LTC1066-1CSW#PBF Analog Devices

LTC1066-1 14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter DESCRIPTIO FEATURES DC Gain Linearity: 14 Bits The LTC 1066-1 is an 8th order elliptic lowpass filter Maximum DC Offset: 1.5mV which simultaneously provides clock-tunability and DC DC Offset TempCo: 7V/C accuracy. The unique and proprietary architecture of the Device Fully Tested at f = 80kHz filter allows 14 bits of DC gain linearity and a maximum of CUTOFF Maximum Cutoff Frequency: 120kHz (V = 8V) 1.5mV DC offset. An external RC is required for DC S Drives 1k Load with 0.02% THD or Better accurate operation. With 7.5V supplies, a 20k resistor Signal-to-Noise Ratio: 90dB and a 1F capacitor, the cutoff frequency can be tuned Input Impedance: 500M from 800Hz to 100kHz. A clock-tunable 10Hz to 100kHz Selectable Elliptic or Linear Phase Response operation can also be achieved (see Typical Application Operates from Single 5V up to 8V Power Supplies section). Available in an 18-Pin SO Wide Package The filter does not require any external active components such as input/output buffers. The input/output impedance U APPLICATIO S is 500M /0.1 and the output of the filter can source or + sink 40mA. When pin 8 is connected to V , the clock-to- Instrumentation cutoff frequency ratio is 50:1 and the input signal is Data Acquisition Systems sampled twice per clock cycle to lower the risk of aliasing. Anti-Aliasing Filters For frequencies up to 0.75f , the passband ripple is CUTOFF Smoothing Filters 0.15dB. The gain at f is 1dB and the filters CUTOFF Audio Signal Processing stopband attenuation is 80dB at 2.3f . Linear phase CUTOFF , LTC and LT are registered trademarks of Linear Technology Corporation. operation is also available with a clock-to-cutoff frequency All other trademarks are the property of their respective owners. ratio of 100:1 when pin 8 is connected to ground. The LTC1066-1 is available in an 18-pin SO Wide package. TYPICAL APPLICATIO Clock-Tunable, DC Accurate, 800Hz to 80kHz Elliptic Lowpass Filter Amplitude Response 20k 10 0 1F 1 18 + 10 OUT A V 7.5V f = 80kHz C 2 17 20 IN A OUT B V OUT 16 V = 3 OS(OUT) 30 V +IN A +IN B IN 2.5mV f = 800Hz MAX C 4 15 40 7.5V V GND LTC1066-1 5 14 + 50 7.5V V FILTER IN SHORT CONNECTION UNDER 30k 6 13 60 IC AND SHIELDED BY A CONNECT 1 COMP 2 GROUND PLANE 7 12 70 FILTER CONNECT 2 15pF OUT BYPASS THE POWER SUPPLIES 8 11 WITH 0.1F DISC CERAMIC 50/100 COMP 1 80 9 10 40kHz f 4MHz CLK V 7.5V 90 CLK 100 1k 10k 100k 1M FREQUENCY (Hz) 1066-1 TA01 1066-1 TA02 10661fa 1 GAIN (dB) U ULTC1066-1 ABSOLUTE AXI U RATI GS / PACKAGE ORDER I FOR ATIO (Note 1) TOP VIEW ORDER PART + + Total Supply Voltage (V to V ) .......................... 16.5V OUT A 1 18 V NUMBER IN A 2 17 OUT B Power Dissipation............................................. 700mW +IN A 3 16 +IN B Burn-In Voltage ................................................... 16.5V V 15 LTC1066-1CSW 4 GND + + Voltage at Any Input ..... (V 0.3V) V (V + 0.3V) V 5 14 FILTER IN IN CONNECT 1 6 13 COMP 2 Maximum Clock Frequency FILTER 7 12 CONNECT 2 OUT V = 8V ....................................................... 6.1MHz S 50/100 8 11 COMP 1 CLK 10 V = 7.5V .................................................... 5.4MHz 9 V S V = 5V ....................................................... 4.1MHz SW PACKAGE S 18-LEAD PLASTIC SO WIDE V = Single 5V ............................................... 1.8MHz T = 110C, = 75C/W S JMAX JA Operating Temperature Range* .................. 0C to 70C Order Options Tape and Reel: Add TR Storage Temperature Range ................. 65C to 150C Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Temperature (Soldering, 10 sec).................. 300C Lead Free Part Marking: