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LTC2979 Datasheet(PDF) 3 Page - Linear Technology |
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LTC2979 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 20 page  LTC2979 3 2979f For more information www.linear.com/LTC2979 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. VDD33 = 3.3V, VIN_SNS = 12V, VDD25 and REF pins floating, unless otherwise indicated. (Notes 2, 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply Characteristics IVDD33 VDD33 Supply Current 3.13V ≤ VDD33 ≤ 3.47V l 10 13 mA VUVLO_VDD33 VDD33 Undervoltage Lockout VDD33 Ramping Up l 2.35 2.55 2.8 V VDD33 Undervoltage Lockout Hysteresis 120 mV VDD33 Supply Input Operating Range l 3.13 3.47 V VDD25 Regulator Output Voltage 3.13V ≤ VDD33 ≤ 3.47V l 2.35 2.5 2.6 V Regulator Output Short-Circuit Current VDD33 = 3.47V, VDD25 = 0V l 30 55 80 mA tINIT Initialization Time Time from VIN Applied Until the TON_DELAY Timer Starts 30 ms Voltage Reference Characteristics VREF Output Voltage (Note 4) VREF = VREFP – VREFM, 0 < IREFP < 100µA 1.232 V Temperature Coefficient 3 ppm/°C Hysteresis (Note 5) 100 ppm ADC Characteristics VIN_ADC Voltage Sense Input Range Differential Voltage: VIN_ADC = (VSENSEPn – VSENSEMn) l 0 6 V Single-Ended Voltage: VSENSEMn l –0.1 0.1 V Current Sense Input Range (Odd Numbered Channels Only) Single-Ended Voltage: VSENSEPn, VSENSEMn l –0.1 6 V Differential Voltage: VIN_ADC l –170 170 mV N_ADC Voltage Sense Resolution (Uses L16 Format) 0V ≤ VIN_ADC ≤ 6V Mfr_config_adc_hires = 0 122 µV/LSB Current Sense Resolution (Odd Numbered Channels Only) 0mV ≤ |VIN_ADC| < 16mV (Note 6) 16mV ≤ |VIN_ADC| < 32mV 32mV ≤ |VIN_ADC| < 63.9mV 63.9mV ≤ |VIN_ADC| < 127.9mV 127.9mV ≤ |VIN_ADC| Mfr_config_adc_hires = 1 15.625 31.25 62.5 125 250 µV/LSB µV/LSB µV/LSB µV/LSB µV/LSB TUE_ADC_ VOLT_SNS Total Unadjusted Error (Note 4) Voltage Sense Mode VIN_ADC ≥ 1V l ±0.5 % of Reading Voltage Sense Mode 0 ≤ VIN_ADC ≤ 1V l ±5.0 mV TUE_ADC_ CURR_SNS Total Unadjusted Error (Note 4) Current Sense Mode, Odd Numbered Channels Only, 20mV ≤ VIN_ADC ≤ 170mV l ±0.7 % of Reading Current Sense Mode, Odd Numbered Channels Only, VIN_ADC ≤ 20mV l ±140 µV VOS_ADC Offset Error Current Sense Mode, Odd Numbered Channels Only l ±100 µV tCONV_ADC Conversion Time Voltage Sense Mode (Note 7) 6.15 ms Current Sense Mode (Note 7) 24.6 ms Temperature Input (Note 7) 24.6 ms tUPDATE_ADC Update Time Odd Numbered Channels in Current Sense Mode (Note 7) 160 ms CIN_ADC Input Sampling Capacitance 1 pF |
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