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LTC2975 Datasheet(PDF) 6 Page - Linear Technology |
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LTC2975 Datasheet(HTML) 6 Page - Linear Technology |
6 / 104 page LTC2975 6 2975f For more information www.linear.com/LTC2975 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, VDD25, REFP and REFM pins floating, unless otherwise indicated. CVDD33 = 100nF, CVDD25 = 100nF, CVIN_SNS_CAP = 10nF and CREF = 100nF. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fIN_ADC Input Sampling Frequency 62.5 kHz Sense Input Current Characteristics (Note 12) IIN_VSENSE Input Current VSENSEPn and VSENSEMn Inputs l ±15 µA Differential Input Current VSENSEPn and VSENSEMn Inputs, VIN_DIFF = 6V l ±30 µA IIN_ISENSE Input Current ISENSEPn and ISENSEMn Inputs l ±3 µA Differential Input Current ISENSEPn and ISENSEMn Inputs, |VIN_DIFF| = 0.17V l ±5 µA DAC Output Characteristics N_VDAC Resolution 10 Bits VFS_VDAC Full-Scale Output Voltage (Programmable) DAC Code = 0x3FF DAC Polarity = 1 Buffer Gain Setting_0 Buffer Gain Setting_1 l l 1.3 2.5 1.38 2.65 1.44 2.77 V V INL_VDAC Integral Nonlinearity (Note 6) l ±2 LSB DNL_VDAC Differential Nonlinearity (Note 6) l ±2.4 LSB VOS_VDAC Offset Voltage (Note 6) l ±15 mV VDAC Load Regulation VDACn = 2.65V, IVDACn Sourcing = 2mA 100 ppm/mA VDACn = 0.1V, IVDACn Sinking = 2mA 100 ppm/mA PSRR DC: 3.13V ≤ VDD33 ≤ 3.47V, VPWR = VDD33 60 dB Leakage Current VDACn Hi-Z, 0V ≤ VDACn ≤ 6V l ±100 nA Short-Circuit Current Low VDACn Shorted to GND l –12 –4 mA Short-Circuit Current High VDACn Shorted to VDD33 l 4 12 mA COUT Output Capacitance VDACn Hi-Z 10 pF tS_VDAC DAC Output Update Rate Fast Servo Mode 250 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 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 tS_VS Update Period 12.21 µs Current Supervisor Characteristics VIN_CS Current Sense Input Range Single-Ended Voltage: ISENSEPn, ISENSEMn l –0.1 6 V Differential Voltage: VIN_CS = (ISENSEPn – ISENSEMn) l –170 170 mV N_CS Current Sense Resolution IOUT_OC_FAULT_LIMIT • IOUT_CAL_GAIN IOUT_UC_FAULT_LIMIT • IOUT_CAL_GAIN 400 µV/LSB TUE_CS Total Unadjusted Error 50mV ≤ |VIN_CS| ≤ 170mV l ±3 % of Reading |VIN_CS| < 50mV l ±1.5 mV VOS_CS Offset Error VIN_CS = 0 l ±600 µV tS_CS Update Period 12.21 µs elecTrical characTerisTics |
Similar Part No. - LTC2975_15 |
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Similar Description - LTC2975_15 |
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