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LTC1853 数据表(PDF) 5 Page - Linear Technology |
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LTC1853 数据表(HTML) 5 Page - Linear Technology |
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5 / 24 page ![]() LTC1852/LTC1853 5 18523fa POWER REQUIREMENTS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VDD Analog Positive Supply Voltage (Note 10) ● 2.7 5.5 V OVDD Output Positive Supply Voltage (Note 10) ● 2.7 5.5 V IDD Positive Supply Current VDD = OVDD = 5V, fS = 400kHz VDD = OVDD = 2.7V, fS = 250kHz ● ● 2 0.83 3 1.33 mA mA PDISS Power Dissipation VDD = OVDD = 5V, fS = 400kHz VDD = OVDD = 2.7V, fS = 250kHz ● ● 10 2.25 15 4 mW mW IDDPD Power Down Positive Supply Current Nap Mode Sleep Mode SHDN = Low, CS = Low SHDN = Low, CS = High 0.5 20 mA μA Power Down Power Dissipation Nap Mode Sleep Mode VDD = VDD = OVDD = 5V, fS = 400kHz SHDN = Low, CS = Low SHDN = Low, CS = High 2.5 0.1 mW mW Power Down Power Dissipation Nap Mode Sleep Mode VDD = VDD = OVDD = 3V, fS = 250kHz SHDN = Low, CS = Low SHDN = Low, CS = High 1.5 0.06 mW mW TIMING CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fSAMPLE(MAX) Maximum Sampling Frequency VDD = 5.5V VDD = 2.7V ● ● 400 250 kHz kHz Acquisition + Conversion VDD = 5.5V VDD = 2.7V ● ● 2.5 4.0 μs μs tCONV Conversion Time VDD = 5.5V VDD = 2.7V ● ● 2.0 3.5 μs μs tACQ Acquisition Time (Note 13) ● 150 ns t1 CS to RD Setup Time (Notes 9, 10) ● 0ns t2 CS to CONVST Setup Time (Notes 9, 10) ● 10 ns t3 CS to SHDN Setup Time (Notes 9, 10) 200 ns t4 SHDN to CONVST Wake-Up Time Nap Mode (Note 10) Sleep Mode (Note 10) 200 10 ns ms t5 CONVST Low Time (Notes 10, 11) ● 50 ns t6 CONVST to BUSY Delay CL = 25pF ● 10 60 ns ns t7 Data Ready Before BUSY ● 20 15 35 ns ns t8 Delay Between Conversions (Note 10) ● 50 ns t9 Wait Time RD After BUSY ● –5 ns t10 Data Access Time After RD CL = 25pF ● 20 35 45 ns ns CL = 100pF ● 25 45 60 ns ns t11 BUS Relinquish Time 0°C to 70°C – 40°C to 85°C ● ● 10 30 35 40 ns ns ns t12 RD Low Time ● t10 ns |
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