LTC1566-1CS8 [Linear]
Low Noise 2.3MHz Continuous Time Lowpass Filter; 低噪声2.3MHz的连续时间低通滤波器
| 型号： | LTC1566-1CS8 |
| 厂家： | 
Linear |
| 描述： | Low Noise 2.3MHz Continuous Time Lowpass Filter |
| 文件： | 总8页 (文件大小：188K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1566-1
Low Noise 2.3MHz
Continuous Time Lowpass Filter
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FEATURES
DESCRIPTIO
■
7th Order, 2.3MHz Lowpass Filter in an SO-8
The LTC®1566-1 is a 7th order continuous time lowpass
filter with 12dB of passband gain. The selectivity, linearity
and dynamic range makes the LTC1566-1 suitable for
filtering in data communications or data acquisition
systems.Thefilterattenuationis40dBat1.5× fCUTOFF and
at least 60dB for frequencies above 10MHz.
■
62µVRMS Input Referred Noise
■
Operates on a Single 5V or a ±5V Supply
Differential Inputs and Outputs
Low Offset (3mV typical, 10mVMAX
Adjustable Output Common Mode Voltage
40dB Attenuation at 1.5 × fCUTOFF
Requires No External Components
■
■
)
■
■
■
The LTC1566-1 has an input referred noise of 62µVRMS in
a 2MHz bandwidth. In receiver applications where the
signal levels are small, the filter features 71dB of spurious
free dynamic range.
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APPLICATIO S
With 5% accuracy of the cutoff frequency, the LTC1566-1
can be used in applications requiring pairs of matched
filters, such as transceiver I and Q channels.
■
WCDMA Basestations
■
Communication Filters
■
Antialiasing Filters
Smoothing or Reconstruction Filters
Matched Filter Pairs
Replacement for LC Filters
■
The differential inputs and outputs provide a simple inter-
face for wireless systems. The high impedance inputs are
easily coupled to differential demodulators or D/A con-
verters. The output DC common mode voltage and output
DC offset voltage are adjustable so the signal path can be
optimized for driving an A/D converter or differential
modulator.
■
■
Other cutoff frequencies and single-ended I/O can be
provided upon request. Please contact LTC Marketing.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
Frequency Response
20
10
1000
900
800
700
600
500
400
300
200
100
0
GAIN
Single 5V Supply, Differential
2.3MHz Lowpass Filter
0
–10
–20
–30
–40
–50
–60
–70
–80
1
2
3
8
7
6
5
+
–
+
–
+
+
IN
IN
+
OUT
OUT
V
LTC1566-1
V
V
IN
OUT
–
DELAY
–
GND
5V
0.1µF
0.1µF
10k
10k
4
–
V
V
ODC
0.1
1.0
10
100
FREQUENCY (MHz)
1566-1 TA01
1566-1 G01
sn15661 1566-1fs
1
LTC1566-1
W W U W
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ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
ORDER PART
TOP VIEW
Total Supply Voltage................................................ 11V
Power Dissipation.............................................. 500mW
Operating Temperature Range
LTC1566-1CS .......................................... 0°C to 70°C
LTC1566-1IS ...................................... –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
NUMBER
+
–
+
–
IN
IN
1
2
3
4
8
7
6
5
OUT
OUT
LTC1566-1CS8
LTC1566-1IS8
+
GND
V
–
V
V
ODC
S8 PART MARKING
S8 PACKAGE
8-LEAD PLASTIC SO
15661
15661I
TJMAX = 125°C, θJA = 80°C/W
(Note 4)
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V (V+ = 5V, V– = 0V), RLOAD = 10k from each output to AC ground,
Pin 5 connected to Pin 3, Pin 3 biased to mid supply, unless otherwise specified.
PARAMETER
Filter Gain, V = 5V
CONDITIONS
MIN
TYP
MAX
UNITS
V
= 0.25V
f
= 20kHz to 100kHz
●
11.8
12.1
12.3
dB
S
IN
P-P
IN
f
f
f
f
f
f
= 1.8MHz (Gain Relative to 100kHz)
= 2MHz (Gain Relative to 100kHz)
= 2.3MHz (Gain Relative to 100kHz)
= 3MHz (Gain Relative to 100kHz)
= 5MHz (Gain Relative to 100kHz)
= 10MHz (Gain Relative to 100kHz)
●
●
●
●
–0.35
–0.85
–7.5
0
–0.1
–3
–22
–42
–62
0.5
0.5
–0.95
–17
dB
dB
dB
dB
dB
dB
IN
IN
IN
IN
IN
IN
Filter Phase, V = ±5V
V
V
= 0.25V
= 0.25V
f
f
= 900kHz
= 1.8MHz
●
●
●
●
–160
–320
1.9
–150
–285
1.95
12.1
–135
–265
2
deg
deg
S
IN
IN
P-P
P-P
IN
IN
Phase Linearity, V = ±5V
Ratio of phases: 1.8MHz/900kHz
S
Filter Gain, V = ±5V
f
= 20kHz to 100kHz
11.9
12.3
dB
S
IN
f
f
f
f
f
f
f
= 900kHz (Gain Relative to 100kHz)
= 1.8MHz (Gain Relative to 100kHz)
= 2MHz (Gain Relative to 100kHz)
= 2.3MHz (Gain Relative to 100kHz)
= 3MHz (Gain Relative to 100kHz)
= 5MHz (Gain Relative to 100kHz)
= 10MHz (Gain Relative to 100kHz)
●
●
●
●
●
–0.2
–0.3
–0.55
–6
0
0.2
0.7
0.75
–0.3
–16
dB
dB
dB
dB
dB
dB
dB
IN
IN
IN
IN
IN
IN
IN
0.1
0.1
–2
–20
–61
–61
Input Referred Wideband Noise
THD
Noise BW = 50kHz to 2MHz
= 100kHz, V = 2V (Note 2)
62
80
µV
RMS
f
dB
IN
OUT
P-P
Filter Differential DC Swing
Maximum Difference Between Pins 7 and Pin 8
with Pin 5, Pin 3 Biased to Mid Supply
V = 5V
V = ±5V
S
●
●
±1.3
±2.7
±1.7
±2.9
V
P
V
P
S
Input Bias Current
Input Offset Current
Input Resistance
●
300
±10
70
600
nA
nA
Common Mode, V = 1.5V to 3.5V
MΩ
MΩ
pF
IN
Differential
140
2
Input Capacitance
Output DC Offset
(Notes 3, 5)
V = 5V
V = ±5V
S
±3
±3
±10
±10
mV
mV
S
sn15661 1566-1fs
2
LTC1566-1
ELECTRICAL CHARACTERISTICS
and Pin 5 connected to Pin 3 unless otherwise specified
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V (V+ = 5V, V– = 0V), RLOAD = 10k from each output to AC ground,
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output DC Offset Drift
V = 5V
V = ±5V
S
–160
–160
µV/°C
µV/°C
S
Output DC Common Mode Voltage
Power Supply Current
V = 5V, V = ±2.5V
–80
mV
S
S
V = 5V
V = ±5V
S
●
●
24
25
31
33
mA
mA
S
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 4: Thermal resistance varies depending upon the amount of PC board
metal attached to the device. θ is specified for a 3.8 square inch test
JA
board covered with 2oz copper on both sides.
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,
Note 5: Output DC offset measurements are performed by automatic test
equipment approximately 0.5 seconds after application of power.
Pin 2 and Pin 5 connected to Pin 3. Pin 3 biased to mid supply.
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TYPICAL PERFOR A CE CHARACTERISTICS
Passband Gain
Passband Gain and Delay
vs Frequency
vs Frequency and Temperature
Stopband Gain vs Frequency
1
12.4
12.0
11.6
11.2
10.8
10.4
–10
–20
–30
–40
–50
–60
12.4
12.0
11.6
11.2
10.8
10.4
T
A
= 25°C
T = 25°C
A
T
= 85°C
A
T
= 25°C
A
T
= –40°C
GAIN ±5V
A
±5V
GAIN 5V
5V
DELAY
0
5M
10k
100k
1M
3
4
5
6
7
8
9
10
10k
100k
1M
5M
FREQUENCY (Hz)
FREQUENCY (MHz)
FREQUENCY (Hz)
1566-1 G02
1566-1 G04
1566-1 G03
Stopband Gain vs Frequency
and Temperature
500kHz Distortion
vs Input Level, VS = 5V
450k/2M Intermodulation, VS = 5V
20
0
–10
–20
–30
–40
–50
–60
40
20
V
S
= 5V
1dB COMPRESSION
0
450k
1.55M
2M
2.45M
3.55M
NOISE FLOOR
1.1M
–20
–40
–60
–80
–100
T
= 25°C
A
–20
–40
–60
–80
–100
500kHz
T
= –40, 85°C
1MHz
A
1.5MHz
NOISE FLOOR
OIP = 38dBm
3
OIP = 74dBm
2
–25
–20
–15
–10
V (dBm)
X
–5
0
3
4
5
6
7
8
9
10
–5
5
10
–25 –20 –15 –10
0
FREQUENCY (MHz)
V
IN
(dbm)
1566-1 G05
V
= V COS(2π • 450kHz) + V COS (2π • 2MHz)
X X
1566-1 G06
IN
1566-1 G07
sn15661 1566-1fs
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LTC1566-1
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TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Supply Current vs Temperature
90
80
70
60
50
40
30
70
60
50
40
30
20
23
22
21
V
V
T
= 1V
= 5V
V
V
T
= 0.2V
P-P
IN
S
A
P-P
IN
S
A
= 5V
= 25°C
= 25°C
V
S
= ±5V
V
S
= 5V
–30 –10 10
30
50
90
1k
10k
100k
1M
10M
1k
10k
100k
1M
10M
–50
70
FREQUENCY (Hz)
FREQUENCY (Hz)
TEMPERATURE (°C)
1566-1 G10
1566-1 G09
1566-1 G08
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PI FU CTIO S
IN+, IN– (Pins 1, 2): Input Pins. Signals can be applied to
either or both input pins. The DC gain from differential
inputs (Pin 1 to Pin 2) to the differential outputs (Pin 8 to
Pin 7) is 4V/V. The input range is described in the Applica-
tions Information section.
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.
VODC (Pin 5): Output DC Offset. Pin 5 is the DC reference
voltage for Pin 8. By applying a DC offset between Pin 3
andPin5,aDCoffsetwillbeaddedtothedifferentialsignal
between Pin 7 and Pin 8. Like the GND pin, the VODC pin is
a high impedance which requires no bias current. Care
should be taken when biasing Pin 5 since noise between
Pin3andPin5willappearatthefilteroutputunattenuated.
The frequency response of Pin 5 is described in the
Applications Information section.
OUT–, OUT+ (Pins 7, 8): Output Pins. Pins 7 and 8 are the
filter differential outputs. Each pin can drive 1kΩ or 300pF
loads. The DC reference voltage of Pin 8 is the same as the
voltage at Pin 5. The DC reference voltage of Pin 7 is the
same as the voltage at Pin 3.
GND (Pin 3): Ground. The ground pin is the reference
voltage for the filter. This is a high impedance input, which
requires an external biasing network. Biasing GND to
one-half the total power supply voltage of the filter maxi-
mizes the dynamic range. For single supply operation the
ground pin should be bypassed with a quality 0.1µF
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.Pin3alsoservesastheDCreferencevoltagefor
Pin 7.
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)
sn15661 1566-1fs
4
LTC1566-1
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BLOCK DIAGRA
+
1
+
IN
1×
–
+
+
8
OUT
OUT
–
1×
1×
+
–
R
R
7th ORDER
FILTER NETWORK
WITH 12dB GAIN
–
+
1×
–
+
–
–
IN
2
3
4
7
6
5
INPUT AMPLIFIERS
WITH COMMON MODE
TRANSLATION CIRCUIT
+
V
GND
UNITY GAIN OUTPUT
BUFFERS WITH DC
REFERENCE
–
V
V
ODC
ADJUSTMENT
1566-1 BD
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APPLICATIO S I FOR ATIO
biasing network, if AC coupled (Figures 1 and 2). The
output can also be AC coupled.
Interfacing to the LTC1566-1
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 volt-
ages at Pin 7 and Pin 8 is the “common mode output
voltage.” The input and output common mode voltages
are independent. The input common mode voltage is set
by the signal source, if DC coupled, or by an external
The output common mode voltage is equal to the voltage
of Pin 3, the GND pin, whenever Pin 5 is shorted to Pin 3.
In configurations where Pin 5, the VODC pin, is not shorted
to Pin 3, the output common mode voltage is equal to the
average of the voltages at Pin 3 and Pin 5. The operation
of Pin 5 is described in the paragraph “Output DC Offset
Control”.Pin3isahighimpedancepinandmustbebiased
externally with an external resistor network or reference
voltage.
1
2
3
8
7
6
5
+
+
–
+
–
+
0.1µF
IN
IN
V
V
OUT
OUT
V
OUT
OUT
1
2
3
8
7
6
5
+
+
–
+
–
+
IN
IN
V
V
LTC1566-1
OUT
+
+
OUT
OUT
V
IN
–
–
LTC1566-1
–
+
+
100k
0.1µF
V
IN
–
OUT
–
+
V
IN
–
–
+
100k
GND
5V
V
IN
–
GND
5V
V
0.1µF
0.1µF
10k
10k
4
–
0.1µF
0.1µF
10k
V
10k
V
ODC
4
–
V
V
ODC
1566-1 F01
DC COUPLED INPUT
1566-1 F02
+
–
V
+ V
IN
AC COUPLED INPUT
IN
+
V
V
(COMMON MODE) =
IN
V
2
V
(COMMON MODE) = V
(COMMON MODE) =
OUT
IN
+
–
+
2
V
+ V
V
=
OUT
OUT
(COMMON MODE) =
OUT
2
2
Figure 2
Figure 1
sn15661 1566-1fs
5
LTC1566-1
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W U U
APPLICATIO S I FOR ATIO
acommonmodevoltagethatisequaltoone-halfofthetotal
supply voltage. Figure 5 illustrates the THD versus output
common mode voltage for a 0.5VP-P/2.0VP-P differential
input/output voltage and a common mode input voltage
that is equal to one-half the total supply voltage.
Input Common Mode and Differential Voltage Range
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
voltages. Figure 3 shows the total harmonic distortion of
the filter versus input common mode voltage with a
2VP-P differential output signal.
Output DC Offset Control
AuniquefeatureoftheLTC1566-1istheabilitytointroduce
a differential offset voltage at the output of the filter. As
seeninthe“BlockDiagram”,ifaDCvoltageisappliedtoPin
5 with respect to Pin 3, the same voltage will be added to
the differential voltage seen between Pins 8 and 7.
Figure 4 shows the total harmonic distortion and signal to
noise ratio versus differential output voltage level for both
a single 5V and a ±5V supply. The common mode voltage
oftheinputsignalisone-halfthetotalpowersupplyvoltage
of the filter. The spurious free dynamic range (SFDR), the
level where the THD and S/N ratio are equal, is 72dB.
The output DC offset control pin can be used for sideband
suppression in differential modulators, calibration of A/D
converters, or simple signal summation. Since the voltage
summing occurs at the output of the filter, Pin 5 acts as a
unfiltered input. The response from Pin 5 to Pin 8 – Pin 7
with Pins 1,2 and 3 grounded is shown in Figure 7. The
range of voltages that can be applied to Pin 5 is shown in
Figure 6 where THD is plotted versus output offset. Pin 3 is
biased to mid supply.
Forbestperformance, theinputsshouldbedrivendifferen-
tially. For single-ended signals, connect the unused input
to Pin 3 or a common mode reference.
The filter DC differential swings listed in the “Electrical
Characteristics” are measured with input differential volt-
ages of 0.9VP-P and 1.5VP-P for 5V and ±5V supplies
respectively.Ideallythecorrespondingoutputlevelswould
be 3.6VP-P and 6VP-P. As seen in Figure 4, these levels are
above the range of linear operation. Input signals larger
than 0.9VP-P/1.5VP-P will result in phase inversion and
should be avoided.
Output Drive
Pins 7 and 8 can drive a 1kΩ or 300pF load connected to
AC ground with a ±0.5V signal (corresponding to a 2VP-P
differential signal). For differential loads (loads connected
across Pins 7 and 8) the outputs can produce a 2VP-P
differential signal across 2kΩ or 150pF. For smaller signal
amplitudes the outputs can drive correspondingly larger
loads.
Output Common Mode and Differential Voltage Range
The output is a fully differential signal with a common
mode level equal to the voltage at Pin 3 when Pin 5 is
shorted to Pin 3. The best performance is achieved using
–30
–30
–30
V
V
= 5V
V
V
= 5V
S
S
V
V
= 5V
S
S
S
S
= ±5V
= ±5V
= ±5V
–40
–50
–60
–70
–80
–90
–40
–50
–60
–70
–80
–90
S/N
–40
–50
–60
–70
–80
–90
0.5 1.0
1.5 2.0 2.5 3.0
3.5 4.0
–4 –3 –2 –1
0
1
2
3
4
–5 –4 –3 –2 –1
0
1
2
3
4
5
DIFFERENTIAL OUTPUT (V
)
OUTPUT COMMON MODE VOLTAGE (V)
P-P
INPUT COMMON MODE VOLTAGE (V)
1566-1 F04
1566-1 F05
1566-1 F03
Figure 4
Figure 5
Figure 3
sn15661 1566-1fs
6
LTC1566-1
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W U U
APPLICATIO S I FOR ATIO
–30
Noise
V
S
V
S
= 5V
= ±5V
–40
–50
–60
–70
–80
–90
The wideband noise of the filter is the RMS value of the
output noise power spectral density integrated over a
given bandwidth. Since the filter has a DC gain of 4, the
wideband noise is divided by 4 when referred to the input.
Theinputreferredwidebandnoiseisusedtodeterminethe
signal-to-noise ratio at a given distortion level and hence
the spurious free dynamic range. Most of the noise is
concentratedinthefilterpassbandandcannotberemoved
with post filtering (Table 1). The noise is mostly indepen-
dent of supply level (Table 2).
4
–3
–2
–1
0
1
2
3
PIN 5 DC VOLTAGE (V)
1566-1 F06
Figure 6
2.5
Table 1. Input Referred Wideband Noise vs Bandwidth,
Single 5V Supply
V
= 200mV
P-P
IN
BANDWIDTH
50kHz to 2MHz
50kHz to 4MHz
TOTAL INTEGRATED NOISE
62µV
76µV
RMS
RMS
0
Table 2. Input Referred Wideband Noise vs Supply Voltage,
50kHz to 2MHz
V
V
= 5V
= ±5V
S
S
BANDWIDTH
TOTAL INTEGRATED NOISE
–2.5
V = 5V
62µV
63µV
S
RMS
RMS
10k
100k
FREQUENCY (Hz)
1M
10M
V = ±5V
S
1566-1 F07
Figure 7
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PACKAGE DESCRIPTIO
Dimensions in inches (millimeters) unless otherwise noted.
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
0.010 – 0.020
(0.254 – 0.508)
7
5
8
6
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.008 – 0.010
(0.203 – 0.254)
0°– 8° TYP
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
SO8 1298
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
3
4
2
sn15661 1566-1fs
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 represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
7
LTC1566-1
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TYPICAL APPLICATIO S
A Fixture for Evaluation with Single-Ended, Ground Referenced Test Equipment
15V
MINICIRCUITS
SPLITTER
ZSCJ-2-2
5k
5k
1
2
3
4
8
7
6
5
+
+
–
+
0°
+
–
IN
IN
OUT
OUT
V
5k
50Ω
50Ω
LTC1566-1
V
IN
V
OUT
LT1363
Σ°
–
π°
GND
2.5V
S1
CLOSE SWITCH S1
AND APPLY A VOLTAGE
TO ALTER THE OUTPUT
COMMON MODE.
–15V
5k
10k
0.1µF
–
V
V
0.1µF
–2.5V
ODC
10k
1k
CLOSE SWITCH S2
AND APPLY A VOLTAGE
TO ADD A DC OFFSET.
0.1µF
S2
CHANGE THE POWER SUPPLY VOLTAGES TO ALTER THE INPUT COMMON MODE VOLTAGE.
FOR EXAMPLE, V = 3, –2 MAKES THE EFFECTIVE INPUT COMMON MODE –0.5V BELOW MID SUPPLY.
1566-1 TA01a
S
Simple Pulse Shaping Circuit for Single 5V Operation, 5Mbps 2 Level Data
1
2
3
4
8
7
6
5
+
+
–
+
+
IN
IN
OUT
OUT
V
5V
5V
LTC1566-1
V
OUT
–
2k
2k
10k
10k
–
15k
300mV/
DIV
5Mbps
DATA
0
GND
5V
0.1µF
0.1µF
–
V
V
ODC
1566-1 TA02a
1566-1 TA02b
50ns/DIV
Wideband CDMA Base Station Receiver Block Diagram
LTC1566-1
LPF
ADC
0°
I
RF/IF
SECTION
0°/90°
LO
DSP
Q
90°
LTC1566-1
LPF
ADC
1566-1 TA03
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1560-1
1MHz/500kHz Continuous Time, Lowpass Elliptic Filter
Universal 8th Order Active RC Filters
f
= 500kHz or 1MHz
CUTTOFF
LTC1562/LTC1562-2
f
f
= 150kHz (LTC1562),
CUTOFF(MAX)
CUTOFF(MAX)
= 300kHz (LTC1562-2)
LTC1563-2/LTC1563-3 4th Order Active RC Lowpass Filters
f
= 256kHz
CUTOFF(MAX)
LTC1565-31
650kHz Continuous Time, Linear Phase Lowpass Filter
7th Order, Differential Inputs and Outputs
LTC1569-6/LTC1569-7 Self Clocked, 10th Order Linear Phase Lowpass Filters
f
f
/f
= 64/1, f
= 32/1, f
= 75kHz (LTC1569-6),
= 300kHz (LTC1569-7)
CLK CUTOFF
CUTOFF(MAX)
CUTOFF(MAX)
/f
CLK CUTOFF
sn15661 1566-1fs
LT/TP 0101 4K • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
8
●
●
LINEAR TECHNOLOGY CORPORATION 2001
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com
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