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LTC1569IS8-7 Datasheet(PDF) 10 Page - Linear Technology |
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LTC1569IS8-7 Datasheet(HTML) 10 Page - Linear Technology |
10 / 12 page 10 LTC1569-7 Single 3V Operation, AC Coupled Input, 128kHz Cutoff Frequency 18 27 36 45 VOUT VIN 1 µF 3V REXT = 10k 1 µF 0.1 µF 2k 3.48k 3V 1569-7 TA02 LTC1569-7 IN+ IN– GND V– OUT V+ RX DIV/CLK fCUTOFF = n = 1, 4, 16 FOR PIN 5 AT GROUND, OPEN, V+ 128kHz n = 1 () 10k REXT () 18 27 36 45 VOUT VIN 1 µF 3V REXT = 10k 100pF 1 µF 2k 3.48k 3V 1569-7 TA04 LTC1569-7 IN+ IN– GND V– OUT V+ RX DIV/CLK fCUTOFF = n = 1, 4, 16 FOR PIN 5 AT GROUND, OPEN, V+ 128kHz n = 4 () 10k REXT () Single 3V Supply Operation, DC Coupled, 32kHz Cutoff Frequency Single 5V Operation, 300kHz Cutoff Frequency, DC Coupled Differential Inputs with Balanced Input Impedance 18 27 36 45 VOUT VIN + VIN – 1 µF 5V REXT = 4.1k 1 µF 27k 5V 1569-7 TA03 IN GND OUT LT ®1460-2.5 (SOT-23) LTC1569-7 fCUTOFF ~ n = 1, 4, 16 FOR PIN 5 AT GROUND, OPEN, V+ 128kHz n = 1 () 10k 4.1k () IN+ IN– GND V– OUT V+ RX DIV/CLK TYPICAL APPLICATIO S Single 3V, AC Coupled Input, 128kHz Cutoff Frequency FREQUENCY (Hz) 0 300k 80k 100k 160k 180k 240k 260k 120k 140k 200k 220k 280k 1569-7 TA02a 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 16 µs 14 µs 12 µs 140k 0 20k 80k 100k 40k 60k 120k every clock period. Therefore, the sampling frequency is twice the clock frequency and 64 times the filter cutoff frequency. Input signals with frequencies near 2 • fCLK ± fCUTOFF will be aliased to the passband of the filter and appear at the output unattenuated. Power Supply Current The power supply current depends on the operating mode. When the LTC1569-7 is in the divide-by-1 mode, or when clocked externally, the supply current is reduced by 50% for supply voltages below 4V. For the divide-by-4 and divide-by-16 modes, the supply current is reduced by 60% relative to the current when clocked externally, independent of the power supply voltage. Power supply current versus cutoff frequency for various operating modes is shown in the “Typical Performance Characteris- tics” section. APPLICATIONS INFORMATION |
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