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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9966 датащи(PDF) 37 Page - STMicroelectronics |
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L9966 датащи(HTML) 37 Page - STMicroelectronics |
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37 / 122 page  Symbol Parameter Condition Min Typ Max Unit RMEASacc_H Total resistance measurement accuracy 0.1<RPD/RRx<8 30K to 400K, RRx = 50 kΩ Excl.external pull-up RRx precision No ratiometric comparator running CALIB_FLT=0 and CALIB_SEL=1 - - 1.5 % RMEASacc_L Total resistance measurement accuracy 0.1<RPD/RRx<8 50 to 2K, RRx = 470 Ω Excl. external pull-up RRx precision No ratiometric comparator running CALIB_SEL=0 - - 10 % RMEASacc_M Total resistance measurement accuracy 0.1<RPD/RRx<8 2K to 30K, RRx = 9 kΩ Excl. external pull-up RRx precision No ratiometric comparator running CALIB_SEL=0 - - 10 % RMEASacc_H Total resistance measurement accuracy 0.1<RPD/RRx<8 30K to 400K, RRx = 50 kΩ Excl.external pull-up RRx precision No ratiometric comparator running CALIB_SEL=0 - - 10 % RMEASacc_LL Total resistance measurement accuracy 0.01<RPD/RRx<0.1 No ratiometric comparator running CALIB_FLT=0 and CALIB_SEL=1 - - 19 % RMEASacc_HH Total resistance measurement accuracy 8<RPD/RRx<16 No ratiometric comparator running (regardless CALIB_SEL) - - 10 % Rsw_mux_force_1_4 Internal switch impedance IO[4:1] pins - 72 125 Ω Rsw_mux_force_5_12 Internal switch impedance IO[12:5] pins - 75 125 Ω RMEASsettl time Resistance measurement settling time Design info With 6.8 nF and RRx = 470 Ω - - 50 µs RMEASsettl time Resistance measurement settling time Design info With 6.8 nF and RRx = 9 kΩ - - 400 µs RMEASsettl time Resistance measurement settling time Design info With 6.8nF and RRx = 50 kΩ - - 1.8 ms ADC2conv ADC conversion time - -9% 80 +9% µs ADC2res ADC resolution - 15 bit ADC2range ADC input range RPD/RRx(1) 0.01 16 Ω/Ω 1. 0.01<RPD/RRx<0.1 the measurement can be performed but the accuracy is degraded. In order to reach the best accuracy, calibration has to be activated setting CALIB_SEL. Calibration feature is guaranteed in case calibration fault CALIB_FLT flag in GEN_STATUS register is not set. L9966 ADC2: resistance measurement DS12459 - Rev 10 page 37/122 |
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