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LTC1864ACS8 Datasheet(PDF) 4 Page - Linear Technology |
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LTC1864ACS8 Datasheet(HTML) 4 Page - Linear Technology |
4 / 20 page 4 LTC1864/LTC1865 sn18645 18645fs LTC1864/LTC1865 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Supply Voltage 4.75 5.25 V fSCK Clock Frequency ● DC 20 MHz tCYC Total Cycle Time 16 • SCK + tCONV µs tSMPL Analog Input Sampling Time LTC1864 16 SCK LTC1865 14 SCK tsuCONV Setup Time CONV↓ Before First SCK↑ 30 ns (See Figure 1) thDI Hold Time SDI After SCK↑ LTC1865 15 ns tsuDI Setup Time SDI Stable Before SCK↑ LTC1865 15 ns tWHCLK SCK High Time fSCK = fSCK(MAX) 40% 1/fSCK tWLCLK SCK Low Time fSCK = fSCK(MAX) 40% 1/fSCK tWHCONV CONV High Time Between Data tCONV µs Transfer Cycles tWLCONV CONV Low Time During Data Transfer 16 SCK thCONV Hold Time CONV Low After Last SCK↑ 13 ns Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: All voltage values are with respect to GND. Note 3: Integral nonlinearity is defined as deviation of a code from a straight line passing through the actual endpoints of the transfer curve. The deviation is measured from the center of the quantization band. Note 4: Channel leakage current is measured while the part is in sample mode. The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. LTC1864/LTC1865 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS tCONV Conversion Time (See Figure 1) ● 2.75 3.2 µs fSMPL(MAX) Maximum Sampling Frequency ● 250 kHz tdDO Delay Time, SCK↓ to SDO Data Valid CLOAD = 20pF 15 20 ns ● 25 ns tdis Delay Time, CONV↑ to SDO Hi-Z ● 30 60 ns ten Delay Time, CONV↓ to SDO Enabled CLOAD = 20pF ● 30 60 ns thDO Time Output Data Remains CLOAD = 20pF ● 510 ns Valid After SCK↓ tr SDO Rise Time CLOAD = 20pF 8 ns tf SDO Fall Time CLOAD = 20pF 4 ns The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. VCC = 5V, VREF = 5V, fSCK = fSCK(MAX) as defined in Recommended Operating Conditions, unless otherwise noted. RECO E DED OPERATI G CO DITIO S TI I G CHARACTERISTICS |
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