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LTC2256CUJ-14-PBF Datasheet(PDF) 7 Page - Linear Technology |
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LTC2256CUJ-14-PBF Datasheet(HTML) 7 Page - Linear Technology |
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7 / 32 page  7 225814p LTC2258-14 LTC2257-14/LTC2256-14 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Digital Data Outputs (LVDS Mode) tD ENC to Data Delay CL = 5pF (Note 8) l 1.1 1.8 3.2 ns tC ENC to CLKOUT Delay CL = 5pF (Note 8) l 1 1.5 2.7 ns tSKEW DATA to CLKOUT Skew tD – tC (Note 8) l 0 0.3 0.6 ns Pipeline Latency 5.5 Cycles SPI Port Timing (Note 8) tSCK SCK Period Write Mode Readback Mode, CSDO = 20pF, RPULLUP = 2k l l 40 250 ns ns tS CS to SCK Setup Time l 5ns tH SCK to CS Setup Time l 5ns tDS SDI Setup Time l 5ns tDH SDI Hold Time l 5ns tDO SCK Falling to SDO Valid Readback Mode, CSDO = 20pF, RPULLUP = 2k l 125 ns TIMING CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All voltage values are with respect to GND with GND and OGND shorted (unless otherwise noted). Note 3: When these pin voltages are taken below GND or above VDD, they will be clamped by internal diodes. This product can handle input currents of greater than 100mA below GND or above VDD without latchup. Note 4: When these pin voltages are taken below GND they will be clamped by internal diodes. When these pin voltages are taken above VDD they will not be clamped by internal diodes. This product can handle input currents of greater than 100mA below GND without latchup. Note 5: VDD = OVDD = 1.8V, fSAMPLE = 125MHz (LTC2261), 105MHz (LTC2260), or 80MHz (LTC2259), LVDS outputs with internal termination disabled, differential ENC+/ENC– = 2VP-P sine wave, input range = 2VP-P with differential drive, unless otherwise noted. Note 6: Integral nonlinearity is defined as the deviation of a code from a best fit straight line to the transfer curve. The deviation is measured from the center of the quantization band. Note 7: Offset error is the offset voltage measured from –0.5 LSB when the output code flickers between 00 0000 0000 0000 and 11 1111 1111 1111 in 2’s complement output mode. Note 8: Guaranteed by design, not subject to test. Note 9: VDD = 1.8V, fSAMPLE = 125MHz (LTC2261), 105MHz (LTC2260), or 80MHz (LTC2259), ENC+ = single-ended 1.8V square wave, ENC– = 0V, input range = 2VP-P with differential drive, 5pF load on each digital output unless otherwise noted. Note 10: Recommended operating conditions. TIMING DIAGRAMS Full-Rate CMOS Output Mode Timing All Outputs are Single-Ended and Have CMOS Levels tH tD tC tL N – 5 N – 4 N – 3 N – 2 N – 1 tAP N + 1 N + 2 N + 4 N + 3 N ANALOG INPUT ENC– ENC+ CLKOUT+ CLKOUT– D0-D13, OF 225814 TD01 |
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