LTC1069-6CS8#TR [Linear]
LTC1069-6 - Single Supply, Very Low Power, Elliptic Lowpass Filter; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C;
| 型号： | LTC1069-6CS8#TR |
| 厂家： | 
Linear |
| 描述： | LTC1069-6 - Single Supply, Very Low Power, Elliptic 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10页 (文件大小：132K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1069-1
Low Power, 8th Order
Progressive Elliptic,
Lowpass Filter
FEATURES
DESCRIPTION
The LTC®1069-1 is a monolithic 8th order lowpass filter
featuringclock-tunablecutofffrequencyand2.5mApower
supplycurrentwithasingle5Vsupply.Anadditionalfeature
of the LTC1069-1 is operation with a single 3.3V supply.
n
8th Order Elliptic Filter in SO-8 Package
n
Operates from Single 3.3V to 5V Power Supplies
n
–20dB at 1.2f
CUTOFF
–52dB at 1.4f
n
CUTOFF
n
–70dB at 2f
CUTOFF
The cutoff frequency (f
) of the LTC1069-1 is equal
CUTOFF
n
n
n
n
n
Wide Dynamic Range
110μV Wideband Noise
3.8mA Supply Current with 5V Supplies
2.5mA Supply Current with Single 5V Supply
2mA Supply Current with Single 3.3V Supply
to the clock frequency divided by 100. The gain at f
CUTOFF
RMS
is –0.7dB and the typical passband ripple is 0.15dB up
to 0.9f . The stopband attenuation of the LTC1069-1
CUTOFF
features a progressive elliptic response reaching 20dB
attenuation at 1.2f , 52dB attenuation at 1.4f
CUTOFF
CUTOFF
and 70dB attenuation at 2f
.
CUTOFF
APPLICATIONS
With 5V supplies, the LTC1069-1 cutoff frequency can
be clock-tuned up to 12kHz; with a single 5V supply, the
maximum cutoff frequency is 8kHz.
n
Telecommunication Filters
Antialiasing Filters
n
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
The low power feature of the LTC1069-1 does not penal-
ize the device’s dynamic range. With 5V supplies and an
input range of 0.3V
to 2.5V
, the signal-to-(noise +
RMS
RMS
THD)ratiois≥70dB.ThewidebandnoiseoftheLTC1069-1
is 110μV
. Other filter responses with lower power or
RMS
higher speed can be obtained. Please contact LTC market-
ing for details.
The LTC1069-1 is available in 8-pin PDIP and 8-pin SO
packages.
TYPICAL APPLICATION
Frequency Response
10
0
–10
–20
–30
–40
–50
–60
–70
Single 3.3V Supply 3kHz Elliptic Lowpass Filter
+
AGND
V
V
OUT
OUT
0.47μF
3.3V
0.1μF
+
–
V
V
LTC1069-1
NC
NC
f
CLK
V
IN
V
CLK
IN
300kHz
1069-1 TA01
–80
1.5
3
6
7.5
4.5
FREQUENCY (kHz)
10691 TA02
10691fa
1
LTC1069-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
+
–
Total Supply Voltage (V to V ).................................12V
Maximum Voltage at
Operating Temperature Range
LTC1069C-1............................................. 0°C to 70°C
LTC1069I-1 ..........................................–40°C to 85°C
Storage Temperature Range...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
–
Any Pin .............................(V – 0.3V) ≤ V ≤ (V+ + 0.3V)
PIN CONFIGURATION
TOP VIEW
TOP VIEW
AGND
1
2
3
4
V
V
AGND
1
2
3
4
8
7
6
5
V
V
8
7
6
5
OUT
–
OUT
–
+
+
V
V
NC
NC
NC
NC
V
CLK
V
CLK
IN
IN
N8 PACKAGE
8-LEAD PLASTIC DIP
= 110°C, θ = 100°C/W
S8 PACKAGE
8-LEAD PLASTIC SO
= 125°C, θ = 130°C/W
T
T
JMAX
JA
JMAX
JA
ORDER INFORMATION
LEAD FREE FINISH
LTC1069-1CN8#PBF
LTC1069-1IN8#PBF
LTC1069-1CS8#PBF
LTC1069-1IS8#PBF
TAPE AND REEL
PART MARKING*
LTC1069-1
LTC1069-1
10691
PACKAGE DESCRIPTION
8-Lead Plastic DIP
8-Lead Plastic DIP
8-Lead Plastic SO
8-Lead Plastic SO
SPECIFIED TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
LTC1069-1CS8#TRPBF
LTC1069-1IS8#TRPBF
10691I
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/100. The
fCLK signal level is TTL or CMOS (clock rise or fall time ≤ 1μs), VS = 3.3V to 5V, RL = 10k, unless otherwise noted. All AC gains are
measured relative to the passband gain.
PARAMETER
CONDITIONS
V = 5V, f = 500kHz
CLK
MIN
TYP
MAX
UNITS
Passband Gain (f ≤ 0.25f
)
–0.30
–0.35
0.2
0.70
0.75
dB
dB
IN
CUTOFF
S
l
l
f
= 1.25kHz, V = 1V
IN RMS
TEST
V = 3.3V, f
TEST
= 200kHz
CLK
–0.30
–0.35
0.2
0.70
0.75
dB
dB
S
f
= 0.5kHz, V = 0.5V
IN RMS
10691fa
2
LTC1069-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/100. The
fCLK signal level is TTL or CMOS (clock rise or fall time ≤ 1μs), VS = 3.3V to 5V, RL = 10k, unless otherwise noted. All AC gains are
measured relative to the passband gain.
PARAMETER
CONDITIONS
V = 5V, f = 500kHz
CLK
MIN
TYP
MAX
UNITS
Gain at 0.50f
–0.10
–0.11
–0.03
0.10
0.11
dB
dB
CUTOFF
CUTOFF
CUTOFF
CUTOFF
S
l
l
l
l
l
l
l
l
l
l
l
l
l
l
f
= 2.5kHz, V = 1V
IN RMS
TEST
V = 3.3V, f
TEST
= 200kHz
CLK
–0.10
–0.11
–0.03
0.04
0.10
0.11
dB
dB
S
f
= 1kHz, V = 0.5V
IN RMS
Gain at 0.75f
Gain at 0.90f
Gain at 0.95f
V = 5V, f
TEST
= 500kHz
CLK
–0.20
–0.25
0.20
0.25
dB
dB
S
f
= 3.75kHz, V = 1V
IN RMS
V = 3.3V, f
TEST
= 200kHz
CLK
–0.20
–0.25
0.04
0.20
0.25
dB
dB
S
f
= 1.5kHz, V = 0.5V
IN RMS
V = 5V, f
TEST
= 500kHz
CLK
–0.20
–0.25
–0.01
–0.01
–0.05
–0.04
–0.70
–0.61
–27
0.20
0.25
dB
dB
S
f
= 4.5kHz, V = 1V
IN RMS
V = 3.3V, f
TEST
= 200kHz
CLK
–0.20
–0.25
0.20
0.25
dB
dB
S
f
= 1.8kHz, V = 0.5V
IN
RMS
RMS
V = 5V, f
TEST
= 500kHz
CLK
–0.30
–0.35
0.30
0.35
dB
dB
S
f
= 4.75kHz, V = 1V
IN
V = 3.3V, f
TEST
= 200kHz
CLK
–0.30
–0.35
0.30
0.35
dB
dB
S
f
= 1.9kHz, V = 0.5V
IN RMS
Gain at f
V = 5V, f = 500kHz
CLK
–1.25
–1.35
–0.25
–0.15
dB
dB
CUTOFF
S
TEST
f
= 5.0kHz, V = 1V
IN RMS
V = 3.3V, f
TEST
= 200kHz
CLK
–1.25
–1.35
–0.25
–0.15
dB
dB
S
f
= 2.0kHz, V = 0.5V
IN
RMS
RMS
Gain at 1.25f
V = 5V, f = 500kHz
CLK
–30
–31
–25
–24
dB
dB
CUTOFF
CUTOFF
S
TEST
f
= 6.25kHz, V = 1V
IN
V = 3.3V, f
TEST
= 200kHz
CLK
–30
–31
–27
–25
–24
dB
dB
S
f
= 2.5kHz, V = 0.5V
IN RMS
Gain at 1.50f
V = 5V, f
TEST
= 500kHz
CLK
–58
–59
–53
–50
–49
dB
dB
S
f
= 7.5kHz, V = 1V
IN RMS
V = 3.3V, f
TEST
= 200kHz
CLK
–58
–59
–53
–50
–49
dB
dB
S
f
= 3kHz, V = 0.5V
IN RMS
Output DC Offset (Input at AGND)
Output Voltage Swing
V = 5V, f
= 500kHz
CLK
30
20
15
150
mV
mV
mV
S
V = 4.75V, f
= 400kHz
S
CLK
V = 3.3V, f
= 200kHz
100
S
CLK
l
l
l
V = 5V
–3.25
–1.50
–0.70
4.0
1.7
0.9
3.25
1.25
0.60
V
V
V
S
V = 4.75V
S
V = 3.3V
S
l
l
l
Power Supply Current
V = 5V, f
= 500kHz
3.8
2.5
2.0
5.5
4.5
3.5
mA
mA
mA
S
CLK
V = 4.75V, f
= 400kHz
CLK
S
V = 3.3V, f
= 200kHz
CLK
S
Maximum Clock Frequency
V = 5V
1.2
0.8
0.5
MHz
MHz
MHz
S
V = 4.75V
S
V = 3.3V
S
Input Frequency Range
Input Resistance
0
f
/2
MHz
kΩ
V
CLK
30
43
70
Operating Power Supply Voltage
1.57
5.5
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.
10691fa
3
LTC1069-1
TYPICAL PERFORMANCE CHARACTERISTICS
Transition Band Gain vs
Passband Gain vs Frequency
Frequency
Stopband Gain vs Frequency
1.0
0.8
10
0
–70
–72
–74
–76
–78
–80
–82
–84
–86
–88
–90
V
f
C
V
=
CLK
5V
V
f
C
V
=
CLK
5V
S
S
V
=
5V
S
= 500kHz
= 500kHz
f
f
= 500kHz
CLK
C
f
= 5kHz
f
= 5kHz
= 5kHz
= 2V
0.6
–10
–20
–30
–40
–50
–60
–70
–80
–90
= 2V
= 2V
IN
RMS
IN
RMS
V
IN
RMS
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
5
6
7
8
9
10
11
11 12 13 14 15 16 17 18 19 20 21
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
10691 G02
10691 G03
10691 G01
Passband Gain vs Clock
Passband Gain vs Clock
Frequency, VS = Single 5V
Passband Gain vs Clock
Frequency, VS = 5V
Frequency, VS = Single 3.3V
2.0
1.5
2.0
1.5
2.0
1.5
V
V
= SINGLE 3.3V
V
V
= SINGLE 5V
V
V
=
IN
5V
RMS
S
S
S
= 0.5V
= 1.2V
= 2V
IN
RMS
IN
RMS
1.0
1.0
1.0
f
= 1.5MHz
= 15kHz
f
= 1MHz
f
= 750kHz
CLK
C
f
= 750kHz
= 7.5kHz
CLK
C
CLK
C
CLK
C
f
f
= 10kHz
f
= 7.5kHz
f
0.5
0.5
0.5
0
0
0
f
= 1MHz
f
C
= 500kHz
CLK
C
CLK
f
= 10kHz
f
= 5kHz
–0.5
–1.0
–1.5
–2.0
–0.5
–1.0
–1.5
–2.0
–0.5
–1.0
–1.5
–2.0
f
= 500kHz
C
CLK
f
= 500kHz
C
CLK
f
= 5kHz
f
= 5kHz
1.5
2.5 3.5 4.5 5.5
FREQUENCY (kHz)
7.5
1.5 2.5 3.5 4.5 5.5
7.5 8.5 9.5 10.5
3
5
7
9
11
15
0.5
6.5
0.5
6.5
1
13
FREQUENCY (kHz)
FREQUENCY (kHz)
10691 G04
10691 G05
10691 G06
Phase and Group Delay vs
Frequency
Gain vs Supply Voltage
Transient Response
10
0
0
–90
f
= 500kHz
V
f
C
= SINGLE 5V
CLK
= 5kHz
CLK
S
V
= 0.5V
RMS
= 500kHz
IN
f
–10
–20
–30
–40
–50
–60
–70
–80
–90
PHASE
–180
–270
–360
–450
–540
–630
–720
0.6
0.5
0.4
0.3
0.2
0.1
0
1V/DIV
GROUP DELAY
V
= 3.3V
S
10691 G09
0.2ms/DIV
V
= 5V
S
V
=
5V
S
V
7
= 5V
S
f
f
= 1MHz
CLK
IN
= 500Hz
1
2
3
4
5
7
1
3
5
9
11 13 15 17 19 21
0
6
4V SQUARE WAVE
P-P
FREQUENCY (kHz)
FREQUENCY (kHz)
10691 G07
10691 G08
10691fa
4
LTC1069-1
TYPICAL PERFORMANCE CHARACTERISTICS
Dynamic Range
THD + Noise vs VIN (VRMS
)
THD + Noise vs Frequency
THD + Noise vs Frequency
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
–60
–62
–64
–66
–68
–70
–72
–74
–76
–78
–80
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
f
= 500kHz
= 300mV
f
= 500kHz
CLK
f
f
= 500kHz
CLK
IN
CLK
IN
V
= 1kHz
RMS
V
=
V =
S
S
5V
5V
V = 3.3V
S
IN
V
= 3.3V
V
= 5V
S
S
V
= 0.5V
RMS
V
= 3.3V
S
V
= 5V
S
V
= 5V
RMS
S
V
= 1V
IN
V
IN
= 5V
S
V
= 2V
RMS
1.0
0.65 1.22
INPUT VOLTAGE (V
0.1
0.3
2.0
2.67
)
5.0
1
2
3
4
5
1
2
3
4
5
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
10691 G11
10691 G12
RMS
10691 G10
Supply Current vs Clock
Frequency
Output Voltage Swing vs
Temperature
Supply Current vs Supply Voltage
5
4
3
2
1
0
5
4
f
= 10Hz
5.0
4.5
4.0
3.5
3.0
2.5
2.0
CLK
V
= 5V
S
3
V
S
=
2.5V
V
= 5V
S
2
25°C
1
V
S
=
1.57V
1.57V
0
85°C
–40°C
V
S
=
V
= 5V
S
–1
–2
–3
–4
–5
V
S
=
2.5V
5V
V
= 3.3V
S
V
=
S
–40 –20
0
20
40
60
80
0.1
0.4
0
1
3
4
5
6
0.2 0.3
0.5
0.6 0.7 0.8 0.9 1.0 1.2
2
CLOCK FREQUENCY (MHz)
TOTAL SUPPLY VOLTAGE ( V)
AMBIENT TEMPERATURE (°C)
10691 G15
10691 G14
10691 G13
10691fa
5
LTC1069-1
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.
CLK(Pin5):ClockInputPin.AnyTTLorCMOSclocksource
with a square wave output and 50% duty cycle ( 10%) is
an adequate clock source for the device. The power supply
for the clock source should not necessarily be the filter’s
power supply. The analog ground of the filter should be
connected to clock’s ground at a single point only. Table 1
shows the clock’s low and high level threshold value for a
dual or a single supply operation. A pulse generator can be
used as a clock source provided the high level ON time is
For single supply operation Pin 1 should be bypassed to
the analog ground plane with a 0.47μF or larger capaci-
tor. An internal resistive divider biases Pin 1 to 1/2 the
total power supply. Pin 1 should be buffered if used to
bias other ICs. Figure 1 shows the connections for single
supply operation.
greaterthan0.42μs(V = 5V).Sinewaveslessthan100kHz
S
are not recommended for clock signal because excessive
slow clock rise or fall times generate internal clock jitter.
The maximum clock rise or fall is 1μs. 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.
A 1k resistor between the clock source and the clock input
pin (5) will slow down the rise and fall times of the clock
to further reduce charge coupling, Figure 1.
+
–
+
V , V (Pins 2, 7): Power Supply Pins. The V (Pin 2) and
–
the V (Pin 7) should be bypassed with a 0.1μF capacitor
to an adequate analog ground. The filter’s power supplies
shouldbeisolatedfromotherdigitalorhighvoltageanalog
supplies.Alownoiselinearsupplyisrecommended.Using
switching power supplies will lower the signal-to-noise
ratio of the filter. Unlike previous monolithic filters, the
power supplies can be applied at any order, that is, the
positive supply can be applied before the negative supply
and vice versa. Figure 2 shows the connection 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
Single Supply = 3.3V
6.5V
5.5V
1.5V
0.5V
1.2V
0.5V
NC (Pins 3, 6): No Connection. Pins 3 and 6 are not con-
nected to any internal circuity; they should be preferably
tied to ground.
V
(Pin 8): Filter Output Pin. Pin 8 is the output of the
OUT
filter and it can source or sink 1mA. Driving coaxial cables
or resistive loads less than 20k will degrade the total har-
monic distortion of the filter. When evaluating the device’s
dynamic range, a buffer is required to isolate the filter’s
output from coax cables and instruments.
V (Pin 4): Filter Input Pin. The filter input pin is internally
IN
connected to the inverting input of an op amp through a
43k resistor.
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
AGND
V
V
AGND
V
V
OUT
OUT
OUT
OUT
0.47μF
V
0.1μF
+
+
–
+
+
–
–
V
V
V
V
V
V
LTC1069-1
LTC1069-1
0.1μF
0.1μF
NC
NC
NC
NC
V
IN
V
IN
V
CLK
V
IN
CLK
IN
ANALOG GROUND PLANE
ANALOG GROUND PLANE
STAR
SYSTEM
GROUND
DIGITAL
GROUND
PLANE
STAR
SYSTEM
GROUND
DIGITAL
GROUND
PLANE
1k
1k
CLOCK
SOURCE
CLOCK
SOURCE
10691 F01
10691 F02
Figure 1. Connections for Single Supply Operation
Figure 2. Connections for Dual Supply Operation
10691fa
6
LTC1069-1
APPLICATIONS INFORMATION
Temperature Behavior
Any parasitic switching transients during the rise and
fall edges of the incoming clock are not part of the clock
feedthrough specifications. Switching transients have
frequency contents much higher than the applied clock;
their amplitude strongly depends on scope probing tech-
niques as well as grounding and power supply bypassing.
The clock feedthrough can be reduced, if bothersome, by
adding a single RC lowpass filter at the output pin (8) of
the LTC1069-1.
The power supply current of the LTC1069-1 has a positive
temperature coefficient. The GBW product of its internal
op amps is nearly constant and the speed of the device
doesnotdegradeathightemperatures. Figures3a, 3band
3c show the behavior of the maximum passband of the
device for various supplies and temperatures. The filter,
especially at 5V supply, has a passband behavior which
is nearly temperature independent.
Wideband Noise
Clock Feedthrough
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. The total wideband noise is nearly independent
of the clock frequency and depends slightly on the power
supply voltage (see Table 3). The clock feedthrough speci
fications are not part of the wideband noise.
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.
Table 2. Clock Feedthrough
V
CLOCK FEEDTHROUGH
S
Table 3. Wideband Noise
3.3V
5V
10μV
40μV
RMS
RMS
V
S
WIDEBAND NOISE
3.3V
5V
100μV
108μV
112μV
RMS
RMS
RMS
5V
160μVRMS
5V
2.0
1.5
2.0
1.5
2.0
1.5
V
CLK
V
= 3.3V
V
CLK
V
= 5V
V =
S
5V
= 1.5MHz
S
S
f
= 750kHz
f
= 1MHz
f
CLK
= 0.5V
= 1.2V
V = 2V
IN RMS
IN
RMS
IN
RMS
T
= 25°C
A
1.0
1.0
1.0
T
= 85°C
A
T
= 25°C
A
T
= 85°C
T
= 85°C
A
A
0.5
0.5
0.5
T
= –40°C
A
0
0
0
T = 25°C
A
T
= –40°C
A
–0.5
–1.0
–1.5
–2.0
–0.5
–1.0
–1.5
–2.0
–0.5
–1.0
–1.5
–2.0
T
= –40°C
A
1.5
2.5 3.5 4.5 5.5
FREQUENCY (kHz)
7.5
1.5 2.5 3.5 4.5 5.5
7.5 8.5 9.5 10.5
3
5
7
9
11
15
0.5
6.5
0.5
6.5
1
13
FREQUENCY (kHz)
FREQUENCY (kHz)
10691 F03a
10691 F03b
10691 F03c
Figure 3a
Figure 3b
Figure 3c
10691fa
7
LTC1069-1
APPLICATIONS INFORMATION
Aliasing
Table 4. Aliasing (fCLK = 100kHz)
INPUT FREQUENCY
OUTPUT LEVEL
OUTPUT FREQUENCY
(Aliased Frequency)
(kHz)
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 LTC1069-1 is 100 times its cutoff frequency. For
(V = 1V
)
(Relative to Input)
(dB)
IN
RMS
(kHz)
f
/f = 100:1, f
= 1kHz
CLK
C
CUTOFF
96
97
98
(or 104)
–90.0
–86.0
–71.0
–56.0
–1.1
4.0
3.0
2.0
1.5
1.0
0.5
instance, if a 98kHz, 100mV
signal is applied at the
(or 103)
(or 102)
RMS
input of an LTC1069-1 operating with a 100kHz clock, a
98.5 (or 101.5)
2kHz, 28μV
alias signal will appear at the filter output.
99
(or 101)
RMS
99.5 (or 100.5)
–0.21
Table 4 shows details.
TYPICAL APPLICATIONS
Single 5V Operation with Power Shutdown
5V
SHUTDOWN
ON
CMOS LOGIC
1
2
3
4
8
7
6
5
AGND
V
V
OUT
OUT
+
–
0.47μF
V
V
LTC1069-1
NC
0.1μF
NC
f
≤
CLK
5V
V
V
CLK
IN
IN
750kHz
0V
1069-1 TA04
Single 3.3V Supply Operation with Output Buffer
3.3V
0.1μF
1
8
AGND
V
OUT
+
0.47μF
0.1μF
2
3
4
7
6
5
1/2 LT1366
+
–
V
OUT
V
V
LTC1069-1
NC
–
NC
f
CLK
3.3V
0V
10691 TA05
V
V
CLK
IN
IN
500kHz
10691fa
8
LTC1069-1
PACKAGE DESCRIPTION
N Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
8
7
6
5
4
.255 .015*
(6.477 0.381)
1
2
3
.130 .005
.300 – .325
.045 – .065
(3.302 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
.120
.020
(0.508)
MIN
(3.048)
MIN
+.035
.325
–.015
.018 .003
(0.457 0.076)
.100
(2.54)
BSC
+0.889
8.255
(
)
N8 1002
–0.381
NOTE:
INCHES
1. DIMENSIONS ARE
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
.045 .005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.160 .005
.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
10691fa
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.
9
LTC1069-1
TYPICAL APPLICATION
Dual Supply Operation
–45
–50
–55
–60
–65
–70
–75
–80
–85
f
= 1kHz
IN
1
8
7
6
5
AGND
V
V
OUT
OUT
2
3
4
+
–
5V
0.1μF
V
V
–5V
LTC1069-1
NC
0.1μF
NC
f
CLK
5V
0V
V
V
CLK
IN
IN
500kHz
f
= 5kHz
C
0.1
1
3
INPUT VOLTAGE (V
)
RMS
10691 TA03
RELATED PARTS
PART NUMBER
LTC1068
DESCRIPTION
COMMENTS
User-Configurable, SSOP Package
50:1 f /f Ratio, 8-Pin SO Package
Very Low Noise, High Accuracy, Quad Universal Filter Building Block
Single Supply, Very Low Power, Elliptic LPF
Low Power 8th Order Butterworth LPF
LTC1069-6
LTC1164-5
LTC1164-6
LTC1164-7
CLK
C
100:1 and 50:1 f /f Ratio
CLK
C
Low Power 8th Order Elliptic LPF
100:1 and 50:1 f /f Ratio
CLK C
Low Power 8th Order Linear Phase LPF
100:1 and 50:1 f /f Ratio
CLK C
10691fa
LT 0309 REV A • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
10
●
●
© LINEAR TECHNOLOGY CORPORATION 1996
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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