
= ±5V
l
l
24
25
31
33
mA
mA
Power Supply Current in Shutdown Mode Shutdown. Includes SHDN Pull-Up Current
V
S
= 5V
V
S
= ±5V
l
l
8
20
16
40
μA
μA
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
S
= 5V, R
LOAD
= 10k from each output to AC ground, and Pin 5 open
unless otherwise specifi ed.
ELECTRICAL CHARACTERISTICS
TYPICAL PERFORMANCE 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: Input and output voltages expressed as peak-to-peak numbers are
assumed to be fully differential.
Note 3: Output DC offset is measured between Pin 8 and Pin 7 with Pin 1
and Pin 2 connected to Pin 3.
Note 4: Thermal resistance varies depending upon the amount of PC board
metal attached to the device. θ
JA
is specifi ed for a 3.8 square inch test
board covered with 2 oz copper on both sides.
Note 5: Output DC offset measurements are performed by automatic test
equipment approximately 0.5 seconds after application of power.
Frequency Response
FREQUENCY (Hz)
10
4
GAIN (dB)
DELAY (μs)
10
5
10
6
10
7
1565 G01
10
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0
2.0
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
1.9
GAIN
DELAY
FREQUENCY (Hz)
25k
–4.5
GAIN (dB)
DELAY (μs)
–3.5
–2.5
–1.5
–0.5
100k 1M
1565 G02
0.5
GAIN
–4.0
–3.0
–2.0
DELAY
–1.0
0
1.0
1.2
1.4
1.6
1.8
2.0
1.1
1.3
1.5
1.7
1.9
5V ±5V
T
A
= 25°C
Passband Gain and Delay
vs Frequency
P1-P3P4-P6P7-P9P10-P12

LTC1565-31IS8#PBF

Mfr. #:
Buy LTC1565-31IS8#PBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter 7th Order Linear Phase Low Pass Filter
Lifecycle:
New from this manufacturer.
Delivery:
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