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LTC1992 数据表(PDF) 4 Page - Linear Technology |
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LTC1992 数据表(HTML) 4 Page - Linear Technology |
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4 / 24 page  LTC2369-18 4 236918fa ADC TIMING CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fSMPL Maximum Sampling Frequency l 1.6 Msps tCONV Conversion Time l 360 412 ns tACQ Acquisition Time tACQ = tCYC – tCONV – tBUSYLH (Note 10) l 200 ns tCYC Time Between Conversions l 625 ns tCNVH CNV High Time l 20 ns tBUSYLH CNV↑ to BUSY Delay CL = 20pF l 13 ns tCNVL Minimum Low Time for CNV (Note 11) l 20 ns tQUIET SCK Quiet Time from CNV↑ (Note 10) l 20 ns tSCK SCK Period (Notes 11, 12) l 10 ns tSCKH SCK High Time l 4ns The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) POWER REQUIREMENTS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VDD Supply Voltage l 2.375 2.5 2.625 V OVDD Supply Voltage l 1.71 5.25 V IVDD IOVDD IPD IPD Supply Current Supply Current Power Down Mode Power Down Mode 1.6Msps Sample Rate 1.6Msps Sample Rate (CL = 20pF) Conversion Done (IVDD + IOVDD + IREF, VREF > 2V) Conversion Done (IVDD + IOVDD + IREF, VREF > 2V, H-Grade) l l l 7.2 0.7 0.9 0.9 8.6 90 140 mA mA μA μA PD Power Dissipation Power Down Mode Power Down Mode 1.6Msps Sample Rate Conversion Done (IVDD + IOVDD + IREF, VREF > 2V) Conversion Done (IVDD + IOVDD + IREF, VREF > 2V, H-Grade) 18 2.25 2.25 21.5 225 315 mW μW μW The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) REFERENCE INPUT SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VREF Reference Voltage (Note 5) l 2.5 5.1 V IREF Reference Input Current (Note 9) l 0.85 1.1 mA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) DIGITAL INPUTS AND DIGITAL OUTPUTS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIH High Level Input Voltage l 0.8 • OVDD V VIL Low Level Input Voltage l 0.2 • OVDD V IIN Digital Input Current VIN = 0V to OVDD l –10 10 μA CIN Digital Input Capacitance 5pF VOH High Level Output Voltage IO = –500μA l OVDD – 0.2 V VOL Low Level Output Voltage IO = 500μA l 0.2 V IOZ Hi-Z Output Leakage Current VOUT = 0V to OVDD l –10 10 μA ISOURCE Output Source Current VOUT = 0V –10 mA ISINK Output Sink Current VOUT = OVDD 10 mA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) |
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