LTC1064-4
1
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FEATURES
APPLICATIO S
U
DESCRIPTIO
U
TYPICAL APPLICATIO
U
■
Antialiasing Filters
■
Telecom Filters
■
Sinewave Generators
■
8th Order Filter in a 14-Pin Package
■
80dB or More Stopband Attenuation at 2 × f
CUTOFF
■
50:1, f
CLK
to f
CUTOFF
Ratio (Cauer)
100:1, f
CLK
to f
–3dB
Ratio (Transitional)
■
135µV
RMS
Total Wideband Noise
■
0.03% THD or Better
■
100kHz Maximum f
CUTOFF
Frequency
■
Operates up to ±8V Power Supplies
■
Input Frequency Range up to 50 Times the Filter
Cutoff Frequency
Low Noise, 8th Order, Clock
Sweepable Cauer Lowpass Filter
The LTC
®
1064-4 is an 8th order, clock sweepable Cauer
lowpass switched capacitor filter. An external TTL or
CMOS clock programs the value of the filter’s cutoff
frequency. With Pin 10 at V
+
, the f
CLK
to f
CUTOFF
ratio is
50:1; the filter has a Cauer response and with compensa-
tion the passband ripple is ±0.1dB. The stopband attenu-
ation is 80dB at 2 × f
CUTOFF
. Cutoff frequencies up to
100kHz can be achieved. With Pin 10 at V
–
, the f
CLK
to
f
–3dB
ratio is 100:1, the filter has a transitional Butterworth-
Cauer response with lower noise and lower delay
nonlinearity than the Cauer response. The stopband
attenuation at 2.5 × f
–3dB
is 92dB. Cutoff frequencies up to
50kHz can be achieved.
The LTC1064-4 features low noise and low harmonic
distortion even when input voltages up to 3V
RMS
are
applied. The LTC1064-4 overall performance competes
with equivalent multiple op amp active realizations. The
LTC1064-4 is pin compatible with the LTC1064-1,
LTC1064-2 and LTC1064-3.
The LTC1064-4 is manufactured using Linear Technology’s
enhanced LTCMOS
TM
silicon gate process.
8th Order Clock Sweepable Lowpass Elliptic Filter Frequency Response
FREQUENCY (Hz)
1k
VOUT/VIN (dB)
20
0
–20
–40
–60
–80
–100 10k 100k 1M
1064-4 TA01b
fCLK = 1MHz, 100:1
TA = 25°C
fCLK = 2MHz, 50:1
fCLK = 5MHz, 50:1
CCOMP1 = 30pF, CCOMP2 = 18pF
* FOR FREQUENCIES ABOVE 20kHz AND MINIMUM PASSBAND RIPPLE REFER
TO THE PIN DESCRIPTION SECTION FOR COMPENSATION GUIDELINES.
V
+
/V
–
LTC1064-4
1
2
3
4
5
6
7
14
13
12
11
10
9
8
R(h, I)
COMP2*
V
–
f
CLK
50/100
V
OUT
NC
INV C
V
IN
AGND
V
+
AGND
COMP1*
INV A
1064 TA01
CLOCK
(TTL, ≤5MHz)
–8V
8V
V
OUT
V
IN
0.1µF
0.1µF
NOTE:THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1µF CAPACITOR
CLOSE TO THE PACKAGE. BYPASSING PIN 10 WITH 0.1µF CAPACITOR
REDUCES CLOCK FEEDTHROUGH. THE CONNECTION BETWEEN PINS 7
AND 14 SHOULD BE PHYSICALLY DONE UNDER THE PACKAGE.
LTCMOS is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC1064-4
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PARAMETER CONDITIONS MIN TYP MAX UNITS
Passband Gain Referenced to 0dB, 1Hz to 0.05f
CUTOFF
●–0.5 0.1 dB
Gain TempCo 0.0002 dB/°C
Passband Edge Frequency, f
C
20 ± 1% kHz
Gain at f
C
Referenced to Passband Gain, f
C
= 20kHz ●–0.4 0.7 dB
–3dB Frequency 50:1 (Cauer Response) 21.5 kHz
100:1 (Transitional Response) 10 kHz
Passband Ripple (Note 2) 0.1f
C
to 0.95f
C
Referenced to Passband Gain ●–0.15 0.6 dB
Stopband Attenuation At 1.7f
CUTOFF
●–56 –60 dB
Stopband Attenuation At 2f
CUTOFF
–80 dB
Input Frequency Range 50:1, Pin 10 at V
+
0f
CLK
kHz
100:1, Pin 10 at V
–
0f
CLK
/2 kHz
Output Voltage Swing and V
S
= ±2.37V ●±1.1 V
Operating Input Voltage Range V
S
= ±5V ●±3.1 V
V
S
= ±7.5V ●±5.0 V
Total Harmonic Distortion V
S
= ±5V, Input = 1V
RMS
at 1kHz 0.015 %
V
S
= ±7.5V, Input = 3V
RMS
at 1kHz 0.03 %
Wideband Noise V
S
= ±5V, Input = GND 1Hz to 999kHz 120 µV
RMS
V
S
= ±7.5V, Input = GND 1Hz to 999kHz 135 µV
RMS
(Note 1)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Total Supply Voltage (V
+
to V
–
) ............................ 16.5V
Input Voltage at Any Pin ......V
–
–0.3V ≤ V
IN
≤ V
+
+0.3V
Power Dissipation.............................................. 400mW
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Operating Temperature Range
LTC1064-4M (OBSOLETE) ............... – 55°C to 125°C
LTC1064-4C ....................................... –40°C to 85°C
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = ±7.5V, 50:1, fCLK = 1MHz, fC = 20kHz, R1 = 10k, TTL clock input
level unless otherwise specified.
ORDER PART
NUMBER
LTC1064-4CN
ORDER PART
NUMBER
LTC1064-4CSW
T
JMAX
= 150°C, θ
JA
= 90°C/W
T
JMAX
= 110°C, θ
JA
= 70°C/W
LTC1064-4MJ
LTC1064-4CJ
OBSOLETE PACKAGE
Consider the N14 Package for Alternate Source
1
2
3
4
5
6
7
TOP VIEW
J PACKAGE
14-LEAD CERDIP
N PACKAGE
14-LEAD PDIP
14
13
12
11
10
9
8
INV C
VIN
AGND
V+
AGND
COMP1
INV A
R(h, I)
COMP2
V–
fCLK
RATIO
VOUT
NC
1
2
3
4
5
6
7
8
TOP VIEW
SW PACKAGE
16-LEAD PLASTIC (WIDE) SO
16
15
14
13
12
11
10
9
INV C
V
IN
AGND
V
+
AGND
NC
COMP1
INV A
R(h, I)
COMP2
V
–
NC
f
CLK
RATIO
NC
V
OUT
ELECTRICAL CHARACTERISTICS
PACKAGE/ORDER I FOR ATIO
UU
W
ABSOLUTE AXI U RATI GS
WWWU
LTC1064-4
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The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = ±7.5V, 50:1, fCLK = 1MHz, fC = 20kHz, R1 = 10k, TTL clock input
level unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output DC Offset V
S
= ±7.5V ±50 ±160 mV
Output DC Offset TempCo V
S
= ±5V –100 µV/°C
V
S
= ±7.5V –200 µV/°C
Input Impedance 913 kΩ
Output Impedance f
OUT
= 10kHz 2 Ω
Output Short-Circuit Current Source/Sink 3/1 mA
Clock Feedthrough Input = GND 200 µV
RMS
Maximum Clock Frequency V
S
= ±7.5V, 50% Duty Cycle (Note 3) 5 MHz
Power Supply Current V
S
= ±2.37V, f
CLK
= 1MHz ●11 22 mA
V
S
= ±5V, f
CLK
= 1MHz 14 23 mA
●26 mA
V
S
= ±7.5V, f
CLK
= 1MHz 17 28 mA
●32 mA
Power Supply Voltage Range ●±2.37 ±8V
Gain vs Frequency
Passband Phase Shift vs
Frequency Passband Group Delay
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: For tighter passband ripple specifications please consult with
LTC’s marketing.
Note 3: Not tested, guaranteed by design.
FREQUENCY (kHz)
220
200
180
160
140
120
100
80
60
40
20
0
GROUP DELAY (µs)
1064-4 G03
061012 14 16 18 20 2224 8
V
S
= ±7.5V
T
A
= 25°C
f
C
= 20kHz
f
CLK
= 1MHz, 50:1
FREQUENCY (kHz)
06
PHASE SHIFT (DEG)
–45
0
45
90
135
180
225
270
315
360
405
450
10 12 14 16 18 20 22
1064-4 G02
24 8
VS = ±7.5V
TA = 25°C
fC = 20kHz
fCLK = 1MHz, 50:1
FREQUENCY (Hz)
10k
GAIN (dB)
15
0
–15
–30
–45
–60
–75
–90
–105
100k 1M
1064-4 G01
VS = ±7.5V
TA = 25°C
fCLK = 2MHz, 50:1
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
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LTC1064-4
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Power Supply Current vs Power
Supply Voltage
Table 1. Wideband Noise (µVRMS). Input Grounded, fCLK = 1MHz
Gain vs Frequency with
Compensation Device to Device Phase Matching Total Harmonic Distortion
FREQUENCY (Hz)
10k
GAIN (dB)
5
0
–5
–10
–15
–20
–25
–30
–35
100k 1M
1064-4 G04
TA = 125°C
TA = 25°C
FOR COMPENSATION INFORMATION
SEE PIN DESCRIPTION SECTION
VS = ±7.5V
fCLK = 5MHz
RATIO = 50:1
INPUT LEVEL (V
RMS
)
0.1
0.01
DISTORTION (%)
0.1
1.0
110
1064-4 G06
V
S
= ±7.5V
V
S
= ±5V
V
S
= ±2.37V
f
CLK
= 1MHz, 50:1
f
CUTOFF
= 20kHz
FREQUENCY (kHz)
06
PHASE MATCH (±DEG)
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
10 12 14 16 18 20 22
1064-4 G05
24 8
V
S
= ±7.5V
f
C
= 20kHz
f
CLK
= 1MHz, 50:1
50 UNIT SAMPLE (T
A
= 25°C TO 125°C)
Transient Response
fCLK = 1MHz, Ratio = 50:1,
fC = 20kHz, VS = ±7.5V, 1kHz
Square Wave Input
TOTAL POWER SUPPLY VOLTAGE (V)
02 6 10 141822
POWER SUPPLY CURRENT (mA)
48
44
40
36
32
28
24
20
16
12
8
4
0481216
1064-4 G07
20 24
fCLK = 1MHz
TA = –55°C
TA = 25°C
TA = 125°C
2V/DIV
0.1ms/DIV
V
S
= ±2.37V V
S
= ±5V V
S
= ±7.5V
Noise Noise Noise
Pin 10 to f
CLK
/f
CUTOFF
µV
RMS
µV
RMS
µV
RMS
V
+
50:1 120 135 145
V
–
100:1 100 120 130
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC1064-4
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Table 2. Gain/Phase, Pin 10 at V+, Typical Response
fCUTOFF = 1kHz, VS = ±5V, TA = 25°C, fCLK = 50kHz, Ratio = 50:1
Table 3. Gain/Delay, Pin 10 at V+, Typical Response
fCUTOFF = 1kHz, VS = ±5V, TA = 25°C, fCLK = 50kHz, Ratio = 50:1
FREQUENCY(kHz) GAIN (dB) PHASE (deg)
0.200 – 0.075 –59.990
0.400 – 0.050 –122.400
0.600 0.020 169.300
0.800 0.060 88.500
1.000 0.090 –26.100
1.200 – 15.640 –175.100
1.400 – 34.700 126.500
1.600 – 51.700 87.600
1.800 – 68.600 38.400
2.000 – 84.110 –47.860
FREQUENCY(kHz) GAIN (dB) DELAY (ms)
0.200 – 0.074 0.844
0.300 – 0.070 0.867
0.400 – 0.050 0.899
0.500 – 0.020 0.949
0.600 0.020 1.021
0.700 0.050 1.122
0.800 0.060 1.275
0.900 0.120 1.592
1.000 0.090 2.160
1.100 – 5.020 2.070
1.200 – 15.650 1.288
Table 4. Gain/Phase, Pin 10 at V–, Typical Response
f–3dB = 1kHz, VS = ±5V, TA = 25°C, fCLK = 100kHz, Ratio = 100:1
FREQUENCY(kHz) GAIN (dB) PHASE (deg)
0.200 – 0.179 –60.090
0.400 – 0.440 –122.000
0.600 – 0.810 170.800
0.800 – 1.480 91.900
1.000 – 3.500 –16.300
1.200 – 17.720 –140.500
1.400 – 35.700 164.800
1.600 – 52.700 135.000
1.800 – 71.900 114.000
2.000 – 96.160 –49.670
Table 5. Gain/Delay, Pin 10 at V–, Typical Response
f–3dB = 1kHz, VS = ±5V, TA = 25°C, fCLK = 100kHz, Ratio = 100:1
Table 6. Gain/Phase, Pin 10 at GND
VS = ±5V, TA = 25°C
FREQUENCY(kHz) GAIN (dB) PHASE (deg)
0.200 – 0.383 –47.140
0.400 – 1.000 –92.000
0.600 – 1.300 –134.300
0.800 – 0.280 –178.800
1.000 2.670 109.200
1.200 – 3.500 6.000
1.400k – 12.510 –47.400
1.600 – 20.000 –88.800
1.800 – 27.300 –127.800
2.000 – 35.000 –164.200
FREQUENCY(kHz) GAIN (dB) DELAY (ms)
0.200 – 0.174 0.842
0.300 – 0.300 0.861
0.400 – 0.440 0.888
0.500 – 0.610 0.933
0.600 – 0.810 0.999
0.700 – 1.090 1.095
0.800 – 1.480 1.242
0.900 – 2.080 1.503
1.000 – 3.500 1.832
1.100 – 8.720 1.724
1.200 – 17.720 1.183
TYPICAL PERFOR A CE CHARACTERISTICS
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LTC1064-4
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TYPICAL PERFOR A CE CHARACTERISTICS
UW
FREQUENCY (kHz) GAIN (dB) PHASE (deg)
10.000 –0.094 –75.900
12.000 –0.100 –91.400
14.000 –0.090 –107.200
16.000 –0.080 –123.300
18.000 –0.060 –139.600
20.000 –0.040 –156.500
22.000 –0.020 –173.800
24.000 0.000 168.200
26.000 0.020 149.400
28.000 0.030 130.000
30.000 0.020 109.400
32.000 0.010 87.700
34.000 –0.020 64.600
36.000 –0.030 39.500
38.000 –0.010 11.400
40.000 –0.070 –22.000
42.000 –0.920 –64.100
44.000 –4.000 –110.100
46.000 –8.970 –147.000
48.000 –14.320 –173.500
50.000 –19.460 166.800
FREQUENCY (kHz) GAIN (dB) PHASE (deg)
10.000 –0.096 –32.390
20.000 –0.100 –64.900
30.000 –0.080 –98.100
40.000 –0.040 –132.300
50.000 0.020 –168.200
60.000 0.070 153.600
70.000 0.040 112.100
80.000 –0.120 66.400
90.000 –0.460 14.600
100.000 –1.310 –49.300
110.000 –5.640 –129.000
120.000 –14.530 167.800
130.000 –23.800 126.700
140.000 –32.600 96.200
150.000 –41.000 71.300
160.000 –49.200 49.200
170.000 –57.500 29.000
180.000 –66.500 9.800
190.000 –77.770 –2.320
200.000 –92.050 76.740
FREQUENCY (kHz) GAIN (dB) PHASE (deg)
110.000 –7.420 172.100
120.000 –18.240 119.400
130.000 –28.000 83.300
140.000 –37.000 54.000
150.000 –45.700 –27.600
160.000 –54.300 2.100
170.000 –63.300 –24.900
180.000 –73.610 –60.210
190.000 –85.300 –138.990
200.000 –83.390 129.580
Table 7. Gain/Phase for Figure 6.
Typical Response, Pin 10 at V+
, fCUTOFF = 40kHz,
VS = ±7.5V, fCLK = 2MHz, Ratio = 50:1
Table 8. Gain/Phase for Figure 7.
Typical Response, Pin 10 at V+
, fCUTOFF = 100kHz,
VS = ±7.5V, TA = 25°C, fCLK = 5MHz, Ratio = 50:1
Table 9. Gain/Phase for Figure 7.
Typical Response, Pin 10 at V+ fCUTOFF = 100kHz,
VS = ±7.5V, TA = 125°C, fCLK = 5MHz, Ratio = 50:1
FREQUENCY (kHz) GAIN (dB) PHASE (deg)
10.000 –0.071 –33.800
20.000 –0.040 –67.800
30.000 0.050 –102.500
40.000 0.190 –138.300
50.000 0.410 –176.100
60.000 0.670 143.100
70.000 0.920 98.400
80.000 1.150 48.200
90.000 1.530 –10.900
100.000 1.110 –96.500
LTC1064-4
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UU
U
PI FU CTIO S
INV C, COMP1, INV A, COMP2 (Pins 1, 6, 7 and 13): To
obtain a Cauer response with minimum passband ripple
and cutoff frequencies above 20kHz, compensating com-
ponents are required. Figure 6 uses ±7.5V power supplies
and compensation components to achieve up to 40kHz
sweepable
cutoff frequencies and ±0.1dB passband ripple.
Table 7 lists the typical amplitude response of Figure 6.
Figure 7 illustrates the compensation scheme required to
obtain a 100kHz cutoff frequency; Graph 4 and Tables 8
and 9 list the typical response of Figure 7 for 25°C and
125°C ambient temperature. As shown the ripple in-
creases at high temperatures but still a ±0.25dB figure
can be obtained for ambient temperatures below 70°C.
V
IN
, V
OUT
(Pins 2, 9): The input Pin 2 is connected to a 12k
resistor tied to the inverting input of an op amp. Pin 2 is
protected against static discharge. The device’s output,
Pin 9, is the output of an op amp which can typically
source/sink 3mA/1mA. Although the internal op amps are
unity gain stable, driving long coax cables is not recom-
mended.
When testing the device for noise and distortion, the
output, Pin 9, should be buffered (Figure 4).
The op amp
power supply wire (or trace) should be connected
directly to the power source.
To eliminate any output
clock feedthrough, Pin 9 should be buffered with a simple
R, C lowpass filter (Figure 5). The cutoff frequency of the
output filter should be f
CLK
/3.
AGND (Pins 3, 5): For dual supply operation these pins
should be connected to a ground plane. For single supply
operation both pins should be tied to one half supply
(Figure 2).
V
+
, V
–
(Pins 4, 12): Should be bypassed with a 0.1µF
capacitor to an adequate analog ground. Low noise,
nonswitching power supplies are recommended.
To avoid
latchup when the power supplies exhibit high turn-on
transients, a 1N5817 Schottky diode should be added
from the V
+
and V
–
pins to ground (Figures 1 and 2).
INV A, R(h, I) (Pins 7, 14): A very short connection
between Pin 7 and Pin 14 is recommended. This connec-
tion should be preferably done under the IC package. In a
breadboard, use a one inch, or less, shielded coaxial cable;
the shield should be grounded. In a PC board, use a one
inch trace or less; surround the trace by a ground plane.
NC (Pin 8 ): Pin 8 is not internally connected, it should be
preferably grounded.
50/100 Ratio (Pin 10): For an f
CLK
/f
C
ratio of 50:1,
Pin 10 should be tied to V
+
. For an f
CLK
/f
–3dB
ratio of
100:1, Pin 10 should be tied to V
–
. When Pin 10 is at
midsupplies (i.e. ground), the filter response is neither
Cauer nor transitional. Table 6 illustrates this response.
Bypassing Pin 10 with a 0.1µF capacitor reduces the
already small clock feedthrough.
(Pin Numbers Refer to the 14-Pin Package)
LTC1064-4
8
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Figure 3. Level Shifting the Input T2L Clock
for Single Supply Operation ≥6V.
Figure 4. Buffering the Filter Output. The Buffer Op Amp
Should Not Share the LTC1064-4 Power Lines.
Figure 5. Adding an Output Buffer-Filter to Eliminate Any Clock Feedthrough.
Passband Error of Output Buffer is ±0.1dB to 50kHz, –3dB at 94kHz.
LTC1064-4
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
+
1064-4 F03
0.1µF
5k
2.2k
5k
5k 1µF
T
2
L
LEVEL
V
+
1N5817
COMP2*
V
–
f
CLK
50/100
V
OUT
NC
INV C
V
IN
AGND
V
+
AGND
COMP1*
INV A
R(h, I)
V
IN
V
OUT
LTC1064-4
1
2
3
4
5
6
7
14
13
12
11
10
9
8
0.1µF0.1µF
0.1µF
0.1µF
VOUT
–
+
V–
V+
POWER SOURCE
10k
10k
1064-4 F04
RECOMMENDED OP AMPS:
LT1022, LT318, LT1056
V+/V–
8
4
COMP2*
V–
fCLK
50/100
VOUT
NC
INV C
VIN
AGND
V+
AGND
COMP1*
INV A
R(h, I)
VIN
LTC1064-4
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
+
V
+
/V
–
V
–
1064-4 F05
0.1µF
0.1µFV
OUT
–
+
LT1056
200pF
430pF
10k
4.99k 4.99k
50Ω
0.027µF
R(h, I)
COMP2*
V
–
f
CLK
50/100
V
OUT
NC
INV C
V
IN
AGND
V
+
AGND
COMP1*
INV A
V
IN
Figure 1. Using Schottky Diodes to Protect
the IC from Power Supply Spikes
Figure 2. Single Supply Operation. If Fast Power Up or Down
Transients are Expected, Use a 1N5817 Schottky Diode
Between Pin 4 and Pin 5.
LTC1064-4
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
+
V
–
1064-4 F01
0.1µF
0.1µF
1N5817
1N5817
V
+
/V
–
COMP2*
V
–
f
CLK
50/100
V
OUT
NC
INV C
V
IN
AGND
V
+
AGND
COMP1*
INV A
R(h, I)
V
IN
V
OUT
LTC1064-4
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
+
= 15V
1064-4 F02
0.1µF
0.1µF
5k
5k
V
+
/2
1N5817
0V TO 10V
COMP2*
V
–
f
CLK
50/100
V
OUT
NC
INV C
V
IN
AGND
V
+
AGND
COMP1*
INV A
R(h, I)
V
IN
V
OUT
TYPICAL APPLICATIO S
U
LTC1064-4
9
10644fb
U
PACKAGE DESCRIPTIO
J Package
14-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
J14 0801
.045 – .065
(1.143 – 1.651)
.100
(2.54)
BSC
.014 – .026
(0.360 – 0.660)
.200
(5.080)
MAX
.015 – .060
(0.381 – 1.524)
.125
(3.175)
MIN
.300 BSC
(7.62 BSC)
.008 – .018
(0.203 – 0.457) 0° – 15°
1234567
.220 – .310
(5.588 – 7.874)
.785
(19.939)
MAX
.005
(0.127)
MIN 14 11 891013 12
.025
(0.635)
RAD TYP
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
OBSOLETE PACKAGE
LTC1064-4
10
10644fb
N Package
14-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
U
PACKAGE DESCRIPTIO
N14 1002
.020
(0.508)
MIN
.120
(3.048)
MIN
.130 ± .005
(3.302 ± 0.127)
.045 – .065
(1.143 – 1.651)
.065
(1.651)
TYP
.018 ± .003
(0.457 ± 0.076)
.005
(0.125)
MIN
.255 ± .015*
(6.477 ± 0.381)
.770*
(19.558)
MAX
31 24567
8910
11
1213
14
.008 – .015
(0.203 – 0.381)
.300 – .325
(7.620 – 8.255)
.325 +.035
–.015
+0.889
–0.381
8.255
()
NOTE:
1. DIMENSIONS ARE INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
.100
(2.54)
BSC
LTC1064-4
11
10644fb
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-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
S16 (WIDE) 0502
NOTE 3
.398 – .413
(10.109 – 10.490)
NOTE 4
16 15 14 13 12 11 10 9
1
N
2345678
N/2
.394 – .419
(10.007 – 10.643)
.037 – .045
(0.940 – 1.143)
.004 – .012
(0.102 – 0.305)
.093 – .104
(2.362 – 2.642)
.050
(1.270)
BSC .014 – .019
(0.356 – 0.482)
TYP
0° – 8° TYP
NOTE 3
.009 – .013
(0.229 – 0.330)
.005
(0.127)
RAD MIN
.016 – .050
(0.406 – 1.270)
.291 – .299
(7.391 – 7.595)
NOTE 4
× 45°
.010 – .029
(0.254 – 0.737)
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
.420
MIN
.325 ±.005
RECOMMENDED SOLDER PAD LAYOUT
.045 ±.005
N
123 N/2
.050 BSC
.030 ±.005
TYP
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
U
PACKAGE DESCRIPTIO
LTC1064-4
12
10644fb
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINE AR TECHN O LOGY CORPORATION 1991
LW/TP 1202 1K REV B • PRINTED IN USA
Figure 6. Compensating LTC1064-4 for Passband
Ripple of ±0.1dB and fCUTOFF Sweeps to 40kHz.
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V+
1064-4 F06
1M
7.5V
0.1µF
–7.5V
0.1µF
5pF
5pF
453k
≤2MHz
LTC1064-4
COMP2*
V–
fCLK
50/100
VOUT
NC
INV C
VIN
AGND
V+
AGND
COMP1*
INV A
R(h, I)
VIN
VOUT
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V+
1064-4 F07
1M
7.5V
0.1µF
–7.5V
0.1µF
30pF
30pF
453k
5MHz
LTC1064-4
COMP2*
V–
fCLK
50/100
VOUT
NC
INV C
VIN
AGND
V+
AGND
COMP1*
INV A
R(h, I)
VIN
VOUT
Figure 7. Compensating LTC1064-4 for fCUTOFF = 100kHz,
Gain at fCUTOFF = –1.3dB, Table 8.
TYPICAL APPLICATIO S
U
PART NUMBER DESCRIPTION COMMENTS
LTC1069-1 8th Order Elliptic Lowpass S0-8 Package, Low Power
LTC1069-6 Single Supply, 8th Order Elliptic Lowpass S0-8 Package, Very Low Power
LTC1569-6 DC Accurate, 10th Order Lowpass Internal Precision Clock, Low Power, S0-8 Package
LTC1569-7 DC Accurate, 10th Order Lowpass Internal Precision Clock, Delay Equalized, S0-8 Package
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