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AS8501TUB Datasheet(PDF) 7 Page - ams AG |
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AS8501TUB Datasheet(HTML) 7 Page - ams AG |
7 / 40 page AS8501 - Preliminary Data Sheet austriamicrosystems Revision 1.1, 04-April-06 www.austriamicrosystems.com Page 7 of 40 Electrical characteristics (continued) VDDA=5V +/-0.1 V, fclk=8.192 MHz, chopping ratio MM=4 (see 7.5.3), oversampling frequency=2.048 MHz, oversampling ratio=128 temperature range : -40 to 125°C if not otherwise noted symbol parameter conditions min typ max units data conversion RES resolution all channels 16 bits 1) 2) Vref reference voltage room temperature 1.13 1.21 1.30 V 3) Vref_TC temperature coefficient of Vref -50 50 ppm/K 4) Vref_Ri internal resistance of Vref Rload > 50 kOhm 200 Ohm fovs clock frequency 4.096 MHz R1 oversamplig ratio 64 128 MM conversions during chopper cycle 4 8 BW bandwidth 7.8 1000 16000 Hz av internal averaging 1 4 1024 cycles fclk external clock frequency 0.05 8.192 10 MHz 5) CLK_extdiv clock division factor 2 4 DR_clk duty ratio of external clock 50 % int_fclk internal clock frequency 180 250 330 kHz analog inputs RSHH, VBAT, ETS, ETS Rin input resistance Ue < 150 mV 50 100 MOhm Cin input capacitance at gain 24 8 15 30 pF internal temperature sensor T_out20 output at 23°C G 6, typical 22500 23 000 23500 digits 6) T_sl slope -20 to 100°C 73 75 77 digits/degC 7) Terr85 error of temperature measurement 0 to 85°C 0.5 2 degC 7) Terr125 -40 to 125°C 1 3 degC 7) current source output to RSHH, RSHL Icurr_rshh 1.5 2 3 µA Notes: 1) with external averaging the resolution can be increased up to 21 bits with an effective sampling rate below 10 Hz 2 ) the system works in overflow condition without degradation of accuracy up to 1.4 * range width. This means that the overflow bit can work as bit no.17 in this range. 3) the absolute value will be trimmed digitally to (1.28*/-0.01) V at 23°C, if not otherwise specified 4) the TC-value will be trimmed digitally to end up with a typical TC-value of the output ( total measurement path) at G24 better than 20 ppm/K the TC- value of the reference voltage after trimming may be typically as high as 50 ppm/K due to manufacturing spread. Min,max limits are not tested but derived from device characterization 5) in the temperature range 0 - 85°C the clock frequency can be increased to 12 MHz 6) value trimmed to +/- 30 digits during final test and stored into ZZR 7) The slope of the sensor is measured on sample basis per lot and not tested per device. The specified limits are derived from device characterization. |
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