LTC1069-6CS8#TRPBF [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#TRPBF |
| 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 |
| 文件： | 总10页 (文件大小：165K) |
| 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
FEATURES
DESCRIPTION
TheLTC®1069-6isamonolithiclowpower,8thorderlowpass
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.
n
8th Order Elliptic Filter in SO-8 Package
n
Single 3V Operation: Supply Current: 1mA (Typ)
f
: 14kHz (Max) S/N Ratio: 72dB
CUTOFF
n
Single 5V Operation: Supply Current: 1.2mA (Typ)
f
: 20kHz (Max) S/N Ratio: 79dB
CUTOFF
ThecutofffrequencyoftheLTC1069-6isclocktunableanditis
equal to the clock frequency divided by 50. The input signal is
sampled twice per clock cycle to lower the risk of aliasing.
n
n
n
n
n
0.1dB Passband Ripple Up to 0.9f
(Typ)
CUTOFF
42dB Attenuation at 1.3f
66dB Attenuation at 2.0f
70dB Attenuation at 2.1f
CUTOFF
CUTOFF
CUTOFF
The typical passband ripple is 0.1dB up to 0.9f
.
CUTOFF
The gain at f
is –0.7dB. The transition band of the
CUTOFF
Wide Dynamic Range, 75dB or More (S/N + THD),
LTC1069-6 features progressive attenuation reaching
42dB at 1.3f and 70dB at 2.1f . The maximum
Under Single 5V Operation
CUTOFF
CUTOFF
n
n
n
Wideband Noise: 120µV
RMS
Ratio: 50:1
stopband attenuation is 72dB.
Clock-to-f
CUTOFF
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
APPLICATIONS
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 0.4V
n
Handheld Instruments
n
to 1.4V
, the Signal-to-
Telecommunication Filters
RMS
RMS
n
n
n
n
(Noise + THD) ratio is ≥70dB. The wideband noise of the
LTC1069-6 is 125μV
Antialiasing Filters
Smoothing Filters
Audio
.
RMS
Other filter responses with higher speed can be obtained.
Please contact LTC Marketing for details.
Multimedia
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
The LTC1069-6 is available in an 8-pin SO package.
TYPICAL APPLICATION
Frequency Response
10
V
= 500mV
RMS
IN
0
–10
–20
–30
–40
–50
–60
–70
Single 3V Supply 10kHz Elliptic Lowpass Filter
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
10696fa
1
LTC1069-6
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V to V ) ................................12V
Operating Temperature Range
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
PIN CONFIGURATION
+
–
TOP VIEW
AGND
1
2
3
4
8
7
6
5
V
V
OUT
–
+
V
NC
NC
V
CLK
IN
S8 PACKAGE
8-LEAD PLASTIC SO
= 125°C, θ = 130°C/W
T
JMAX
JA
ORDER INFORMATION
LEAD FREE FINISH
LTC1069-6CS8#PBF
LTC1069-6IS8#PBF
TAPE AND REEL
PART MARKING
10696
PACKAGE DESCRIPTION
8-Lead Plastic SO
TEMPERATURE RANGE
0°C to 70°C
LTC1069-6CS8#TRPBF
LTC1069-6IS8#TRPBF
10696I
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/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range. 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.
SYMBOL
Passband Gain (f ≤ 0.2f
CONDITIONS
MIN
TYP
MAX
UNITS
)
V = 5V, f
TEST
= 200kHz
CLK
–0.25
–0.30
0.1
0.1
0.45
0.50
db
db
IN
CUTOFF
S
l
l
l
l
l
l
l
l
l
l
f
= 0.25kHz, V = 1V
IN RMS
V = 3V, f
TEST
= 200kHz
CLK
–0.25
–0.30
0.1
0.1
0.45
0.50
db
db
S
f
= 0.25kHz, V = 0.5V
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
–0.15
0.07
0.07
0.25
0.30
db
db
CUTOFF
CUTOFF
CUTOFF
CUTOFF
S
TEST
f
= 2.0kHz, V = 1V
IN RMS
V = 3V, f
TEST
= 200kHz
CLK
–0.15
–0.20
0.07
0.07
0.25
0.30
db
db
S
f
= 2.0kHz, V = 0.5V
IN RMS
V = 5V, f
TEST
= 200kHz
CLK
–0.25
–0.30
0
0
0.25
0.30
db
db
S
f
= 3.0kHz, V = 1V
IN RMS
V = 3V, f
TEST
= 200kHz
CLK
–0.25
–0.30
0
0
0.25
0.30
db
db
S
f
= 3.0kHz, V = 0.5V
IN
RMS
RMS
RMS
V = 5V, f
TEST
= 200kHz
CLK
–0.25
–0.25
0.1
0.1
0.45
0.45
db
db
S
f
= 3.6kHz, V = 1V
IN
RMS
V = 3V, f
TEST
= 200kHz
CLK
–0.25
–0.30
0.1
0.1
0.45
0.50
db
db
S
f
= 3.6kHz, V = 0.5V
IN
V = 5V, f
TEST
= 200kHz
CLK
–0.35
–0.45
0.05
0.05
0.25
0.25
db
db
S
f
= 3.8kHz, V = 1V
IN
RMS
V = 3V, f
TEST
= 200kHz
CLK
–0.45
–0.55
0.05
0.05
0.25
0.35
db
db
S
f
= 3.8kHz, V = 0.5V
IN
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2
LTC1069-6
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range. 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.
SYMBOL
Gain at f
CONDITIONS
V = 5V, f
MIN
TYP
MAX
UNITS
= 200kHz
CLK
–1.50 –0.07
–1.65 –0.07
–0.20
–0.25
db
db
CUTOFF
S
l
l
l
l
l
l
f
= 4.0kHz, V = 1V
IN RMS
TEST
V = 3V, f
TEST
= 200kHz
CLK
–1.5
–1.7
–0.07
–0.07
0
0
db
db
S
f
= 4.0kHz, V = 0.5V
IN
RMS
RMS
RMS
Gain at 1.30f
Gain at 2.00f
Gain at 0.95f
V = 5V, f = 200kHz
CLK
–42
–42
–40
–39
db
db
CUTOFF
CUTOFF
CUTOFF
S
TEST
f
= 5.2kHz, V = 1V
IN
RMS
V = 3V, f
TEST
= 200kHz
CLK
–41
–41
–38
–37
db
db
S
f
= 5.2kHz, V = 0.5V
IN
V = 5V, f
TEST
= 200kHz
CLK
–66
–66
–61
–60
db
db
S
f
= 8.0kHz, V = 1V
IN
RMS
V = 3V, f
TEST
= 200kHz
CLK
–66
–66
–60
–59
db
dB
S
f
= 8.0kHz, V = 0.5V
IN
V = 5V, f
S
= 400kHz, f
= 400kHz, f
= 7.6kHz, V = 1V
RMS
–0.5
–0.5
0.15
0
0.5
0.5
db
db
S
CLK
CLK
TEST
TEST
IN
V = 3V, f
= 7.6kHz, V = 0.5V
IN RMS
Output DC Offset (Note 1)
V = 5V, f
S
= 100kHz
= 100kHz
50
30
175
135
mV
mV
S
CLK
CLK
V = 3V, f
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
l
l
l
l
V = 3V, f
S
1.6
1.6
2.0
2.0
V
P-P
V
P-P
CLK
CLK
CLK
Power Supply Current
V = 5V, f
S
1.2
1.60
1.65
mA
mA
V = 3V, f
S
1
1.40
1.55
mA
mA
Maximum Clock Frequency
V = 5V
S
1
0.7
MHz
MHz
S
V = 3V
Input Frequency Range
Input Resistance
0
35
3
<(f – 2f )
CLK C
50
80
10
kΩ
V
Operating Supply Voltage (Note 3)
+
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.
Note 2: 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 input voltage can swing to either rail (V or ground); the
+
output typically swings 50mV from ground and 0.8V from V .
Note 4: 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
10696fa
3
LTC1069-6
TYPICAL PERFORMANCE CHARACTERISTICS
Transition Band Gain
Passband Gain vs Frequency
vs Frequency
Stopband Gain vs Frequency
–60
–62
–64
–66
–68
–70
–72
–74
–76
–78
–80
2
1
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
V
CUTOFF
V
CUTOFF
V
–10
–20
–30
–40
–50
–60
–70
–80
–90
= 0.5V
RMS
= 0.5V
RMS
= 0.5V
IN
IN
IN
RMS
0
–1
–2
20
60
FREQUENCY (kHz)
80
1
3
5
7
9
11
10
12
14
16
18
20
40
100
FREQUENCY (kHz)
FREQUENCY (kHz)
1069-6 G03
1069-6 G01
1069-6 G02
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
–10
–20
–30
–40
–50
–60
–70
–80
–90
CLK
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
10
FREQUENCY (kHz)
100
1
3
5
7
9
11 13 15 17 19 21
1
3
5
7
9
11 13 15 17 19 21
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
–90
f
= 10kHz
f
= 10kHz
CUTOFF
CUTOFF
–180
–270
–360
–450
–540
–630
–720
–810
–900
1069-6 G09
V
= SINGLE 5V 0.1ms/DIV
S
f
f
= 1MHz
CLK
= 1kHz
IN
0
4
6
8
10
12
14
2
0
2
4
8
10
12
2V SQUARE WAVE
p-p
6
FREQUENCY (kHz)
FREQUENCY (kHz)
1069-6 G07
1069-6 G08
10696fa
4
LTC1069-6
TYPICAL PERFORMANCE CHARACTERISTICS
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
IN
CLK
CUTOFF
= 1kHz
= 10kHz
–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
= SINGLE 5V
= 1V
S
V
IN
RMS
0.1
1
INPUT/OUTPUT VOLTAGE (V
3
0.1
0.5 0.76 1 1.43
INPUT VOLTAGE (V
5
1
5
10
)
)
RMS
FREQUENCY (kHz)
P-P
1069-6 G14
1069-6 G10
1069-6 G11
Output Voltage Swing
vs Temperature
Supply Current vs Supply Voltage
5
4
3
2
1
0
R
= 10k
L
4.5
V
= SINGLE 5V
S
S
4.0
2.5
V
= SINGLE 3V
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
–40 –20
0
20
40
60
80
2
4
6
10
16
TOTAL SUPPLY VOLTAGE (V)
AMBIENT TEMPERATURE (°C)
1069-6 G12
1069-6 G13
PIN FUNCTIONS
1
2
8
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 single supply operation, Pin 1 should
be bypassed to the analog ground plane with a 0.47μF
capacitor 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 1ꢀ. As the LTC1069-6 is optimized
V
OUT
AGND
V
+
–
7
V
11.325k 8.775k
NC NC
3
4
6
5
LTC1069-6
V
CLK
IN
1069-6 F01
Figure 1. Internal Biasing of the Analog Ground (Pin 1)
10696fa
5
LTC1069-6
PIN FUNCTIONS
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.
NC (Pins 3, 6): No Connection. Pins 3 and 6 are not
connected to any internal circuitry; they should be tied
to ground.
V (Pin4):FilterInputPin. TheFilterInputpinisinternally
IN
connected to the inverting input of an op amp through a
1
2
8
7
AGND
V
V
OUT
OUT
50k resistor.
0.47μF
+
+
–
V
V
V
CLK (Pin 5): Clock Input Pin. Any TTL or CMOS clock
source with a square wave output and 50ꢀ duty cycle
( 10ꢀ) 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 the clock’s ground at a single
point only. Table 1 shows the clock’s low and high level
threshold value for a dual or single supply operation. A
pulse generator can be used as a clock source provided
0.1μF
LTC1069-6
3
4
6
5
NC
NC
V
V
CLK
IN
IN
ANALOG GROUND PLANE
STAR
SYSTEM
GROUND
DIGITAL
GROUND
PLANE
1k
CLOCK
SOURCE
1069-6 F02
the high level ON time is greater than 0.42μs (V = 5V).
S
Sine waves less than 100kHz are not recommended for
clock frequencies because, excessive slow clock rise or
falltimesgenerateinternalclockjitter.Themaximumclock
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).
Figure 2. 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 capacitor to an adequate analog ground. The filter’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-noiseratioofthefilter.Unlikepreviousmonolithic
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 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
2
8
7
1.5V
0.5V
AGND
V
V
OUT
OUT
1.2V
0.5V
+
–
–
+
V
V
V
0.1μF
V
0.1μF
LTC1069-6
V
OUT
(Pin 8): Filter Output Pin. Pin 8 is the output of the
3
4
6
5
NC
NC
filter,anditcansource8mAorsink1mA.Thetotalharmonic
distortion of the filter will degrade when driving coaxial
cables or loads less than 20k without an output buffer.
V
V
CLK
IN
IN
ANALOG GROUND PLANE
STAR
DIGITAL
GROUND
PLANE
1k
SYSTEM
GROUND
CLOCK
SOURCE
1069-6 F03
Figure 3. Connections for Dual Supply Operation
10696fa
6
LTC1069-6
APPLICATIONS INFORMATION
Temperature Behavior
2
1
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
does not degrade at high temperatures. Figures 4a, 4b
and 4c show the behavior of the passband of the device
for various supplies and temperatures. The filter has a
passband behavior which is temperature independent.
85°C
0
–40°C
f
f
= 500kHz
CLK
CUTOFF
–1
–2
= 10kHz
Clock Feedthrough
1
1
1
3
5
7
9
11 13 15 17 19 21
FREQUENCY (kHz)
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 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.
1069-6 F04a
Figure 4a
2
1
V
V
= SINGLE 5V
S
= 1V
IN
RMS
Table 2. Clock Feedthrough
85°C
0
V
CLOCK FEEDTHROUGH
S
–40°C
3.3V
5V
100μV
170μV
350μV
RMS
RMS
RMS
f
= 750kHz
= 15kHz
CLK
CUTOFF
–1
–2
f
10V
Any parasitic switching transients during the rising and
falling 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
techniques as well as grounding and power supply
bypassing.Theclockfeedthroughcanbereducedbyadding
a single RC lowpass filter at the Output (Pin 8).
3
5
7
9
11 13 15 17 19 21
FREQUENCY (kHz)
1069-6 F04a
Figure 4b
2
1
V
V
=
IN
5V
= 1.5V
S
RMS
85°C
0
–40°C
f
= 1MHz
= 20kHz
CLK
CUTOFF
–1
–2
f
4
7
10 13 16 19 22 25 28 31
FREQUENCY (kHz)
1069-6 F04c
Figure 4c
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7
LTC1069-6
APPLICATIONS INFORMATION
Wideband Noise
Aliasing
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
widebandnoisecannotbereducedbyaddingpostfiltering.
The total wideband noise is nearly independent of the
clock frequency and depends slightly on the power supply
voltage(seeTable3).Theclockfeedthroughspecifications
are not part of the wideband noise.
Aliasing is an inherent phenomenon of sampled data
systems and occurs for input frequencies approaching
the sampling frequency. The internal sampling frequency
of the LTC1069-6 is 100 times its cutoff frequency. For
instance, if a 98.5kHz, 100mV
signal is applied at
RMS
the input of an LTC1069-6 operating with a 50kHz clock,
a 1.5kHz, 484μV
alias signal will appear at the filter
RMS
output. Table 4 shows details.
Table 4. Aliasing (fCLK = 50kHz)
INPUT FREQUENCY
OUTPUT LEVEL
(Relative to Input)
(dB)
OUTPUT FREQUENCY
(Aliased Frequency)
(kHz)
Table 3. Wideband Noise
(V = 1V
)
IN
RMS
(kHz)
V
WIDEBAND NOISE
S
3.3V
5V
118μV
123μV
127μV
f
/f = 50:1, f
= 1kHz
–78.3
–70.4
–80.6
–46.3
–2.8
RMS
RMS
RMS
CLK
C
CUTOFF
96 (or 104)
97 (or 103)
98 (or 102)
4.0
3.0
2.0
1.5
1.0
0.5
5V
98.5 (or 101.5)
99 (or 101)
99.5 (or 100.5)
–1.38
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8
LTC1069-6
PACKAGE DESCRIPTION
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(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)
s 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
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9
LTC1069-6
TYPICAL APPLICATION
Single 5V Operation with Power Shutdown
5V
ON
SHUTDOWN
1
2
3
4
8
7
6
5
AGND
V
V
OUT
OUT
+
–
0.47μF
V
V
LTC1069-6
NC
0.1μF
NC
f
≤
CLK
5V
V
IN
V
CLK
IN
750kHz
0V
1069-6 TA03
Single 3V Supply Operation with Output Buffer
3.3V
0.1μF
5
6
1
2
3
4
8
7
6
5
8
AGND
V
OUT
+
7
0.47μF
0.1μF
1/2 LT1366
V
OUT
+
–
V
V
LTC1069-6
NC
–
4
NC
f
CLK
3.3V
0V
V
V
CLK
IN
IN
1069-6 TA04
500kHz
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
RELATED PARTS
PART NUMBER
LTC1068
DESCRIPTION
COMMENTS
Very Low Noise, High Accuracy, Quad Universal Filter Building Block
Low Power, Progressive Elliptic LPF
User-Configurable, SSOP Package
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
Low Power 8th Order Butterworth LPF
/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
10696fa
LT 0309 REV A • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
10
●
●
© LINEAR TECHNOLOGY CORPORATION 2008
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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