LTC1063 DC Accurate, Clock-Tunable 5th Order Butterworth Lowpass Filter DESCRIPTIO FEATURES The LTC 1063 is the first monolithic filter providing both Clock-Tunable Cutoff Frequency clock-tunability, low DC output offset and over 12-bit DC 1mV DC Offset (Typical) 80dB CMRR (Typical) accuracy. The frequency response of the LTC1063 closely approximates a 5th order Butterworth polynomial. With Internal or External Clock appropriate PCB layout techniques the output DC offset is 50V Clock Feedthrough RMS 100:1 Clock-to-Cutoff Frequency Ratio typically 1mV and is constant over a wide range of clock frequencies. With 5V supplies and 4V input voltage 95V Total Wideband Noise RMS range, the CMR of the device is 80dB. 0.01% THD at 2V Output Level RMS 50kHz Maximum Cutoff Frequency The filter cutoff frequency is controlled either by an inter- Cascadable for Faster Roll-Off nal or external clock. The clock-to-cutoff frequency ratio is Operates from 2.375 to 8V Power Supplies 100:1. The on-board clock is power supply independent, Self-Clocking with 1 RC and it is programmed via an external RC. The 50V RMS Available in 8-Pin DIP and 16-Pin SO Wide Packages clock feedthrough is considerably reduced over existing U monolithic filters. APPLICATIO S The LTC1063 wideband noise is 95V , and it can RMS Audio process large AC input signals with low distortion. With Strain Gauge Amplifiers 7.5V supplies, for instance, the filter handles up to Anti-Aliasing Filters 4V (92dB S/N ratio) while the standard 1kHz THD is RMS Low Level Filtering below 0.02% 80dB dynamic ranges (S/N +THD) is ob- Digital Voltmeters tained with input levels between 1V and 2.3V . RMS RMS 60Hz Lowpass Filters The LTC1063 is available in 8-pin miniDIP and 16-pin SO Smoothing Filters wide packages. For a linear phase response, see LTC1065 Reconstruction Filters data sheet. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIO Frequency Response 10 2.5kHz 5th Order Lowpass Filter 0 1 8 V ** IN 10 2 7 20 V OUT LTC1063 30 3 6 5V 40 0.1F 4 5 5V 50 60 *19.1k 0.1F 200pF* 70 80 * SELF-CLOCKING SCHEME + 90 ** IF THE INPUT VOLTAGE CAN EXCEED V , 1 10 100 + CONNECT A SIGNAL DIODE BETWEEN PIN 1 AND V . FREQUENCY (kHz) 1063 TA01 1063 TA02 1063fa 1 GAIN (dB) U ULTC1063 ABSOLUTE MAXIMUM RATINGS (Note 1) + Total Supply Voltage (V to V ) .......................... 16.5V Operating Temperature Range ............... 40C to 85C Power Dissipation............................................. 400mW Storage Temperature Range ................ 65C to 150C + Voltage at Any Input .... (V 0.3V) V (V + 0.3V) Lead Temperature (Soldering, 10 sec)................. 300C IN Burn-In Voltage ...................................................... 16V PACKAGE/ORDER I FOR ATIO ORDER PART ORDER PART TOP VIEW TOP VIEW NUMBER NUMBER 16 NC 1 V ADJ OS V 1 8 V ADJ IN OS 15 V 2 NC IN LTC1063CN8 LTC1063CSW GND 2 7 V OUT 14 GND 3 V OUT + V 3 6 V 13 NC 4 NC CLK OUT 4 5 CLK IN + 12 V 5 V 11 NC 6 NC N8 PACKAGE 8-LEAD PLASTIC DIP 10 NC 7 NC T = 100C, = 110C/W (N) JMAX JA 9 CLK OUT 8 CLK IN J8 PACKAGE LTC1063CJ8 SW PACKAGE 8-LEAD CERAMIC DIP 16-LEAD PLASTIC SO WIDE LTC1063MJ8 T = 150C, = 100C/W (J) JMAX JA T = 100C, = 85C/W JMAX JA OBSOLETE PACKAGE Consider the N8 Package for Alternate Source Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: