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LTC2640ACTS8-HZ12 Datasheet(PDF) 9 Page - Linear Technology |
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LTC2640ACTS8-HZ12 Datasheet(HTML) 9 Page - Linear Technology |
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9 / 24 page  LTC2640 9 2640fb ELECTRICAL 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, VOUT unloaded unless otherwise specified. LTC2640-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8, LTC2640A-HM12/-HZ12 (VFS = 4.096V) 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 8). LTC2640-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8, LTC2640A-HM12/-HZ12 (VFS = 4.096V) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS t1 SDI Valid to SCK Setup l 4ns t2 SDI Valid to SCK Hold l 4ns t3 SCK High Time l 9ns t4 SCK Low Time l 9ns t5 CS/LD Pulse Width l 10 ns t6 LSB SCK High to CS/LD High l 7ns t7 CS/LD Low to SCK High l 7ns t9 CLR Pulse Width l 20 ns t10 CS/LD High to SCK Pos. Edge l 7ns SCK Frequency 50% Duty Cycle l 50 MHz 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 (LTC2640-12), code 4 (LTC2640-10) or code 1 (LTC2640-8), 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 2k 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: Full-scale error is determined using the reference voltage measured at the REF pin. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS en Output Voltage Noise Density At f = 1kHz, External Reference At f = 10kHz, External Reference At f = 1kHz, Internal Reference At f = 10kHz, Internal Reference 140 130 210 200 nV√Hz nV√Hz nV√Hz nV√Hz Output Voltage Noise 0.1Hz to 10Hz, External Reference 0.1Hz to 10Hz, Internal Reference 0.1Hz to 200kHz, External Reference 0.1Hz to 200kHz, Internal Reference, CREF = 0.33μF 20 20 650 670 μVP-P μVP-P μVP-P μVP-P |
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