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LTC1340 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1340 Datasheet(HTML) 3 Page - Linear Technology |
3 / 8 page 3 LTC1340 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS tSTART Charge Pump Start-Up Time CCP = 0.1µF, VCC = 2.7V, IOUT = 0 q 1.2 5 ms VRIPPLE Charge Pump Output Ripple at CP CCP = CVCC = 0.1µF, VCC = 2.7V, IOUT = 0 (Note 2) 200 µVP-P fCP Charge Pump Frequency (Note 3) q 2.5 4 MHz The q denotes specifications which apply over the specified temperature range. Note 1: C grade device specifications are guaranteed over the 0 °C to 70°C temperature range. In addition, C grade device specifications are assured over the – 40 °C to 85°C temperature range by design or correlation, but are not production tested. TA = 25°C, unless otherwise noted. (Note 1) 9.4 9.3 9.2 9.1 9.0 8.9 4.9 4.8 4.7 4.6 4.5 4.4 1340 G04 TEMPERATURE ( °C) –50 0 –25 25 50 75 100 125 COUT = 1nF VIN = VSHDN = VCC IOH = 0, VCC = 5V IOH = 0, VCC = 2.7V IOH = 14µA, VCC = 5V IOH = 14µA, VCC = 2.7V Output High Voltage vs Temperature 0.5 0.4 0.3 0.2 0.1 0 1340 G05 TEMPERATURE ( °C) –50 0 –25 25 50 75 100 125 VCC = 2.7V OR 5V COUT = 1nF VIN = 0V VSHDN = VCC IOL = 14µA IOL = 0 SUPPLY VOLTAGE (V) 2.5 3.5 3.0 4.5 4.0 5.5 6.0 5.0 6.5 1340 G06 2100 2050 2000 1950 1900 1850 1800 TA = 25°C VOUT = 1/2AVCC VSHDN = VCC DC Transfer Curve INPUT VOLTAGE (V) 0 12 11 10 9 8 7 6 5 4 3 2 1 0 1 23 4 1340 G01 56 VCC = 2.7V VCC = 5V TA = 25°C COUT = 1nF IOUT = 0 VSHDN = VCC VCC = 6V TEMPERATURE ( °C) –50 0 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 1340 G03 –25 25 50 75 100 125 VCC = 2.7V TO 6V COUT = 1nF VSHDN = VCC FREQUENCY (kHz) 1 20 10 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 180 144 108 72 36 0 –36 –72 –108 –144 –180 –216 10 100 1000 1340 G02 VCC = 2.7V TA = 25°C COUT = 1nF PHASE GAIN Gain and Phase Shift vs Frequency TYPICAL PERFORMANCE CHARACTERISTICS Input Offset Voltage vs Temperature Output Low Voltage vs Temperature Transconductance vs Supply Voltage Note 2: The charge pump output ripple is not tested but is correlated with a PCB ground plane and high quality, low ESR, low ESL metalized polyester 0.1 µF capacitors. Note 3: The internal oscillator typically runs at 2MHz, but the charge pump refreshes the output on both phases of the clock, resulting in an effective 4MHz operating frequency. |
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