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ADS1198 bảng dữ liệu(PDF) 5 Page - Texas Instruments |
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ADS1198 bảng dữ liệu(HTML) 5 Page - Texas Instruments |
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5 / 80 page  ADS1294 , ADS1296 ADS1298 www.ti.com SBAS459E – JANUARY 2010 – REVISED AUGUST 2010 ELECTRICAL CHARACTERISTICS (continued) Minimum/maximum specifications apply for all commercial grade (0°C to +70°C) devices and from –40°C to +85°C for ADS1298I industrial grade. Typical specifications are at +25°C. All specifications at DVDD = 1.8V, AVDD – AVSS = 3V (1), VREF = 2.4V, external fCLK = 2.048MHz, data rate = 500SPS, high resolution mode, and gain = 6, unless otherwise noted. ADS1294, ADS1296, ADS1298 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT EXTERNAL REFERENCE 3V supply VREF = (VREFP – VREFN) 2.5 V Reference input voltage 5V supply VREF = (VREFP – VREFN) 4.0 V Negative input (VREFN) AVSS V Positive input (VREFP) AVSS + 2.5 V Input impedance 10 k Ω INTERNAL REFERENCE Register bit CONFIG3.VREF_4V = 0 2.4 V Output voltage Register bit CONFIG3.VREF_4V = 1 4.0 V VREF accuracy ±0.2 % Drift 35 ppm/°C Start-up time 150 ms C-grade, 0°C to +70°C 35 ppm Internal reference drift I-grade, –40°C to +85°C 45 ppm SYSTEM MONITORS Analog supply reading error 2 % Digital supply reading error 2 % From power-up to DRDY low 150 ms Device wake up STANDBY mode 9 ms Temperature sensor reading, voltage TA = +25°C 145 mV Temperature sensor reading, coefficient 490 mV/°C Test Signal Signal frequency See Register Map section for settings Hz fCLK/2 21, f CLK/2 20 Signal voltage See Register Map section for settings ±1, ±2 mV Accuracy ±2 % CLOCK Internal oscillator clock frequency Nominal frequency 2.048 MHz TA = +25°C ±0.5 % 0°C ≤ TA ≤ +70°C ±2 % Internal clock accuracy –40°C ≤ TA ≤ +85°C, ADS1298I industrial ±2.5 % grade version only Internal oscillator start-up time 20 ms Internal oscillator power consumption 120 mW External clock input frequency CLKSEL pin = 0 0.5 2.048 2.25 MHz DIGITAL INPUT/OUTPUT (DVDD = 1.65V to 3.6V) VIH 0.8DVDD DVDD + 0.1 V VIL –0.1 0.2DVDD V Logic level VOH IOH = –500mA DVDD – 0.4 V VOL IOL = +500mA 0.4 V Input current (IIN) 0V < VDigitalInput < DVDD –10 +10 mA POWER-SUPPLY REQUIREMENTS Analog supply (AVDD – AVSS) 2.7 3.0 5.25 V Digital supply (DVDD) 1.65 1.8 3.6 V AVDD – DVDD –2.1 3.6 V Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): ADS1294 ADS1296 ADS1298 |
Số phần tương tự - ADS1198 |
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Mô tả tương tự - ADS1198 |
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