LTC1565-31CS8#TR [Linear]
LTC1565-31 - 650kHz Continuous Time, Linear Phase Lowpass Filter; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C;
| 型号： | LTC1565-31CS8#TR |
| 厂家： | 
Linear |
| 描述： | LTC1565-31 - 650kHz Continuous Time, Linear Phase Lowpass Filter; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C LTE 光电二极管 有源滤波器 |
| 文件： | 总12页 (文件大小：173K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1565-31
650kHz Continuous Time,
Linear Phase Lowpass Filter
FEATURES
DESCRIPTION
The LTC®1565-31 is a 7th order, continuous time, linear
phase lowpass filter. The selectivity of the LTC1565-31,
combined with its linear phase and dynamic range, make
it suitable for filtering in data communications or data
acquisition systems. The filter attenuation is 36dB at
2× fCUTOFF and at least 72dB for frequencies above 3×
fCUTOFF. Unlike comparable LC filters, the LTC1565-31
achieves this selectivity with a linear phase response in
the passband.
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
Low Offset: 5mV Typical
75dB THD and SNR
78dB SNR
Shutdown Mode
Requires No External Components
n
n
n
n
n
n
Requires No External Clock Signal
With5%accuracyofthecutofffrequency,theLTC1565-31
can be used in applications requiring pairs of matched
filters,suchastransceiverIandQchannels.Furthermore,
the differential inputs and outputs provide a simple inter-
face for these wireless systems.
APPLICATIONS
n
CDMA Basestations
n
Data Communications
Withasingle5Vsupplyanda2VP-P input,theLTC1565-31
features an impressive spurious free dynamic range of
75dB. The maximum signal-to-noise ratio is 78dB and it
is achieved with a 2.5VP-P input signal.
n
Antialiasing Filters
n
Smoothing or Reconstruction Filters
n
Matched Filter Pairs
n
Replacement for LC Filters
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.
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.
TYPICAL APPLICATION
Frequency Response
10
0
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
Single 5V Supply, Differential 650kHz Lowpass Filter
GAIN
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
1
2
8
7
+
–
+
–
V
V
V
V
+IN
–IN
+OUT
–OUT
IN
IN
OUT
OUT
LTC1565-31
5V
DELAY
5V
3
4
6
5
0.1μF
+
GND
V
0.1μF
–
V
SHDN
15645-31 TA01
4
5
6
7
10
10
10
10
FREQUENCY (Hz)
1565 G01
156531fa
1
LTC1565-31
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Note 1)
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
TOP VIEW
+IN
–IN
1
2
3
4
8
7
6
5
+OUT
–OUT
+
GND
V
–
V
SHDN
S8 PACKAGE
8-LEAD PLASTIC SO
T
= 150°C, θ = 80°C/ W (NOTE 4)
JA
JMAX
ORDER INFORMATION
LEAD FREE FINISH
LTC1565-31CS8#PBF
LTC1565-31IS8#PBF
TAPE AND REEL
LTC1565-31CS8#TRPBF 156531
LTC1565-31IS8#TRPBF 56531I
PART MARKING
PACKAGE DESCRIPTION
8-Lead Plastic SO
TEMPERATURE RANGE
0°C to 70°C
8-Lead Plastic SO
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
The l denotes the specifications which apply over the full operating
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at TA = 25°C. VS = 5V, RLOAD = 10k from each output to AC ground, and Pin 5 open
unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
Filter Gain
4.75
11
V
l
l
l
l
l
l
l
V
= 1V , f = 25kHz
–0.3
–0.2
–0.7
–2.2
–4
0
0.3
0.1
dB
dB
dB
dB
dB
dB
dB
dB
IN
P-P IN
f
IN
f
IN
f
IN
f
IN
f
IN
f
IN
f
IN
= 200kHz (Gain Relative to 25kHz)
= 300kHz (Gain Relative to 25kHz)
= 500kHz (Gain Relative to 25kHz)
= 650kHz (Gain Relative to 25kHz)
= 900kHz (Gain Relative to 25kHz)
= 1.3MHz (Gain Relative to 25kHz)
= 2.3MHz (Gain Relative to 25kHz)
0
–0.4
–1.6
–3
–11
–36
–72
–0.1
–0.95
–2
–7
–31
Filter Phase
V
IN
= 1V , f = 25kHz
–13
–101
–150
113
60
Deg
Deg
Deg
Deg
Deg
Deg
Deg
P-P IN
f
IN
f
IN
f
IN
f
IN
f
IN
f
IN
= 200kHz
= 300kHz
= 500kHz
= 600kHz
= 650kHz
= 900kHz
l
l
–162
34
–138
85
36
–92
l
Phase Linearity
Wideband Noise
THD
Ratio of 600kHz Phase/300kHz Phase
Noise BW = DC to 2 • f
1.95
2
2.03
118
86
μV
RMS
CUTOFF
f
= 100kHz, 1V (Note 2)
dB
IN
P-P
Filter Differential DC Swing
Maximum Difference Between Pins 7 and 8
V = 5V
l
l
1.4
2.2
1.7
2.3
V
V
S
V = 5V
S
156531fa
2
LTC1565-31
The l denotes the specifications which apply over the full operating
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at TA = 25°C. VS = 5V, RLOAD = 10k from each output to AC ground, and Pin 5 open
unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
0.3
10
MAX
UNITS
μA
Input Bias Current
Input Offset Current
Input Resistance
0.1
0.6
nA
Common Mode, V = 2.5V
Differential
75
145
MΩ
MΩ
IN
Input Capacitance
3
pF
Output DC Offset (Note 3)
V = 5V
S
5
5
12
12
mV
mV
S
V = 5V (Note 5)
Output DC Offset Drift
V = 5V
S
–400
–400
μV/°C
μV/°C
S
V = 5V
l
Ground Voltage (Pin 3) in
Single Supply Applications
V = 5V
2.49
2.51
2.52
4.2
V
S
l
l
SHDN Pin Logic Thresholds
V = 5V, Minimum Logical “1”
V
V
S
V = 5V, Maximum Logical “0”
3.3
2.4
S
l
l
V = 5V, Minimum Logical “1”
2.9
V
V
S
V = 5V, Maximum Logical “0”
S
SHDN Pin Pull-Up Current
V = 5V
S
5
9
μA
μA
S
V = 5V
l
l
Power Supply Current
V = 5V
S
24
25
31
33
mA
mA
S
V = 5V
Power Supply Current in Shutdown Mode
Shutdown. Includes SHDN Pull-Up Current
l
l
V = 5V
8
20
16
40
μA
μA
S
V = 5V
S
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
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.
metal attached to the device. θ is specified for a 3.8 square inch test
JA
board covered with 2 oz copper on both sides.
Note 2: Input and output voltages expressed as peak-to-peak numbers are
assumed to be fully differential.
Note 5: Output DC offset measurements are performed by automatic test
equipment approximately 0.5 seconds after application of power.
TYPICAL PERFORMANCE CHARACTERISTICS
Passband Gain and Delay
vs Frequency
Frequency Response
10
0
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.5
0
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
GAIN
5V
GAIN
5V
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–4.5
DELAY
DELAY
T
A
= 25°C
4
5
6
7
25k
100k
1M
10
10
10
10
FREQUENCY (Hz)
FREQUENCY (Hz)
1565 G02
1565 G01
156531fa
3
LTC1565-31
TYPICAL PERFORMANCE CHARACTERISTICS
Stopband Gain vs Frequency
Over Temperature
Passband Gain vs Frequency
Stopband Gain vs Frequency
Over Temperature
–40
–50
–60
–70
–80
–90
0.5
0.4
–40
–50
–60
–70
–80
–90
V
S
= 5V
V
= 5V
S
0.3
0.2
–40°C
25°C
–40°C
25°C
0.1
85°C
0
85°C
V
= 5V
5V
S
–0.1
–0.2
–0.3
–0.4
–0.5
V
=
S
25k
100k
FREQUENCY (Hz)
400k
1.5
1.8
2.1
2.4
2.7
3.0
1.5
1.8
2.1
2.4
2.7
3.0
FREQUENCY (MHz)
FREQUENCY (MHz)
1565 G03
1565 G04
1565 G05
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Supply Current vs Temperature
110
80
70
60
50
40
30
26
25
V
V
T
= 1V
= 5V
V
V
T
= 200mV
= 5V
IN
S
A
P-P
IN
S
A
P-P
= 25°C
= 25°C
100
90
V
S
= 5V
80
70
V
S
= 5V
24
23
60
50
3
4
5
6
7
3
4
5
6
7
10
10
10
FREQUENCY (Hz)
10
10
10
10
10
FREQUENCY (Hz)
10
10
30
TEMPERATURE (°C)
70
90
–50 –30 –10 10
50
1565 G06
1565 G07
1565 G08
PIN FUNCTIONS
+IN, –IN (Pins 1, 2): Input Pins. Signals can be applied
to either or both input pins. The typical DC gain from dif-
ferential inputs (Pin 1 to Pin 2) to the differential outputs
(Pin 8 to Pin 7) is 1.0V/V. The input range is described in
the Applications Information section.
ceramic capacitor to Pin 4. For dual supply operation,
connect Pin 3 to a high quality DC ground. A ground
plane should be used. A poor ground will increase noise
and distortion.
The impedance seen at Pin 3 is 2.5kΩ in normal mode. In
shutdown, the pin is internally biased to the same levels
as normal mode. The impedance in shutdown mode
is typically 500kΩ but varies with supply voltage and
temperature.
GND (Pin 3): Ground. The ground pin is the reference
voltage for the filter and is internally biased to one-half
the total power supply voltage of the filter, maximizing the
dynamic range of the filter. For single supply operation,
the ground pin should be bypassed with a quality 0.1μF
156531fa
4
LTC1565-31
PIN FUNCTIONS
–
+
V , V (Pins 4, 6): Power Supply Pins. For a single 5V
supply (Pin 4 grounded), a quality 0.1μF ceramic bypass
capacitor is required from the positive supply pin (Pin 6)
to the negative supply pin (Pin 4). The bypass should be
as close as possible to the IC. For dual supply applications
(Pin 3 is grounded), bypass Pin 6 to Pin 3 and Pin 4 to
Pin 3 with a quality 0.1μF ceramic capacitor.
SHDN (Pin 5): Shutdown. When the Pin 5 voltage is low,
the LTC1565-31 goes into the current saving shutdown
mode. Pin 5 has a 4μA pull-up current. Leaving Pin 5 open
will place the LTC1565-31 in its normal operating mode.
–OUT, +OUT (Pins 7, 8): Output Pins. Pins 7 and 8 are the
filter differential output. Each pin can drive 1kΩ or 300pF
loads. The common mode voltage at the output pins is
the same as the voltage at Pin 3.
The maximum voltage difference between the ground
pin (Pin 3) and the positive supply pin (Pin 6) should not
exceed 5.5V.
BLOCK DIAGRAM
+IN
1
+
–
+OUT
–OUT
8
7
R
R
OUTPUT
BUFFER
7th ORDER
LINEAR
+
–
PHASE
FILTER
NETWORK
OUTPUT
BUFFER
–
+
+
INPUT BUFFERS
–IN
2
3
4
WITH COMMON MODE
TRANSLATION CIRCUIT
V
SHUTDOWN
SWITCH
~1M
5k
+
GND
6
V
5k
SHUTDOWN
SWITCH
~1M
+
V
–
V
4μA
–
V
SHUTDOWN
5
SHDN
1565-31 BD
156531fa
5
LTC1565-31
APPLICATIONS INFORMATION
Interfacing to the LTC1565-31
Input Common Mode and Differential Voltage Range
The difference between the voltages at Pin 1 and Pin 2 is
the“differentialinputvoltage.”Theaverageofthevoltages
at Pin 1 and Pin 2 is the “common mode input voltage.”
The difference between the voltages at Pin 7 and Pin 8
is the “differential output voltage.” The average of the
voltages at Pin 7 and Pin 8 is the “common mode output
voltage.”Theinputandoutputcommonmodevoltagesare
independent.Theinputcommonmodevoltageissetbythe
signal source, if DC coupled, or by the biasing network if
AC coupled (Figures 1 and 2). The output common mode
voltage is equal to the voltage of Pin 3, the GND pin. The
GND pin is biased to one-half of the supply voltage by an
internal resistive divider (see Block Diagram). To alter the
common mode output voltage, Pin 3 can be driven with
an external voltage source or resistor network. If external
resistors are used, it is important to note that the internal
5k resistors can vary 20% (their ratio only varies 1%).
The output can also be AC coupled.
The range of voltage each input can support while operat-
ing in its linear region is typically 0.8V to 3.7V for a single
5V supply and –4.2V to 3.2V for a 5V supply. Therefore,
the filter can accept a variety of common mode input volt-
ages. Figures 3 and 4 show the THD of the filter versus
common mode input voltage with a 2V
input signal.
differential
P-P
–30
–40
V
= 5V
S
–50
–60
–70
–80
–90
V
IN
= 2V
P-P
IN
f
= 100kHz
–5 –4 –3 –2 –1
0
1
2
3
4
5
INPUT COMMON MODE VOLTAGE (V)
1
2
8
7
+
–
V
V
+IN
–IN
+OUT
–OUT
OUT
OUT
1565-31 F03
Figure 3. THD vs Common Mode Input Voltage
+
–
+
–
+
V
V
IN
IN
5V
–
LTC1565-31
3
4
6
5
–30
+
GND
V
0.1μF
0.1μF
–
V
SHDN
V
= 5V
S
–40
–50
15645-31 F01
DC COUPLED INPUT
+
–
V
+ V
IN
IN
V
V
(COMMON MODE) =
IN
2
+
–
+
V
+ V
2
V
OUT
OUT
–60
(COMMON MODE) =
=
OUT
2
Figure 1
–70
–80
V
IN
= 2V
P-P
= 100kHz
IN
f
0.1μF
100k
1
2
8
7
0.5
1.0
2.0
2.5
3.0
3.5
1.5
+
–
V
V
+IN
–IN
+OUT
–OUT
OUT
INPUT COMMON MODE VOLTAGE (V)
OUT
1565-31 F04
+
–
+
–
+
–
V
V
IN
IN
0.1μF
100k
1μF
5V
LTC1565-31
Figure 4. THD vs Common Mode Input Voltage
3
4
6
5
+
GND
V
0.1μF
–
Figure 5 shows the THD and S/N ratio versus differential
input voltage level for both a single 5V supply and a 5V
supply. The common mode voltage of the input signal is
one-half the total power supply voltage of the filter. The
spurious free dynamic range, where the THD and S/N
ratio are equal, is 75dB to 76dB when the differential input
V
SHDN
15645-31 F02
AC COUPLED INPUT
(COMMON MODE) = V
V
(COMMON MODE)
IN
OUT
+
V
=
2
Figure 2
voltage level is 2V ; that is, for a single 5V supply, the
P-P
156531fa
6
LTC1565-31
APPLICATIONS INFORMATION
–30
Output Common Mode and Differential Voltage Range
THD: V = 5V, V = 2.5V
S
S
CM
THD: V
SNR
= 100kHz
= 5V, V = 0V
CM
–40
–50
–60
–70
–80
–90
Theoutputisafullydifferentialsignalwithacommonmode
level equal to the voltage at Pin 3. The specifications in
the Electrical Characteristics table assume the inputs are
drivendifferentiallyandtheoutputisobserveddifferentially.
However, Pin 8 can be used as a single-ended output by
simply floating Pin 7. Pin 7 can be used as an inverting
single-ended output by floating Pin 8. Using Pins 7 or 8
as single-ended outputs will decrease the performance.
f
IN
0.5
1.5
2.0
2.5
3.0
3.5
1.0
Thecommonmodeoutputvoltagecanbeadjustedbyover-
drivingthevoltagepresentonPin3.Thebestperformance
is achieved using a common mode output voltage that is
equal to mid supply (the default Pin 3 voltage). Figures
7 and 8 illustrate the THD versus output common mode
DIFFERENTIAL INPUT (
)
P-P
1565-31 F05
Figure 5. Dynamic Range Diff-In, Diff-Out
input voltages are Pin 1 = 2.5V DC 0.5V and Pin 2 = 2.5V
DC 0.5V. Also note Figure 5 shows a 78dB SNR ratio for
higher THD levels.
voltagefora2V differentialinputvoltageandacommon
P-P
mode input voltage that is 0.5V below mid supply.
0
As seen in Figures 3 and 4, the spurious free dynamic
rangecanbeoptimizedbysettingtheinputcommonmode
voltageslightlybelowone-halfofthepowersupplyvoltage,
i.e., 2V for a single 5V supply and –0.5V for a 5V supply.
Figure 6 shows the THD and SNR ratio versus differential
input voltage level for both a single 5V supply and a 5V
supply when the common mode input voltage is 2V and
–0.5V respectively.
V
V
V
= 2V 100kHz
P-P
IN
S
= 5V
–10
–20
–30
= 2V
IN(CM)
–40
–50
–60
–70
–80
For best performance, the inputs should be driven dif-
ferentially. For single-ended signals, connect the unused
input to Pin 3 or a common mode reference.
2.0
2.5
3.5
1.0
1.5
4.0
3.0
COMMON MODE OUTPUT VOLTAGE (V)
1565-31 F07
–30
Figure 7. THD vs Common Mode Output Voltage
THD: V = 5V, V = 2V
S
S
CM
THD: V
SNR
= 100kHz
= 5V, V = –0.5V
CM
–40
–50
–60
–70
–80
–90
0
V
V
V
= 2V 100kHz
P-P
IN
S
f
IN
=
5V
= –0.5V
–10
–20
–30
–40
–50
–60
–70
–80
–90
IN(CM)
0.5
1.5
2.0
2.5
3.0
3.5
1.0
DIFFERENTIAL INPUT VOLTAGE (V
)
P-P
–2 –1
0
1
2
–4 –3
3
4
1565-31 F06
COMMON MODE OUTPUT VOLTAGE (V)
1565-31 F08
Figure 6. THD vs VIN for a Common Mode
Input Voltage 0.5V Below Mid Supply
Figure 8. THD vs Common Mode Output Voltage
156531fa
7
LTC1565-31
APPLICATIONS INFORMATION
Output Drive
in the filter passband and cannot be removed with post
filtering (Table 1). Table 2 lists the typical change in wide-
band noise with supply voltage.
Pin 7 and Pin 8 can drive a 1kΩ or 300pF load connected
to AC ground with a 0.5V signal (corresponding to a
2V
differential signal). For differential loads (loads
Table 1. Wideband Noise vs Bandwidth, Single 5V Supply
P-P
connected from Pin 7 to Pin 8) the outputs can produce a
BANDWIDTH
TOTAL INTEGRATED NOISE
2V differentialsignalacross2kΩor150pF. Forsmaller
DC to f
104μV
P-P
CUTOFF
RMS
signal amplitudes the outputs can drive correspondingly
DC to 2 • f
118μV
RMS
CUTOFF
larger loads.
Table 2. Wideband Noise vs Supply Voltage, fCUTOFF = 650kHz
TOTAL INTEGRATED NOISE
Noise
POWER SUPPLY
DC TO 2 • f
CUTOFF
The wideband noise of the filter is the RMS value of the
device’soutputnoisespectraldensity.Thewidebandnoise
data is used to determine the operating signal-to-noise at
a given distortion level. Most of the noise is concentrated
5V
5V
118μV
120μV
RMS
RMS
TYPICAL APPLICATIONS
Test Circuit for Single 5V Supply Operation
4.99k
AMPLIFIERS A1, A2 AND A3 ALLOW THE USE OF A
5V
GROUND-REFERENCED SINGLE-ENDED AC SOURCE AS THE
INPUT SIGNAL AND A SEPARATE GROUND-REFERENCED DC
SOURCE TO PROVIDE THE INPUT DC COMMON MODE VOLTAGE
0.1μF
4.99k
–
2
3
7
AMPLIFIERS A4 AND A5 ALLOW MONITORING/MEASURING
THE DIFFERENTIAL OUTPUT WITH A SINGLE-ENDED,
GROUND-REFERENCED INSTRUMENT
6
A1
LT®1809
2.49k
10μF
+
4
2.49k
4.99k
5V
5V
0.1μF
4.99k
2.49k
0.1μF
V
IN
4.99k
–
+
2
3
+V /2 + V
IN
1
2
3
4
8
7
6
5
–
+
7
2
3
CM
CM
7
+IN
+OUT
–OUT
6
A2
LT1809
6
A4
LT1809
V
OUT
(SINGLE ENDED)
V
2.49k
–V /2 + V
IN
CM
–IN
4
4
+
4.99k 10μF
2.49k
5V
LTC1565-31
–
+
GND
V
1k
0.1μF
0.1μF
4.99k
5V
–
V
SHDN
19k
0.01μF
0.1μF
5V
–
+
2
3
7
0.1μF
4.99k
2.49k
20Ω
–
+
6
2
3
A5
LT1812
7
+
1k
V /2
6
A3
LT1809
2.2μF
4
0.1μF
1565-31 TA08
4
156531fa
8
LTC1565-31
TYPICAL APPLICATIONS
Single-Ended Input/Output Dual Supply Filter
4.99k
5V
0.1μF
0.1μF
4.99k
–
2
3
1
8
7
6
5
7
V
+IN
+OUT
–OUT
IN
6
V
LT1809
OUT
2.49k
+
2
–IN
4
LTC1565-31
3
+
–5V
GND
V
5V
R2
0.1μF
0.1μF
2.49k
4
–
1565-31 TA09
–5V
V
SHDN
0.1μF
NOTE: FOR SINGLE 5V SUPPLY CONNECTION, PIN 4 (LTC1565-31)
AND PIN 4 (LT1809) SHOULD BE GROUNDED AND RESISTOR R2
SHOULD BE DC BIASED AT APPROXIMATELY 2.5V
(SEE TEST CIRCUIT FOR SINGLE SUPPLY OPERATION)
A Fully Differential Filter with Adjustable Output Common Mode Voltage
+
–
1
2
3
4
8
7
6
5
(V – V )R2
R1 + R2
+
–
+
–
–
V
V
*
*
V
V
V
= V
+
+IN
+OUT
–OUT
IN
OUT
OUT
OUT(CM)
–IN
IN
LTC1565-31
+
GND
V
5V
0.1μF
–
–5V
V
SHDN
0.1μF
–3V ≤ V
≤ 3V
OUT(CM)
5V
*–3.4V ≤ V
IN(CM)
DIFFERENT FROM V
OUT(CM)
≤ 2.5V
IN(CM)
+
V
CAN BE EQUAL OR
V
0.1μF
0.1μF
–
+
2
3
7
6
NOTE: FOR SINGLE 5V SUPPLY OPERATION,
PIN 4 (LTC1565-31), PIN 4 (LT1812) AND
RESISTOR R2 SHOULD BE GROUNDED
R1
R2
LT1812
4
100pF
0.1μF
–5V
1565-31 TA10
–
V
156531fa
9
LTC1565-31
TYPICAL APPLICATIONS
Simple Pulse Shaping Circuit for Single 5V Operation, 1.25Mbps 2 Level Data
5V
4.99k
4.99k
1
2
8
7
+
–
4.99k
V
V
+IN
–IN
+OUT
–OUT
OUT
1.25Mbps
DATA
OUT
LTC1565-31
3
4
6
5
+
GND
V
5V
0.1μF
0.1μF
–
V
SHDN
15645-31 TA04
250ns/DIV
1565-31 TA05
Simple Pulse Shaping Circuit for Single 5V Operation, 2Mbps (1Msps) 4 Level Data
5V
4.99k
4.99k
10k
D1
1Msps
DATA
1
2
8
7
+
–
V
V
+IN
–IN
+OUT
–OUT
OUT
D0
OUT
4.99k
LTC1565-31
3
4
6
5
+
GND
V
5V
0.1μF
0.1μF
–
V
SHDN
15645-31 TA06
200ns/DIV
1565-31 TA07
156531fa
10
LTC1565-31
TYPICAL APPLICATIONS
Narrowband Cellular Basestation Receiver
LTC1565-31
LPF
ADC
ADC
0°
I
RF/IF
SECTION
90°
DSP
LO
Q
90°
LTC1565-31
LPF
1565-31 TA03
PACKAGE DESCRIPTION
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
.045 ±.005
.160 ±.005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
SO8 0303
156531fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LTC1565-31
TYPICAL APPLICATION
Selective 620kHz CDMA Filter
R5
1k
5V
R4
1.13k
C6
0.1μF
R6
1k
C3
18pF
C4
18pF
1
2
3
4
8
7
6
5
1
2
8
7
V
V
R1
R2
R3
1.24k
+IN
–IN
+OUT
–OUT
OUT1
OUT2
C5
180pF
562Ω
562Ω
U1
LT1813
V
V
IN1
U2
LTC1565-31
FGND
C1
150pF
C2
1000pF
3
4
6
5
+
GND
V
C8
0.1μF
C7
0.1μF
–
R7
562Ω
R8
562Ω
R9
V
SHDN
1.24k
15645-31 TA11
R11
1k
IN2
5V
R10
1.13k
R12
1k
Frequency Response
0
–6
–12
–18
–24
–30
–36
–42
–48
100k
1M
FREQUENCY (Hz)
1565 TA12
RELATED PARTS
PART NUMBER
LTC1560-1
DESCRIPTION
COMMENTS
1MHz/500kHz Continuous Time, Low Noise, Lowpass Elliptic Filter
Universal 8th Order Active RC Filters
f
= 500kHz or 1MHz
CUTOFF
LTC1562/LTC1562-2
f
f
= 150kHz (LTC1562),
= 300kHz (LTC1562-2)
CUTOFF(MAX)
CUTOFF(MAX)
LTC1563-2/LTC1563-3
LTC1569-6/LTC1569-7
4th Order Active RC Lowpass Filters
f
= 256kHz
CUTOFF(MAX)
Self Clocked, 10th Order Linear Phase Lowpass Filters
f
f
/f
/f
= 64/1, f
= 32/1, f
= 75kHz (LTC1569-6)
= 300kHz (LTC1569-7)
CLK CUTOFF
CLK CUTOFF
CUTOFF(MAX)
CUTOFF(MAX)
156531fa
LT 0809 REV A • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
© LINEAR TECHNOLOGY CORPORATION 2000
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号：
SI9130DB
5- and 3.3-V Step-Down Synchronous ConvertersWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1-E3
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135_11
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9136_11
Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
©2020 ICPDF网 联系我们和版权申明