LTC2255/LTC2254 W UTI I G CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperaturerange, otherwise specifications are at TA = 25 ° C. (Note 4)LTC2255LTC2254SYMBOLPARAMETERCONDITIONSMINTYPMAXMINTYPMAXUNITS fs Sampling Frequency (Note 9) ● 1 125 1 105 MHz tL CLK Low Time Duty Cycle Stabilizer Off ● 3.8 4 500 4.5 4.76 500 ns Duty Cycle Stabilizer On ● 3 4 500 3 4.76 500 ns (Note 7) tH CLK High Time Duty Cycle Stabilizer Off ● 3.8 4 500 4.5 4.76 500 ns Duty Cycle Stabilizer On ● 3 4 500 3 4.76 500 ns (Note 7) tAP Sample-and-Hold 0 0 ns Aperture Delay tD CLK to DATA delay CL = 5pF (Note 7) ● 1.4 2.7 5.4 1.4 2.7 5.4 ns Data Access Time CL = 5pF (Note 7) ● 4.3 10 4.3 10 ns After OE↓ BUS Relinquish Time (Note 7) ● 3.3 8.5 3.3 8.5 ns Pipeline Latency 5 5 Cycles Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 5: Integral nonlinearity is defined as the deviation of a code from a may cause permanent damage to the device. Exposure to any Absolute straight line passing through the actual endpoints of the transfer curve. Maximum Rating condition for extended periods may affect device The deviation is measured from the center of the quantization band. reliability and lifetime. Note 6: Offset error is the offset voltage measured from –0.5 LSB when Note 2: All voltage values are with respect to ground with GND and OGND the output code flickers between 00 0000 0000 0000 and wired together (unless otherwise noted). 11 1111 1111 1111. Note 3: When these pin voltages are taken below GND or above VDD, they Note 7: Guaranteed by design, not subject to test. will be clamped by internal diodes. This product can handle input currents Note 8: VDD = 3V, fSAMPLE = 125MHz (LTC2255) or 105MHz (LTC2254), of greater than 100mA below GND or above VDD without latchup. input range = 1VP-P with differential drive. Note 4: VDD = 3V, fSAMPLE = 125MHz (LTC2255) or 105MHz (LTC2254), Note 9: Recommended operating conditions. input range = 2VP-P with differential drive, clock duty cycle stabilizer on, unless otherwise noted. 22554fa 5
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