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ADS1278SKGDA Datasheet(PDF) 8 Page - Texas Instruments |
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ADS1278SKGDA Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 45 page  ADS1278-HT SBAS447C – MARCH 2009 – REVISED AUGUST 2012 www.ti.com ABSOLUTE MAXIMUM RATINGS Over operating free-air temperature range, unless otherwise noted (1) UNIT AVDD to AGND –0.3 to 6.0 V DVDD, IOVDD to DGND –0.3 to 3.6 V AGND to DGND –0.3 to 0.3 V Momentary 100 mA Input current Continuous 10 mA Analog input to AGND –0.3 to AVDD + 0.3 V Digital input or output to DGND –0.3 to DVDD + 0.3 V Operating temperature range –55 to 210 °C Storage temperature range –60 to 150 °C (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied. ELECTRICAL CHARACTERISTICS All specifications at TA = –55°C to 210°C, AVDD = 5 V, DVDD = 1.8 V, IOVDD = 3.3 V, fCLK = 27 MHz, VREFP = 2.5 V, VREFN = 0 V, and all channels active, unless otherwise noted. TA = –55°C to 125°C TA = 210°C (1) PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT Analog Inputs Full-scale input voltage (FSR(2)) VIN = (AINP – AINN) ±VREF ±VREF V AGND – AVDD + AGND – AVDD + Absolute input voltage AINP or AINN to AGND V 0.1 0.1 0.1 0.1 Common-mode input voltage (VCM) VCM = (AINP + AINN)/2 2.5 2.5 V High-Speed mode 14 14 k Ω High-Resolution mode 14 14 k Ω Differential input impedance Low-Power mode 28 28 k Ω Low-Speed mode 140 140 k Ω DC Performance Resolution No missing codes 24 Bits fCLK = 32.768MHz (3) 128,000 128,000 SPS High-Speed mode fCLK = 27MHz 105,469 105,469 SPS(4) Data rate (fDATA) High-Resolution mode 52,734 52,734 SPS Low-Power mode 52,734 52,734 SPS Low-Speed mode 10,547 10,547 SPS Differential input, VCM = Integral nonlinearity (INL)(5) ±0.0003 ±0.0012 ±0.0014 % FSR(2) 2.5V Offset error 0.25 2 2 mV Offset drift 0.8 μV/°C Gain error 0.1 0.5 0.5 % FSR Gain drift 1.3 ppm/°C High-Speed mode Shorted input 8.5 21 21 μV, rms High-Resolution mode Shorted input 5.5 13 13 μV, rms Noise Low-Power mode Shorted input 8.5 21 21 μV, rms Low-Speed mode Shorted input 8.0 21 21 μV, rms Common-mode rejection fCM = 60Hz 90 108 90 dB (1) Minimum and maximum parameters are characterized for operation at TA = 210°C but may not be production tested at that temperature. Production test limits with statistical guardbands are used to ensure high temperature performance. (2) FSR = full-scale range = 2VREF. (3) fCLK = 32.768MHz max for High-Speed mode, and 27MHz max for all other modes. When fCLK > 27MHz, operation is limited to Frame- Sync mode and VREF ≤ 2.6V. (4) SPS = samples per second. (5) Best fit method. 8 Submit Documentation Feedback Copyright © 2009–2012, Texas Instruments Incorporated Product Folder Link(s): ADS1278-HT |
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