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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC2972 датащи(PDF) 7 Page - Linear Technology |
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LTC2972 датащи(HTML) 7 Page - Linear Technology |
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7 / 112 page  LTC2972 7 2972fa For more information www.linear.com/LTC2972 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. VPWR = VIN_SNS = 12V, VDD33 = VDDIO, VDD33, VDD25, REFP and REFM pins floating, unless otherwise indicated. CVDD33 = 100nF, CVDD25 = 100nF, CVIN_SNS_CAP = 10nF and CREF = 100nF. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS COUT Output Capacitance VDACn Hi-Z 10 pF tS_VDAC DAC Output Update Rate Fast Servo Mode 500 µs Voltage Supervisor Characteristics VIN_VS Input Voltage Range (Programmable) VIN_VS = (VSENSEPn – VSENSEMn) Low Resolution Mode High Resolution Mode l l 0 0 6 3.8 V V Single-Ended Voltage: VSENSEMn l –0.1 0.1 V N_VS Voltage Sensing Resolution 0V to 3.8V Range: High Resolution Mode 4 mV/LSB 0V to 6V Range: Low Resolution Mode 8 mV/LSB TUE_VS Total Unadjusted Error 2V ≤ VIN_VS ≤ 6V, Low Resolution Mode l ±1.25 % of Reading VIN_VS ≤ 2V, Low Resolution Mode ±25 mV 1.5V < VIN_VS ≤ 3.8V, High Resolution Mode l ±1.0 % of Reading 0.8V ≤ VIN_VS ≤ 1.5V, High Resolution Mode l ±1.5 % of Reading VIN_VS ≤ 0.8V, High Resolution Mode ±12 mV tS_VS Update Rate 12.21 µs VIN_SNS Input Characteristics VIN_SNS VIN_SNS Input Voltage Range (Note 9) l 0 15 V IVIN_SNS VIN_SNS Input Current VVIN_SNS = 4.5V l 80 140 200 µA VVIN_SNS = 12V l 150 250 350 µA VVIN_SNS = 15V l 180 300 420 µA TUEVIN_SNS VIN_ON, VIN_OFF Threshold Total Unadjusted Error 4.5V ≤ VVIN_SNS ≤ 8V l ±2.0 % of Reading VVIN_SNS > 8V l ±1.0 % of Reading TUE_VIN READ_VIN Total Unadjusted Error 4.5V ≤ VVIN_SNS ≤ 15V (Note 9) l ±0.5 % of Reading DAC Soft-Connect Comparator Characteristics VOS_CMP Offset Voltage VDACPn = 0.2V l ±1 ±18 mV VDACPn = 1.3V l ±2 ±26 mV VDACPn = 2.65V l ±3 ±52 mV Input Current Sense Characteristics VIIN Common Mode Input Range VIIN_SNSP = VIIN_SNSM (Note 9) l 4.5 15 V IIIN IIIN_SNSP, IIIN_SNSM Input Current VIIN_SNSP = VIIN_SNSM = VIIN_SNS (Note 2) l 0.5 2 µA FS_IIN Full-Scale Input Current Sense Voltage Range Referred to (VIIN_SNSP – VIIN_SNSM) High Range Medium Range Low Range l l l –100 –50 –20 100 50 20 mV mV mV TUE_IIN Total Unadjusted Error |VIIN_SNSP – VIIN_SNSM| = 100mV, High Range |VIIN_SNSP – VIIN_SNSM| = 50mV, Medium Range |VIIN_SNSP – VIIN_SNSM| = 20mV, Low Range l l l ±0.6 ±0.65 ±0.75 % of Reading % of Reading % of Reading |VIIN_SNSP – VIIN_SNSM| = 20mV, High Range |VIIN_SNSP – VIIN_SNSM| = 15mV, Medium Range |VIIN_SNSP – VIIN_SNSM| = 10mV, Low Range l l l ±1 ±1 ±1 % of Reading % of Reading % of Reading |VIIN_SNSP – VIIN_SNSM| = 0mV, High Range |VIIN_SNSP – VIIN_SNSM| = 0mV, Medium Range |VIIN_SNSP – VIIN_SNSM| = 0mV, Low Range l l l ±100 ±75 ±50 µV µV µV |
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