LTC1069-6 [Linear]
Single Supply, Very Low Power, Elliptic Lowpass Filter; 单电源供电，超低功耗，椭圆低通滤波器
| 型号： | LTC1069-6 |
| 厂家： | 
Linear |
| 描述： | Single Supply, Very Low Power, Elliptic 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 |
LTC1069-6
Single Supply, Very Low
Power, Elliptic Lowpass Filter
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FEATURES
DESCRIPTION
The LTC®1069-6 is a monolithic low power, 8th order low-
pass filter optimized for single 3V or single 5V supply
operation. The LTC1069-6 typically consumes 1mA under
single 3V supply operation and 1.2mA under 5V operation.
■
8th Order Elliptic Filter in SO-8 Package
Single 3V Operation: Supply Current: 1mA (Typ)
■
fCUTOFF: 14kHz (Max)
S/N Ratio: 72dB
■
Single 5V Operation: Supply Current: 1.2mA (Typ)
The cutoff frequency of the LTC1069-6 is clock tunable and it
is equal to the clock frequency divided by 50. The input signal
is sampled twice per clock cycle to lower the risk of aliasing.
fCUTOFF: 20kHz (Max)
S/N Ratio: 79dB
■
±0.1dB Passband Ripple Up to 0.9fCUTOFF (Typ)
■
The typical passband ripple is ±0.1dB up to 0.9fCUTOFF
.
42dB Attenuation at 1.3fCUTOFF
■
■
■
The gain at fCUTOFF is –0.7dB. The transition band of the
LTC1069-6featuresprogressiveattenuationreaching42dB
at 1.3fCUTOFF and 70dB at 2.1fCUTOFF. The maximum
stopband attenuation is 72dB.
66dB Attenuation at 2.0fCUTOFF
70dB Attenuation at 2.1fCUTOFF
Wide Dynamic Range, 75dB or More (S/N + THD),
Under Single 5V Operation
Wideband Noise: 120µVRMS
Clock-to-fCUTOFF Ratio: 50:1
■
■
■
The LTC1069-6 can be clock tuned for cutoff frequencies
up to 20kHz (single 5V supply) and for cutoff frequencies
up to 14kHz (single 3V supply).
Internal Sample Rate: 100:1
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The low power feature of the LTC1069-6 does not penalize
the device’s dynamic range. With single 5V supply and an
input range of 0.4VRMS to 1.4VRMS, the Signal-to-(Noise
+ THD) ratio is ≥70dB. The wideband noise of the
APPLICATIONS
■
Handheld Instruments
Telecommunication Filters
Antialiasing Filters
Smoothing Filters
■
LTC1069-6 is 125µVRMS
.
■
■
Other filter responses with higher speed can be obtained.
Please contact LTC Marketing for details.
■
Audio
Multimedia
■
The LTC1069-6 is available in an 8-pin SO package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATION
Frequency Response
10
V
= 500mV
RMS
IN
Single 3V Supply 10kHz Elliptic Lowpass Filter
0
–10
–20
–30
–40
–50
–60
–70
AGND
V
OUT
3V
+
–
0.47µF
V
V
0.1µF
LTC1069-6
NC
NC
f
= 500kHz
V
CLK
CLK
IN
1069-6 TA01
–80
5
10
20
FREQUENCY (kHz)
25
15
1069-6 TA02
1
LTC1069-6
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ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
Total Supply Voltage (V+ to V–) .............................. 12V
Operating Temperature Range
ORDER PART
TOP VIEW
NUMBER
AGND
1
2
3
4
8
7
6
5
V
V
LTC1069-6C ............................................ 0°C to 70°C
LTC1069-6I ........................................ –40°C to 85°C
Storage Temperature ............................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
OUT
–
+
LTC1069-6CS8
LTC1069-6IS8
V
NC
NC
V
CLK
IN
S8 PART MARKING
S8 PACKAGE
8-LEAD PLASTIC SO
10696
10696I
TJMAX = 125°C, θJA = 110°C/ W
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/50. The fCLK signal level is TTL or CMOS (clock rise or fall time ≤1µs)
RL = 10k, VS = 5V, 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
MIN
TYP
MAX
UNITS
)
= 200kHz
CLK
–0.25
–0.30
0.1
0.1
0.45
0.50
dB
dB
IN
CUTOFF
S
f
= 0.25kHz, V = 1V
●
●
●
●
●
●
●
●
●
●
●
●
●
●
TEST
IN
RMS
V = 3V, f
S
= 200kHz
CLK
–0.25
–0.30
0.1
0.1
0.45
0.50
dB
dB
f
= 0.25kHz, V = 0.5V
TEST
IN RMS
Gain at 0.50f
Gain at 0.75f
Gain at 0.90f
Gain at 0.95f
V = 5V, f = 200kHz
CLK
–0.10 0.07
–0.15 0.07
0.25
0.30
dB
dB
CUTOFF
CUTOFF
CUTOFF
CUTOFF
S
f
= 2.0kHz, V = 1V
TEST
IN RMS
V = 3V, f
S
= 200kHz
CLK
–0.15 0.07
–0.20 0.07
0.25
0.30
dB
dB
f
= 2.0kHz, V = 0.5V
TEST
IN RMS
V = 5V, f
S
= 200kHz
CLK
–0.25
–0.30
0
0
0.25
0.30
dB
dB
f
= 3.0kHz, V = 1V
TEST
IN RMS
V = 3V, f
S
= 200kHz
CLK
–0.25
–0.30
0
0
0.25
0.30
dB
dB
f
= 3.0kHz, V = 0.5V
TEST
IN
RMS
RMS
RMS
RMS
RMS
V = 5V, f
S
= 200kHz
CLK
–0.25
–0.25
0.1
0.1
0.45
0.45
dB
dB
f
= 3.6kHz, V = 1V
TEST
IN RMS
V = 3V, f
S
= 200kHz
CLK
–0.25
–0.30
0.1
0.1
0.45
0.50
dB
dB
f
= 3.6kHz, V = 0.5V
TEST
IN
V = 5V, f
S
= 200kHz
CLK
–0.35 0.05
–0.45 0.05
0.25
0.25
dB
dB
f
= 3.8kHz, V = 1V
TEST
IN RMS
V = 3V, f
S
= 200kHz
CLK
–0.45 0.05
–0.55 0.05
0.25
0.35
dB
dB
f
= 3.8kHz, V = 0.5V
TEST
IN
Gain at f
V = 5V, f = 200kHz
CLK
–1.50 –0.07 –0.20
–1.65 –0.07 –0.25
dB
dB
CUTOFF
S
f
= 4.0kHz, V = 1V
TEST
IN RMS
V = 3V, f
S
= 200kHz
CLK
–1.5 –0.07
–1.7 –0.07
0
0
dB
dB
f
= 4.0kHz, V = 0.5V
TEST
IN
Gain at 1.30f
V = 5V, f = 200kHz
CLK
–42
–42
–40
–39
dB
dB
CUTOFF
S
f
= 5.2kHz, V = 1V
TEST
IN RMS
V = 3V, f
S
= 200kHz
CLK
–41
–41
–38
– 37
dB
dB
f
= 5.2kHz, V = 0.5V
TEST
IN
2
LTC1069-6
ELECTRICAL CHARACTERISTICS
fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/50. The fCLK signal level is TTL or CMOS (clock rise or fall time ≤1µs)
RL = 10k, VS = 5V, TA = 25°C, unless otherwise specified. All AC gains are measured relative to the passband gain.
PARAMETER
CONDITIONS
V = 5V, f
MIN
TYP
MAX
UNITS
Gain at 2.00f
= 200kHz
CLK
–66
–66
–61
–60
dB
dB
CUTOFF
S
f
= 8.0kHz, V = 1V
●
●
TEST
IN
RMS
V = 3V, f
S
= 200kHz
CLK
–66
–66
–60
–59
dB
dB
f
= 8.0kHz, V = 0.5V
TEST
IN RMS
Gain at 0.95f
V = 5V, f
V = 3V, f
S
= 400kHz, f
= 400kHz, f
= 7.6kHz, V = 1V
RMS
–0.5
–0.5
0.15
0
0.5
0.5
dB
dB
CUTOFF
S
CLK
CLK
TEST
TEST
IN
= 7.6kHz, V = 0.5V
IN RMS
Output DC Offset (Note 1)
V = 5V, f
V = 3V, f
S
= 100kHz
= 100kHz
50
30
175
135
mV
mV
S
CLK
CLK
Output DC Offset Tempco
V = 5V, V = 3V
30
µV/°C
S
S
Output Voltage Swing (Note 2)
V = 5V, f
= 100kHz
= 100kHz
= 100kHz
= 100kHz
3.4
3.2
4.2
4.2
V
V
S
CLK
P-P
P-P
●
●
●
●
V = 3V, f
S
1.6
1.5
2.0
2.0
V
V
CLK
CLK
CLK
P-P
P-P
Power Supply Current
V = 5V, f
S
1.2
1.60
1.65
mA
mA
V = 3V, f
S
1.0
1.40
1.55
mA
mA
Maximum Clock Frequency
V = 5V
V = 3V
S
1.0
0.7
MHz
MHz
S
Input Frequency Range
Input Resistance
0
35
3
<(f
– 2f )
CLK C
50
80
10
kΩ
Operating Supply Voltage (Note 3)
V
+
The
●
denotes specifications which apply over the full operating
Note 2: The input voltage can swing to either rail (V or ground); the
+
temperature range.
output typically swings 50mV from ground and 0.8V from V .
Note 1: The input offset voltage is measured with respect to AGND (Pin 1).
The input (Pin 4) is also shorted to the AGND pin. The analog ground pin
Note 3: The LTC1069-6 is optimized for 3V and 5V operation. Although the
device can operate with a single 10V supply or ±5V, the total harmonic
distortion will be degraded. For single 10V or ±5V supply operation we
recommend to use the LTC1069-1.
potential is internally set to (0.437)(V
).
SUPPLY
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TYPICAL PERFORMANCE CHARACTERISTICS
Passband Gain vs Frequency
Transition Band Gain vs Frequency
Stopband Gain vs Frequency
2
–60
–62
–64
–66
–68
–70
–72
–74
–76
–78
–80
10
0
V
f
= SINGLE 3V
= 500kHz
V
f
= SINGLE 3V
= 500kHz
V
f
= SINGLE 3V
= 500kHz
S
CLK
S
CLK
S
CLK
f
= 10kHz
f
= 10kHz
f
= 10kHz
CUTOFF
CUTOFF
CUTOFF
–10
–20
–30
–40
–50
–60
–70
–80
–90
V
= 0.5V
RMS
V
= 0.5V
RMS
V
= 0.5V
IN
IN
1
IN
RMS
0
–1
–2
1
3
5
7
9
11
10
12
14
16
18
20
20
60
FREQUENCY (kHz)
80
40
100
FREQUENCY (kHz)
FREQUENCY (kHz)
1069-6 G01
1069-6 G02
1069-6 G03
3
LTC1069-6
TYPICAL PERFORMANCE CHARACTERISTICS
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Amplitude Response
vs Supply Voltage
Passband Gain vs Clock Frequency
Passband Gain vs Clock Frequency
2
1
2
1
10
0
f
= 500kHz
= 0.5V
RMS
V
V
= SINGLE 3V
V
V
= SINGLE 5V
CLK
IN
S
S
V
= 0.5V
= 1V
IN
RMS
IN
RMS
f
= 750kHz
CLK
–10
–20
–30
–40
–50
–60
–70
–80
–90
f
= 15kHz
CUTOFF
0
0
f
= 500kHz
CLK
SINGLE 5V
SINGLE 3V
–1
–2
–1
–2
f
f
f
CLK
CLK
CLK
f
= 10kHz
CUTOFF
500kHz
750kHz
1MHz
f
f
f
CUTOFF
10kHz
CUTOFF
15kHz
CUTOFF
20kHz
1
3
5
7
9
11 13 15 17 19 21
1
3
5
7
9
11 13 15 17 19 21
1
10
FREQUENCY (kHz)
100
FREQUENCY (kHz)
FREQUENCY (kHz)
1069-6 G06
1069-6 G04
1069-6 G05
Phase vs Frequency
Group Delay vs Frequency
Transient Response
90
0
4.00E-04
3.50E-04
3.00E-04
2.50E-04
2.00E-04
1.50E-04
1.00E-04
5.00E-05
0.00E+00
V
f
= SINGLE 5V
= 500kHz
V
f
= SINGLE 5V
S
CLK
S
= 500kHz
CLK
f
= 10kHz
–90
f
= 10kHz
CUTOFF
CUTOFF
–180
–270
–360
–450
–540
–630
–720
–810
–900
1069-6 G09
VS = SINGLE 5V 0.1ms/DIV
fCLK = 1MHz
f
IN = 1kHz
2VP-P SQUAREWAVE
0
4
6
8
10
12
14
0
2
4
8
10
12
2
6
FREQUENCY (kHz)
FREQUENCY (kHz)
1069-6 G07
1069-6 G08
Dynamic Range THD + Noise
vs Input/Output Voltage
Dynamic Range THD + Noise
vs Input Voltage
THD + Noise vs Frequency
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
–40
–45
f
f
f
= 170kHz
= 3.4kHz
= 1kHz
f
f
= 500kHz
f
f
= 500kHz
CLK
CUTOFF
IN
CLK
CUTOFF
CLK
IN
= 10kHz
= 1kHz
–50
–55
–60
–65
–70
–75
–80
–85
–90
V
= 2.945V
P-P
IN
V
S
= SINGLE 3V
V
= SINGLE 3V
S
V
= 0.5V
IN
RMS
V
=
S
SINGLE 5V
V
S
V
= SINGLE 5V
= 1V
IN
RMS
0.1
0.5 0.76 1 1.43
INPUT VOLTAGE (V
5
1
5
10
0.1
1
INPUT/OUTPUT VOLTAGE (V
3
)
RMS
FREQUENCY (kHz)
)
P-P
1069-6 G10
1069-6 G14
1069-6 G11
4
LTC1069-6
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TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage Swing
vs Temperature
Supply Current vs Supply Voltage
5
R
L
= 10k
4.5
V
= SINGLE 5V
= SINGLE 3V
S
S
4
3
2
1
0
4.0
2.5
V
2.0
85°C
25°C
80
60
40
20
0
V
= SINGLE 3V
–40°C
S
V
= SINGLE 5V
S
0
8
12 14
2
4
6
10
16
–40 –20
0
20
40
60
80
TOTAL SUPPLY VOLTAGE (V)
AMBIENT TEMPERATURE (°C)
1069-6 G12
1069-6 G13
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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
asinglepoint. For single supplyoperation, Pin 1shouldbe
bypassedtotheanaloggroundplanewitha0.47µFcapaci-
tor or larger. An internal resistive divider biases Pin 1 to
0.4366 times the total power supply of the device (Figure
1). That is, with a single 5V supply, the potential at Pin 1
is 2.183V ±1%. As the LTC1069-6 is optimized for single
supply operation, the internal biasing of Pin 1 allows
optimum output swing. The AGND pin should be buffered
if used to bias other ICs. Figure 2 shows the connections
for single supply operation.
V+, V– (Pins 2, 7): Power Supply Pins. The V+ (Pin 2) and
the V– (Pin 7, if used) should be bypassed with a 0.1µF
capacitorto an adequate analog ground. Thefilter’s power
supplies should be isolated from other digital or high
voltage analog supplies. A low noise linear supply is
recommended. Switching power supplies will lower the
signal-to-noise ratio of the filter. Unlike previous mono-
lithic 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 3 shows the con-
nection for dual supply operation.
1
2
8
7
AGND
V
V
OUT
OUT
0.47µF
+
+
–
V
V
V
0.1µF
LTC1069-6
3
4
6
5
NC
NC
1
2
8
7
V
OUT
AGND
V
+
–
V
V
IN
V
IN
CLK
11.325k 8.775k
NC NC
ANALOG GROUND PLANE
3
4
6
5
LTC1069-6
STAR
DIGITAL
GROUND
PLANE
1k
SYSTEM
GROUND
V
CLK
IN
CLOCK
SOURCE
1069-6 F01
Figure 1. Internal Biasing of the Analog Ground (Pin 1)
1069-6 F02
Figure 2. Connections for Single Supply Operation
5
LTC1069-6
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PIN FUNCTIONS
only. Table 1 shows the clock’s low and high level thresh-
old value for a dual or single supply operation. A pulse
generator can be 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
frequencies because, excessive slow clock rise or fall
times generate internal clock jitter. The maximum clock
rise or fall time 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).
1
8
7
AGND
V
V
OUT
OUT
2
+
–
–
+
V
V
V
V
0.1µF
0.1µF
LTC1069-6
3
4
6
5
NC
NC
V
V
IN
CLK
IN
ANALOG GROUND PLANE
STAR
DIGITAL
GROUND
1k
SYSTEM
GROUND
PLANE
CLOCK
SOURCE
1069-6 F03
Figure 3. Connections for Dual Supply Operation
Table 1. Clock Source High and Low Thresholds
NC (Pins 3, 6): No Connection. Pins 3 and 6 are not
connected to any internal circuitry; they should be tied to
ground.
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
VIN (Pin4):FilterInputPin. TheFilterInputpinisinternally
connected to the inverting input of an op amp through a
50k resistor.
1.5V
0.5V
1.2V
0.5V
CLK (Pin 5): Clock Input Pin. Any TTL or CMOS clock
source 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
shouldbeconnectedtotheclock’sgroundatasinglepoint
VOUT (Pin 8): Filter Output Pin. Pin 8 is the output of the
filter, and it can source 8mA or sink 1mA. The total
harmonic distortion of the filter will degrade when driving
coaxial cables or loads less than 20k without an output
buffer.
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APPLICATIONS INFORMATION
2
Temperature Behavior
V
V
= SINGLE 3V
S
= 0.5V
IN
RMS
The power supply current of the LTC1069-6 has a positive
temperature coefficient. The GBW product of its internal
op amps is nearly constant and the speed of the device
doesnotdegradeathightemperatures. Figures4a, 4band
4c show the behavior of the passband of the device for
various supplies and temperatures. The filter has a pass-
band behavior which is temperature independent.
1
0
85°C
–40°C
f
f
= 500kHz
CLK
CUTOFF
–1
–2
= 10kHz
1
3
5
7
9
11 13 15 17 19 21
FREQUENCY (kHz)
1069-6 F04a
Figure 4a
6
LTC1069-6
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APPLICATIONS INFORMATION
2
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).
V
V
= SINGLE 5V
S
= 1V
IN
RMS
1
0
85°C
–40°C
Wideband Noise
f
= 750kHz
CLK
–1
–2
f
= 15kHz
CUTOFF
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. The frequency contents of
the wideband noise lie within the filter’s passband. The
wideband noise cannot be reduced by adding post filter-
ing. 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 specifica-
tions are not part of the wideband noise.
1
3
5
7
9
11 13 15 17 19 21
FREQUENCY (kHz)
1069-6 F04a
Figure 4b
2
1
V
V
= ±5V
= 1.5V
S
IN
RMS
Table 3. Wideband Noise
85°C
V
S
WIDEBAND NOISE
0
–40°C
3.3V
5V
118µV
123µV
127µV
RMS
RMS
RMS
f
= 1MHz
= 20kHz
CLK
CUTOFF
–1
–2
f
±5V
1
4
7
10 13 16 19 22 25 28 31
FREQUENCY (kHz)
1069-6 F04c
Aliasing
Aliasing is an inherent phenomenon of sampled data
systemsandoccursforinputfrequenciesapproachingthe
sampling frequency. The internal sampling frequency of
the LTC1069-6 is 100 times its cutoff frequency. For
instance, if a 98.5kHz, 100mVRMS signal is applied at the
input of an LTC1069-6 operating with a 50kHz clock, a
1.5kHz, 484µVRMS alias signal will appear at the filter
output. Table 4 shows details.
Figure 4c
Clock Feedthrough
The clock feedthrough is defined as the RMS value of the
clock frequency and its harmonics that are present at the
filter’sOutput(Pin8). Theclockfeedthroughistestedwith
the Input (Pin 4) shorted to AGND (Pin 1) 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 in Table 2.
Table 4. Aliasing (fCLK = 50kHz)
INPUT FREQUENCY
OUTPUT LEVEL
(Relative to Input)
(dB)
OUTPUT FREQUENCY
(Aliased Frequency)
(kHz)
(V = 1V
)
IN
RMS
(kHz)
Table 2. Clock Feedthrough
f
/f = 50:1, f
= 1kHz
CLK
C
CUTOFF
V
S
CLOCK FEEDTHROUGH
96 (or 104)
97 (or 103)
–78.3
–70.4
–80.6
–46.3
–2.8
4.0
3.0
2.0
1.5
1.0
0.5
3.3V
5V
100µV
170µV
350µV
RMS
RMS
RMS
98 (or 102)
10V
98.5 (or 101.5)
99 (or 101)
Any parasitic switching transients during the rising and
fallingedgesoftheincomingclockarenotpartoftheclock
feedthroughspecifications. Switchingtransientshavefre-
99.5 (or 100.5)
–1.38
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
LTC1069-6
U
TYPICAL APPLICATIONS
Single 3V Supply Operation with Output Buffer
Single 5V Operation with Power Shutdown
3.3V
5V
ON
SHUTDOWN
0.1µF
1
2
3
4
8
7
6
5
AGND
V
V
OUT
OUT
5
6
1
2
3
4
8
7
6
5
8
AGND
V
OUT
+
+
–
0.47µF
7
V
V
0.47µF
0.1µF
1/2 LT1366
V
OUT
+
–
V
V
LTC1069-6
NC
0.1µF
LTC1069-6
NC
NC
–
4
NC
f
≤
CLK
750kHz
5V
V
IN
V
CLK
IN
f
CLK
500kHz
3.3V
0V
0V
V
V
CLK
IN
IN
1069-6 TA04
1069-6 TA03
Single 3V Supply Voice Band Lowpass Filter with Rail-to-Rail Input and Output
3V
0.1µF
8
5
6
1
2
3
4
8
7
6
5
AGND
V
OUT
+
3V
7
1µF
1/2 LT1366
+
–
V
V
LTC1069-6
NC
0.1µF
–
NC
10k
170kHz
V
CLK
IN
1069-6 TA05
40.2k
2
3
–
1
1/2 LT1366
10k
+
4
270pF 40.2k
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTION
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)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
SO8 0695
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
2
3
4
RELATED PARTS
PART NUMBER
LTC1068
DESCRIPTON
COMMENTS
User-Configurable, SSOP Package
Very Low Noise, High Accuracy, Quad Universal Filter Building Block
Low Power, Progressive Elliptic LPF
Low Power 8th Order Butterworth LPF
LTC1069-1
LTC1164-5
LTC1164-6
LTC1164-7
f
f
f
f
/f Ratio 100:1, 8-Pin SO Package
C
CLK
CLK
CLK
CLK
/f Ratio 100:1 and 50:1
C
Low Power 8th Order Elliptic LPF
/f Ratio 100:1 and 50:1
C
Low Power 8th Order Linear Phase LPF
/f Ratio 100:1 and 50:1
C
LT/GP 1196 7K • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
8
●
●
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
LINEAR TECHNOLOGY CORPORATION 1996
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