LINER LTC1069-1IN8

LTC1069-1
Low Power, 8th Order
Progressive Elliptic,
Lowpass Filter
FEATURES
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8th Order Elliptic Filter in SO-8 Package
Operates from Single 3.3V to ±5V Power Supplies
– 20dB at 1.2 fCUTOFF
– 52dB at 1.4 fCUTOFF
– 70dB at 2 fCUTOFF
Wide Dynamic Range
110µVRMS 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
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APPLICATI
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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 0.9 fCUTOFF. The stopband attenuation of the
LTC1069-1 features a progressive elliptic response
reaching 20dB attenuation at 1.2 fCUTOFF, 52dB attenuation at 1.4fCUTOFF and 70dB attenuation at 2fCUTOFF.
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.
The low power feature of the LTC1069-1 does not penalize the device’s dynamic range. With ±5V supplies and an
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.
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Telecommunication Filters
Antialiasing Filters
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DESCRIPTIO
The LTC ®1069-1 is a monolithic 8th order lowpass filter
featuring clock-tunable cutoff frequency and 2.5mA power
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
Single 3.3V Supply 3kHz Elliptic Lowpass Filter
–10
+
0.47µF
3.3V
0.1µF
2
AGND
+
VOUT
8
VOUT
– 7
V
LTC1069-1
3
6
NC
NC
VIN
4
V
VIN
CLK
5
–20
GAIN (dB)
1
fCLK
300kHz
1069-1 TA01
–30
–40
–50
–60
–70
–80
1.5
3
6
4.5
FREQUENCY (kHz)
7.5
1069-1 TA02
1
LTC1069-1
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Total Supply Voltage (V + to V –) ............................. 12V
Maximum Voltage at
Any Pin ............................ (V– – 0.3V) ≤ V ≤ (V+ + 0.3V)
Operating Temperature Range
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
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ABSOLUTE
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
TOP VIEW
AGND 1
8
VOUT
V+ 2
7
V–
NC 3
6
NC
VIN 4
5
CLK
N8 PACKAGE
8-LEAD PDIP
LTC1069-1CN8
LTC1069-1CS8
LTC1069-1IN8
LTC1069-1IS8
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
CONDITIONS
Passband Gain (fIN ≤ 0.25fCUTOFF)
VS = ±5V,
fTEST = 1.25kHz,
fCLK = 500kHz
VIN = 1VRMS
VS = 3.3V,
fTEST = 0.5kHz,
Gain at 0.50fCUTOFF
Gain at 0.75fCUTOFF
Gain at 0.90fCUTOFF
Gain at 0.95fCUTOFF
Gain at fCUTOFF
Gain at 1.25fCUTOFF
2
MIN
TYP
MAX
UNITS
– 0.30
– 0.35
0.2
●
0.70
0.75
dB
dB
fCLK = 200kHz
VIN = 0.5VRMS
– 0.30
– 0.35
0.2
●
0.70
0.75
dB
dB
VS = ±5V,
fTEST = 2.5kHz,
fCLK = 500kHz
VIN = 1VRMS
– 0.10
– 0.11
– 0.03
●
0.10
0.11
dB
dB
VS = 3.3V,
fTEST = 1kHz,
fCLK = 200kHz
VIN = 0.5VRMS
– 0.10
– 0.11
– 0.03
●
0.10
0.11
dB
dB
VS = ±5V,
fTEST = 3.75kHz,
fCLK = 500kHz
VIN = 1VRMS
– 0.20
– 0.25
0.04
●
0.20
0.25
dB
dB
VS = 3.3V,
fTEST = 1.5kHz,
fCLK = 200kHz
VIN = 0.5VRMS
– 0.20
– 0.25
0.04
●
0.20
0.25
dB
dB
VS = ±5V,
fTEST = 4.5kHz,
fCLK = 500kHz
VIN = 1VRMS
– 0.20
– 0.25
– 0.01
●
0.20
0.25
dB
dB
VS = 3.3V,
fTEST = 1.8kHz,
fCLK = 200kHz
VIN = 0.5VRMS
– 0.20
– 0.25
– 0.01
●
0.20
0.25
dB
dB
VS = ±5V,
fTEST = 4.75kHz,
fCLK = 500kHz
VIN = 1VRMS
– 0.30
– 0.35
– 0.05
●
0.30
0.35
dB
dB
VS = 3.3V,
fTEST = 1.9kHz,
fCLK = 200kHz
VIN = 0.5VRMS
– 0.30
– 0.35
– 0.04
●
0.30
0.35
dB
dB
VS = ±5V,
fTEST = 5.0kHz,
fCLK = 500kHz
VIN = 1VRMS
– 1.25
– 1.35
– 0.70
●
– 0.25
– 0.15
dB
dB
VS = 3.3V,
fTEST = 2.0kHz,
fCLK = 200kHz
VIN = 0.5VRMS
– 1.25
– 1.35
– 0.61
●
– 0.25
– 0.15
dB
dB
VS = ±5V,
fTEST = 6.25kHz,
fCLK = 500kHz
VIN = 1VRMS
– 30
– 31
– 27
●
– 25
– 24
dB
dB
VS = 3.3V,
fTEST = 2.5kHz,
fCLK = 200kHz
VIN = 0.5VRMS
– 30
– 31
– 27
●
– 25
– 24
dB
dB
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
CONDITIONS
Gain at 1.50fCUTOFF
VS = ±5V,
fTEST = 7.5kHz,
fCLK = 500kHz
VIN = 1VRMS
VS = 3.3V,
fTEST = 3kHz,
fCLK = 200kHz
VIN = 0.5VRMS
VS = ±5V,
VS = 4.75V,
VS = 3.3V,
fCLK = 500kHz
fCLK = 400kHz
fCLK = 200kHz
Output DC Offset (Input at AGND)
Output Voltage Swing
VS = ±5V
VS = 4.75V
VS = 3.3V
Power Supply Current
VS = ±5V
VS = 4.75V
VS = 3.3V
Maximum Clock Frequency
VS = ±5V
VS = 4.75V
VS = 3.3V
MIN
TYP
MAX
UNITS
– 58
– 59
– 53
●
– 50
– 49
dB
dB
– 58
– 59
– 53
●
– 50
– 49
dB
dB
30
20
15
150
100
mV
mV
mV
±4.0
±1.7
±0.9
3.25
1.25
0.60
V
V
V
3.8
2.5
2.0
5.5
4.5
3.5
mA
mA
mA
●
●
●
fCLK = 500kHz
fCLK = 400kHz
fCLK = 200kHz
– 3.25
– 1.50
– 0.70
●
●
●
1.2
0.8
0.5
Input Frequency Range
0
Input Resistance
30
43
±1.57
Operating Power Supply Voltage
MHz
MHz
MHz
fCLK/2
MHz
70
kΩ
±5.5
V
The ● denotes specificatons which apply over the full operating
temperature range.
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TYPICAL PERFORMANCE CHARACTERISTICS
Transition Band Gain vs
Frequency
Passband Gain vs Frequency
0.8
VS = ±5V
fCLK = 500kHz
fC = 5kHz
VIN = 2VRMS
–70
VS = ±5V
fCLK = 500kHz
fC = 5kHz
VIN = 2VRMS
0
–10
0.4
–20
0.2
–30
GAIN (DB)
GAIN (dB)
0.6
Stopband Gain vs Frequency
10
0
–0.2
–72
–74
–76
GAIN (dB)
1.0
–40
–50
–78
–80
–82
–0.4
–60
–84
–0.6
–70
–86
–0.8
–80
–88
–1.0
–90
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
FREQUENCY (kHz)
1069-1 G01
5
6
7
8
9
FREQUENCY (kHz)
10
11
1069-1 G02
VS = ±5V
fCLK = 500kHz
fC = 5kHz
VIN = 2VRMS
–90
11 12 13 14 15 16 17 18 19 20 21
FREQUENCY (kHz)
1069-1 G03
3
LTC1069-1
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TYPICAL PERFORMANCE CHARACTERISTICS
Passband Gain vs Clock
Frequency, VS = Single 3.3V
Passband Gain vs Clock
Frequency, VS = Single 5V
2.0
2.0
2.0
VS = SINGLE 3.3V
VIN = 0.5VRMS
1.5
1.0
1.0
fCLK = 750kHz
fC = 7.5kHz
GAIN (dB)
0.5
0
–0.5
fCLK = 500kHz
fC = 5kHz
–1.0
2.5
1.5
3.5
0.5
4.5
5.5
6.5
7.5
FREQUENCY (kHz)
0
–0.5
fCLK = 500kHz
fC = 5kHz
fCLK = 500kHz
fC = 5kHz
–0.5
fCLK = 1MHz
fC = 10kHz
–1.0
–1.5
–2.0
0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5
FREQUENCY (kHz)
–2.0
1
3
5
7
9
11
13
15
FREQUENCY (kHz)
1069-1 G06
Phase and Group Delay vs
Frequency
Transient Response
0
VS = SINGLE 5V
fCLK = 500kHz
fC = 5kHz
–90
–10
PHASE
–180
0.6
PHASE (DEG)
–30
–40
–50
–60
–70
VS = 3.3V
–80
VS = 5V
3
5
0.5
–360
0.4
–450
0.3
–540
0.2
GROUP DELAY
–630
VS = ±5V
–720
0
0
7 9 11 13 15 17 19 21
FREQUENCY (kHz)
1
2
4
3
5
7
1069-1 G09
1069-1 G08
Dynamic Range
THD + Noise vs VIN (VRMS)
THD + Noise vs Frequency
–40
THD + Noise vs Frequency
–40
–60
fCLK = 500kHz
fIN = 1kHz
VS =
5V
–55
fCLK = 500kHz
VIN = 300mVRMS
–62
VS =
±5V
–60
VS = 3.3V
–70
–75
THD + NOISE (dB)
–50
–65
6
FREQUENCY (kHz)
1069-1 G07
–45
0.2ms/DIV
VS = ±5V
fCLK = 1MHz
fIN = 500Hz
4VP-P SQUARE WAVE
0.1
–64
–50
–66
–55
–68
VS = ±5V
–70
–72
VS = 3.3V
–74
VS = 5V
–60
–70
–75
–76
–80
–85
–78
–85
1.0
2.0
5.0
2.67
0.65 1.22
INPUT VOLTAGE (VRMS) 1069-1 G10
0.3
–80
–90
1
2
3
INPUT FREQUENCY (kHz)
4
5
1069-1 G11
VS = 3.3V
VIN = 0.5VRMS
–65
–80
–90
0.1
fCLK = 500kHz
–45
THD + NOISE (dB)
1
–270
GROUP DELAY (ms)
–20
1V/DIV
fCLK = 500kHz
VIN = 0.5VRMS
0
GAIN (dB)
0
1069-1 G05
10
THD + NOISE (dB)
0.5
–1.5
Gain vs Supply Voltage
4
fCLK = 1.5MHz
fC = 15kHz
1.0
fCLK = 1MHz
fC = 10kHz
1069-1 G04
–90
VS = ±5V
VIN = 2VRMS
1.5
fCLK = 750kHz
fC = 7.5kHz
–1.0
–1.5
–2.0
0.5
VS = SINGLE 5V
VIN = 1.2VRMS
GAIN (dB)
1.5
GAIN (dB)
Passband Gain vs Clock
Frequency, VS = ±5V
VS = 5V
VIN = 1VRMS
VS = ±5V
VIN = 2VRMS
1
2
3
INPUT FREQUENCY (kHz)
4
5
1069-1 G12
LTC1069-1
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TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage Swing vs
Temperature
Supply Current vs Clock
Frequency
Supply Current vs Supply Voltage
5
5
fCLK = 10Hz
5.0
25°C
3
85°C
–40°C
2
1
VS = ±5V
4.0
3.5
VS = 5V
3.0
2.5
VS = 3.3V
3
1
VS = ±1.57V
–1
–2
VS = ±2.5V
–3
–4
–5
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.2
CLOCK FREQUENCY (MHz)
6
VS = ±1.57V
0
2.0
1
3
4
5
2
TOTAL SUPPLY VOLTAGE (±V)
VS = ±2.5V
2
0
0
VS = ±5V
4
4.5
OUTPUT VOLTAGE SWING (V)
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
4
VS = ±5V
–40
–20
0
20
40
60
AMBIENT TEMPERATURE (°C)
1069-1 G15
1069-1 G14
1069-1 G13
80
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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.
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.
Figure 1 shows the connections for single supply operation.
1
0.47µF
V+
0.1µF
VIN
2
3
4
AGND
8
VOUT
1
VOUT
7
V–
V+
LTC1069-1
6
NC
NC
VIN
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 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 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.
V+
0.1µF
5
CLK
DIGITAL
GROUND
PLANE
3
VIN
ANALOG GROUND PLANE
STAR
SYSTEM
GROUND
2
4
AGND
8
VOUT
VOUT
7
V–
V–
0.1µF
V+
LTC1069-1
6
NC
NC
VIN
5
CLK
ANALOG GROUND PLANE
STAR
SYSTEM
GROUND
1k
CLOCK
SOURCE
DIGITAL
GROUND
PLANE
1k
CLOCK
SOURCE
1069-1 F01
Figure 1. Connections for Single Supply Operation
1069-1 F02
Figure 2. Connections for Dual 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 preferably tied to ground.
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.
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 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 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
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.
Table 1. Clock Source High and Low Thresholds
POWER SUPPLY
Dual Supply = ±5V
Single Supply = 10V
Single Supply = 5V
Single Supply = 3.3V
HIGH LEVEL
1.5V
6.5V
1.5V
1.2V
LOW LEVEL
0.5V
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
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
does not degrade at high temperatures. Figures 3a, 3b and
3c show the behavior of the maximum passband of the
device for various supplies and temperatures. The filter,
2.0
1.5
TA = 25°C
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
0
TA = –40°C
–0.5
0.5
1.0
TA = 85°C
TA = 25°C
0
–0.5
TA = –40°C
TA = –40°C
–0.5
–1.0
–1.5
–1.5
–1.5
–2.0
0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5
FREQUENCY (kHz)
–2.0
2.5
3.5
4.5
5.5
6.5
7.5
FREQUENCY (kHz)
1069-1 F03a
Figure 3a
6
TA = 25°C
0
–1.0
1.5
TA = 85°C
0.5
–1.0
–2.0
0.5
VS = ±5V
fCLK = 1.5MHz
VIN = 2VRMS
1.5
1.0
TA = 85°C
0.5
VS = 5V
fCLK = 1MHz
VIN = 1.2VRMS
GAIN (dB)
1.0
GAIN (dB)
Clock Feedthrough
2.0
VS = 3.3V
fCLK = 750kHz
VIN = 0.5VRMS
GAIN (dB)
1.5
especially at ±5V supply, has a passband behavior which
is nearly temperature independent.
1
3
5
7
9
13
15
1069-1 F03c
1069-1 F03b
Figure 3b
11
FREQUENCY (kHz)
Figure 3c
LTC1069-1
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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.
Table 2. Clock Feedthrough
VS
3.3V
5V
±5V
CLOCK FEEDTHROUGH
10µVRMS
40µVRMS
160µVRMS
supply voltage (see Table 3). The clock feedthrough specifications are not part of the wideband noise.
Table 3. Wideband Noise
VS
3.3V
5V
±5V
WIDEBAND NOISE
100µVRMS
108µVRMS
112µVRMS
Aliasing
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 techniques
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.
Wideband Noise
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
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.
Table 4. Aliasing (fCLK = 100kHz)
INPUT FREQUENCY
OUTPUT LEVEL
(Relative to Input)
(VIN = 1VRMS)
(kHz)
(dB)
fCLK/fC = 100:1, fCUTOFF = 1kHz
96 (or 104)
– 90.0
97 (or 103)
– 86.0
98 (or 102)
– 71.0
985. (or 101.5)
– 56.0
99 (or 101)
– 1.1
99.5 (or 100.5)
– 0.21
OUTPUT FREQUENCY
(Aliased Frequency)
(kHz)
4.0
3.0
2.0
1.5
1.0
0.5
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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
AGND
VOUT
8
VOUT
1
2
7
V–
V+
LTC1069-1
3
6
NC
NC
0.47µF
0.1µF
VIN
4
VIN
CLK
5
0.47µF
0.1µF
fCLK ≤
750kHz
5V
0V
1069-1 TA04
VIN
2
AGND
+
VOUT
8
+
– 7
1/2 LT1366
V
LTC1069-1
3
6
NC
NC
4
V
VIN
CLK
5
VOUT
–
fCLK
500kHz
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
3.3V
0V
1069-1 TA05
7
LTC1069-1
U
TYPICAL APPLICATIONS
Dual Supply Operation
–45
fIN = 1kHz
–50
AGND
8
VOUT
VOUT
2
7
V–
V+
LTC1069-1
0.1µF
3
6
NC
NC
5V
0.1µF
4
VIN
VIN
5
CLK
– 5V
fCLK
500kHz
5V
0V
fC = 5kHz
THD + NOISE (dB)
–55
1
–60
–65
–70
–75
–80
–85
0.1
1
INPUT VOLTAGE (VRMS)
3
1069-1 TA03
U
PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherswise noted.
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.300 – 0.325
(7.620 – 8.255)
0.009 – 0.015
(0.229 – 0.381)
(
+0.025
0.325 –0.015
+0.635
8.255
–0.381
)
0.045 – 0.065
(1.143 – 1.651)
0.400*
(10.160)
MAX
0.130 ± 0.005
(3.302 ± 0.127)
0.065
(1.651)
TYP
8
7
6
5
1
2
3
4
0.255 ± 0.015*
(6.477 ± 0.381)
0.125
(3.175)
MIN
0.005
(0.127)
MIN
0.015
(0.380)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
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)
0.010 – 0.020
× 45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0°– 8° TYP
0.016 – 0.050
0.406 – 1.270
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
0.189 – 0.197*
(4.801 – 5.004)
8
7
6
5
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
1
2
3
4
SO8 0695
RELATED PARTS
PART NUMBER
LTC1068
LTC1069-6
LTC1164-5
LTC1164-6
LTC1164-7
8
DESCRIPTON
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
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 ● (408) 432-1900
FAX: (408) 434-0507● TELEX: 499-3977 ● www.linear-tech.com
COMMENTS
User-Configurable, SSOP Package
50:1 fCLK/fC Ratio, 8-Pin SO Package
100:1 and 50:1 fCLK/fC Ratio
100:1 and 50:1 fCLK/fC Ratio
100:1 and 50:1 fCLK/fC Ratio
LT/GP 1196 7K • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 1996