TC fd Hz th Order Butterworth Lowpass Filter Filter Amplitude Response and Noise Lowpass Filter with No DC Error Low Passband Noise Operates DC to kHz Operates On a Single V Supply or Up to V th Orde
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TC fd Hz th Order Butterworth Lowpass Filter Filter Amplitude Response and Noise Lowpass Filter with No DC Error Low Passband Noise Operates DC to kHz Operates On a Single V Supply or Up to V th Orde

Its unusual architecture puts the filter outside the DC path so DC offset and low frequency noise problems are eliminated This makes the LTC1062 very useful for lowpass filters where DC accuracy is important The filter input and output are simultane

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TC fd Hz th Order Butterworth Lowpass Filter Filter Amplitude Response and Noise Lowpass Filter with No DC Error Low Passband Noise Operates DC to kHz Operates On a Single V Supply or Up to V th Orde




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Presentation on theme: "TC fd Hz th Order Butterworth Lowpass Filter Filter Amplitude Response and Noise Lowpass Filter with No DC Error Low Passband Noise Operates DC to kHz Operates On a Single V Supply or Up to V th Orde"— Presentation transcript:


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TC1062 1062fd 10Hz 5th Order Butterworth Lowpass Filter Filter Amplitude Response and Noise Lowpass Filter with No DC Error Low Passband Noise Operates DC to 20kHz Operates On a Single 5V Supply or Up to 8V 5th Order Filter Maximally Flat Response Internal or External Clock Cascadable for Faster Rolloff Buffer Available The LTC 1062 is a 5th order all pole maximally flat lowpass filter with no DC error. Its unusual architecture puts the filter outside the DC path so DC offset and low frequency noise problems are eliminated. This makes the LTC1062 very useful for lowpass

filters where DC accuracy is important. The filter input and output are simultaneously taken across an external resistor. The LTC1062 is coupled to the signal through an external capacitor. This RC reacts with the internal switched capacitor network to form a 5th order rolloff at the output. The filter cutoff frequency is set by an internal clock that can be externally driven. The clock-to-cutoff frequency ratio is typically 100:1, allowing the clock ripple to be easily removed. Two LTC1062s can be cascaded to form a 10th order quasi max flat lowpass filter. The device can be operated with

single or dual supplies ranging from 2.5V to 9V. The LTC1062 is manufactured using Linear Technology’s enhanced LTCMOS TM silicon gate process. 60Hz Lowpass Filters Antialiasing Filter Low Level Filtering Rolling Off AC Signals from High DC Voltages Digital Voltmeters Scales Strain Gauges LTCMOS is a trademark of Linear Technology Corporation. FB AGND DIVIDER RATIO OUT OUT OSC LTC1 062 OSC= 3900pF 1062 TA01 IN 25.8k = 5V = –5V DC ACCURATE OUTPUT BUFFERED OUTPUT NOTE: TO ADJUST OSCILLATOR FREQUENCY, USE A 6800pF CAPACITOR IN SERIES WITH A 50k POT FROM PIN 5 TO GROUND INPUT FREQUENCY (Hz) –100

AMPLITUDE RESPONSE (dB) –80 –60 –40 –20 10 100 1062 TA02 –90 –70 –50 FILTER OUTPUT NOISE ( V/ Hz) 20 40 10 30 50 –30 –10 OSC = 3900pF FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO , LTC and LT are registered trademarks of Linear Technology Corporation. 5th Order Lowpass Filter
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TC1062 1062fd Total Supply Voltage (V to V ............................... 18V Input Voltage at Any Pin ..... V – 0.3V V IN V + 0.3V Operating Temperature Range LTC1062M (OBSOLETE) ............. –55 C T 125 LTC1062C ................................... –40 C T 85 Storage Temperature Range

................. –65 C to 150 Lead Temperature (Soldering, 10 sec)................. 300 (Note 1) The denotes specifications which apply over the full operating tempera- ture range, otherwise specifications are at T A = 25 C. V = 5V, V = –5V, unless otherwise specified. AC output measured at Pin 7, Figure 1. Consult LTC Marketing for parts specified with wider operating temperature ranges. PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply Current C OSC (Pin 5 to V , Pin 11 in SW16) = 100pF 4.5 7 mA 10 mA Input Frequency Range 0 to 20 kHz Filter Gain at f IN = 0 f CLK = 100kHz, Pin 4 (Pin 6

in SW16) at V , 0.00 dB IN = 0.5f (Note 2) C = 0.01 F, R = 25.78k –0.02 –0.3 dB IN = f –2 –3.00 dB IN = 2f –2 8 30.00 dB IN = 4f –5 2 60.00 dB Clock-to-Cutoff Frequency Ratio, f CLK /f CLK = 100kHz, Pin 4 (Pin 6 in SW16) at V ,1 00 1% C = 0.01 F, R = 25.78k Filter Gain at f IN = 16kHz f CLK = 400kHz, Pin 4 at V , C = 0.01 F, R = 6.5k –43 –52 dB CLK /f Tempco f CLK = 400kHz, Pin 4 at V , C = 0.01 F, R = 6.5k 10 ppm/ Filter Output (Pin 7, Pin 13 in SW16) DC Swing Pin 7/Pin13 (SW16) Buffered with an External Op Amp 3.5 3.8 V Clock Feedthrough 1mV P-P PACKAGE/ORDER I FOR ATIO UU ORDER PART NUMBER

LTC1062CN8 J MAX = 100 C, JA = 130 C/W J MAX = 150 C, JA = 90 C/W LTC1062CSW ORDER PART NUMBER TOP VIEW SW PACKAGE 16-LEAD PLASTIC SO 16 15 14 13 12 11 10 NC NC FB AGND V NC NC NC NC OUT OUT OSC NC NC DIVIDER RATIO TOP VIEW FB AGND DIVIDER RATIO OUT OUT OSC N8 PACKAGE 8-LEAD PDIP J8 PACKAGE 8-LEAD CERDIP J MAX = 150 C, JA = 100 C/W LTC1062MJ8 LTC1062CJ8 OBSOLETE PACKAGE Consider the N8 Package as an Alternate Source ELECTRICAL CHARACTERISTICS ABSOLUTE AXI U RATI GS WW
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TC1062 1062fd The denotes specifications which apply over the full operating tempera- ture range, otherwise

specifications are at T A = 25 C. V = 5V, V = –5V, unless otherwise specified, AC output measured at Pin 7, Figure 1. PARAMETER CONDITIONS MIN TYP MAX UNITS Internal Buffer Bias Current 250 pA 170 1000 pA Offset Voltage 220 mV Voltage Swing R LOAD = 20k 3.5 3.8 V Short-Circuit Current Source/Sink 40/3 mA Clock (Note 3) Internal Oscillator Frequency C OSC (Pin 5 to V , Pin 11 in SW16) = 100pF 25 32 50 kHz 15 65 kHz Max Clock Frequency MHz Pin 5 (Pin 11 in SW16) Source or Sink Current 40 80 Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note

2: f is the frequency where the gain is –3dB with respect to the input signal. Note 3: The external or driven clock frequency is divided by either 1, 2 or 4 depending upon the voltage at Pin 4. For the N8 package, when Pin 4 = V ratio = 1; when Pin 4 = GND, ratio = 2; when Pin 4 = V , ratio = 4. Amplitude Response Normalized to the Cutoff Frequency IN /f 0.1 –100 RESPONSE (dB) –80 –60 –40 –20 110 1062 G01 –90 –70 –50 –30 –10 RC = 2.5V = 25 1.62 CLK = 500kHz, f = 5kHz CLK = 250kHz, f = 2.5kHz CLK = 100kHz, f = 1kHz CLK = 1kHz, f = 10Hz CLK = 10kHz, f = 100Hz IN /f 0.1 –100 RESPONSE (dB) –80 –60

–40 –20 110 1062 G01 –90 –70 –50 –30 –10 RC = 2.5V = 25 1.62 CLK = 500kHz, f = 5kHz CLK = 250kHz, f = 2.5kHz CLK = 100kHz, f = 1kHz CLK = 1kHz, f = 10Hz CLK = 10kHz, f = 100Hz IN /f –1.0 0.4 0.6 0.8 0.4 0.2 0.2 1062 G03 PASSBAND GAIN (dB) 0.1 0.2 0.4 0.6 0.8 = 5V = 25 CLK = 100kHz RC 1.6 RC 1.62 RC 1.64 Amplitude Response Normalized to the Cutoff Frequency Passband Gain vs Input Frequency ELECTRICAL CHARACTERISTICS TYPICAL PERFOR A CE CHARACTERISTICS UW
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TC1062 1062fd Passband Gain vs Input Frequency and Temperature Passband Phase Shift vs Input Frequency Filter Noise Spectral

Density IN /f –1.0 0.4 0.6 0.8 0.4 0.2 0.2 1062 G04 PASSBAND GAIN (dB) 0.1 0.2 0.4 0.6 0.8 = 5V CLK = 100kHz RC 1.62 = 125 = –55 IN /f 210 –120 –150 –180 –30 –60 –90 1062 G05 PHASE SHIFT (DEG) 0.1 0.2 0.4 0.6 0.8 = 5V CLK = 100kHz RC 1.62 = 25 CUTOFF FREQUENCY (Hz) 20 FILTER OUTPUT NOISE ( V/ Hz) 30 50 70 80 0.1 10 100 10k 1062 G06 10 1k 60 40 = 5V = 25 = 10Hz = 1kHz = 100Hz Normalized Oscillator Frequency, OSC vs Supply Voltage Oscillator Frequency, f OSC vs Ambient Temperature SUPPLY (V) OSCILLATOR FREQUENCY NORMALIZED TO f OSC AT 5V SUPPLY 1.1 1.2 1.3 20 1062 G07 1.0 0.9 0.7 12 16 18 10 14

0.8 1.6 1.5 1.4 AMBIENT TEMPERATURE ( C) –50 60 OSCILLATOR FREQUENCY (kHz) 80 120 140 160 260 200 50 75 1062 G08 100 220 240 180 –25 25 100 125 OSC = 0pF = 10V = 0V = 5V = 0V Power Supply Current vs Power Supply Voltage POWER SUPPLY VOLTAGE (V) SUPPLY CURRENT (mA) 12 20 1062 G09 12 16 10 14 18 16 10 14 = –55 = 25 = 125 TYPICAL PERFOR A CE CHARACTERISTICS UW
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TC1062 1062fd SWITCHED CAPACITOR NETWORK CLOCK GEN 1, 2, 4 OSC OUT OUT OSC 1062 BD AGND FB CLK BY CONNECTING PIN 4 TO V , AGND OR V , THE OUTPUT FREQUENCY OF THE INTERNAL CLOCK GENERATOR IS THE OSCILLATOR FREQUENCY DI-

VIDED BY 1, 2, 4. THE (f CLK /f ) RATIO OF 100:1 IS WITH RESPECT TO THE INTERNAL CLOCK GENERA- TOR OUTPUT FREQUENCY. PIN 5 CAN BE DRIVEN WITH AN EXTERNAL CMOS LEVEL CLOCK. THE LTC1062 CAN ALSO BE SELF-CLOCKED BY CON- NECTING AN EXTERNAL CAPACITOR (C OSC ) TO GROUND (OR TO V IF C OSC IS POLARIZED). UNDER THIS CONDITION AND WITH 5V SUPPLIES, THE INTERNAL OSCILLATOR FREQUENCY IS: OSC 140kHz [33pF/(33pF + C OSC )] AC TEST CIRCUIT FB AGND DIVIDER RATIO OUT OUT OSC TC1062 0.1 MEASURED OUTPUT 0.1 1062 F01 C = 0.01 IN R = 25.8k 50 5V –5V –5V 5V CLK = 100kHz 5V = –5V TC1052 RC FOR BEST MAX FLAT

APPROXIMATION, THE INPUT RC SHOULD BE SUCH AS: A 0.5k RESISTOR, R , SHOULD BE USED IF THE BIPOLAR EXTERNAL CLOCK IS APPLIED BEFORE THE POWER SUPPLIES TURN ON 1.63 CLK 100 For Adjusting Oscillator Frequency, Insert a 50k Pot in Series with C OSC . Use Two Times Calculated C OSC Figure 1 BLOCK DIAGRA
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TC1062 1062fd Filter Input Voltage Range Every node of the LTC1062 typically swings within 1V of either voltage supply, positive or negative. With the appro- priate external (RC) values, the amplitude response of all the internal or external nodes does not exceed a gain of 0dB with

the exception of Pin 1. The amplitude response of the feedback node (Pin 1) is shown in Figure 2. For an input frequency around 0.8 • f , the gain is 1.7V/V and, with 5V supplies, the peak-to-peak input voltage should not exceed 4.7V. If the input voltage goes beyond this value, clipping and distortion of the output waveform occur, but the filter will not get damaged nor will it oscillate. Also, the absolute maximum input voltage should not exceed the power supplies. Typical Performance Characteristics. The decrease of the maximum attenuation is due to the rolloff at higher frequencies of the

loop gains of the various internal feedback paths and not to the increase of the noise floor. For instance, for a 100kHz clock and 1kHz cutoff fre- quency, the maximum attenuation is about 64dB. A 4kHz, 1V RMS input signal will be predictably attenuated by 60dB at the output. A 6kHz, 1V RMS input signal will be attenu- ated by 64dB and not by 77dB as an ideal 5th order maximum flat filter would have dictated. The LTC1062 output at 6kHz will be about 630 RMS . The measured RMS noise from DC to 17kHz was 100 RMS which is 16dB below the filter output. OSC , Pin 5 The C OSC , Pin 5, can be used

with an external capacitor, OSC , connected from Pin 5 to ground. If C OSC is polarized it should be connected from Pin 5 to the negative supply, Pin 3. C OSC lowers the internal oscillator frequency. If Pin 5 is floating, an internal 33pF capacitor plus the external interpin capacitance set the oscillator frequency around 140kHz with 5V supply. An external C OSC will bring the oscillator frequency down by the ratio (33pF)/ (33pF + C OSC ). The Typical Performance Characteristics curves provide the necessary information to get the inter- nal oscillator frequency for various power supply

ranges. Pin 5 can also be driven with an external CMOS clock to override the internal oscillator. Although standard 7400 series CMOS gates do not guarantee CMOS levels with the current source and sink requirements of Pin 5, they will, in reality, drive the C OSC pin. CMOS gates conforming to standard B series output drive have the appropriate volt- age levels and more than enough output current to simultaneously drive several LTC1062 C OSC pins. The typical trip levels of the internal Schmitt trigger which input is Pin 5, are given in Table 1. Table 1 SUPPLY TH TH 2.5V 0.9V –1V 5V 1.3V –2.1V

6V 1.7V –2.5V 7V 1.75V –2.9V IN /f 0.1 –14 PIN1 /V IN (dB) –10 –6 –2 110 1062 F02 –12 –8 –4 RC 1.62 = 5V Figure 2. Amplitude Response of Pin 1 Internal Buffer The internal buffer out (Pin 8) and Pin 1 are part of the signal AC path. Excessive capacitive loading will cause gain errors in the passband, especially around the cutoff frequency. The internal buffer gain at DC is typically 0.006dB. The internal buffer output can be used as a filter output, however, it has a few millivolts of DC offset. The temperature coefficient of the internal buffer is typically V/ C. Filter Attenuation The

LTC1062 rolloff is typically 30dB/octave. When the clock and the cutoff frequencies increase, the filter’s maximum attenuation decreases. This is shown in the APPLICATIO S I FOR ATIO WU UU
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TC1062 1062fd Divide By 1, 2, 4 (Pin 4) By connecting Pin 4 to V , to mid supplies or to V , the clock frequency driving the internal switched capacitor network is the oscillator frequency divided by 1, 2, 4 respectively. Note that the f CLK /f ratio of 100:1 is with respect to the internal clock generator output frequency. The internal divider is useful for applications where octave tuning

is required. The 2 threshold is typically 1V from the mid supply voltage. Transient Response Figure 3 shows the LTC1062 response to a 1V input step. Filter Noise The filter wideband RMS noise is typically 100 RMS for 5V supply and it is nearly independent from the value of the cutoff frequency. For single 5V supply the RMS noise is 80 RMS . Sixty-two percent of the wideband noise is in the passband, that is from DC to f . The noise spectral density, unlike conventional active filters, is nearly zero for frequencies below 0.1 • f . This is shown in the Typical Performance Characteristics

section. Table 2 shows the LTC1062 RMS noise for different noise bandwidths. Table 2 NOISE BW RMS NOISE (V = 5V) DC – 0.1 • f DC – 0.25 • f DC – 0.5 • f 20 DC – 1 • f 62 DC – 2 • f 100 200mV/VERT DIV 50ms/HORIZ DIV, f = 10Hz 5ms/HORIZ DIV, f = 100Hz 0.5ms/HORIZ DIV, f = 1kHz RC 1.62 RC 1.94 RC 2.11 Figure 3. Step Response to a 1V Peak Input Step APPLICATIO S I FOR ATIO WU UU
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TC1062 1062fd AC Coupling an External CMOS Clock Powered from a Single Positive Supply, V FB AGND DIVIDER RATIO OUT OUT OSC TC1062 0.01 0 1062 TA03 IN 100k OUT Adding an External (R1, C1) to Eliminate the

Clock Feedthrough and to Improve the High Frequency Attenuation Floor FB AGND DIVIDER RATIO OUT OUT OSC TC1062 OUT CLK 1062 TA04 C1 0.01C IN R1 10R EXTERNAL BUFFER Filtering AC Signals from High DC Voltages FB AGND DIVIDER RATIO OUT OUT OSC TC1062 CLK IN = f • 100 1062 TA05 0.01 0.01 12R 309.6k IN 25.8k = –5V = 5V DC OUTPUT EXAMPLE: CLK = 100KHz, f = 1kHz. THE FILTER ACCURATELY PASSES THE HIGH DC INPUT AND ACTS AS 5TH ORDER LP FILTER FOR THE AC SIGNALS RIDING ON THE DC HIGH DC INPUT = 100V IN /f 0.01 –1.4 PASSBAND GAIN (dB) –1.0 0.6 0.2 0.1 1 1062 TA06 0.2 –1.2 0.8 0.4 = 5V CLK = 100kHz

Passband Amplitude Response for the High DC Accurate 5th Order Filter TYPICAL APPLICATIO S
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TC1062 1062fd Cascading Two LTC1062s to Form a Very Selective Clock Sweepable Bandpass Filter FB AGND DIVIDER RATIO OUT OUT OSC TC1062 1062 TA07 IN R1 10k CLK OUT 5V –5V 5V FB AGND DIVIDER RATIO OUT OUT OSC TC1062 –5V R2 10k 10k 12.5k FB AGND DIVIDER RATIO OUT OUT OSC TC1062 1062 TA08 IN R1 –5V CLK OUT 5V R2 R3 Clock Tunable Notch Filter For Simplicity Use R3 = R4 = R5 = 10k; R5 R4 R5 R2 = 1.234, = 79.3 CLK NOTCH Frequency Response of the Bandpass Filter (kHz) 0.5 (dB) –80 –60 –40 –20

1.5 2 2.5 1062 TA09 3.5 4 4.5 –90 –70 –50 –30 10 20 –10 = 5V IN = 100mV RMS = 1 R1 R2 = 0.8 Frequency Response of the Notch Filter (Hz) 100 (dB) –10 10 20 30 40 50 60 70 900 1062 TA10 300 500 700 1100 TYPICAL APPLICATIO S
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10 TC1062 1062fd Simple Cascading Technique FB AGND DIVIDER RATIO OUT OUT OSC TC1062 0.1 DC ACCURATE OUTPUT 0.1 1062 TA11 0.1 IN 412k = 5V CLK = 1kHz 10Hz, 10TH ORDER DC ACCURATE LOWPASS FILTER 60dB/OCTAVE ROLLOFF 0.5dB PASSBAND ERROR, 0dB DC GAIN MAXIMUM ATTENUATION 110dB (f CLK = 10kHz) 100dB (f CLK = 1kHz) 95dB (f CLK = 1MHz) –5V 5V –5V FB AGND DIVIDER

RATIO OUT OUT OSC TC1062 –5V 25.8k TC1052 100Hz, 50Hz, 25Hz 5th Order DC Accurate LP Filter FB AGND DIVIDER RATIO OUT OUT OSC TC1062 1062 TA12 0.1 0.1 1/2 CD4016 IN 25.8k –5V 5V 10kHz CLK IN OUT 0.2 OUT 13 TO PIN 13 OF CD4016 TO PIN 5 OF CD4016 BY CONNECTING PIN 4 OF THE LTC1062 HIGH/GROUND/LOW THE FILTER CUTOFF FREQUENCY IS 100Hz/50Hz/25Hz 100k –5V –5V 5V 5V 100k CONTROL (HIGH, GROUND, LOW) 100k 100k TYPICAL APPLICATIO S
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11 TC1062 1062fd 7th Order 100Hz Lowpass Filter with Continuous Output Filtering, Output Buffering and Gain Adjustment FB AGND DIVIDER RATIO OUT OUT OSC

TC1062 IN 2.6k –5V 5V 5V 1062 TA13 10kHz CLK IN DC GAIN 10 R3 3.57k R4 32.4k R1 14.3k 46k R2 53.6k 274k C1 0.1 0.01 C2 0.033 0.02 THE LTC1052 IS CONNECTED AS A 2ND ORDER SALLEN AND KEY LOWPASS FILTER WITH A CUTOFF FREQUENCY EQUAL TO THE CUTOFF FREQUENCY OF THE LTC1062. THE ADDITIONAL FILTERING ELIMINATES ANY 10kHz CLOCK FEEDTHROUGH PLUS DECREASES THE WIDEBAND NOISE OF THE FILTER DC OUTPUT OFFSET (REFERRED TO A DC GAIN OF UNITY) = 5 V MAX WIDEBAND NOISE (REFERRED TO A DC GAIN OF UNITY) = 60 RMS R1 0.1 0.1 OUT 5V C2 –5V C1 R3 R4 R2 TC1052 OUTPUT FILTER COMPONENT VALUES Single 5V Supply 5th Order

LP Filter FB AGND DIVIDER RATIO OUT OUT OSC TC1062 1062 TA14 IN 5V 10 SOLID ANTALUM 5V 25k 5V CLK FOR A 10Hz FILTER: R = 29.4k, C = 1 F, f CLK = 1kHz THE FILTER IS MAXIMALLY FLAT FOR DC ACCURATE OUTPUT BUFFERED OUTPUT 25k 12R RC 1.84 TYPICAL APPLICATIO S
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12 TC1062 1062fd A Lowpass Filter with a 60Hz Notch FB AGND DIVIDER RATIO OUT OUT OSC TC1062 1062 TA15 IN 9.09k CLK IN 2.84kHz OUT R2 20k R3 20k R4 10k R6 19.35k R5 10k A1 1/2 LT1013 A2 1/2 LT1013 R7 20k C7 0.1 RC CLK 100 • 1.62 Frequency Response of the Above Lowpass Filter with the Notch f NOTCH = f CLK /47.3 IN (Hz) 30 OUT

/V IN (Hz) 10 –10 10 100 1k 1062 TA16 50 40 20 60 70 TYPICAL APPLICATIO S
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13 TC1062 1062fd J8 Package 8-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) J8 0801 .014 – .026 (0.360 – 0.660) .200 (5.080) MAX .015 – .060 (0.381 – 1.524) .125 3.175 MIN .100 (2.54) BSC .300 BSC (7.62 BSC) .008 – .018 (0.203 – 0.457) – 15 .005 (0.127) MIN .405 (10.287) MAX .220 – .310 (5.588 – 7.874) 12 87 65 .025 (0.635) RAD TYP .045 – .068 (1.143 – 1.650) FULL LEAD OPTION .023 – .045 (0.584 – 1.143) HALF LEAD OPTION CORNER LEADS OPTION (4 PLCS) .045 – .065 (1.143 – 1.651)

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS OBSOLETE PACKAGE PACKAGE DESCRIPTIO
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14 TC1062 1062fd N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) N8 1002 .065 (1.651) TYP .045 – .065 (1.143 – 1.651) .130 .005 (3.302 0.127) .020 (0.508) MIN .018 .003 (0.457 0.076) .120 (3.048) MIN 12 87 6 .255 .015* (6.477 0.381) .400* (10.160) MAX .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 PACKAGE DESCRIPTIO
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15 TC1062 1062fd 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. SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) S16 (WIDE) 0502 NOTE 3 .398 – .413 (10.109 – 10.490) NOTE 4 16 15 14 13

12 11 10 9 23 78 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 – 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 .005 123 N/2 .050 BSC .030 .005 TYP PACKAGE DESCRIPTIO
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16 TC1062 1062fd INEAR TECHNOLOGY CORPORATION 1994 LW/TP 1102 1K REV D • PRINTED IN USA Linear Technology Corporation 630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507  www.linear.com A Low Frequency, 5Hz Filter Using Back-to-Back Solid Tantalum Capacitors FB AGND DIVIDER RATIO OUT OUT OSC TC1062 0.08 1062 TA17 10 10 IN 5.23k 5V –5V OUT BV OUT

TYPICAL APPLICATIO PART NUMBER DESCRIPTION COMMENTS LTC1063 5th Order Butterworth Lowpass, DC Accurate Clock Tunable, No External Components LTC1065 5th Order Bessel Lowpass, DC Accurate Clock Tunable, No External Components LTC1066-1 8th Order Elliptic or Linear Phase, DC Accurate Clock Tunable, fc 120kHz LTC1563-2/ LTC1563-3 Active RC, 4th Order Lowpass Very Low Noise, 256Hz fc 256kHz LTC1564 10kHz to 150kHz Digitally Controlled Lowpass and PGA Continuous Time, Very High Dynamic Range, PGA Included LTC1569-6 Linear Phase, DC Accurate, 10th Order No External Clock Required, fc 64kHz, S08

LTC1569-7 Linear Phase, DC Accurate, 10th Order No External Clock Required, fc 300kHz, S08 RELATED PARTS