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LTC2972 Datasheet(PDF) 8 Page - Linear Technology |
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LTC2972 Datasheet(HTML) 8 Page - Linear Technology |
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8 / 112 page  LTC2972 8 2972fa For more information www.linear.com/LTC2972 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS CMRR_IIN DC CMRR 4.5V ≤ VIIN_SNSP = VIIN_SNS ≤ 15V |VIIN_SNSP – VIIN_SNSM| = 100mV High Range l 85 dB AC CMRR VIIN_SNSP = VIIN_SNS= 12V ± 100mV f = 62.5kHz 85 dB tCONV_IIN Conversion Time 25 ms tUPDATE Update Rate 5.4 Hz External Temperature Sensor Characteristics (READ_TEMPERATURE_1) tCONV_TSENSE Conversion Time For One Channel, (Total Latency for Both Channels Is 2 • 66ms) 66 ms ITSENSE_HI TSENSE High Level Current l –90 –64 –40 µA ITSENSE_LOW TSENSE Low Level Current l –5.5 –4 –2.5 µA TUE_TS Total Unadjusted Error Ideal Diode Assumed ±3 °C N_TS Maximum Ideality Factor READ_TEMPERATURE_1 = 175°C MFR_TEMP_1_GAIN = 1/N_TS 1.10 Internal Temperature Sensor Characteristics (READ_TEMPERATURE_2) TUE_TS2 Total Unadjusted Error ±1 °C VOUT Enable Output (VOUT_EN [1:0]) Characteristics IVOUT_ENn Output Sinking Current Strong Pull-Down Enabled, VVOUT_ENn = 0.4V l 3 5 8 mA VVOUT_ENn = 0.4V l 33 50 65 µA Output Leakage Current 0V ≤ VVOUT_ENn ≤ 15V l ±20 µA VVOUT_VALID Minimum VDD33 when VOUT_ENn Valid VVOUT_ENn ≤ 0.4V l 1.1 V General Purpose Output (AUXFAULTB) Characteristics IAUXFAULTB Output Sinking Current Strong Pull-Down Enabled, VAUXFAULTB = 0.4V l 3 5 8 mA Output Leakage Current 0V ≤ VAUXFAULTB ≤ 15V l ±20 µA Energy Meter Characteristics TUE_ETB Energy Meter Time-Base Error l ±1 % of Reading TUE_PIN READ_PIN Total Unadjusted Error VIIN_SNSP – VIIN_SNSM = 50mV, Medium Range l ±1 % of Reading TUE_EIN Energy Meter Total Unadjusted Error VIIN_SNSP – VIIN_SNSM = 50mV, Medium Range l ±2 % of Reading EEPROM Characteristics Endurance (Notes 10, 11) 0°C < TJ < 85°C During EEPROM Write Operations l 10,000 Cycles Retention (Notes 10, 11) TJ < 105°C l 20 Years tMASS_WRITE Mass Write Operation Time (Note 12) STORE_USER_ALL, 0°C < TJ < 85°C During EEPROM Write Operations l 200 4100 ms Digital Inputs SCL, SDA, CONTROL0, CONTROL1, PG0, PG1, WDI/RESETB, FAULTB0, FAULTB1, WP VIH Input High Threshold Voltage 1.62V ≤ VVDDIO ≤ 3.6V l 0.7 • VVDDIO V VIL Input Low Threshold Voltage 1.62V ≤ VVDDIO ≤ 3.6V l 0.3 • VVDDIO V VHYST Input Hysteresis FAULTBn, CONTROLn, PGn, WDI/RESETB, WP 20 mV SDA, SCL 80 mV ILEAK Input Leakage Current 0V ≤ VPIN ≤ 3.6V l ±2 µA 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) ELECTRICAL CHARACTERISTICS |
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