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LTC1067C Datasheet(PDF) 1 Page - Linear Technology |
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LTC1067C Datasheet(HTML) 1 Page - Linear Technology |
1 / 20 page 1 LTC1067/LTC1067-50 Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block FEATURES DESCRIPTION The LTC ®1067/LTC1067-50 consist of two identical rail- to-rail, high accuracy and very wide dynamic range 2nd order switched-capacitor building blocks. Each building block, together with three to five resistors, provides 2nd order filter functions such as bandpass, highpass, lowpass, notch and allpass. High precision 4th order filters are easily designed. The center frequency of each 2nd order section is tuned by the external clock frequency. The internal clock-to-center frequency ratio (100:1 for the LTC1067 and 50:1 for the LTC1067-50) can be modified by the external resistors. These devices have a double sampled architecture which places aliasing and imaging components at twice the clock frequency. The LTC1067-50 is a low power device con- suming about one half the current of the LTC1067. The LTC1067-50’s typical supply current is about 1mA from a 3.3V supply. The LTC1067 and LTC1067-50 are available in 16-pin narrow SSOP and SO packages. Mask programmable versions of the LTC1067 and LTC1067-50, with thin film resistors on-chip and custom clock-to-cutoff frequency ratios, can be designed in an SO-8 package to realize application specific monolithic filters. Please contact LTC Marketing for more details. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION Frequency Response FREQUENCY (kHz) 8 12 1067 • TA02 9 10 11 0 –10 –20 –30 –40 0.1 µF 1067 TA01 LTC1067-50 V+ NC V+ SA LPA BPA HPA/NA INV A CLK AGND V– SB LPB BPB HPB/NB INV B 3.3V R32, 200k R22, 10k R31, 200k R21, 10k R11 200k IN RB1, 200k OUT 1 µF fCLK = 500kHz TOTAL OUTPUT NOISE: 90 µVRMS S/N RATIO: 80dB 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 s Rail-to-Rail Input and Output Operation s Operates from a Single 3V to ±5V Supply s Dual 2nd Order Filter in a 16-Lead SSOP Package s > 80dB Dynamic Range on Single 3.3V Supply s Clock-to-Center Frequency Ratio of 100:1 for the LTC1067 and 50:1 for the LTC1067-50 s Internal Sampling-to-Center Frequency Ratio of 200:1 for the LTC1067 and 100:1 for the LTC1067-50 s Center Frequency Error < ±0.2% Typ s Low Noise: < 40 µVRMS, Q ≤ 5 s Customizable with Internal Resistors APPLICATIONS s Notch Filters s Narrowband Bandpass Filters s Tone Detection s Noise Reduction Systems Single 3.3V Supply Rail-to-Rail, 4th Order, 10kHz Bandpass Filter |
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