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LTC1064-4 Low Noise, 8th Order, Clock Sweepable Cauer Lowpass Filter
FEATURES

DESCRIPTIO

8th Order Filter in a 14-Pin Package 80dB or More Stopband Attenuation at 2 x fCUTOFF 50:1, fCLK to fCUTOFF Ratio (Cauer) 100:1, fCLK to f-3dB Ratio (Transitional) 135VRMS Total Wideband Noise 0.03% THD or Better 100kHz Maximum fCUTOFF Frequency Operates up to 8V Power Supplies Input Frequency Range up to 50 Times the Filter Cutoff Frequency
APPLICATIO S

The LTC(R)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 fCLK to fCUTOFF ratio is 50:1; the filter has a Cauer response and with compensation the passband ripple is 0.1dB. The stopband attenuation is 80dB at 2 x fCUTOFF. Cutoff frequencies up to 100kHz can be achieved. With Pin 10 at V -, the fCLK to f -3dB ratio is 100:1, the filter has a transitional ButterworthCauer response with lower noise and lower delay nonlinearity than the Cauer response. The stopband attenuation at 2.5 x 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 3VRMS 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 LTCMOSTM silicon gate process.
Antialiasing Filters Telecom Filters Sinewave Generators
, LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
1 VIN 2 3 8V 0.1F INV C VIN R(h, I) COMP2*
8th Order Clock Sweepable Lowpass Elliptic Filter
14 13 -8V 0.1F
20 0 -20 -40 -60
Frequency Response
TA = 25C fCLK = 5MHz, 50:1 CCOMP1 = 30pF, CCOMP2 = 18pF
12 V- AGND 4 + LTC1064-4 11 CLOCK fCLK V (TTL, 5MHz) 5 10 + - 50/100 AGND V /V 6 7 COMP1* INV A VOUT NC 9 8 VOUT
VOUT/VIN (dB)
fCLK = 2MHz, 50:1 -80 -100 fCLK = 1MHz, 100:1 1k 10k 100k FREQUENCY (Hz) 1M
1064-4 TA01b
1064 TA01
* FOR FREQUENCIES ABOVE 20kHz AND MINIMUM PASSBAND RIPPLE REFER TO THE PIN DESCRIPTION SECTION FOR COMPENSATION GUIDELINES. NOTE:THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1F CAPACITOR CLOSE TO THE PACKAGE. BYPASSING PIN 10 WITH 0.1F CAPACITOR REDUCES CLOCK FEEDTHROUGH. THE CONNECTION BETWEEN PINS 7 AND 14 SHOULD BE PHYSICALLY DONE UNDER THE PACKAGE.
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LTC1064-4
ABSOLUTE AXI U RATI GS
Total Supply Voltage (V + to V -) ............................ 16.5V Input Voltage at Any Pin ...... V - -0.3V VIN V + +0.3V Power Dissipation .............................................. 400mW Storage Temperature Range ................. - 65C to 150C
PACKAGE/ORDER I FOR ATIO
TOP VIEW INV C VIN AGND V+ AGND COMP1 INV A 1 2 3 4 5 6 7 14 R(h, I) 13 COMP2
- 12 V
ORDER PART NUMBER
INV C 1
LTC1064-4CN
11 fCLK 10 RATIO 9 8 VOUT NC
N PACKAGE 14-LEAD PDIP TJMAX = 110C, JA = 70C/W J PACKAGE 14-LEAD CERDIP
OBSOLETE PACKAGE
Consider the N14 Package for Alternate Source
LTC1064-4MJ LTC1064-4CJ
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER Passband Gain Gain TempCo Passband Edge Frequency, fC Gain at f C -3dB Frequency Passband Ripple (Note 2) Stopband Attenuation Stopband Attenuation Input Frequency Range Output Voltage Swing and Operating Input Voltage Range Total Harmonic Distortion Wideband Noise CONDITIONS
The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 7.5V, 50:1, f CLK = 1MHz, f C = 20kHz, R1 = 10k, TTL clock input level unless otherwise specified.
MIN
Referenced to 0dB, 1Hz to 0.05fCUTOFF
Referenced to Passband Gain, f C = 20kHz 50:1 (Cauer Response) 100:1 (Transitional Response) 0.1fC to 0.95fC Referenced to Passband Gain At 1.7f CUTOFF At 2f CUTOFF 50:1, Pin 10 at V + 100:1, Pin 10 at V - VS = 2.37V VS = 5V VS = 7.5V VS = 5V, Input = 1VRMS at 1kHz VS = 7.5V, Input = 3VRMS at 1kHz VS = 5V, Input = GND 1Hz to 999kHz VS = 7.5V, Input = GND 1Hz to 999kHz
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(Note 1)
Lead Temperature (Soldering, 10 sec).................. 300C Operating Temperature Range LTC1064-4M (OBSOLETE) ............... - 55C to 125C LTC1064-4C ....................................... - 40C to 85C
TOP VIEW 16 R(h, I) 15 COMP2 14 V-
ORDER PART NUMBER LTC1064-4CSW
VIN 2 AGND 3 V+ 4 AGND 5 NC 6 COMP1 7 INV A 8
13 NC 12 fCLK 11 RATIO 10 NC 9 VOUT
SW PACKAGE 16-LEAD PLASTIC (WIDE) SO TJMAX = 150C, JA = 90C/W
TYP 0.0002 20 1%
MAX 0.1
UNITS dB dB/C kHz dB kHz kHz dB dB dB kHz kHz V V V
-0.5
-0.4 21.5 10
0.7

-0.15 -56 0 0
0.6 -60 -80 fCLK fCLK/2

1.1 3.1 5.0 0.015 0.03 120 135
% % VRMS VRMS
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LTC1064-4
ELECTRICAL CHARACTERISTICS
PARAMETER Output DC Offset Output DC Offset TempCo Input Impedance Output Impedance Output Short-Circuit Current Clock Feedthrough Maximum Clock Frequency Power Supply Current f OUT = 10kHz Source/Sink Input = GND CONDITIONS VS = 7.5V VS = 5V VS = 7.5V
The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 7.5V, 50:1, f CLK = 1MHz, f C = 20kHz, R1 = 10k, TTL clock input level unless otherwise specified.
MIN TYP 50 -100 -200 9 13 2 3/1 200 5

MAX 160
UNITS mV V/C V/C k mA VRMS MHz mA mA mA mA mA V
VS = 7.5V, 50% Duty Cycle (Note 3) VS = 2.37V, f CLK = 1MHz VS = 5V, f CLK = 1MHz VS = 7.5V, f CLK = 1MHz
11 14 17
22 23 26 28 32 8
Power Supply Voltage Range Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
2.37
Note 2: For tighter passband ripple specifications please consult with LTC's marketing. Note 3: Not tested, guaranteed by design.
TYPICAL PERFOR A CE CHARACTERISTICS
Gain vs Frequency
15 0 -15 VS = 7.5V TA = 25C fCLK = 2MHz, 50:1
-45 0 45 90 135 180 225 270 315 360 405 450 VS = 7.5V TA = 25C fC = 20kHz f CLK = 1MHz, 50:1 GROUP DELAY (s)
PHASE SHIFT (DEG)
GAIN (dB)
-30 -45 -60 -75 -90
-105 10k
100k FREQUENCY (Hz)
UW
1064-4 G01
Passband Phase Shift vs Frequency
220 200 180 160 140 120 100 80 60 40 20 0
0 2 4 6 8 10 12 14 16 18 20 22 FREQUENCY (kHz)
1064-4 G02
Passband Group Delay
VS = 7.5V TA = 25C fC = 20kHz f CLK = 1MHz, 50:1
1M
0
2
4
6
8 10 12 14 16 18 20 22 FREQUENCY (kHz)
1064-4 G03
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LTC1064-4 TYPICAL PERFOR A CE CHARACTERISTICS
Gain vs Frequency with Compensation
5 TA = 125C 0 -5 TA = 25C
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 VS = 7.5V fC = 20kHz f CLK = 1MHz, 50:1 50 UNIT SAMPLE (TA = 25C TO 125C)
DISTORTION (%)
GAIN (dB)
-10 -15 -20 -25 -30 VS = 7.5V fCLK = 5MHz RATIO = 50:1 FOR COMPENSATION INFORMATION SEE PIN DESCRIPTION SECTION 100k FREQUENCY (Hz) 1M
1064-4 G04
-35 10k
Power Supply Current vs Power Supply Voltage
48 44 fCLK = 1MHz
POWER SUPPLY CURRENT (mA)
40 36 32 28 20 16 12 8 4 0 0 2 4 6 8 10 12 14 16 18 20 22 24 TOTAL POWER SUPPLY VOLTAGE (V)
1064-4 G07
TA = 25C TA = 125C
2V/DIV
24
4
UW
V+ V-
Device to Device Phase Matching
1.0
Total Harmonic Distortion
fCLK = 1MHz, 50:1 f CUTOFF = 20kHz
VS = 5V 0.1 VS = 2.37V
VS = 7.5V 0.01 0.1 1 INPUT LEVEL (VRMS) 10
1064-4 G06
0
2
4
6
8 10 12 14 16 18 20 22 FREQUENCY (kHz)
1064-4 G05
Transient Response fCLK = 1MHz, Ratio = 50:1, fC = 20kHz, VS = 7.5V, 1kHz Square Wave Input
TA = -55C
0.1ms/DIV
Table 1. Wideband Noise (VRMS). Input Grounded, fCLK = 1MHz
VS = 2.37V Pin 10 to fCLK /f CUTOFF 50:1 100:1 Noise VRMS 120 100 VS = 5V Noise VRMS 135 120 VS = 7.5V Noise VRMS 145 130
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LTC1064-4 TYPICAL PERFOR A CE CHARACTERISTICS
Table 2. Gain/Phase, Pin 10 at V +, Typical Response f CUTOFF = 1kHz, VS = 5V, TA = 25C, fCLK = 50kHz, Ratio = 50:1
FREQUENCY(kHz) 0.200 0.400 0.600 0.800 1.000 1.200 1.400 1.600 1.800 2.000 GAIN (dB) - 0.075 - 0.050 0.020 0.060 0.090 - 15.640 - 34.700 - 51.700 - 68.600 - 84.110 PHASE (deg) -59.990 -122.400 169.300 88.500 -26.100 -175.100 126.500 87.600 38.400 -47.860
Table 3. Gain/Delay, Pin 10 at V +, Typical Response f CUTOFF = 1kHz, VS = 5V, TA = 25C, fCLK = 50kHz, Ratio = 50:1
FREQUENCY(kHz) 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000 1.100 1.200 GAIN (dB) - 0.074 - 0.070 - 0.050 - 0.020 0.020 0.050 0.060 0.120 0.090 - 5.020 - 15.650 DELAY (ms) 0.844 0.867 0.899 0.949 1.021 1.122 1.275 1.592 2.160 2.070 1.288
Table 5. Gain/Delay, Pin 10 at V -, Typical Response f -3dB = 1kHz, VS = 5V, TA = 25C, fCLK = 100kHz, Ratio = 100:1
FREQUENCY(kHz) 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000 1.100 1.200 GAIN (dB) - 0.174 - 0.300 - 0.440 - 0.610 - 0.810 - 1.090 - 1.480 - 2.080 - 3.500 - 8.720 - 17.720 DELAY (ms) 0.842 0.861 0.888 0.933 0.999 1.095 1.242 1.503 1.832 1.724 1.183
UW
Table 4. Gain/Phase, Pin 10 at V -, Typical Response f -3dB = 1kHz, VS = 5V, TA = 25C, fCLK = 100kHz, Ratio = 100:1
FREQUENCY(kHz) 0.200 0.400 0.600 0.800 1.000 1.200 1.400 1.600 1.800 2.000 GAIN (dB) - 0.179 - 0.440 - 0.810 - 1.480 - 3.500 - 17.720 - 35.700 - 52.700 - 71.900 - 96.160 PHASE (deg) -60.090 -122.000 170.800 91.900 -16.300 -140.500 164.800 135.000 114.000 -49.670
Table 6. Gain/Phase, Pin 10 at GND VS = 5V, TA = 25C
FREQUENCY(kHz) 0.200 0.400 0.600 0.800 1.000 1.200 1.400k 1.600 1.800 2.000 GAIN (dB) - 0.383 - 1.000 - 1.300 - 0.280 2.670 - 3.500 - 12.510 - 20.000 - 27.300 - 35.000 PHASE (deg) -47.140 -92.000 -134.300 -178.800 109.200 6.000 -47.400 -88.800 -127.800 -164.200
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LTC1064-4 TYPICAL PERFOR A CE CHARACTERISTICS
Table 7. Gain/Phase for Figure 6. Typical Response, Pin 10 at V+, f CUTOFF = 40kHz, VS = 7.5V, fCLK = 2MHz, Ratio = 50:1
FREQUENCY (kHz) 10.000 12.000 14.000 16.000 18.000 20.000 22.000 24.000 26.000 28.000 30.000 32.000 34.000 36.000 38.000 40.000 42.000 44.000 46.000 48.000 50.000 GAIN (dB) -0.094 -0.100 -0.090 -0.080 -0.060 -0.040 -0.020 0.000 0.020 0.030 0.020 0.010 -0.020 -0.030 -0.010 -0.070 -0.920 -4.000 -8.970 -14.320 -19.460 PHASE (deg) -75.900 -91.400 -107.200 -123.300 -139.600 -156.500 -173.800 168.200 149.400 130.000 109.400 87.700 64.600 39.500 11.400 -22.000 -64.100 -110.100 -147.000 -173.500 166.800
FREQUENCY (kHz) 10.000 20.000 30.000 40.000 50.000 60.000 70.000 80.000 90.000 100.000
GAIN (dB) -0.071 -0.040 0.050 0.190 0.410 0.670 0.920 1.150 1.530 1.110
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UW
Table 8. Gain/Phase for Figure 7. Typical Response, Pin 10 at V+, f CUTOFF = 100kHz, VS = 7.5V, TA = 25C, fCLK = 5MHz, Ratio = 50:1
FREQUENCY (kHz) 10.000 20.000 30.000 40.000 50.000 60.000 70.000 80.000 90.000 100.000 110.000 120.000 130.000 140.000 150.000 160.000 170.000 180.000 190.000 200.000 GAIN (dB) -0.096 -0.100 -0.080 -0.040 0.020 0.070 0.040 -0.120 -0.460 -1.310 -5.640 -14.530 -23.800 -32.600 -41.000 -49.200 -57.500 -66.500 -77.770 -92.050 PHASE (deg) -32.390 -64.900 -98.100 -132.300 -168.200 153.600 112.100 66.400 14.600 -49.300 -129.000 167.800 126.700 96.200 71.300 49.200 29.000 9.800 -2.320 76.740
Table 9. Gain/Phase for Figure 7. Typical Response, Pin 10 at V+ f CUTOFF = 100kHz, VS = 7.5V, TA = 125C, fCLK = 5MHz, Ratio = 50:1
PHASE (deg) -33.800 -67.800 -102.500 -138.300 -176.100 143.100 98.400 48.200 -10.900 -96.500 FREQUENCY (kHz) 110.000 120.000 130.000 140.000 150.000 160.000 170.000 180.000 190.000 200.000 GAIN (dB) -7.420 -18.240 -28.000 -37.000 -45.700 -54.300 -63.300 -73.610 -85.300 -83.390 PHASE (deg) 172.100 119.400 83.300 54.000 -27.600 2.100 -24.900 -60.210 -138.990 129.580
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LTC1064-4
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 components 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 25C and 125C ambient temperature. As shown the ripple increases at high temperatures but still a 0.25dB figure can be obtained for ambient temperatures below 70C. VIN, VOUT (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 recommended. 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.
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(Pin Numbers Refer to the 14-Pin Package)
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 0.1F 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 connection 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 0.1F capacitor reduces the already small clock feedthrough.
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LTC1064-4
TYPICAL APPLICATIO S
1 VIN 2 INV C VIN R(h, I) 14 VIN V- 1N5817 V +/V - VOUT 0.1F 5k 0.1F V+= 15V 0.1F 5k 1N5817 V+/2 1 2 INV C VIN R(h, I) 14 13 COMP2* LTC1064-4 3 12 V- AGND 4 0.1F 5 6 V+ AGND COMP1* fCLK 50/100 VOUT NC
1064-4 F01
V+ 1N5817
7 INV A
Figure 1. Using Schottky Diodes to Protect the IC from Power Supply Spikes
1 VIN 2
INV C VIN
R(h, I) 14 V+ 2.2k T2L LEVEL 5k 1F VOUT
VIN
13 COMP2* LTC1064-4 3 12 V- AGND 4 5k 5 6 V+ AGND COMP1* fCLK 50/100 VOUT NC 11 10 9 8
V+ 1N5817
0.1F
5k
7 INV A
Figure 3. Level Shifting the Input T2L Clock for Single Supply Operation 6V.
VIN
V+ 0.1F
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.
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11 10 9 8
1 2 4 5 6 7
13 COMP2* LTC1064-4 3 12 V- AGND 4 5 6 V+ AGND COMP1* fCLK 50/100 VOUT NC
1064-4 F02
11 10 9 8
0V TO 10V
VOUT
7 INV A
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.
1 2
INV C VIN
R(h, I) 14
POWER SOURCE V+ V-
13 COMP2* LTC1064-4 3 12 AGND V- 4 0.1F 5 6 V+ AGND COMP1* fCLK 50/100 VOUT NC 11 10 + - V /V 9 8 10k 0.1F 10k 0.1F
- +
4
8 VOUT
7 INV A
1064-4 F03
RECOMMENDED OP AMPS: LT1022, LT318, LT1056
1064-4 F04
0.1F
Figure 4. Buffering the Filter Output. The Buffer Op Amp Should Not Share the LTC1064-4 Power Lines.
14
INV C VIN
R(h, I)
13 COMP2* LTC1064-4 3 12 V- AGND V+ AGND COMP1* INV A fCLK 50/100 VOUT NC 11 10 + - V /V 9 8 4.99k
V- 0.1F 200pF 10k VOUT
4.99k
-
LT1056
50 0.027F
1064-4 F05
430pF
+
LTC1064-4
PACKAGE DESCRIPTIO
.300 BSC (7.62 BSC)
.008 - .018 (0.203 - 0.457)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS
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J Package 14-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
.785 (19.939) MAX 14 13 12 11 10 9 8 .005 (0.127) MIN .025 (0.635) RAD TYP .220 - .310 (5.588 - 7.874) 1 2 3 4 5 6 7 .200 (5.080) MAX .015 - .060 (0.381 - 1.524) 0 - 15 .045 - .065 (1.143 - 1.651) .014 - .026 (0.360 - 0.660) .100 (2.54) BSC .125 (3.175) MIN
J14 0801
OBSOLETE PACKAGE
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LTC1064-4
PACKAGE DESCRIPTIO U
N Package 14-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
.770* (19.558) MAX 14 13 12 11 10 9 8 .255 .015* (6.477 0.381) 1 .300 - .325 (7.620 - 8.255) .130 .005 (3.302 0.127) .020 (0.508) MIN .008 - .015 (0.203 - 0.381) +.035 .325 -.015 .005 (0.125) .100 MIN (2.54) BSC 2 3 4 5 6 7 .045 - .065 (1.143 - 1.651) .065 (1.651) TYP .120 (3.048) MIN .018 .003 (0.457 0.076)
N14 1002
(
+0.889 8.255 -0.381
)
INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
NOTE: 1. DIMENSIONS ARE
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LTC1064-4
PACKAGE DESCRIPTIO
.030 .005 TYP N
.420 MIN
1
2
3
RECOMMENDED SOLDER PAD LAYOUT 1 .291 - .299 (7.391 - 7.595) NOTE 4 .010 - .029 x 45 (0.254 - 0.737)
0 - 8 TYP
.005 (0.127) RAD MIN
.009 - .013 (0.229 - 0.330)
NOTE 3 .016 - .050 (0.406 - 1.270)
NOTE: 1. DIMENSIONS IN
INCHES (MILLIMETERS) 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)
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.
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SW Package 16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
.050 BSC .045 .005 .398 - .413 (10.109 - 10.490) NOTE 4 16 15 14 13 12 11 10 9 N .325 .005 NOTE 3 .394 - .419 (10.007 - 10.643) N/2 N/2 2 3 4 5 6 7 8 .093 - .104 (2.362 - 2.642) .037 - .045 (0.940 - 1.143) .050 (1.270) BSC .004 - .012 (0.102 - 0.305) .014 - .019 (0.356 - 0.482) TYP
S16 (WIDE) 0502
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LTC1064-4
TYPICAL APPLICATIO S
5pF 30pF 1 2 R(h, I) 14 1M 1 VIN -7.5V 2MHz 0.1F 7.5V 0.1F VOUT 453k 2 R(h, I) 14 1M
INV C VIN
VIN
13 COMP2* LTC1064-4 3 12 AGND V- 4 0.1F 5 6 453k V+ AGND COMP1* fCLK 50/100 VOUT NC
1064-4 F06
7.5V
7 INV A
5pF
Figure 6. Compensating LTC1064-4 for Passband Ripple of 0.1dB and fCUTOFF Sweeps to 40kHz.
RELATED PARTS
PART NUMBER LTC1069-1 LTC1069-6 LTC1569-6 LTC1569-7 DESCRIPTION 8th Order Elliptic Lowpass Single Supply, 8th Order Elliptic Lowpass DC Accurate, 10th Order Lowpass DC Accurate, 10th Order Lowpass COMMENTS S0-8 Package, Low Power S0-8 Package, Very Low Power Internal Precision Clock, Low Power, S0-8 Package Internal Precision Clock, Delay Equalized, S0-8 Package
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507
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9 8
INV C VIN
13 COMP2* LTC1064-4 3 12 AGND V- 4 5 6 V+ AGND COMP1* fCLK 50/100 VOUT NC
1064-4 F07
-7.5V 5MHz V+ VOUT 0.1F
11
11 10 9 8
10 + V
7 INV A
30pF
Figure 7. Compensating LTC1064-4 for fCUTOFF = 100kHz, Gain at fCUTOFF = -1.3dB, Table 8.
10644fb LW/TP 1202 1K REV B * PRINTED IN USA
www.linear.com
LINEAR TECHNOLOGY CORPORATION 1991

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