LTC1059 High Performance Switched Capacitor Universal Filter U FEATURES DESCRIPTIO All Filter Parameters Guaranteed Over Temperature Wide Center Frequency Range (0.1Hz to 40kHz) Low Noise, Wide Dynamic Range Guaranteed Operation for 2.37V and 5V Supply Low Power Consumption Guaranteed Clock-to-Center Frequency Accuracy of 0.8% Guaranteed Low Offset Voltages Over Temperature Very Low Center Frequency and Q Tempco Clock Input T2L or CMOS Compatible Separate Highpass (or Notch or Allpass), Bandpass, Lowpass Outputs U APPLICATIO S The LTC(R)1059 consists of a general purpose, high performance, active filter building block and an uncommitted op amp. The filter building block together with an external clock and 2 to 5 resistors can produce various 2nd order functions which are available at its three output pins. Two out of three always provide lowpass and bandpass functions while the third output pin can produce notch or highpass or allpass. The center frequency of these functions can be tuned from 0.1Hz to 40kHz and is dependent on an external clock or an external clock and a resistor ratio. The filter can handle input frequencies up to 100kHz. The uncommitted op amp can be used to obtain additional allpass and notch functions, for gain adjustment or for cascading techniques. Higher than 2nd order filter functions can be obtained by cascading the LTC1059 with the LTC1060 dual universal filter or the LTC1061 triple universal filter. Any classical filter realization (such as Butterworth, Cauer, Bessel and Chebyshev) can be formed. Sinewave Oscillators Sweepable Bandpass/Notch Filters Full Audio Frequency Filters Tracking Filters , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS trademark of Linear Technology Corporation. The LTC1059 can be operated with single or dual supplies ranging from 2.37V to 8V (or 4.74V to 16V single supply). The LTC1059 is manufactured by using Linear Technology's enhanced LTCMOSTM silicon gate process. U TYPICAL APPLICATIO Wide Range 2nd Order Bandpass/Notch Filter with Q = 10 Center Frequency and Q Error 1.2 7.15k VIN DC-200kHz 50k 2 3 4 5 8V 6 7 BP LP CENTER FREQUENCY ERROR NORMALIZED TO 5kHz MEASUREMENT (%) 1 14 LTC1059 13 V02 N/AP/HP INV1 INV2 S1 AGND SA V- V + 50/100/HOLD LSh CLK 12 11 10 -8V 9 1.0 25 20 0.8 15 0.6 CENTER FREQUENCY ERROR 0.4 10 5 0.2 Q ERROR 0 8 30 TA = 25C CLOCK = 35.35 CENTER FREQUENCY 1 0 5 10 15 20 25 30 35 40 IDEAL CENTER FREQUENCY (kHz) DEVIATION FROM IDEAL Q OF 10 (%) NOTCH OUT BP OUT 50k 0 45 1058 TA01b T2L CLOCK IN 2MHz 1059 TA01a 1059fd 1 LTC1059 W W W AXI U U ABSOLUTE RATI GS U U W PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW Supply Voltage ........................................................ 18V Power Dissipation .............................................. 500mW Operating Temperature Range LTC1059C ................................... -40C TA 85C LTC1059AM, LTC1059M ........... -55C TA 125C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C ORDER PART NUMBER BP 1 14 LP N/AP/HP 2 13 V02 INV1 3 12 INV2 S1 4 11 AGND SA 5 10 V - V+ 6 9 50/100/HOLD LSh 7 8 CLK N PACKAGE 14-LEAD PDIP LTC1059CN LTC1059CS S PACKAGE 14-LEAD PLASTIC SO TJMAX = 110C, JA = 130C/W (N) TJMAX = 110C, JA = 110C/W (S) LTC1059ACJ LTC1059AMJ LTC1059CJ LTC1059MJ J PACKAGE 14-LEAD CERDIP TJMAX = 150C, JA = 80C/W OBSOLETE PACKAGE Consider the N or S Package for Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (Complete Filter) VS = 5V, T2L clock input level unless otherwise specified. PARAMETER CONDITIONS Center Frequency Range, f0 f0 * Q 400kHz, Mode 1 f0 * Q 1.6MHz, Mode 1 f0 * Q 250kHz, Mode 3, VS = 7.5V f0 * Q 1MHz, Mode 3, VS = 7.5V MIN Input Frequency Range TYP MAX UNITS 0.1 - 40k 0.1 - 18k 0.1 - 20k 0.1 - 16k Hz Hz Hz Hz 0 - 200k Hz Clock-to-Center Frequency Ratio Q Accuracy f0 Temperature Coefficient Q Temperature Coefficient DC Offset VOS1 VOS2 VOS2 VOS2 VOS2 VOS2 VOS2 VOS2 VOS2 VOS3 VOS3 VOS3 VOS3 Mode 1, 50:1, fCLK = 250kHz, Q = 10 Mode 1, 100:1, fCLK = 500kHz, Q = 10 Mode 1, 50:1 or 100:1, f0 = 5kHz Q = 10 Mode 1, fCLK < 500kHz Mode 1, fCLK < 500kHz, Q = 10 fCLK = 250kHz, 50:1, SA High (N Package) fCLK = 250kHz, 50:1, SA High (S Package) fCLK = 500kHz, 100:1, SA High (N Package) fCLK = 500kHz, 100:1, SA High (S Package) fCLK = 250kHz, 50:1, SA Low (N Package) fCLK = 250kHz, 50:1, SA Low (S Package) fCLK = 500kHz, 100:1, SA Low (N Package) fCLK = 500kHz, 100:1, SA Low (S Package) fCLK = 250kHz, 50:1 (N Package) fCLK = 250kHz, 50:1 (S Package) fCLK = 500kHz, 100:1 (N Package) fCLK = 500kHz, 100:1 (S Package) 50 0.8% 100 0.8% 0.5 5 5 15 2 3 3 6 6 2 2 4 4 2 2 4 4 % ppm/C ppm/C 15 30 40 60 80 20 30 40 60 20 30 40 60 mV mV mV mV mV mV mV mV mV mV mV mV mV 1059fd 2 LTC1059 ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (Complete Filter) VS = 5V, T2L Clock Input Level unless otherwise specified. PARAMETER CONDITIONS DC Lowpass Gain Accuracy Mode 1, R1 = R2 = 50k BP Gain Accuracy at f0 Mode 1, Q = 10, f0 = 5kHz MIN TYP MAX 0.1 2 UNITS % % 0.1 Clock Feedthrough fCLK 1MHz 10 mV Max Clock Frequency Mode 1, Q < 5, VS 5V 2 MHz Power Supply Current 3.5 5.5 7 mA mA TYP MAX UNITS (Complete Filter) VS = 2.37V unless otherwise specified. PARAMETER CONDITIONS Center Frequency Range f0 * Q 120kHz, Mode 1, 50:1 f0 * Q 120kHz, Mode 3, 50:1 MIN Input Frequency Range 0.1 - 12k 0.1 - 10k Hz Hz 60k Hz Clock-to-Center Frequency Ratio Mode 1, 50:1, fCLK = 250kHz, Q = 10 Mode 1, 100:1, fCLK = 250kHz, Q = 10 Q Accuracy 50 0.8% 100 0.8% Mode 1, fCLK = 250kHz, Q = 10 50:1 and 100:1 2 % Max Clock Frequency 700 kHz Power Supply Current 1.5 2.5 mA TYP MAX UNITS (Internal Op Amps) The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. PARAMETER CONDITIONS MIN Supply Voltage Range 2.375 8 V Voltage Swings VS = 5V, RL = 5k (Pins 1, 14) RL = 3.5k (Pins 2, 13) Input Offset Voltage Input Bias Current Output Short-Circuit Current Source/Sink VS = 5V (N Package) VS = 5V (S Package) 3.8 3.6 V V 4.2 1 15 mV 3 pA 40/3 25/3 mA mA DC Open Loop Gain VS = 5V 80 dB GBW VS = 5V 2 MHz Slew Rate VS = 5V 7 V/s Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. 1059fd 3 LTC1059 U W TYPICAL PERFOR A CE CHARACTERISTICS Graph 2. Mode 1: (fCLK/f0) Deviation vs Q Graph 1. Mode 1: (fCLK/f0) Deviation vs Q 0.8 0.3 VS = 5V 0.2 TA = 25C = 500kHz f 0.1 CLK -0.8 fCLK = 50 (TEST POINT) f0 -1.6 -2.0 0 - 0.1 - 0.2 - 0.3 - 0.4 -2.4 - 0.5 -2.8 - 0.6 1 10 - 0.7 0.1 100 10 Q = 10 5 Q ERR0R (%) 0 5 Q = 10 Graph 6. Mode 1: (fCLK/f0) vs fCLK and Q 0.8 TA = 25C 125C 0 -55C 20 fCLK = 50:1 f0 125C 50 85C TA = 25C Q = 50 Q = 20 Q = 10 -0.2 -0.4 0 0.2 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 Q=5 0 1.4 1.6 1059 G07 0.2 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 1.4 Graph 9. Mode 1: (fCLK/f0) vs fCLK and Temperature 1.0 VS = 5V Q = 10 0.8 fCLK = 100:1 f0 0.6 125C 0.4 85C TA = 25C 0.2 -0.2 0.2 -55C 0.4 0.6 1.6 1059 G06 1059 G05 0 Q=5 Q = 10 -0.4 DEVIATION FROM 100:1 (%) 0.4 Q = 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz) 1.0 0 0.2 Graph 8. Mode 1: (fCLK/f0) vs fCLK and Temperature VS = 5V TA = 25C fCLK = 50:1 f0 0.2 0.4 -55C Graph 7. Mode 1: (fCLK/f0) vs fCLK and Q 0.6 0.6 -0.2 0 1059 G04 0.8 VS = 5V TA = 25C fCLK = 100:1 f0 85C DEVIATION FROM 50:1 (%) Q ENHANCEMENT (%) VS = 5V Q = 10 20 fCLK = 100:1 f0 10 f CLK 100 = 50:1 f0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz) DEVIATION FROM 50:1 (%) 1060 G03 Graph 5. Mode 1: Measured Q vs fCLK and Temperature 10 fCLK = 50:1 f0 1060 G02 Graph 4. Mode 1: Q Error vs Clock Frequency 50-100 5 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz) IDEAL Q 20 VS = 2.5V VS = 5V Q = 20 Q = 10 100 5 20 50 20 100 1060 G01 20 0 0 1 IDEAL Q VS = 7.5V TA = 25C fCLK = 100:1 f0 TA = 25C VS = 2.5V VS = 5V fCLK Q = 10 20 f = 100:1 Q = 20 0 5 5 100 20 50 10 10 DEVIATION FROM 100:1 (%) -1.2 fCLK fCLK = 100 (TEST POINT) f0 Q ENHANCEMENT (%) -0.4 % DEVIATION (fCLK/f0 ) % DEVIATION (fCLK/f0 ) VS = 5V 0.4 TA = 25C = 250kHz f 0 CLK -3.2 0.1 Graph 3. Mode 1: Q Error vs Clock Frequency 0.8 1.0 1.2 fCLK (MHz) 1.4 1.6 VS = 5V Q = 10 0.8 fCLK = 50:1 f0 0.6 125C 0.4 85C TA = 25C 0.2 -55C 0 1.8 1059 G08 -0.2 0.2 0.4 0.6 0.8 1.0 1.2 fCLK (MHz) 1.4 1.6 1.8 1059 G09 1059fd 4 LTC1059 U W TYPICAL PERFOR A CE CHARACTERISTICS Graph 10. Mode 1: (fCLK/f0) vs fCLK and Q 0.4 0.2 Q = 50 0 Q = 20 Q = 10 Q=5 -0.2 0 0.1 0.4 0.2 Q = 50 Q = 20 0 Q = 10 0.3 0.4 0.5 fCLK (MHz) 0.2 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 fCLK (MHz) 0.6 0.7 NOTCH DEPTH (dB) DEVIATION FROM 50:1 (%) 100 -55C TA = 25C 85C 125C 0.2 0 0.4 1.0 0.6 0.8 fCLK (MHz) 0.4 Q = 10 100:1 VS = 5V TA = 25C VIN = 1VRMS Q=1 100:1 80 60 Q = 10 50:1 40 1.2 0 0.2 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 1.4 0.1 fCLK = 50:1 f0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz) 1059 G16 0 - 0.1 (A) fCLK fCLK = 200:1 f0 R2 = 2 R4 - 0.2 - 0.3 (B) - 0.4 - 0.5 - 0.6 0.1 1.6 1 10 100 1059 G15 Graph 18. Mode 3 (R2 = R4): Measured Q vs fCLK and Temperature Q = 10 50 VS = 5V Q = 10 20 fCLK = 100:1 f0 5 10 Q ERR0R (%) VS = 2.5V VS = 5V Q = 10 5 50 Q = 10 5 20 Q ENHANCEMENT (%) Q ENHANCEMENT (%) 0 fCLK fCLK = 500:1 f0 R2 = 5 R4 0.2 Graph 17. Mode 3 (R2 = R4): Q Error vs Clock Frequency VS = 7.5V TA = 25C 20 fCLK = 100:1 f0 0 Q = 10 20 10 0 50 1.2 VS = 5V TA = 25C PIN 9 AT 100:1 0.3 1059 G14 Graph 16. Mode 3: Q Error vs Clock Frequency 10 1.0 IDEAL Q 1059 G13 TA = 25C VS = 2.5V VS = 5V fCLK = 100:1 Q = 10 f0 Q = 10 50 5 5 20 0.6 0.8 fCLK (MHz) 1059 * G12 0 0.2 0.4 0.2 Graph 15. Mode 3: Deviation of (fCLK/f0) with Respect to Q = 10 Measurement 20 -0.2 0 0 0.8 Graph 14. Mode 1: Notch Depth vs Clock Frequency 0.4 10 -55C 0.2 1059 G11 120 VS = 2.5V Q = 10 0.8 fCLK = 50:1 f0 20 125C -0.2 -0.4 1.0 20 TA = 25C 0.4 Q=5 Graph 13. Mode 1: (fCLK/f0) vs fCLK and Temperature 0 85C 0.6 0 -0.2 1059 G10 0.6 VS = 2.5V Q = 10 fCLK = 100:1 f0 0.8 DEVIATION FROM 100:1 (%) 0.6 1.0 VS = 2.5V TA = 25C 0.6 fCLK = 50:1 f0 DEVIATION FROM 50:1 (%) 0.8 DEVIATION FROM 100:1 (%) 0.8 VS = 2.5V TA = 25C fCLK = 100:1 f0 DEVIATION OF (fCLK/f0 ) WITH RESPECT TO Q = 10 MEASUREMENT (%) 1.0 Graph 12. Mode 1: (fCLK/f0) vs fCLK and Temperature Graph 11. Mode 1: (fCLK/f0) vs fCLK and Q 5 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz) 1059 G17 85C TA = 25C -55C 0 125C 20 0 fCLK = 50:1 f0 125C 85C TA = 25C -55C fCLK = 50:1 f0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz) 1059 G18 1059fd 5 LTC1059 U W TYPICAL PERFOR A CE CHARACTERISTICS Graph 20. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Q 0.8 VS = 5V TA = 25C fCLK = 100:1 f0 0.6 0.4 0.2 Q = 20 0 Q = 10 -0.2 1.0 VS = 5V TA = 25C fCLK = 50:1 f0 0.6 DEVIATION FROM 50:1 (%) 0.4 0.2 Q = 50 0 Q = 20 Q = 10 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 1.4 1.6 0 0.2 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 1.4 1059 G19 0.6 85C 0.4 1.6 TA = 25C -55C 125C 0.2 1.4 1.6 TA = 25C 85C 0.4 -55C 0.2 0 1.8 VS = 2.5V Q = 10 0.6 fCLK = 50:1 f0 85C TA = 25C 0.4 -55C 125C 0.2 0 -0.4 0 0.2 0.4 1.0 0.6 0.8 fCLK (MHz) 1.2 0 0.2 0.4 0.6 0.8 fCLK (MHz) 1.0 1.2 1059 G24 1059 G23 Graph 26. Supply Current vs Supply Voltage MODE 2 R2 = R4 Q = 20 10 MODE 1C Q = 20 Q = 10 0 MODE 2 R2 = R4 Q = 20 MODE 1C Q = 20 Q = 10 fCLK = 35.35:1 f0 9 POWER SUPPLY CURRENT (mA) Q ENHANCEMENT (%) 1.8 10 VS = 5V TA = 25C 20 fCLK = 70.7:1 f0 0 1.6 -0.2 Graph 25. Mode 1c (R5 = 0), Mode 2 (R2 = R4): Q Error vs Clock Frequency 10 1.4 1059 G21 125C 1059 G22 20 0.8 1.0 1.2 fCLK (MHz) 0.8 VS = 2.5V Q = 10 0.6 fCLK = 100:1 f0 -0.4 0.8 1.0 1.2 fCLK (MHz) 0.6 0.4 Graph 24. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Temperature -0.2 0 0.6 -0.2 0.2 0.8 VS = 5V Q = 10 0.8 fCLK = 50:1 f0 DEVIATION FROM 100:1 (%) DEVIATION FROM 50:1 (%) -55C Graph 23. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Temperature 1.0 8 7 TA = -55C TA = 25C 6 5 4 TA = 125C 3 2 1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz) 1059 G25 6 0.2 1059 G20 Graph 22. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Temperature 0.4 TA = 25C 0.4 0 -0.4 -0.2 0.2 85C Q=5 -0.4 0.2 125C 0.6 -0.2 Q=5 0 VS = 5V Q = 10 0.8 fCLK = 100:1 f0 DEVIATION FROM 50:1 (%) DEVIATION FROM 100:1 (%) 0.8 Graph 21. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Temperature DEVIATION FROM 100:1 (%) Graph 19. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Q 0 1 2 3 4 5 6 7 8 9 10 POWER SUPPLY VOLTAGE (V) 1059 G26 1059fd LTC1059 W BLOCK DIAGRA V- N/AP/HP S1 10 2 4 + INV1 3 + V+ BP LP 6 1 14 - - - AGND 11 SA 5 CLK 8 LEVEL SHIFT NON-OVERLAP CLOCK INV2 12 LSh 7 + 13 VO2 50/100/HOLD 9 CONTROL - AGND 1059 BD U W U U APPLICATIO S I FOR ATIO The LTC1059 is compatible with the LTC1060. All the LTC1059 pins are functionally equivalent to the LTC1060 pins bearing the same title. For a detailed pin description and definition of various modes of operation refer to the LTC1060 data sheet. The LTC1059 is typically "faster" than the LTC1060 especially under single 5V (or 2.5V) supply operation. This becomes apparent through the Typical Performance Characteristics of the part. All the graphs shown in this data sheet have been drawn under the same test conditions as in the LTC1060 data sheet; they are also numbered in the same order. For complete discussion of the filter characteristics see the LTC1060 data sheet. U PACKAGE DESCRIPTIO J Package 14-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) .005 (0.127) MIN .785 (19.939) MAX 14 13 12 11 10 9 8 .220 - .310 (5.588 - 7.874) .025 (0.635) RAD TYP 1 2 3 4 5 6 7 .200 (5.080) MAX .300 BSC (7.62 BSC) .015 - .060 (0.381 - 1.524) .008 - .018 (0.203 - 0.457) 0 - 15 .045 - .065 (1.143 - 1.651) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS .014 - .026 (0.360 - 0.660) .100 (2.54) BSC .125 (3.175) MIN J14 0801 OBSOLETE PACKAGE 1059fd 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. 7 LTC1059 U PACKAGE DESCRIPTIO N Package 14-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .770* (19.558) MAX 14 13 12 11 10 9 8 1 2 3 4 5 6 7 .255 .015* (6.477 0.381) .300 - .325 (7.620 - 8.255) .045 - .065 (1.143 - 1.651) .130 .005 (3.302 0.127) .020 (0.508) MIN .065 (1.651) TYP .008 - .015 (0.203 - 0.381) +.035 .325 -.015 ( 8.255 +0.889 -0.381 .005 (0.125) .100 MIN (2.54) BSC .120 (3.048) MIN ) NOTE: 1. DIMENSIONS ARE .018 .003 (0.457 0.076) INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) N14 1002 S Package 14-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .337 - .344 (8.560 - 8.738) NOTE 3 .045 .005 .050 BSC 14 N 12 11 10 9 8 N .245 MIN .160 .005 .150 - .157 (3.810 - 3.988) NOTE 3 .228 - .244 (5.791 - 6.197) 1 .030 .005 TYP 13 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .010 - .020 x 45 (0.254 - 0.508) 2 3 4 5 .053 - .069 (1.346 - 1.752) .008 - .010 (0.203 - 0.254) .014 - .019 (0.355 - 0.483) TYP NOTE: 1. DIMENSIONS IN INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 7 .004 - .010 (0.101 - 0.254) 0 - 8 TYP .016 - .050 (0.406 - 1.270) 6 .050 (1.270) BSC S14 0502 1059fd 8 Linear Technology Corporation LW/TP 0103 1K REV D * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2001