LTC1069-1CN8 [Linear]
Low Power, 8th Order Progressive Elliptic, Lowpass Filter; 低功耗, 8阶渐进椭圆,低通滤波器型号: | LTC1069-1CN8 |
厂家: | Linear |
描述: | Low Power, 8th Order Progressive Elliptic, Lowpass Filter |
文件: | 总8页 (文件大小:242K) |
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
EATURE
S
F
■
■
■
■
■
■
■
■
■
■
8th Order Elliptic Filter in SO-8 Package
Operates from Single 3.3V to ±5V Power Supplies
–20dB at 1.2fCUTOFF
The cutoff frequency (fCUTOFF) of the LTC1069-1 is equal
to the clock frequency divided by 100. The gain at fCUTOFF
is –0.7dB and the typical passband ripple is ±0.15dB
up to 0.9fCUTOFF. The stopband attenuation of the
LTC1069-1 features a progressive elliptic response
reaching 20dB attenuation at 1.2fCUTOFF, 52dB attenua-
–52dB at 1.4fCUTOFF
–70dB at 2fCUTOFF
Wide Dynamic Range
110µV
Wideband Noise
tion at 1.4fCUTOFF and 70dB attenuation at 2fCUTOFF
.
RMS
3.8mA Supply Current with ±5V Supplies
2.5mA Supply Current with Single 5V Supply
2mA Supply Current with Single 3.3V Supply
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.
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The low power feature of the LTC1069-1 does not penal-
izethedevice’sdynamicrange.With±5Vsuppliesandan
input range of 0.3VRMS to 2.5VRMS, the signal-to-(noise
+ THD) ratio is ≥70dB. The wideband noise of the
LTC1069-1 is 110µVRMS. Other filter responses with
lower power or higher speed can be obtained. Please
contact LTC marketing for details.
PPLICATI
A
S
■
Telecommunication Filters
Antialiasing Filters
■
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DESCRIPTIO
The LTC®1069-1 is a monolithic 8th order lowpass filter
featuringclock-tunablecutofffrequencyand2.5mApower
supply current with a single 5V supply. An additional
feature of the LTC1069-1 is operation with a single 3.3V
supply.
The LTC1069-1 is available in 8-pin PDIP and 8-pin SO
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATI
Frequency Response
10
0
–10
–20
–30
–40
–50
–60
–70
Single 3.3V Supply 3kHz Elliptic Lowpass Filter
1
2
3
4
8
7
6
5
+
AGND
V
V
OUT
OUT
0.47µF
3.3V
0.1µF
+
–
V
V
LTC1069-1
NC
NC
f
CLK
V
V
CLK
IN
IN
300kHz
1069-1 TA01
–80
1.5
3
6
7.5
4.5
FREQUENCY (kHz)
1069-1 TA02
1
LTC1069-1
W
U
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PACKAGE RDER I FOR ATIO
ABSOLUTE AXI U RATI GS
Total Supply Voltage (V+ to V–) ............................. 12V
Maximum Voltage at
ORDER PART
NUMBER
TOP VIEW
Any Pin ............................ (V– – 0.3V) ≤ V ≤ (V+ + 0.3V)
Operating Temperature Range
AGND
1
2
3
4
8
7
6
5
V
OUT
–
+
LTC1069-1CN8
LTC1069-1CS8
LTC1069-1IN8
LTC1069-1IS8
V
V
NC
NC
LTC1069-1C ........................................... 0°C to 70°C
LTC1069-1I ....................................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
CLK
V
IN
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
S8 PART NUMBER
TJMAX = 110°C, θJA = 100°C/W (N8)
TJMAX = 110°C, θJA = 150°C/W (S8)
10691
10691I
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
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, TA = 25°C, unless otherwise noted. All AC gains are measured relative to the passband gain.
PARAMETER
Passband Gain (f ≤ 0.25f
CONDITIONS
V = ±5V,
MIN
TYP
MAX
UNITS
)
f = 500kHz
CLK
–0.30
–0.35
0.2
0.70
0.75
dB
dB
IN
CUTOFF
S
f
= 1.25kHz,
V
= 1V
●
●
●
●
●
●
●
●
●
●
●
●
●
●
TEST
IN
RMS
V = 3.3V,
f
V
= 200kHz
–0.30
–0.35
0.2
–0.03
–0.03
0.04
0.70
0.75
dB
dB
S
CLK
f
= 0.5kHz,
= 0.5V
TEST
IN
RMS
Gain at 0.50f
Gain at 0.75f
Gain at 0.90f
Gain at 0.95f
V = ±5V,
f
V
= 500kHz
–0.10
–0.11
0.10
0.11
dB
dB
CUTOFF
CUTOFF
CUTOFF
CUTOFF
S
CLK
f
= 2.5kHz,
= 1V
TEST
IN
RMS
V = 3.3V,
f
V
= 200kHz
–0.10
–0.11
0.10
0.11
dB
dB
S
CLK
f
= 1kHz,
= 0.5V
TEST
IN
RMS
V = ±5V,
f
V
= 500kHz
–0.20
–0.25
0.20
0.25
dB
dB
S
CLK
f
= 3.75kHz,
= 1V
TEST
IN
RMS
V = 3.3V,
f
V
= 200kHz
–0.20
–0.25
0.04
0.20
0.25
dB
dB
S
CLK
f
= 1.5kHz,
= 0.5V
TEST
IN
RMS
V = ±5V,
f
V
= 500kHz
= 1VRMS
–0.20
–0.25
–0.01
–0.01
–0.05
–0.04
–0.70
–0.61
–27
0.20
0.25
dB
dB
S
CLK
f
= 4.5kHz,
TEST
IN
V = 3.3V,
f
V
= 200kHz
–0.20
–0.25
0.20
0.25
dB
dB
S
CLK
f
= 1.8kHz,
= 0.5V
TEST
IN
RMS
V = ±5V,
f
V
= 500kHz
–0.30
–0.35
0.30
0.35
dB
dB
S
CLK
f
= 4.75kHz,
= 1V
TEST
IN
RMS
V = 3.3V,
f
V
= 200kHz
–0.30
–0.35
0.30
0.35
dB
dB
S
CLK
f
= 1.9kHz,
= 0.5V
TEST
IN
RMS
Gain at f
V = ±5V,
f
V
= 500kHz
–1.25
–1.35
–0.25
–0.15
dB
dB
CUTOFF
S
CLK
f
= 5.0kHz,
= 1V
TEST
IN
RMS
V = 3.3V,
f
V
= 200kHz
–1.25
–1.35
–0.25
–0.15
dB
dB
S
CLK
f
= 2.0kHz,
= 0.5V
TEST
IN
RMS
Gain at 1.25f
V = ±5V,
f
V
= 500kHz
–30
–31
–25
–24
dB
dB
CUTOFF
S
CLK
f
= 6.25kHz,
= 1V
TEST
IN
RMS
V = 3.3V,
f
= 200kHz
–30
–31
–27
–25
–24
dB
dB
S
CLK
f
= 2.5kHz,
V = 0.5V
IN RMS
TEST
2
LTC1069-1
ELECTRICAL CHARACTERISTICS
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, TA = 25°C, unless otherwise noted. All AC gains are measured relative to the passband gain.
PARAMETER
Gain at 1.50f
CONDITIONS
V = ±5V,
MIN
TYP
MAX
UNITS
f = 500kHz
CLK
–58
–59
–53
–50
–49
dB
dB
CUTOFF
S
f
= 7.5kHz,
V
IN
= 1V
●
●
TEST
RMS
V = 3.3V,
f
V
= 200kHz
–58
–59
–53
–50
–49
dB
dB
S
CLK
f
= 3kHz,
= 0.5V
TEST
IN
RMS
Output DC Offset (Input at AGND)
Output Voltage Swing
V = ±5V,
f
f
f
= 500kHz
= 400kHz
= 200kHz
30
20
15
150
mV
mV
mV
S
CLK
CLK
CLK
V = 4.75V,
S
V = 3.3V,
S
100
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 = 3.3
S
V
Power Supply Current
V = ±5V
f
f
f
= 500kHz
= 400kHz
= 200kHz
●
●
●
3.8
2.5
2.0
5.5
4.5
3.5
mA
mA
mA
S
CLK
CLK
CLK
V = 4.75V
S
V = 3.3
S
V
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
The
● denotes specificatons which apply over the full operating
temperature range.
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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
= ±5V
CLK
= 5kHz
V
f
C
V
= ±5V
S
S
V
= ±5V
S
= 500kHz
= 500kHz
CLK
f
f
= 500kHz
CLK
C
f
f
= 5kHz
C
= 5kHz
0.6
–10
–20
–30
–40
–50
–60
–70
–80
–90
V
= 2V
= 2V
IN
RMS
IN
RMS
V
= 2V
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)
1069-1 G02
1069-1 G03
1069-1 G01
3
LTC1069-1
TYPICAL PERFORMANCE CHARACTERISTICS
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Passband Gain vs Clock
Frequency, VS = Single 3.3V
Passband Gain vs Clock
Frequency, VS = Single 5V
Passband Gain vs Clock
Frequency, VS = ±5V
2.0
1.5
2.0
1.5
2.0
1.5
V
V
= SINGLE 3.3V
= 0.5V
V
V
= ±5V
S
IN
V
V
= SINGLE 5V
= 1.2V
S
IN
S
IN
= 2V
RMS
RMS
RMS
1.0
1.0
f
= 1.5MHz
= 15kHz
1.0
f
= 750kHz
f
= 1MHz
CLK
C
f
= 750kHz
= 7.5kHz
CLK
C
CLK
CLK
C
f
f
= 7.5kHz
f = 10kHz
C
f
0.5
0.5
0.5
0
0
0
f
C
= 1MHz
f
= 500kHz
CLK
CLK
C
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
3
5
7
9
11
15
0.5
6.5
1.5 2.5 3.5 4.5 5.5
7.5 8.5 9.5 10.5
1
13
0.5
6.5
FREQUENCY (kHz)
FREQUENCY (kHz)
1069-1 G04
1069-1 G06
1069-1 G05
Phase and Group Delay vs
Frequency
Transient Response
Gain vs Supply Voltage
10
0
0
–90
f
V
= 500kHz
V
f
C
= SINGLE 5V
= 500kHz
CLK
IN
S
CLK
= 5kHz
= 0.5V
RMS
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
GROUP DELAY
V
= 3.3V
S
0.2ms/DIV
V
= 5V
S
V
S = ±5V
V
7
= ±5V
f
CLK = 1MHz
S
fIN = 500Hz
1
2
3
4
5
7
1
3
5
9
11 13 15 17 19 21
0
6
4VP-P SQUARE WAVE
1069-1 G09
FREQUENCY (kHz)
FREQUENCY (kHz)
1069-1 G07
1069-1 G08
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
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
–60
–62
–64
–66
–68
–70
–72
–74
–76
–78
–80
f
= 500kHz
f
f
= 500kHz
f
= 500kHz
CLK
CLK
IN
CLK
V = 300mV
IN
= 1kHz
RMS
V
=
V =
S
S
5V
±5V
V
IN
= 3.3V
S
V
= 3.3V
V
S
= ±5V
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
2.0
2.67
1
2
3
4
5
0.1
0.3
5.0
1
2
3
4
5
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
)
RMS
1069-1 G12
1069-1 G10
1069-1 G11
4
LTC1069-1
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TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage Swing vs
Temperature
Supply Current vs Clock
Supply Current vs Supply Voltage
Frequency
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
= ±2.5V
S
V
= ±5V
S
2
25°C
1
V
= ±1.57V
= ±1.57V
S
0
85°C
–40°C
V
S
V
= 5V
S
–1
–2
–3
–4
–5
V
= ±2.5V
S
V
= 3.3V
S
V
= ±5V
S
–40 –20
0
20
40
60
80
0.5
0.6 0.7 0.8 0.9 1.0 1.2
0.1
0.4
0
1
3
4
5
6
0.2 0.3
2
TOTAL SUPPLY VOLTAGE (±V)
CLOCK FREQUENCY (MHz)
AMBIENT TEMPERATURE (°C)
1069-1 G15
1069-1 G14
1069-1 G13
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PIN FUNCTIONS
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
should be isolated from other digital or high voltage
analog supplies. A low noise linear supply is recom-
mended. Using switching power supplies will lower the
signal-to-noise ratio of the filter. Unlike previous mono-
lithic 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 con-
nection for dual supply operation.
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.
For single supply operation Pin 1 should be bypassed to the
analog ground plane with a 0.47µF or larger capacitor. 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.
Figure1showstheconnectionsforsinglesupplyoperation.
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
AGND
V
V
OUT
AGND
V
V
OUT
OUT
OUT
0.47µF
+
+
–
–
+
+
–
V
V
V
V
V
V
V
LTC1069-1
LTC1069-1
0.1µF
0.1µF
0.1µF
NC
NC
NC
NC
V
V
CLK
V
IN
V
CLK
IN
IN
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
1069-1 F01
1069-1 F02
Figure 2. Connections for Dual Supply Operation
Figure 1. Connections for Single Supply Operation
5
LTC1069-1
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PIN FUNCTIONS
NC (Pins 3, 6): No Connection. Pins 3 and 6 are not
connected to any internal circuity; they should be prefer-
ably tied to ground.
fall is 1µs. The clocksignal 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 cou-
pling, Figure 1.
VIN (Pin 4): Filter Input Pin. The filter input pin is internally
connected to the inverting input of an op amp through a
43k resistor.
Table 1. Clock Source High and Low Thresholds
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
should be connected to clock’s ground at a single point
only. Table 1 shows the clock’s low and high level thresh-
old 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 greater than 0.42µs (VS = ±5V). Sine
waves less than 100kHz are not recommended for clock
signal because excessive slow clock rise or fall times
generate internal clock jitter. The maximum clock rise or
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
1.5V
1.2V
5.5V
0.5V
0.5V
VOUT (Pin 8): Filter Output Pin. Pin 8 is the output of the
filter and it can source or sink 1mA. Driving coaxial cables
or resistive loads less than 20k will degrade the total
harmonic 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.
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APPLICATIONS INFORMATION
Temperature Behavior
especially at ±5V supply, has a passband behavior which
is nearly temperature independent.
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,
Clock Feedthrough
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
2.0
2.0
1.5
2.0
1.5
V
CLK
V
= ±5V
S
V
f
IN
= 3.3V
V
f
= 5V
S
S
1.5
1.0
f
= 1.5MHz
= 750kHz
= 1MHz
CLK
= 0.5V
RMS
CLK
= 1.2V
RMS
= 2V
RMS
IN
V
V
IN
T
= 25°C
A
1.0
T = 85°C
A
1.0
T
= 25°C
A
T
= 85°C
0.5
T
= 85°C
A
A
0.5
0.5
T
= –40°C
A
0
T
= 25°C
A
0
0
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
3
5
7
9
11
15
1
13
1.5
2.5 3.5 4.5 5.5
FREQUENCY (kHz)
7.5
0.5
6.5
1.5 2.5 3.5 4.5 5.5
7.5 8.5 9.5 10.5
6.5
0.5
FREQUENCY (kHz)
FREQUENCY (kHz)
1069-1 F03c
1069-1 F03a
1069-1 F03b
Figure 3a
Figure 3b
Figure 3c
6
LTC1069-1
U
W U U
APPLICATIONS INFORMATION
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.
supplyvoltage(seeTable3). Theclockfeedthroughspeci-
fications are not part of the wideband noise.
Table 3. Wideband Noise
V
WIDEBAND NOISE
S
3.3V
5V
±5V
100µV
108µV
112µV
Table 2. Clock Feedthrough
RMS
RMS
RMS
V
CLOCK FEEDTHROUGH
S
3.3V
5V
10µV
40µV
RMS
RMS
Aliasing
±5V
160µV
RMS
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
instance, if a 98kHz, 100mVRMS signal is applied at the
input of an LTC1069-1 operating with a 100kHz clock, a
2kHz, 28µVRMS alias signal will appear at the filter output.
Table 4 shows details.
Any parasitic switching transients during the rise and fall
edges of the incoming clock are not part of the clock
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, if bothersome, by
addingasingleRClowpassfilterattheoutputpin(8)ofthe
LTC1069-1.
Table 4. Aliasing (fCLK = 100kHz)
INPUT FREQUENCY
(V = 1V
OUTPUT LEVEL
(Relative to Input)
(dB)
OUTPUT FREQUENCY
(Aliased Frequency)
(kHz)
)
RMS
IN
Wideband Noise
(kHz)
/f = 100:1, f = 1kHz
CUTOFF
f
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
the clock frequency and depends slightly on the power
CLK
C
96 (or 104)
97 (or 103)
98 (or 102)
985. (or 101.5)
99 (or 101)
99.5 (or 100.5)
–90.0
–86.0
–71.0
–56.0
–1.1
4.0
3.0
2.0
1.5
1.0
0.5
–0.21
U
TYPICAL APPLICATIONS
Single 3.3V Supply Operation with Output Buffer
Single 5V Operation with Power Shutdown
3.3V
5V
SHUTDOWN
ON
CMOS LOGIC
0.1µF
1
2
3
4
8
7
6
5
AGND
V
V
OUT
OUT
1
2
3
4
8
AGND
V
OUT
+
+
–
0.47µF
0.47µF
0.1µF
V
V
7
6
5
1/2 LT1366
+
–
V
OUT
V
V
LTC1069-1
NC
0.1µF
LTC1069-1
NC
NC
–
NC
f
≤
CLK
750kHz
5V
V
IN
V
CLK
IN
f
CLK
500kHz
3.3V
0V
1069-1 TA05
0V
V
V
CLK
IN
IN
1069-1 TA04
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
LTC1069-1
U
TYPICAL APPLICATIONS
Dual Supply Operation
–45
–50
–55
–60
f
IN
= 1kHz
1
8
7
6
5
AGND
V
V
OUT
OUT
2
3
4
+
–
5V
0.1µF
V
V
–5V
–65
–70
–75
LTC1069-1
NC
0.1µF
NC
f
CLK
500kHz
5V
0V
V
V
CLK
IN
IN
f
= 5kHz
C
–80
–85
0.1
1
3
INPUT VOLTAGE (V
)
RMS
1069-1 TA03
U
Dimensions in inches (millimeters) unless otherswise noted.
PACKAGE DESCRIPTION
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
0.130 ± 0.005
0.300 – 0.325
0.045 – 0.065
(3.302 ± 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
8
1
7
6
5
0.065
(1.651)
TYP
0.255 ± 0.015*
(6.477 ± 0.381)
0.009 – 0.015
(0.229 – 0.381)
0.125
0.005
(0.127)
MIN
0.015
(0.380)
MIN
(3.175)
MIN
+0.025
–0.015
2
4
3
0.325
+0.635
8.255
(
)
–0.381
0.100 ± 0.010
(2.540 ± 0.254)
0.018 ± 0.003
(0.457 ± 0.076)
N8 0695
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
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
**
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
SO8 0695
1
2
3
4
RELATED PARTS
PART NUMBER
LTC1068
DESCRIPTON
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
Low Power 8th Order Elliptic LPF
Low Power 8th Order Linear Phase LPF
LTC1069-6
LTC1164-5
LTC1164-6
LTC1164-7
CLK
C
100:1 and 50:1 f /f Ratio
CLK
C
100:1 and 50:1 f /f Ratio
CLK C
100:1 and 50:1 f /f Ratio
CLK
C
LT/GP 1196 7K • PRINTED IN USA
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
LINEAR TECHNOLOGY CORPORATION 1996
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