LTC1069-7I [Linear]
Linear Phase 8th Order Lowpass Filter; 线性相位8阶低通滤波器
| 型号： | LTC1069-7I |
| 厂家： | 
Linear |
| 描述： | Linear Phase 8th Order Lowpass Filter |
| 文件： | 总8页 (文件大小：230K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1069-7
Linear Phase
8th Order Lowpass Filter
cutoff frequency of the LTC1069-7 is set by an external
clock and is equal to the clock frequency divided by 25.
The ratio of the internal sampling frequency to the cutoff
frequencyis50:1thatis,theinputsignalissampledtwice
perclockcycletolowertheriskofaliasing.TheLTC1069-
7 can be operated from a single 5V supply up to dual±5V
supplies.
FEATURES
■
8th Order, Linear Phase Filter in SO-8 Package
■
Raised Cosine Amplitude Response
■
–43dB Attenuation at 2× fCUTOFF
■
Wideband Noise: 140µVRMS
■
Operates from Single 5V Supply to
±5V Power Supplies
The gain and phase response of the LTC1069-7 can be
usedindigitalcommunicationsystemswherepulseshap-
ing and channel bandwidth limiting must be carried out.
Any system that requires an analog filter with linear phase
and sharper roll off than conventional Bessel filters can
use the LTC1069-7.
■
Clock-Tunable to 200kHz with ±5V Supplies
Clock-Tunable to 120kHz with Single 5V Supply
■
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APPLICATIONS
■
Digital Communication Filter
Antialiasing Filter with Linear Phase
Smoothing Filters
■
The LTC1069-7 has a wide dynamic range. With ±5V
supplies and an input range of 0.1VRMS to 2VRMS, the
signal-to-(noise + THD) ratio is ≥ 60dB. The wideband
noise of the LTC1069-7 is 140µVRMS. Unlike other
LTC1069-X filters, the typical passband gain of the
LTC1069-7 is equal to –1V/V.
■
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DESCRIPTION
The LTC®1069-7 is a monolithic, clock-tunable, linear
phase, 8th order lowpass filter. The amplitude response
of the filter approximates a raised cosine filter with an
alphaofone. Thegainatthecutofffrequencyis–3dBand
the attenuation at twice the cutoff frequency is 43dB. The
The LTC1069-7 is available in an SO-8 package.
Other filter responses with lower power/speed specifica-
tions can be obtained. Please contact LTC Marketing.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATION
Frequency Response
10
Single 5V Supply, Linear Phase 100kHz Lowpass Filter
0
–10
–20
–30
–40
–50
–60
–70
AGND
V
OUT
V
OUT
5V
+
–
0.47µF
V
V
0.1µF
LTC1069-7
NC
NC
f
= 2.5MHz
1069-7 TA01
V
IN
V
IN
CLK
CLK
10
100
1000
FREQUENCY (kHz)
1069-7 TA02
1
LTC1069-7
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ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
Total Supply Voltage (V+ to V–) ............................. 12V
Power Dissipation............................................. 400mW
Operating Temperature Range
ORDER PART
TOP VIEW
NUMBER
AGND
1
2
3
4
8
7
6
5
V
V
OUT
–
LTC1069-7CS8
LTC1069-7IS8
LTC1069-7C ........................................... 0°C to 70°C
LTC1069-7I ....................................... –40°C to 85°C
Storage Temperature ............................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
+
V
NC
NC
V
CLK
IN
S8 PART MARKING
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 110°C/ W
10697
10697I
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/25. The fCLK signal level is TTL or CMOS (max clock rise or
fall time ≤1µs), RL = 10k, TA = 25°C, unless otherwise specified. All AC gains are measured relative to the passband gain.
PARAMETER
Passband Gain (f ≤ 0.2f
CONDITIONS
V = ±5V, f = 2.5MHz
CLK
MIN
TYP
MAX
UNITS
)
–0.10 ±0.75
±0.90
dB
dB
IN
CUTOFF
S
f
= 1kHz, V = 1V
●
●
●
●
●
●
●
●
●
●
●
●
●
●
TEST
IN
RMS
V = 4.75V, f
S
= 500kHz
CLK
–0.10 ±0.75
±0.90
dB
dB
f
= 1kHz, V = 0.5V
TEST
IN RMS
Gain at 0.25f
Gain at 0.50f
Gain at 0.75f
V = ±5V, f = 2.5MHz
CLK
–0.30
–0.1
dB
dB
CUTOFF
CUTOFF
CUTOFF
S
f
= 25kHz, V = 1V
–0.55
–0.30
–1.40
–0.60
–2.1
–1.15
–4.0
–3.3
–19
TEST
IN
RMS
V = 4.75V, f
S
= 500kHz
CLK
–0.05
0.15
dB
dB
f
= 5kHz, V = 0.5V
TEST
IN RMS
V = ±5V, f
= 2.5MHz
–1.0
dB
dB
S
CLK
f
= 50kHz, V = 1V
–0.35
TEST
IN
RMS
V = 4.75V, f
S
= 500kHz
CLK
–0.30
0
dB
dB
f
= 10kHz, V = 0.5V
TEST
IN RMS
V = ±5V, f
= 2.5MHz
–1.65
–0.80
dB
dB
S
CLK
f
= 75kHz, V = 1V
TEST
IN RMS
V = 4.75V, f
S
= 500kHz
CLK
–0.75
–0.25
dB
dB
f
= 15kHz, V = 0.5V
TEST
IN
RMS
Gain at f
V = ±5V, f = 2.5MHz
CLK
–3.5
–2.7
dB
dB
CUTOFF
S
f
= 100kHz, V = 1V
TEST
IN
RMS
V = 4.75V, f
S
= 500kHz
CLK
–2.9
–2.4
dB
dB
f
= 20kHz, V = 0.5V
TEST
IN
RMS
Gain at 1.5f
V = ±5V, f = 2.5MHz
CLK
–16.5
–14
dB
dB
CUTOFF
CUTOFF
S
f
= 150kHz, V = 1V
TEST
IN
RMS
V = 4.75V, f
S
= 500kHz
CLK
–18.1
–17
dB
dB
f
= 30kHz, V = 0.5V
–20
TEST
IN
RMS
Gain at 2.0f
V = ±5V, f
= 2.5MHz
–43
–38
dB
dB
S
CLK
f
= 200kHz, V = 1V
–55
TEST
IN
RMS
V = 4.75V, f
S
= 500kHz
CLK
–41
–39
dB
dB
f
= 40kHz, V = 0.5V
–48
TEST
IN
RMS
2
LTC1069-7
ELECTRICAL CHARACTERISTICS
fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/25. The fCLK signal level is TTL or CMOS (max clock rise or
fall time ≤1µs), RL = 10k, TA = 25°C, unless otherwise specified. All AC gains are measured relative to the passband gain.
PARAMETER
Gain at 5.0f
CONDITIONS
V = 4.75V, f = 500kHz
CLK
MIN
TYP
MAX
UNITS
–70
–59
–55
dB
CUTOFF
S
f
= 100kHz, V = 0.5V
TEST
IN RMS
Gain at f
(160kHz)
V = ±5V, f = 4MHz
CLK
–2.1
dB
Deg
Deg
Deg
CUTOFF
S
f
= 160kHz, V = 1V
TEST
IN RMS
Phase at 0.5f
V = ±5V, f
= 2.5MHz
= 2.5MHz
= 500kHz
= 500kHz
–35 –30.5
–25
CUTOFF
S
CLK
CLK
f
= 50kHz
TEST
Phase at f
V = ±5V, f
–240 –235 –230
CUTOFF
S
f
= 100kHz
TEST
Passband Phase Deviation from
Linear Phase (Note 1)
V = ±5V, f
–3.0
50
S
CLK
Output DC Offset (Input at GND)
V = ±5V, f
mV
mV
S
CLK
V = 4.75V, f
S
= 400kHz
25
125
CLK
Output Voltage Swing
V = ±5V, I
V = 4.75V, I
S
/I
≤ 1mA, R = 10k
●
●
±3.5
2.6
±4.0
3.6
V
P-P
S
SOURCE SINK
L
/I
≤ 1mA, R = 10k
V
SOURCE SINK
L
Power Supply Current
V = ±5V, f
= 500kHz
18
26
29
mA
mA
S
CLK
●
●
V = 4.75V, f
S
= 400kHz
CLK
13
15
16.5
mA
mA
Example: An LTC1069-7 has Phase at 0.5f
= –30.5° and Phase at
The
temperature range.
Note 1: Phase Deviation = 1/2(Phase at 0Hz – Phase at f
● denotes specifications which apply over the full operating
CUTOFF
f
= –235°.
CUTOFF
Passband Phase Deviation from Linear Phase
= 1/2[180° – (–235°)] – [(180° – (–30.5°)] = –3°
) – (Phase
CUTOFF
at 0Hz – Phase at 0.5f
)
CUTOFF
Phase at 0Hz = 180° (guaranteed by design)
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TYPICAL PERFORMANCE CHARACTERISTICS
Passband Gain vs Frequency
Transition Band Gain vs Frequency
Stopband Gain vs Frequency
10
0
–40
–42
–44
–46
–48
–50
–52
–54
–56
–58
–60
1.0
0.5
V
f
C
V
= ±5V
V
f
= ±5V
V
f
= ±5V
S
S
S
= 500kHz
= 500kHz
= 500kHz
CLK
CLK
CLK
f
= 20kHz
f
= 20kHz
f
= 20kHz
C
C
0
= 2V
V
= 2V
V
= 2V
IN
RMS
IN
RMS
IN
RMS
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–10
–20
–30
–40
–50
21 23 25 27 29 31 33 35 37 39 41
FREQUENCY (kHz)
41 45 49 53 57 61 65 69 73 77 81
FREQUENCY (kHz)
1
3
5
7
9
11 13 15 17 19 21
FREQUENCY (kHz)
LTC1069-7 • TPC03
LTC1069-7 • TPC01
LTC1069-7 • TPC02
3
LTC1069-7
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TYPICAL PERFORMANCE CHARACTERISTICS
Passband Gain vs
Clock Frequency
Gain vs Frequency
Passband Gain vs Frequency
3
0
1.0
0.5
10
0
V
f
= ±5V
V
f
= ±5V
CLK
S
S
= 250kHz
= 4MHz
CLK
f
= 5MHz
CLK
f
= 10kHz
f
= 160kHz
= 2V
C
C
0
V
= 1V
V
IN
RMS
IN
RMS
–10
–20
–30
–40
–50
–60
–3
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
T
= 85°C
A
–6
f
= 2.5MHz
CLK
f
= 4.5MHz
CLK
T
= –40°C
A
–9
f
f
= 4MHz
CLK
T
= 25°C
= 3.5MHz
A
CLK
–12
–15
–18
f
= 3MHz
CLK
V
V
= ±5V
S
IN
= 2V
RMS
1
10
100
10
40
70
100
130
160
20 40 60 80
140 160 180 200
100 120
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
LTC1069-7 • TPC04
LTC1069-7 • TPC06
LTC1069-7 • TPC05
Passband Gain vs
Clock Frequency
Gain vs Supply Voltage
Passband Gain vs Frequency
1.0
0.5
3
0
10
0
f
f
= 2MHz
V
V
= 5V
IN
CLK
S
= 80kHz
= 1V
C
RMS
V
= 0.5V
0
IN
RMS
T
A
= 85°C
–3
–10
–20
–30
–40
–50
–60
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
f
= 3MHz
CLK
–6
T
A
= –40°C
–9
T
= 25°C
A
f
= 2.5MHz
CLK
–12
–15
–18
V
= 5V
V
= 5V
S
S
f
f
= 2.5MHz
CLK
= 100kHz
f
= 2MHz
CLK
V
= ±5V
S
C
V
= 1V
IN
RMS
f
= 1.5MHz
CLK
10 20 30 40 50 60 70 80 90 100
FREQUENCY (kHz)
20 40 60 80
140 160 180 200
10
70
110 130 150 170 190 210
100 120
30 50
90
FREQUENCY (kHz)
FREQUENCY (kHz)
LTC1069-7 • TPC09
LTC1069-7 • TPC08
LTC1069-7 • TPC07
Passband Gain and Phase vs
Frequency
Passband Gain and Delay vs
Frequency
2
1
13.5
13.0
12.5
12.0
11.5
11.0
2
1
180
135
90
V
f
C
= ±5V
CLK
= 100kHz
V
f
C
= ±5V
CLK
= 100kHz
S
S
= 2.5MHz
= 2.5MHz
f
f
0
0
–1
–2
–3
–4
–5
–6
–7
–8
–1
–2
–3
–4
–5
–6
–7
–8
45
GAIN
0
GAIN
–45
–90
–135
–180
–225
–270
PHASE
DELAY
0
10 20 30 40 50 60 70 80 90 100
FREQUENCY (kHz)
0
10 20 30 40 50 60 70 80 90 100
FREQUENCY (kHz)
LTC1069-7 • TPC12
LTC1069-7 • TPC10
4
LTC1069-7
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TYPICAL PERFORMANCE CHARACTERISTICS
Phase Matching vs Frequency
THD + Noise vs Input (VP-P
)
THD + Noise vs Frequency
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
–40
–45
–50
–55
–60
–65
–70
–75
–40
–45
–50
–55
–60
–65
–70
–75
–80
f
f
f
= 1MHz
f
f
= 2.5MHz
CLK
C
IN
CLK
C
70°C
= 40kHz
= 100kHz
= 1kHz
25°C
V
= 5V
S
V
V
= 5V, V = 1V
IN P-P
S
S
V
CLK
= ±5V
S
f
≤ 2.5MHz
PHASE DIFFERENCE BETWEEN
ANY TWO UNITS (SAMPLE OF
20 REPRESENTATIVE UNITS)
V
= ±5V
S
= ±5V, V = 2V
IN
P-P
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0.1
1
10
1
10
100
INPUT (V
)
FREQUENCY (f
CUTOFF
/FREQUENCY)
FREQUENCY (kHz)
P-P
LTC1609-7 • TPC13
LTC1069-7 • TPC11
LTC1069-7 • TPC14
Output Voltage Swing vs
Temperature
Transient Response
Output Offset vs Clock Frequency
–10
–15
–20
–25
–30
–35
–40
–45
–50
4.3
4.2
4.1
1.2
1.1
1.0
V
S
= 5V
V
= 5V (AGND AT 2.5V)
S
f
f
R
I
= 500kHz
CLK
CUTOFF
= 20kHz
= 10k
L
/I
≤ 1mA
V
S
= ±5V
SOURCE SINK
VS = ±5V
0.1ms/DIV
LTC1069-7 • TPC15
fCLK = 500kHz
fCUTOFF = 20kHz
VIN = 4VP-P SQUARE WAVE AT 1kHz
0.25
1.25
2.25
3.25
4.25
5.25
–40
0
20
40
60
80 100
–20
CLOCK FREQUENCY (MHz)
TEMPERATURE (°C)
LTC1069-7 • TPC16
LTC1069-7 • TPC17
Output Voltage Swing vs
Temperature
Supply Current vs
Supply Voltage
Supply Current vs
Clock Frequency
4.2
4.1
22
21
20
19
18
17
16
15
14
13
12
11
10
f
= 10Hz
CLK
25
20
15
10
5
85°C
25°C
V
= ±5V
S
V
= ±5V
S
4.0
–40°C
f
f
= 2.5MHz
CLK
CUTOFF
= 10k
= 100kHz
R
L
–4.5
–4.6
–4.7
I
/I
SOURCE SINK
= 1mA
V
= 5V
S
0
–40
0
20
40
60
80 100
0
1
2
3
4
5
6
–20
0.25
1.25
2.25
3.25
4.25
5.25
SUPPLY VOLTAGE (±V)
TEMPERATURE (°C)
CLOCK FREQUENCY (MHz)
LTC1069-7 • TPC18
LTC1069-7 • TPC19
LTC1263 • TPC20
5
LTC1069-7
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PIN FUNCTIONS
AGND (Pin 1): Analog Ground. The quality of the analog
signal ground can affect the filter performance. For either
single or dual supply operation, an analog ground plane
surrounding the package is recommended. The analog
ground plane should be connected to any digital ground at
a single point. For dual supply operation, Pin 1 should be
connected to the analog ground plane.
a 36k resistor for each op amp. This parallel combination
creates an 18k input impedance.
CLK (Pin 5): Clock Input. Any TTL or CMOS clock source
with a square wave output and 50% duty cycle (±10%) is
anadequateclocksourceforthedevice. Thepowersupply
for the clock source should not necessarily be the filter’s
power supply. The analog ground of the filter should only
be connected to the clock’s ground at a single point. Table
1 shows the clock’s low and high level threshold value for
adualorsinglesupplyoperation. Apulsegeneratorcanbe
used as a clock source provided the high level on-time is
greater than 0.42µs (VS = ±5V). Sine waves less than
100kHz are not recommended for clock sources because
excessive slow clock rise or fall times generate internal
clockjitter. Themaximumclockriseorfalltimeis1µs. The
clock signal should be routed from the right side of the IC
package to avoid coupling into any input or output analog
signal path.A1kresistorbetweentheclocksourceandthe
clock input (Pin 5) will slow down the rise and fall times of
the clock to further reduce charge coupling, Figure 1.
For single supply operation, Pin 1 should be bypassed to
the analog ground plane with a capacitor 0.47µF or larger.
An internal resistive divider biases Pin 1 to half the total
power supply. Pin 1 should be buffered if used to bias
other ICs. Figure 1 shows the connections for single
supply operation.
V+, V– (Pins 2, 7): Power Supplies. The V+ (Pin 2) and V–
(Pin 7) should be bypassed with a 0.1µF capacitor to an
adequateanalogground.Thefilter’spowersuppliesshould
be isolated from other digital or high voltage analog
supplies. A low noise linear supply is recommended.
Using switching power supplies will lower the signal-to-
noise ratio of the filter. Unlike previous monolithic filters,
the power supplies can be applied in any order, that is, the
positive supply can be applied before the negative supply
and vice versa. Figure 2 shows the connections for dual
supply operation.
Table 1. Clock Source High and Low Thresholds
POWER SUPPLY
HIGH LEVEL
1.5V
LOW LEVEL
0.5V
Dual Supply = ±5V
Single Supply = 10V
Single Supply = 5V
6.5V
5.5V
1.5V
0.5V
NC(Pins3,6):NoConnection.Pins3and6arenotconnected
to any internal circuitry; they should be tied to ground.
VOUT (Pin 8): Filter Output. Pin 8 is the output of the filter,
and it can source 23mA or sink 16mA. The total harmonic
distortionofthefilterwilldegradewhendrivingcoaxialcables
or loads less than 20k without an output buffer.
VIN (Pin 4): Filter Input. The filter input pin is internally
connected to the inverting inputs of two op amps through
ANALOG GROUND
PLANE
ANALOG GROUND
PLANE
1
2
3
4
8
7
6
5
AGND
V
OUT
V
OUT
1
2
3
4
8
7
6
5
AGND
V
V
OUT
OUT
+
–
+
–
V
V
V
V
0.47µF
+
+
–
V
LTC1069-7
0.1µF
0.1µF
V
V
NC
LTC1069-7
NC
0.1µF
NC
NC
V
CLK
V
IN
IN
V
CLK
IN
V
IN
DIGITAL
GROUND
PLANE
DIGITAL
GROUND
PLANE
STAR
SYSTEM
GROUND
STAR
SYSTEM
GROUND
1k
1k
CLOCK
SOURCE
CLOCK
SOURCE
LTC1069-7 • F01
LTC1069 F02
Figure 2. Connections for Dual Supply Operation
Figure 1. Connections for Single Supply Operation
6
LTC1069-7
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APPLICATIONS INFORMATION
the clock frequency and depends slightly on the power
supplyvoltage(seeTable3). Theclockfeedthroughspeci-
fications are not part of the wideband noise.
Temperature Behavior
The power supply current of the LTC1069-7 has a positive
temperature coefficient. The GBW product of its internal
op amps is nearly constant and the speed of the device
does not degrade at high temperatures.
Table 3. Wideband Noise
V
WIDEBAND NOISE
S
4.75V
125µV
140µV
RMS
RMS
Clock Feedthrough
± 5V
The clock feedthrough is defined as the RMS value of the
clock frequency and its harmonics that are present at the
filter’s output (Pin 8). The clock feedthrough is tested with
the input (Pin 4) shorted to the AGND pin and depends on
PC board layout and on the value of the power supplies.
With proper layout techniques the values of the clock
feedthrough are shown on Table 2.
Aliasing
Aliasing is an inherent phenomenon of sampled data
systems and it occurs for input frequencies approaching
the sampling frequency. The internal sampling frequency
of the LTC1069-7 is 50 times its fCUTOFF frequency. For
instance if a 48kHz, 100mVRMS signal is applied at the
input of an LTC1069-7 operating with a 50% duty cycle
25kHz clock, a 2kHz, 741µVRMS alias signal will appear at
the filter output. Table 4 shows details.
Table 2. Clock Feedthrough
V
CLOCK FEEDTHROUGH
S
5V
400µV
850µV
RMS
RMS
Table 4. Aliasing
±5V
INPUT FREQUENCY
= 1V
OUTPUT LEVEL
Relative to Input
OUTPUT FREQUENCY
Aliased Frequency
Any parasitic switching transients during the rising and
fallingedgesoftheincomingclockarenotpartoftheclock
feedthroughspecifications. Switchingtransientshavefre-
quency contents much higher than the applied clock; their
amplitude strongly depends on scope probing techniques
as well as grounding and power supply bypassing. The
clock feedthrough can be reduced by adding a single RC
lowpass filter at the output (Pin 8) of the LTC1069-7.
V
IN
RMS
f
/f = 25:1, f
C
= 1kHz
CUTOFF
CLK
40kHz (or 60kHz)
47kHz (or 53kHz)
48kHz (or 52kHz)
–59.9dB
–54.2dB
–42.6dB
–18.3dB
–2.9dB
10kHz
3kHz
2kHz
48.5kHz (or 51.5kHz)
49kHz (or 52kHz)
1.5kHz
1.0kHz
0.5kHz
49.5kHz (or 50.5kHz)
–0.65dB
Wideband Noise
Speed Limitations
The wideband noise of the filter is the total RMS value of
the device’s noise spectral density and determines the
operating signal-to-noise ratio. Most of the wideband
noise frequency contents lie within the filter passband.
The wideband noise cannot be reduced by adding post
filtering. Thetotalwidebandnoiseisnearlyindependentof
To avoid op amp slew rate limiting, the signal amplitude
should be kept below a specified level as shown in Table 5.
Table 5. Maximum VIN vs VS and Clock
V
MAXIMUM CLOCK
≥ 2.5MHz
MAXIMUM V
IN
S
5V
340mV
(f ≥ 200kHz)
RMS IN
±5V
≥ 4.5MHz
1.2V (f ≥ 400kHz)
RMS IN
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
LTC1069-7
TYPICAL APPLICATION
U
Clock Tunable, Noninverting, Linear Phase 8th Order Filter to 200kHz fCUTOFF
51pF
10k
5V
0.1µF
0.1µF
1µF
10k
–
+
AGND
V
OUT
5V
–5V
LT®1354
V
OUT
+
–
V
V
0.1µF
0.1µF
LTC1069-7
NC
NC
–5V
V
IN
V
IN
CLK
f
≤ 5MHz
CLK
1069-7 TA03
U
PACKAGE DESCRIPTION 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)
7
5
8
6
0.010 – 0.020
(0.254 – 0.508)
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
0.008 – 0.010
(0.203 – 0.254)
0°– 8° TYP
0.016 – 0.050
0.406 – 1.270
0.050
(1.270)
TYP
0.014 – 0.019
(0.355 – 0.483)
1
3
4
2
SO8 0996
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
RELATED PARTS
PART NUMBER
LTC1064-3
LTC1064-7
LTC1164-7
LTC1264-7
DESCRIPTION
COMMENTS
Linear Phase, Bessel 8th Order Filter
Linear Phase, 8th Order Lowpass Filter
Low Power, Linear Phase Lowpass Filter
Linear Phase 8th Order Lowpass Filter
f
f
f
f
/f = 75/1 or 150/1, Very Low Noise
C
CLK
CLK
CLK
CLK
/f = 50/1 or 100/1, f
C
= 100kHz
C(MAX)
/f = 50/1 or 100/1, I = 2.5mA, V = 5V
C
S
S
/f = 25/1 or 50/1, f
C
= 200kHz
C(MAX)
10697f LT/TP 0697 7K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1996
Linear Technology Corporation
●
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900
8
●
●
FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com
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