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LTC2631AITS8-HM10 Datasheet(PDF) 11 Page - Linear Technology |
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LTC2631AITS8-HM10 Datasheet(HTML) 11 Page - Linear Technology |
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11 / 28 page  LTC2631 11 2631fb TIMING CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 4.5V to 5.5V. (See Figure 1) (Note 13). LTC2631-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8, LTC2631A-HM12/-HZ12 (VFS = 4.096V) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fSCL SCL Clock Frequency l 0 400 kHz tHD(STA) Hold Time (Repeated) Start Condition l 0.6 μs tLOW Low Period of the SCL Clock Pin l 1.3 μs tHIGH High Period of the SCL Clock Pin l 0.6 μs tSU(STA) Set-Up Time for a Repeated Start Condition l 0.6 μs tHD(DAT) Data Hold Time l 0 0.9 μs tSU(DAT) Data Set-Up Time l 100 ns tr Rise Time of Both SDA and SCL Signals (Note 12) l 20 + 0.1CB 300 ns tf Fall Time of Both SDA and SCL Signals (Note 12) l 20 + 0.1CB 300 ns tSU(STO) Set-Up Time for Stop Condition l 0.6 μs tBUF Bus Free Time Between a Stop and Start Condition l 1.3 μs 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 voltages are with respect to GND. Note 3: High temperatures degrade operating lifetimes. Operating lifetime is derated at temperatures greater than 105°C. Note 4: Linearity and monotonicity are defined from code kL to code 2N – 1, where N is the resolution and kL is given by kL = 0.016 • (2N/ VFS), rounded to the nearest whole code. For VFS = 2.5V and N = 12, kL = 26 and linearity is defined from code 26 to code 4,095. For VFS = 4.096V and N = 12, kL = 16 and linearity is defined from code 16 to code 4,095. Note 5: Inferred from measurement at code 16 (LTC2631-12), code 4 (LTC2631-10) or code 1 (LTC2631-8), and at full-scale. Note 6: This IC includes current limiting that is intended to protect the device during momentary overload conditions. Junction temperature can exceed the rated maximum during current limiting. Continuous operation above the specified maximum operating junction temperature may impair device reliability. Note 7: Digital inputs at 0V or VCC. Note 8: Guaranteed by design and not production tested. Note 9: Internal Reference mode. DAC is stepped 1/4 scale to 3/4 scale and 3/4 scale to 1/4 scale. Load is 2kΩ in parallel with 100pF to GND. Note 10: Temperature coefficient is calculated by dividing the maximum change in output voltage by the specified temperature range. Note 11: Maximum VIH = VCC(MAX) + 0.5V Note 12: CB = capacitance of one bus line in pF Note 13: All values refer to VIH = VIH(MIN) and VIL = VIL(MAX) levels. Note 14: Minimum VIL exceeds the Absolute Maximum rating. This condition won’t damage the IC, but could degrade performance. Note 15: Full-scale error is determined using the reference voltage measured at the REF pin. |
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