INFORMATION PURPOSES ONLY LTC1164-8 Ultraselective, Power Order E
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INFORMATION PURPOSES ONLY
LTC1164-8 Ultraselective, Power Order Elliptic Bandpass Filter with Adjustable Gain
FEATURES
DESCRIPTION
LTC1164-8 monolithic ultraselective, order, elliptic bandpass filter. passband LTC1164-8 tuned with external clock clock-to-center frequency ratio 100:1. pass bandwidth typically filter center frequency. stopband attenuation LTC1164-8 greater than 50dB. lower upper stopband frequencies less than 0.96 center frequency greater than 1.04 center frequency, respectively. LTC1164-8 requires external external resistors (see circuit below). filter's gain center frequency ratio /RF. gain equal optimum dynamic range, should 61.9k should 340k. gains other than one, 340k/Gain. Gains 1000 obtainable. Setting filter's gain with input resistor does increase filter's wideband noise. 270VRMS wideband noise LTC1164-8 independent filter's center frequency. LTC1164-8 available 14-pin PDIP 16-pin surface mount Wide package.
registered trademarks Linear Technology Corporation.
Ultraselectivity (50dB Attenuation Center Frequency) Adjustable Passband Gain Noise Independent Gain Filter Noise: 270VRMS, Single Supply Clock-Tunable (Center Frequency fCLK /100) Center Frequencies 5kHz, (Typical ISUPPLY 3.2mA) Center Frequencies 4kHz, Single Supply (Typical ISUPPLY 2.3mA)
APPLICATIONS
Asynchronous Narrowband Signal Detectors Frequency Asynchronous Demodulators Handheld Spectrum Analyzers In-Band Tone Signaling Detectors
TYPICAL APPLICATION
Ultranarrow 1kHz Bandpass Filter with Gain Gain 340k/R 1/(2 Center Frequency
LTC1164-8 SHORT CONNECTION UNDER SHIELDED GROUND PLANE 200pF 61.9k
GAIN (dB)
100kHz
VOUT
®1006
LTC1164-8 TA01
0.90
Frequency Response
50dB
0.95 1.05 1.00 FREQUENCY (kHz)
1.10
1.15
1164-8 TA02
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LTC1164-8
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage 16.5V Power Dissipation 700mW Burn-In Voltage 16.5V Voltage Input 0.3V) 0.3V) Operating Temperature Range* 70°C Storage Temperature Range 65°C 150°C Lead Temperature (Soldering, sec). 300°C Maximum Clock Frequency ±7.5V 720kHz 540kHz Single 430kHz
*For extended operating temperature range contact Marketing details.
PACKAGE/ORDER INFORMATION
VIEW INVB AGND AGND INVA PACKAGE 14-LEAD PDIP
TJMAX 110°C, 65°C/
ORDER PART NUMBER
R(h, fCLK IOUT
LTC1164-8CN
Consult factory Industrial Military grade parts.
ELECTRICAL CHARACTERISTICS
PARAMETER Gain Center Frequency ±2.375V Gain 0.995 Center Frequency 1.005 Center Frequency (Referenced Gain Center Frequency) Lower Stopband Attenuation (Referenced Gain Center Frequency) ±2.375V ±2.375V
(See Test Circuit)
25°C, Center Frequency fCLK /100, fCLK 100kHz (the clock signal CMOS square wave, clock rise fall time 1s), test signal level 1VRMS 0.5VRMS ±2.375V, unless otherwise specified.
CONDITIONS 1000Hz
VIEW INVB AGND AGND INVA R(h, fCLK IOUT
ORDER PART NUMBER LTC1164-8CSW
PACKAGE 16-LEAD PLASTIC WIDE TJMAX 110°C, 85°C/
UNITS
1000Hz
995Hz 1005Hz 995Hz 1005Hz 960Hz (Note 800Hz 960Hz (Note 800Hz
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LTC1164-8
ELECTRICAL CHARACTERISTICS
PARAMETER Upper Stopband Attenuation (Referenced Gain Center Frequency) ±2.375V
(See Test Circuit)
25°C, Center Frequency fCLK /100, fCLK 100kHz clock signal CMOS square wave, clock rise fall time 1s), test signal level 1VRMS 0.5VRMS ±2.375V, unless otherwise specified.
CONDITIONS 1040Hz (Note 1200Hz
UNITS VRMS VRMS
Maximum Output 0.25% Total Harmonic Distortion Output Offset Power Supply Current (Note ±2.5V
1040Hz (Note 1200Hz 1000Hz 1000Hz
±2.5V Output External Amp) ±2.375V
11.0 12.5
±7.5V Power Supply Range denotes specifications which apply over full operating temperature range. Note minimum stopband attenuation 960Hz 1040Hz guaranteed design test correlation. ±2.375
Note maximum current over temperature 0°C. 70°C maximum current less than maximum value 25°C.
TYPICAL PERFORMANCE CHARACTERISTICS
Gain Frequency
25°C 100kHz
GAIN (dB)
GAIN (dB)
±7.5V
GAIN (dB)
1120 1000 FREQUENCY (Hz) 1240
LTC1164-8 TPC01
Passband Variations Power Supply
fCLK 100kHz GAIN 340k 61.9k
Passband Gain Phase Frequency
±2.5V
25°C fCLK 100kHz
PHASE (DEG)
-120 -180 -240 -300 -360 1008 1000 FREQUENCY (Hz) 1016
LTC1164-8 TPC03
1000 FREQUENCY (Hz)
1005
1010
-420
LTC1164-8 TPC02
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LTC1164-8 TYPICAL PERFORMANCE CHARACTERISTICS
Passband Gain Delay Frequency
25°C 100kHz
GAIN (dB)
(THD NOISE/VIN) (dB)
DELAY (ms)
0.01
(THD NOISE/VIN) (dB)
1008 1000 FREQUENCY (Hz) 1016
LTC1164-8 TPC04
Noise Input Voltage
25°C SINGLE 1kHz fCLK 100kHz FILTER GAIN fCENTER OUTPUT LT1006
POWER SUPPLY CURRENT (mA)
(THD NOISE/VIN) (dB)
OUTPUT LEVEL (dBV)
AGND 2.5V AGND
INPUT VOLTAGE (VP-P)
LTC1164-8 TPC07
Noise Input Voltage
25°C 1kHz fCLK 100kHz FILTER GAIN fCENTER OUTPUT LT1006 INPUT VOLTAGE (VRMS)
Noise Input Voltage
25°C SINGLE 1kHz fCLK 100kHz FILTER GAIN fCENTER OUTPUT LT1006 AGND 2.5V AGND
0.01
INPUT VOLTAGE (VRMS)
LTC1164-8 TPC05
LTC1164-8 TPC06
Power Supply Current Power Supply Voltage
25°C 70°C
Output Input
fCLK 100kHz fCENTER 1kHz 1kHz
SINGLE (PINS
POWER SUPPLY VOLTAGE
LTC1164-8 TPC08
INPUT LEVEL (dBV)
LTC1164-8 TPC09
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LTC1164-8
FUNCTIONS
(Pins 12): Power Supply Pins. (Pin (Pin should bypassed with 0.1F capacitor reliable ground plane. filter's power supplies should isolated from other digital high voltage analog supplies. noise linear supply recommended. Using switching power supply will lower signal-to-noise ratio filter. power supply during power-up should have slew rate less than 1V/s. dual supply operation supply applied before supply supply applied before supply, signal diode each supply ground will prevent latchup. Figures show typical connections dual single supply operation. fCLK (Pin 11): Clock Input Pin. CMOS clock source with square wave output duty cycle (±10%) adequate clock source device.
Figure Dual Power Supply Operation (Gain
61.9k fCLK
340k
LTC1164-8
0.1F
Figure Single Power Supply Operation (Gain
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*FOR SURFACE MOUNT CIRCUITS MOTOROLA DIODE MBR0530 EQUIVALENT
*1N4148 EQUIVALENT
(14-Lead PDIP)
power supply clock source should filter's power supply. analog ground filter should connected clock's ground single point only. Table shows clock's high level threshold values dual single supply operation. pulse generator used clock source provided high level on-time least Sine waves recommended clock input frequencies less than 100kHz. clock's rise fall time should equal less than
Table Clock Source High Threshold Levels
POWER SUPPLY Single Supply Single Supply Dual Supply ±2.5V Dual Supply Dual Supply ±7.5V HIGH LEVEL >1.45V >7.80V >0.73V >1.45V >2.18V LEVEL <0.5V <6.5V 2.0V <0.5V <0.5V
340k
LTC1164-8
fCLK 0.1F 1N4148* EQUIVALENT
61.9k 0.1F 0.1F VOUT
LTC1164-8
0.1F
0.1F
LTC1164-8
VOUT
LTC1164-8
FUNCTIONS
AGND (Pins Analog Ground Pins. dual supply operation, Pins (AGND) connected analog ground plane. single supply operation, Pins should biased supply bypassed analog ground plane with (tantalum better) capacitor (Figure optimum gain linearity single supply operation, analog ground Pins should biased Under these conditions typical output swing 0.5V 3.5V (please refer Noise Input Voltage graph). filter performance depends quality analog ground. either dual single supply operation, analog ground plane surrounding package necessary. analog ground plane filter should connected digital ground plane single point. INVB, INVA, IOUT, (Pins 14): External Connection Pins. (INVB) inverting input amp. (IOUT) junction internal resistors. (INVA) inverting input amp, junction internal resistors. normal filter operation external input resistor (RIN) should connected input output should connected inverting input external with feedback resistor (RF). Also Pins should connected together (Figures printed circuit board external connections should less than inch surrounded ground plane. input resistor output with feedback resistor determine filter's gain dynamic range. Please refer Applications Information section more information. 13): Pins. Pins connected circuit point device should tied analog ground dual single supply operation.
TEST CIRCUIT
100pF 340k 1N4148 0.1F LTC1164-8 0.1F 1N4148 0.1F 61.9k
fCLK 100kHz
LT1220 -15V 0.1F
LTC1164-8
VOUT
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LTC1164-8
APPLICATIONS INFORMATION
Passband Gain Dynamic Range filter's gain fCENTER with external resistors (Figure filter's center frequency (fCENTER) equal clock frequency divided 100. output dynamic range LTC1164-8 optimized minimum noise maximum voltage swing when resistor 61.9k. value resistor depends filter's gain calculated equation 340k/Gain. Table lists values some typical gains. Increasing filter's gain with resistor does increase noise generated filter. Table shows noise generated filter with input grounded.
Table Passband Gain Center Frequency,
GAIN 1000 (±1%) 340k 169k 68.1k 16.9k 6.81k 3.4k 1.69k (±1%) 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k GAIN (±1%) 340k 107k 60.4k 19.1k 10.7k 6.01k 3.4k 1.91k 1.07k (±1%) 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k 61.9k
340k 61.9k GAIN (dB) -0.50 fCENTER 1.00 0.50 -1.00 PERCENT DEVIATION FROM fCENTER fCENTER)
LTC1164-8
Table LTC1164-8 Noise with Input Grounded
POWER SUPPLY Single NOISE (VRMS) ±10% ±10%
passband LTC1164-8 from 0.995 fCENTER 1.005 fCENTER. passband's points typical filter gain ±2dB relative gain fCENTER. Figure shows typical passband gain variations versus percent frequency deviation from fCENTER. Outside filter's passband, signal attenuation increases 50dB frequencies less than 0.96 fCENTER greater than 1.04 fCENTER. applications where signal detected presence wideband noise, ultraselectivity LTC1164-8 improve output signal-to-noise ratio. When wideband noise (white noise) appears input
Figure Typical Passband Variations
filter, only small amount input noise will reach filter's output. output noise LTC1164-8 neglected, signal-to-noise ratio output filter divided signal-to-noise ratio input filter equals: (S/N)OUT/(S/N)IN (BW)IN/(BW)f where, (BW)IN noise bandwidth input filter (BW)f 0.01 fCENTER noise equivalent filter bandwidth Example: small 1kHz signal sent through cable that also conducts random noise. cable bandwidth 3.4kHz. LTC1164-8 used detect 1kHz signal. signal-to-noise ratio output filter 25.3dB larger than signal-to-noise ratio input filter Log(BW)IN/(BW)f Log3.4kHz/ 0.01 1kHz 1kHz 25.3dB). output swing with supplies ±4V, with single supply when AGND (Pins biased 2.5V. Table lists amps that recommended with LTC1164-8. LTC1164-8 designed specified dual single supply operation. filter's passband gain linearity optimum single supply with Pins (AGND) biased Filter operation ±7.5V supplies tested specified. 7.5V, filter will operate with center frequencies 7kHz. Please refer Passband Variations Power Supply graph Typical Performance Characteristics.
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LTC1164-8
APPLICATIONS INFORMATION
Table Recommended Amps LTC1164-8
SINGLE LT1006 LT1012 LT1077 DUAL LT1013 LT1078 LT1112 LT1413 QUAD LT1014 LT1079 LT1114
10mV/DIV
Aliasing filter's output, alias signals will appear when signals filter's input have substantial energy very near clock frequency multiples fCLK, fCLK, etc.). example, LTC1164-8 filter operates with 100kHz clock 99kHz, 10mV signal input, 1kHz, 10mV alias signal will appear filter's output. Table shows details.
Table Aliasing (fCLK 100kHz)
INPUT FREQUENCY 99.04kHz 100.96kHz) 99.02kHz 100.98kHz) 99.01kHz 100.99kHz) 99.005kHz 100.995Hz) 99.00kHz 101.00kHz) 98.995kHz 101.005kHz) 98.99kHz 101.01kHz) 98.98kHz 101.02kHz) 98.96kHz 101.04kHz) OUTPUT LEVEL (RELATIVE INPUT) 50dB 40dB ±2dB ±1dB ±2dB 40dB 50dB OUTPUT FREQUENCY (ALIAS FREQUENCY) 960Hz 980Hz 990Hz 995Hz 1000Hz 1005Hz 1010Hz 1020Hz 1040Hz
fCLK 500kHz fCENTER 5kHz 5ms/DIV
LTC1164-8
1V/DIV INPUT 20mV/DIV OUTPUT
2V/DIV
Clock Feedthrough
LT1006 fCLK 100kHz
5s/DIV
LTC1164-8
Figure Clock Feedthrough Output External With Capacitor Across Feedback Resistor With Capacitor Across Feedback Resistor 1/(2 fCENTER
Transient Response
OUTPUT
INPUT
Figure Square Wave Input (±2.5V)
OUTPUT
INPUT
fCLK 100kHz fCENTER 1kHz
50ms/DIV
LTC1164-8
Figure Sine Wave Burst Input
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LTC1164-8
APPLICATIONS INFORMATION
Printed Circuit Layout optimum filter performance, LTC1164-8 should operating printed circuit board that been laid precision analog signal processing circuits. printed circuit board, LTC1164-8 should surrounded with adequate analog signal ground plane power supply pins bypassed ground with 0.1F capacitors. ground plane LTC1164-8 digital ground plane should preferably meet single point system ground (star system ground). following external filter connections should inch less: Package Resistor Inverting Node External Ground Pins Package Resistor Inverting Node External Ground Pins signal power supply printed circuit traces should least inches away from above mentioned connections (this rule applies also routing printed circuit trace originating from clock source digital circuit terminating clock input LTC1164-8). Operating LTC1164-8 socket recommended.
TYPICAL APPLICATIONS
Tone Detector Average Value Circuit
340k 1N4148 0.1F LTC1164-8 0.1F 1N4148 61.9k 1N458
LT1413
fCLK 100kHz 0.1F
0.1F
VOUT AVERAGE [VPEAK fCENTER t)], ±10% FROM 1VP-P 7VP-P 340k/GAIN; fCENTER fCLK/100; 1/(2 fCENTER 1/(2 fCENTER/10; 1/(2 fCENTER/25;
100k
LT1413 100k
LT1413
1N458
LT1413
VOUT
LTC1164-8 TA03
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LTC1164-8
PACKAGE DESCRIPTION
0.300 0.325 (7.620 8.255)
0.009 0.015 (0.229 0.381) +0.025 0.325 -0.015 8.255 +0.635 -0.381 0.075 0.015 (1.905 0.381) 0.100 0.010 (2.540 0.254)
*THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED 0.010 INCH (0.254mm).
Dimensions inches (millimeters) unless otherwise noted.
Package 14-Lead PDIP (Narrow 0.300)
(LTC 05-08-1510)
0.770* (19.558)
0.255 0.015* (6.477 0.381)
0.130 0.005 (3.302 0.127) 0.015 (0.380)
0.045 0.065 (1.143 1.651)
0.065 (1.651) 0.125 (3.175) 0.018 0.003 (0.457 0.076)
0694
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LTC1164-8
PACKAGE DESCRIPTION
0.005 (0.127)
0.291 0.299 (7.391 7.595) (NOTE 0.010 0.029 (0.254 0.737)
0.009 0.013 (0.229 0.330)
NOTE 0.016 0.050 (0.406 1.270)
NOTE: IDENT, NOTCH CAVITIES BOTTOM PACKAGES MANUFACTURING OPTIONS. PART SUPPLIED WITH WITHOUT OPTIONS. THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED 0.006 INCH (0.15mm).
Information furnished Linear Technology Corporation believed accurate reliable. However, responsibility assumed use. Linear Technology Corporation makes representation that interconnection circuits described herein will infringe existing patent rights.
Dimensions inches (millimeters) unless otherwise noted.
Package 16-Lead Plastic Small Outline (Wide 0.300)
(LTC 05-08-1620)
0.398 0.413 (10.109 10.490) (NOTE
NOTE
0.394 0.419 (10.007 10.643)
0.093 0.104 (2.362 2.642)
0.037 0.045 (0.940 1.143)
0.050 (1.270)
0.004 0.012 (0.102 0.305)
0.014 0.019 (0.356 0.482)
SOL16 0392
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LTC1164-8
TYPICAL APPLICATION
Tone Detector Detecting Level Signal Buried Wideband Noise
fCLK 0.1F STROBE LTC1040
0.1F LTC1164-8
30.1k AGND (2V) 0.1F REF1 (1.9V) 8.87k REF2 (1V)
LT1413
0.1F
0.1F
RELATED PARTS
PART NUMBER LTC1064 LTC1164 LTC1264 DESCRIPTION Universal Filter Building Block Universal Filter Building Block Universal Filter Building Block COMMENTS This Part, with External Resistors, Allows Design Bandpass Filters Similar LTC1164-8 50kHz) This Part, with External Resistors, Allows Design Bandpass Filters Similar LTC1164-8 (Low Power 20kHz) This Part, with External Resistors, Allows Design Bandpass Filters Similar LTC1164-8 100kHz)
Table additional information
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7417 (408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com
10/09 PRINTED
LINEAR TECHNOLOGY CORPORATION 1995
OPTIMUM TONE DETECTION, SIGNAL'S FREQUENCY SHOULD FILTER'S PASSBAND WITHIN ±0.1% FROM fCENTER. VOUT, LOGIC HIGH SIGNAL VIN, LOGIC SIGNAL VIN. MINIMUM DETECTABLE SIGNAL VIN: VIN(MIN) 200mVRMS/GAIN. MAXIMUM NOISE SPECTRAL DENSITY VIN: 32mVRMS/[GAIN (BW)f] WHERE: (BW)f 0.01 fCENTER NOISE EQUIVALENT BANDWIDTH FILTER GAIN 340k/RIN FILTER GAIN fCENTER 340k/GAIN; fCENTER fCLK/100; 1/(2 fCENTER 1/(2 fCENTER/10; 1/(2 fCENTER/32
REF2
LT1413
0.1F
61.9k
REF1 1.9V
COMP1
COMP2
VOUT
LTC1164-8 TA04
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