Datasheet LTC2945 (Analog Devices) - 4

LTC2945
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDD is from 4V to 80V unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS SENSE INPUTS
VCM SENSE+, SENSE– Common Mode Voltage l 0 80 V ISENSE+(HI) 48V SENSE+ Input Current SENSE+, SENSE–, VDD = 48V l 100 150 µA Shutdown l 2 µA ISENSE–(HI) 48V SENSE– Input Current SENSE+, SENSE–, VDD = 48V l 20 µA Shutdown l 1 µA ISENSE+(LO) 0V SENSE+ Source Current SENSE+, SENSE– = 0V VDD = 48V l –10 µA Shutdown l –2 µA ISENSE–(LO) 0V SENSE– Source Current SENSE+, SENSE– = 0V, VDD = 48V l –5 µA Shutdown l ±1 µA
ADC
RES Resolution (No missing codes) (Note 5) l 12 Bits VFS Full-Scale Voltage ΔSENSE (Note 7) l 101.7 102.4 103.1 mV VIN l 101.7 102.4 103.1 V ADIN l 2.033 2.048 2.063 V LSB LSB Step Size ΔSENSE 25 µV VIN 25 mV ADIN 0.5 mV TUE Total Unadjusted Error (Note 6) ΔSENSE l ±0.75 % VIN l ±0.75 % ADIN l ±0.75 % VOS Offset Error ΔSENSE l ±3.1 LSB VIN l ±1.5 LSB ADIN l ±1.1 LSB INL Integral Nonlinearity ΔSENSE l ±3 LSB VIN l ±2 LSB ADIN l ±2 LSB sT Transition Noise (Note 5) ΔSENSE 1.2 µVRMS VIN 0.3 mVRMS ADIN 10 µVRMS fCONV Conversion Rate (Continuous Mode) l 6 7.5 9 Hz tCONV Conversion Time (Snapshot Mode) ΔSENSE l 60 66 72 ms VIN, ADIN l 30 33 36 ms RADIN ADIN Pin Input Resistance VDD = 48V, ADIN = 3V l 3 10 MΩ IADIN ADIN Pin Input Current VDD = 48V, ADIN = 3V l ±1 µA
I2C INTERFACE (VDD = 48V)
VADR(H) ADR0, ADR1 Input High Threshold l 2.1 2.4 2.7 V VADR(L) ADR0, ADR1 Input Low Threshold l 0.3 0.6 0.9 V IADR(IN) ADR0, ADR1 Input Current ADR0, ADR1 = 0V, 3V l ±13 µA IADR(IN,Z) Allowable Leakage When Open l ±7 µA VOD(OL) SDAO, SDAO, ALERT Output Low Voltage ISDAO, ISDAO, IALERT = 8mA l 0.15 0.4 V ISDA,SCL(IN) SDAI, SDAO, SDAO, SCL Input Current SDAI, SDAO, SDAO, SCL = 5V l 0 ±1 µA VSDA,SCL(TH) SDAI, SCL Input Threshold l 1.5 1.9 2.2 V VSDA,SCL(CL) SDAI, SCL Clamp Voltage ISDAI, ISCL = 3mA l 5.9 6.4 6.9 V IALERT(IN) ALERT Input Current ALERT = 5V l 0 ±1 µA 2945fb 4 For more information www.linear.com/LTC2945