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UC3902N Fiches technique(PDF) 4 Page - Texas Instruments |
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UC3902N Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 10 page UC2902 UC3902 SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011 4 www.ti.com ELECTRICAL CHARACTERISTICS (continued) TJ = –40°C to 105°C, (unless otherwise noted) PARAMETER UNIT MAX TYP MIN TEST CONDITIONS SHARE SENSE AMPLIFIER R Input impedance V(SHARE+) = 1 V, V(SHARE−) = GND V(SENSE) = 10 mV 8 15 kΩ RIN Input impedance R(SHARE+) = 200 Ω (SHARE+ to GND) V(SHARE−) = 1 V, V(SENSE) = 10 mV 8 15 kΩ V(SHARE) Threshold voltage V(SENSE) = 0 V 41 70 100 mV CMRR Common mode rejection ratio 0 V ≤ V(SHARE−) ≤ 1 V, V(SENSE) = −2.5 mV 50 60 AVOL DESCRIPTION from SHARE+ to V(SENSE) = −2.5 mV, 5 nF capacitor from COMP to GND, 1 kΩ resistor from ADJR to GND 50 68 dB AVOL DESCRIPTION from SHARE+ to ADJR V(SENSE) = −2.5 mV, 5 nF capacitor from COMP to GND, 150 Ω resistor from ADJR to GND 50 66 dB Slew rate V(SHARE+) = 0 mV to 10 V step through a 200-Ω resistor, R(COMP) = 500 Ω, V(SENSE) = 10 mV, VCC = 10 V 0.2 0.5 0.8 V/μs ERROR AMPLIFIER gM Transconductance, SHARE+ to COMP 200-Ω resistor SHARE+ to GND 3.0 4.5 6.0 mS IOH High-level output current V(COMP) = 1.5 V, SHARE+ ≥ 300 mV V(SENSE) = −10 mV −450 −325 −200 A IOL Low-level output current 200-Ω resistor SHARE+ to GND, V(COMP) = 1.5 V, V(SENSE) = 10 mV 80 150 250 μA VIO Input offset voltage 15 35 65 mV ΔVIO/ ΔV(SENSE) 1-kΩ resistor ADJR to GND −2.5 mV ≤ V(SENSE) ≤ −25 mV −6 0 6 mV/V ADJ AMPLIFIER ADJR low voltage 200-Ω resistor SHARE+ to GND, V(SENSE) = 10 mV −1 0 1 mV ADJR high voltage V(SENSE) = 10 mV, V(SHARE+) = 1 V 1.4 1.8 2.1 V I(ADJR) = −0.5 mA, V(ADJ) = 2.5 V, V(SENSE) = 10 mV, V(SHARE+) = 1 V 0.96 0.99 1.02 Current gain ADJR to ADJ I(ADJR) = −0.5 mA, V(ADJ) = 20 V, V(SENSE) = 10 mV, V(SHARE+) = 1 V 0.96 0.99 1.02 A/A Current gain ADJR to ADJ I(ADJR) = −10 mA, V(ADJ) = 2.5 V, V(SENSE) = 10 mV, V(SHARE+) = 1 V 0.96 0.99 1.02 A/A I(ADJR) = −10 mA, V(ADJ) = 20 V, V(SENSE) = 10 mV, V(SHARE+) = 1 V 0.96 0.99 1.02 |
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