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ADS1298IPAGR Datasheet(PDF) 5 Page - Texas Instruments |
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ADS1298IPAGR Datasheet(HTML) 5 Page - Texas Instruments |
5 / 88 page ADS1294, ADS1294R ADS1296, ADS1296R ADS1298, ADS1298R www.ti.com SBAS459I – JANUARY 2010 – REVISED JANUARY 2012 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 industrial grades devices. 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 ADS1294R, ADS1296R, ADS1298R PARAMETER TEST CONDITIONS MIN TYP MAX UNIT LEAD-OFF DETECT Frequency See the Register Map section for settings 0, fDR/4 kHz Current See the Register Map section for settings 6, 12, 18, 24 nA Current accuracy ±20 % Comparator threshold accuracy ±30 mV RESPIRATION (ADS1294R/6R/8R Only) Internal source 32, 64 kHz Frequency External source 32 64 kHz Phase shift See the Register Map section for settings 22.5 90 157.5 Degrees Impedance range IRESP = 30μA 10 k Ω 0.05Hz to 2Hz brick wall filter, 32kHz modulation clock, phase = 112.5, Impedance measurement noise 20 m ΩPP using IRESP = 30μA with 2kΩ baseline load, gain = 4 test condition internal reference, signal path = 82k Ω, Modulator current 29 µA baseline = 2.21k Ω 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 AVDD ≥ 2.7V Output voltage Register bit CONFIG3.VREF_4V = 1, 4.0 V AVDD ≥ 4.4V VREF accuracy ±0.2 % TA = +25°C 35 ppm/ °C Internal reference drift Commerical grade, 0 °C to +70°C 35 ppm Industrial grade, –40°C to +85°C 45 ppm Start-up time 150 ms 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 μV/°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 % Copyright © 2010–2012, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R |
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