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LTC1062 5th Order Lowpass Filter
FEATURES

DESCRIPTIO
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(R)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 LTCMOSTM silicon gate process.
, LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation.
APPLICATIO S

60Hz Lowpass Filters Antialiasing Filter Low Level Filtering Rolling Off AC Signals from High DC Voltages Digital Voltmeters Scales Strain Gauges
TYPICAL APPLICATIO
25.8k VIN 1F 1 2 FB AGND V- BOUT OUT V+
10Hz 5th Order Butterworth Lowpass Filter
DC ACCURATE OUTPUT 8 7 BUFFERED OUTPUT
Filter Amplitude Response and Noise
0 -10 COSC = 3900pF
AMPLITUDE RESPONSE (dB)
-20 -30 -40 -50 -60 -70 -80 -90 50 40 30 20 10 1 10 INPUT FREQUENCY (Hz) 0 100
1062 TA02
LTC1062 V - = -5V 3 4 6 5
DIVIDER COSC RATIO
COSC= 3900pF V + = 5V
1062 TA01
-100
NOTE: TO ADJUST OSCILLATOR FREQUENCY, USE A 6800pF CAPACITOR IN SERIES WITH A 50k POT FROM PIN 5 TO GROUND
U
FILTER OUTPUT NOISE (V/Hz)
1062fd
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1
LTC1062
ABSOLUTE
AXI U
RATI GS
Total Supply Voltage (V+ to V-) ............................... 18V Input Voltage at Any Pin ..... V- - 0.3V VIN V+ + 0.3V Operating Temperature Range LTC1062M (OBSOLETE) ............. -55C TA 125C LTC1062C ................................... - 40C TA 85C
PACKAGE/ORDER I FOR ATIO
TOP VIEW FB 1 AGND 2 V- 3 DIVIDER 4 RATIO N8 PACKAGE 8-LEAD PDIP 8 7 6 5 BOUT OUT V+ COSC
ORDER PART NUMBER LTC1062CN8
TJ MAX = 100C, JA = 130C/W J8 PACKAGE 8-LEAD CERDIP TJ MAX = 150C, JA = 100C/W
LTC1062MJ8 LTC1062CJ8
OBSOLETE PACKAGE
Consider the N8 Package as an Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS +
PARAMETER Power Supply Current Input Frequency Range Filter Gain at fIN = 0 fIN = 0.5fC (Note 2) fIN = fC fIN = 2fC fIN = 4fC Clock-to-Cutoff Frequency Ratio, fCLK/fC Filter Gain at fIN = 16kHz fCLK/fC Tempco Filter Output (Pin 7, Pin 13 in SW16) DC Swing Clock Feedthrough CONDITIONS COSC
The denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. V = 5V, V- = - 5V, unless otherwise specified. AC output measured at Pin 7, Figure 1.
MIN
(Pin 5 to V -, Pin 11 in SW16) = 100pF
fCLK C = 0.01F, R = 25.78k
= 100kHz, Pin 4 (Pin 6 in SW16) at V+,

fCLK = 100kHz, Pin 4 (Pin 6 in SW16) at V+, C = 0.01F, R = 25.78k fCLK = 400kHz, Pin 4 at V +, C = 0.01F, R = 6.5k fCLK = 400kHz, Pin 4 at V+, C = 0.01F, R = 6.5k Pin 7/Pin13 (SW16) Buffered with an External Op Amp

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U
W
WW U
W
(Note 1)
Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C
TOP VIEW NC 1 NC 2 FB 3 AGND 4 V- 5 DIVIDER 6 RATIO NC 7 NC 8 SW PACKAGE 16-LEAD PLASTIC SO 16 NC 15 NC 14 BOUT 13 OUT 12 V + 11 COSC 10 NC 9 NC
ORDER PART NUMBER LTC1062CSW
TJ MAX = 150C, JA = 90C/W
TYP 4.5 0 to 20
MAX 7 10
UNITS mA mA kHz dB dB dB dB dB % dB ppm/C V mVP-P
-2 -28 -52
0.00 - 0.02 -0.3 -3.00 -30.00 -60.00 100 1
-43 3.5
-52 10 3.8 1
1062fd
LTC1062
ELECTRICAL CHARACTERISTICS+
PARAMETER Internal Buffer Bias Current CONDITIONS
The denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. V = 5V, V- = - 5V, unless otherwise specified, AC output measured at Pin 7, Figure 1.
MIN TYP 2 170 2 RLOAD = 20k
MAX 50 1000 20
UNITS pA pA mV V mA
Offset Voltage Voltage Swing Short-Circuit Current Source/Sink Clock (Note 3) Internal Oscillator Frequency Max Clock Frequency Pin 5 (Pin 11 in SW16) Source or Sink Current Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: fC is the frequency where the gain is -3dB with respect to the input signal.
3.5
3.8 40/3
COSC (Pin 5 to V-, Pin 11 in SW16) = 100pF
25 15
32 4 40
50 65 80
kHz kHz MHz A
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.
TYPICAL PERFOR A CE CHARACTERISTICS
Amplitude Response Normalized to the Cutoff Frequency
0 -10 -20
RESPONSE (dB)
VS = 2.5V TA = 25C 1 = fC 2RC 1.62
RESPONSE (dB)
-30 -40 -50 -60 -70 -80 -90 fCLK = 10kHz, fC = 100Hz fCLK = 1kHz, fC = 10Hz 1 fIN/fC 10
1062 G01
-30 -40 -50 -60 -70 -80 -90 fCLK = 10kHz, fC = 100Hz fCLK = 1kHz, fC = 10Hz 1 fIN/fC 10
1062 G01
PASSBAND GAIN (dB)
fCLK = 500kHz, fC = 5kHz fCLK = 250kHz, fC = 2.5kHz fCLK = 100kHz, fC = 1kHz
-100 0.1
UW
Amplitude Response Normalized to the Cutoff Frequency
0 -10 -20 VS = 2.5V TA = 25C 1 = fC 2RC 1.62
Passband Gain vs Input Frequency
0.4 VS = 5V TA = 25C 0.2 f CLK = 100kHz 0 -0.2 -0.4 -0.6 -0.8 -1.0 0.1 1 = fC 2RC 1.62 1 = fC 2RC 1.64 1 = fC 2RC 1.6
fCLK = 500kHz, fC = 5kHz fCLK = 250kHz, fC = 2.5kHz fCLK = 100kHz, fC = 1kHz
-100 0.1
0.2 fIN/fC
0.4
0.6
0.8
1
1062 G03
1062fd
3
LTC1062 TYPICAL PERFOR A CE CHARACTERISTICS
Passband Gain vs Input Frequency and Temperature
0.4 0.2 PASSBAND GAIN (dB) 0 -0.2 -0.4 -0.6 -0.8 -1.0 0.1 VS = 5V fCLK = 100kHz 1 = fC 2RC 1.62
0 -30
TA = 125C TA = -55C
PHASE SHIFT (DEG)
FILTER OUTPUT NOISE (V/Hz)
0.2 fIN/fC
0.4
Normalized Oscillator Frequency, fOSC vs Supply Voltage
1.6
OSCILLATOR FREQUENCY NORMALIZED TO fOSC AT 5V SUPPLY
1.5
OSCILLATOR FREQUENCY (kHz)
SUPPLY CURRENT (mA)
1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 4 6 8 10 14 VSUPPLY (V) 12 16 18 20
4
UW
0.6 0.8
Passband Phase Shift vs Input Frequency
VS = 5V fCLK = 100kHz 1 = fC 2RC 1.62 TA = 25C
Filter Noise Spectral Density
80 70 60 50 fC = 10Hz 40 30 20 10 fC = 100Hz fC = 1kHz 1 1k 10 100 CUTOFF FREQUENCY (Hz) 10k
1062 G06
VS = 5V TA = 25C
-60 -90 -120 -150 -180 -210 0.1
1
0.2 fIN/fC
0.4
0.6
0.8
1
0 0.1
1062 G04
1062 G05
Oscillator Frequency, fOSC vs Ambient Temperature
260 240 220 200 180 160 140 120 100 80 V + = 5V - V = 0V V + = 10V - = 0V V
12 10 8 6 4 2 0
Power Supply Current vs Power Supply Voltage
16 14 TA = -55C TA = 25C
COSC = 0pF
TA = 125C
60 25 50 -50 -25 0 75 100 AMBIENT TEMPERATURE (C)
125
4
6
8 10 12 14 16 18 POWER SUPPLY VOLTAGE (V)
20
1062 G07
1062 G08
1062 G09
1062fd
LTC1062
BLOCK DIAGRA W
SWITCHED CAPACITOR NETWORK x1 fCLK V- 3 CLOCK GEN 6 V+ 8 BOUT 7 OUT / 1, 2, 4 OSC 5 COSC
1062 BD
For Adjusting Oscillator Frequency, Insert a 50k Pot in Series with COSC. Use Two Times Calculated COSC
BY CONNECTING PIN 4 TO V +, AGND OR V -, THE OUTPUT FREQUENCY OF THE INTERNAL CLOCK GENERATOR IS THE OSCILLATOR FREQUENCY DIVIDED BY 1, 2, 4. THE (fCLK/fC) RATIO OF 100:1 IS WITH RESPECT TO THE INTERNAL CLOCK GENERATOR OUTPUT FREQUENCY. PIN 5 CAN BE DRIVEN WITH AN EXTERNAL CMOS LEVEL CLOCK. THE LTC1062 CAN ALSO BE SELF-CLOCKED BY CONNECTING AN EXTERNAL CAPACITOR (COSC) TO GROUND (OR TO V - IF COSC IS POLARIZED). UNDER THIS CONDITION AND WITH 5V SUPPLIES, THE INTERNAL OSCILLATOR FREQUENCY IS: fOSC 140kHz [33pF/(33pF + COSC)]
FB
1
AGND
2
/
4
AC TEST CIRCUIT
5V VIN R = 25.8k C = 0.01F 50 1 2 FB AGND V- BOUT OUT V+ 8 7 0.1F R -5V 5V 5V -5V fCLK = 100kHz 2 3
+ -
1
7 LTC1052 8 4 6 MEASURED OUTPUT FOR BEST MAX FLAT APPROXIMATION, THE INPUT RC SHOULD BE SUCH AS: 1 = fCLK 1 * 2RC 100 1.63 0.1F A 0.5k RESISTOR, R, SHOULD BE USED IF THE BIPOLAR EXTERNAL CLOCK IS APPLIED BEFORE THE POWER SUPPLIES TURN ON
LTC1062 V
- = -5V
3 4
6 5
DIVIDER COSC RATIO
1062 F01
Figure 1
1062fd
5
LTC1062
APPLICATIO S I FOR ATIO
Filter Input Voltage Range Every node of the LTC1062 typically swings within 1V of either voltage supply, positive or negative. With the appropriate 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 * fC, 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.
6 4 2 0
VPIN1/VIN (dB)
VS = 5V 1 = fC 2RC 1.62
-2 -4 -6 -8 -10 -12 -14 0.1 1 fIN/fC 10
1062 F02
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 1V/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
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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 frequency, the maximum attenuation is about 64dB. A 4kHz, 1VRMS input signal will be predictably attenuated by 60dB at the output. A 6kHz, 1VRMS input signal will be attenuated 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 630VRMS. The measured RMS noise from DC to 17kHz was 100VRMS which is 16dB below the filter output. COSC, Pin 5 The COSC, Pin 5, can be used with an external capacitor, COSC, connected from Pin 5 to ground. If COSC is polarized it should be connected from Pin 5 to the negative supply, Pin 3. COSC 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 COSC will bring the oscillator frequency down by the ratio (33pF)/ (33pF + COSC). The Typical Performance Characteristics curves provide the necessary information to get the internal 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 COSC pin. CMOS gates conforming to standard B series output drive have the appropriate voltage levels and more than enough output current to simultaneously drive several LTC1062 COSC pins. The typical trip levels of the internal Schmitt trigger which input is Pin 5, are given in Table 1.
Table 1
VSUPPLY 2.5V 5V 6V 7V VTH+ 0.9V 1.3V 1.7V 1.75V VTH- -1V -2.1V -2.5V -2.9V
1062fd
W
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LTC1062
APPLICATIO S I FOR ATIO
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 fCLK/fC 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.
Figure 3. Step Response to a 1V Peak Input Step Table 2
NOISE BW DC - 0.1 * fC DC - 0.25 * fC DC - 0.5 * fC DC - 1 * fC DC - 2 * fC RMS NOISE (VS = 5V) 2V 8V 20V 62V 100V
1062fd
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Filter Noise The filter wideband RMS noise is typically 100VRMS for 5V supply and it is nearly independent from the value of the cutoff frequency. For single 5V supply the RMS noise is 80VRMS. Sixty-two percent of the wideband noise is in the passband, that is from DC to fC. The noise spectral density, unlike conventional active filters, is nearly zero for frequencies below 0.1 * fC. This is shown in the Typical Performance Characteristics section. Table 2 shows the LTC1062 RMS noise for different noise bandwidths.
200mV/VERT DIV 50ms/HORIZ DIV, fC = 10Hz 5ms/HORIZ DIV, fC = 100Hz 0.5ms/HORIZ DIV, fC = 1kHz f 1 =C 2RC 1.62
W
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f 1 =C 2RC 1.94
f 1 =C 2RC 2.11
7
LTC1062
TYPICAL APPLICATIO S
AC Coupling an External CMOS Clock Powered from a Single Positive Supply, V +
VIN C 1 2 FB AGND V- BOUT OUT V+ 8 7 VOUT
Adding an External (R1, C1) to Eliminate the Clock Feedthrough and to Improve the High Frequency Attenuation Floor
VIN C 1 2 FB AGND V- BOUT OUT V+ 8 7 C1 0.01C
Filtering AC Signals from High DC Voltages
R 25.8k VIN 1 HIGH DC INPUT = 100V 2 C 0.01F FB AGND V- BOUT OUT 8 7 C 0.01F 12R 309.6k DC OUTPUT
PASSBAND GAIN (dB)
LTC1062 V
- = -5V
3 4
6 V+ 5 CLK IN = fC * 100
DIVIDER COSC RATIO
V + = 5V EXAMPLE: fCLK = 100KHz, fC = 1kHz. THE FILTER ACCURATELY PASSES THE HIGH DC INPUT AND ACTS AS 5TH ORDER LP FILTER FOR THE AC SIGNALS RIDING ON THE DC
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R
LTC1062 V- 3 4 6 5 100k
1062 TA03
V + 0.01F
V+ 0
DIVIDER COSC RATIO
-
R1 10R EXTERNAL BUFFER VOUT
+
LTC1062 V- 3 4 6 5 V+ fCLK
1062 TA04
DIVIDER COSC RATIO
Passband Amplitude Response for the High DC Accurate 5th Order Filter
0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 VS = 5V fCLK = 100kHz -1.4 0.01
1062 TA05
0.1 fIN /fC
1
1062 TA06
1062fd
LTC1062
TYPICAL APPLICATIO S
Cascading Two LTC1062s to Form a Very Selective Clock Sweepable Bandpass Filter
R1 10k VIN R2 10k 1 2 R1 10k R2 12.5k 1 2
R1 VIN FB AGND V- BOUT OUT V+
2
7
LTC1062 -5V 3 4 6 5 5V fCLK
1062 TA08
DIVIDER COSC RATIO
Frequency Response of the Bandpass Filter
20 10 0 -10 -20 (dB) -30 -40 -50 -60 -70 -80 -90 0.5 1 1.5 2 2.5 (kHz) 3 3.5 4 4.5 VS = 5V R1 = 1 R2 R1 = 0.8 R2 VIN = 100mVRMS (dB)
Frequency Response of the Notch Filter
-10 0 10 20 30 40 50 60 70 100 300 500 (Hz) 700 900 1100
1062 TA10
1062 TA09
+
-
U
FB AGND
-
BOUT OUT
+
8 7
FB AGND
-
BOUT OUT V+
8 7
VOUT
LTC1062 -5V 3 4 V V 6 5 5V -5V 3 4 V
LTC1062 6 5 5V
DIVIDER COSC RATIO
DIVIDER COSC RATIO
fCLK
1062 TA07
Clock Tunable Notch Filter For Simplicity Use R3 = R4 = R5 = 10k; R5 = 1.234, fCLK = 79.3 fNOTCH R2 1
R4 R5
R2 1
8
R3
VOUT
1062fd
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LTC1062
TYPICAL APPLICATIO S
Simple Cascading Technique
5V 25.8k VIN 1F 1 2 FB AGND V- BOUT OUT V+ 8 7 1 2 0.1F FB AGND V- BOUT OUT V+ 8 7 0.1F -5V 2 412k 3
LTC1062 -5V 3 4 6 5 -5V 3 4
DIVIDER COSC RATIO
10Hz, 10TH ORDER DC ACCURATE LOWPASS FILTER 60dB/OCTAVE ROLLOFF 0.5dB PASSBAND ERROR, 0dB DC GAIN MAXIMUM ATTENUATION 110dB (fCLK = 10kHz) 100dB (fCLK = 1kHz) 95dB (fCLK = 1MHz)
CONTROL (HIGH, GROUND, LOW)
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+ -
1
7 LTC1052 8 4 6 DC ACCURATE OUTPUT
LTC1062 6 5
0.1F
DIVIDER COSC RATIO
V + = 5V
1062 TA11
fCLK = 1kHz
100Hz, 50Hz, 25Hz 5th Order DC Accurate LP Filter
25.8k VIN 0.1F 1 2 1 2 FB AGND V- 0.1F 3 13 1/2 CD4016 4 BOUT OUT V+ 8 7 BOUT 5 VOUT 0.2F
LTC1062 -5V 3 4 6 5 5V 10kHz CLK IN
DIVIDER COSC RATIO
100k 5V 100k
TO PIN 5 OF CD4016
-5V 5V 100k
BY CONNECTING PIN 4 OF THE LTC1062 HIGH/GROUND/LOW THE FILTER CUTOFF FREQUENCY IS 100Hz/50Hz/25Hz
TO PIN 13 OF CD4016 100k -5V
1062 TA12
1062fd
LTC1062
TYPICAL APPLICATIO S
7th Order 100Hz Lowpass Filter with Continuous Output Filtering, Output Buffering and Gain Adjustment
R3 5V 2 R4
2.6k VIN 1F 1 2 FB AGND V-
-5V 5V
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) = 5V MAX WIDEBAND NOISE (REFERRED TO A DC GAIN OF UNITY) = 60VRMS OUTPUT FILTER COMPONENT VALUES DC GAIN R3 R4 R1 R2 C1 C2 1 0 14.3k 53.6k 0.1F 0.033F 10 3.57k 32.4k 46k 274k 0.01F 0.02F
10F SOLID TANTALUM
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3 4
- +
1
7 LTC1052 6 8 4 0.1F VOUT
R1
R2 C1 C2
3
BOUT OUT V+
8 7
0.1F -5V
LTC1062 6 5 5V 10kHz CLK IN
1062 TA13
DIVIDER COSC RATIO
Single 5V Supply 5th Order LP Filter
R 5V VIN C 25k 1 2 25k 5V FB AGND V- BOUT OUT V+ 8 7 BUFFERED OUTPUT C DC ACCURATE OUTPUT
+
LTC1062 3 4 6 5 5V CLK
DIVIDER COSC RATIO 12R
1062 TA14
FOR A 10Hz FILTER: R = 29.4k, C = 1F, fCLK = 1kHz 1 = fC THE FILTER IS MAXIMALLY FLAT FOR 2RC 1.84
1062fd
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LTC1062
TYPICAL APPLICATIO S
A Lowpass Filter with a 60Hz Notch
C7 0.1F R6 19.35k R3 20k R 9.09k VIN C 1F R2 20k R4 10k R7 20k
FB AGND V-
BOUT OUT
LTC1062 V
-
4
DIVIDER COSC RATIO
5
CLK IN 2.84kHz 1 = fCLK 2RC 100 * 1.62
Frequency Response of the Above Lowpass Filter with the Notch fNOTCH = fCLK/47.3
-10 0 10
VOUT/VIN (Hz)
20 30 40 50 60 70 1 10 fIN (Hz)
1062 TA16
100
1k
12
+
3
6 V+
A2 1/2 LT1013
1062 TA15
V+
-
2
7
A1 1/2 LT1013
+
-
1
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8
R5 10k
VOUT
1062fd
LTC1062
PACKAGE DESCRIPTIO U
J8 Package 8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
CORNER LEADS OPTION (4 PLCS) .405 (10.287) MAX 8 7 6 5 .005 (0.127) MIN .023 - .045 (0.584 - 1.143) HALF LEAD OPTION .045 - .068 (1.143 - 1.650) FULL LEAD OPTION .300 BSC (7.62 BSC) .025 (0.635) RAD TYP 1 2 3 .220 - .310 (5.588 - 7.874) 4 .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
J8 0801
.008 - .018 (0.203 - 0.457)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS
OBSOLETE PACKAGE
1062fd
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LTC1062
PACKAGE DESCRIPTIO
.300 - .325 (7.620 - 8.255)
.008 - .015 (0.203 - 0.381) +.035 .325 -.015
(
8.255
+0.889 -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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N8 Package 8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400* (10.160) MAX 8 7 6 5 .255 .015* (6.477 0.381) 1 2 3 4 .130 .005 (3.302 0.127) .045 - .065 (1.143 - 1.651) .065 (1.651) TYP .120 (3.048) .020 MIN (0.508) MIN .018 .003 (0.457 0.076)
N8 1002
.100 (2.54) BSC
1062fd
LTC1062
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.
U
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
1062fd
15
LTC1062
TYPICAL APPLICATIO
A Low Frequency, 5Hz Filter Using Back-to-Back Solid Tantalum Capacitors
5.23k VIN
-5V
RELATED PARTS
PART NUMBER LTC1063 LTC1065 LTC1066-1 LTC1563-2/ LTC1563-3 LTC1564 LTC1569-6 LTC1569-7 DESCRIPTION 5th Order Butterworth Lowpass, DC Accurate 5th Order Bessel Lowpass, DC Accurate 8th Order Elliptic or Linear Phase, DC Accurate Active RC, 4th Order Lowpass 10kHz to 150kHz Digitally Controlled Lowpass and PGA Linear Phase, DC Accurate, 10th Order Linear Phase, DC Accurate, 10th Order COMMENTS Clock Tunable, No External Components Clock Tunable, No External Components Clock Tunable, fc 120kHz Very Low Noise, 256Hz fc 256kHz Continuous Time, Very High Dynamic Range, PGA Included No External Clock Required, fc 64kHz, S08 No External Clock Required, fc 300kHz, S08
16
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507
www.linear.com
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U
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10F 10F 1 2 8 7 VOUT FB AGND V- BOUT OUT V+ BVOUT LTC1062 3 4 6 5 0.08F
1062 TA17
5V
DIVIDER COSC RATIO
1062fd LW/TP 1102 1K REV D * PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1994

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