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ADS5203IPFBR bảng dữ liệu(PDF) 3 Page - Texas Instruments |
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ADS5203IPFBR bảng dữ liệu(HTML) 3 Page - Texas Instruments |
3 / 15 page ADS5203 SBAS258A – JUNE 2002 – REVISED JULY 2002 www.ti.com 3 ELECTRICAL CHARACTERISTICS over recommended operating conditions with fCLK = 80MHz and use of internal voltage references, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Power Supply AVDD AV DV DRV 3 3V 56 62 IDD Operating Supply Current DVDD AVDD = DVDD = DRVDD = 3.3V, CL =10pFfIN = 3 5MHz –1dBFS 1.7 2.2 mA IDD O erating Su ly Current DRVDD CL = 10pF, fIN = 3.5MHz, –1dBFS 15 26 mA Power Dissipation PD PWDN_REF = ‘L’ 240 290 mW Power Dissipation PD PWDN_REF = ‘H’ 220 240 mW Standby Power PD(STBY) STDBY = ‘H’, CLK Held HIGH or LOW 95 150 µW Power-Up Time for All References from Standby tPD 550 ms Wake Up Time tWU External Reference 40 µs Digital Inputs High-Level Input Current on Digital Inputs incl. CLK IIH AVDD =DVDD =DRVDD =36V –1 1 µA Low-Level Input Current on Digital Inputs incl. CLK IIL AVDD = DVDD = DRVDD = 3.6V –1 1 µA Digital Outputs High-Level Output Voltage VOH AVDD = DVDD = DRVDD = 3.0V at IOH = 50µA, Digital Outputs Forced HIGH 2.8 2.96 V Low-Level Output Voltage VOL AVDD = DVDD = DRVDD = 3.0V at IOL = 50µA, Digital Outputs Forced LOW 0.04 0.2 V Output Capacitance CO 5 pF High-Impedance State Output Current to High-Level IOZH AVDD =DVDD =DRVDD =36V –1 +1 µA High-Impedance State Output Current to Low-Level IOZL AVDD = DVDD = DRVDD = 3.6V –1 +1 µA Data Output Rise and Fall Time CLOAD = 10pF, Single–Bus Mode 3 ns Data Output Rise-and-Fall Time CLOAD = 10pF, Dual–Bus Mode 5 ns Reference Outputs Reference Top Voltage VREFTO Absolute Min/Max Values Valid and 1.9 2 2.1 V Reference Bottom Voltage VREFBO Absolute Min/Max Values Valid and Tested for AVDD = 3.3V 0.95 1 1.05 V Differential Reference Votage REFT – REFB 0.95 1.0 1.05 V DC Accuracy Integral Nonlinearity End Point INL Internal TA = 40°C to +85°C 15 ±04 +1 5 LSB Integral Nonlinearity, End Point INL Internal References(1) TA = –40°C to +85°C –1.5 ±0.4 +1.5 LSB Differential Nonlinearity DNL Internal References(2) TA = –40°C to +85°C –0.9 ±0.5 +1 LSB Missing Codes No Missing Codes Assured Zero Error(3) AV DV DRV 3 3V 0.12 ±1.5 %FS Full–Scale Error AVDD = DVDD = DRVDD = 3.3V External References (3) 0.28 ±1.5 %FS Gain Error External References (3) 0.24 ±1.5 %FS (1) Integral nonlinearity refers to the deviation of each individual code from a line drawn from zero to full-scale. The point used as zero occurs ½LSB before the first code transition. The full-scale point is defined as a level ½LSB beyond the last code transition. The deviation is measured from the center of each particular code to the best-fit line between these two endpoints. (2) An ideal ADC exhibits code transitions that are exactly 1LSB apart. DNL is the deviation from this ideal value. Therefore, this measure indicates how uniform the transfer function step sizes are. The ideal step size is defined here as the step size for the device under test, (i.e., (last transition level – first transition level)/(2n – 2)). Using this definition for DNL separates the effects of gain and offset error. A minimum DNL better than –1LSB ensures no missing codes. (3) Zero error is defined as the difference in analog input voltage—between the ideal voltage and the actual voltage—that will switch the ADC output from code 0 to code 1. The ideal voltage level is determined by adding the voltage corresponding to ½LSB to the bottom reference level. The voltage corresponding to 1LSB is found from the difference of top and bottom references divided by the number of ADC output levels (1024). Full-scale error is defined as the difference in analog input voltage—between the ideal voltage and the actual voltage—that will switch the ADC output from code 1022 to code 1023. The ideal voltage level is determined by subtracting the voltage corresponding to 1.5LSB from the top reference level. The voltage corresponding to 1LSB is found from the difference of top and bottom references divided by the number of ADC output levels (1024). |
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