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ADS1296 Datasheet(PDF) 4 Page - Texas Instruments |
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ADS1296 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 80 page ADS1294 , ADS1296 ADS1298 SBAS459E – JANUARY 2010 – REVISED AUGUST 2010 www.ti.com 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 CHANNEL PERFORMANCE DC Performance Gain = 6(2), 10 seconds of data 5 mVPP Gain = 6, 256 points, 0.5 seconds of data 4 7 mVPP Input-referred noise Gain settings other than 6, See Noise Measurements section data rates other than 500SPS Integral nonlinearity Full-scale with gain = 6, best fit 8 ppm Offset error ±500 mV Offset error drift 2 mV/°C Gain error Excluding voltage reference error ±0.2 ±0.5 % of FS Gain drift Excluding voltage reference drift 5 ppm/°C Gain match between channels 0.3 % of FS AC Performance Common-mode rejection fCM = 50Hz, 60Hz (3) –105 –115 dB Power-supply rejection fPS = 50Hz, 60Hz 90 dB Crosstalk fIN = 50Hz, 60Hz –126 dB Signal-to-noise ratio (SNR) fIN = 10Hz input, gain = 6 112 dB 10Hz, –0.5dBFs –98 dB Total harmonic distortion (THD) 100Hz, –0.5dBFs(4) –100 dB RIGHT LEG DRIVE (RLD) AMPLIFIER AND PACE AMPLIFIERS RLD integrated noise Bandwidth = 150Hz 7 mVRMS PACE integrated noise Bandwidth = 8kHz 20 mVRMS PACE amplifier crosstalk Crosstalk between PACE amplifiers 60 dB Gain bandwidth product 50k Ω || 10pF load, gain = 1 100 kHz Slew rate 50k Ω || 10pF load, gain = 1 0.25 V/ms Total harmonic distortion fIN = 100Hz, gain = 1 –70 dB Common-mode input range AVSS + 0.7 AVDD – 0.3 V Common-mode resistor matching Internal 200k Ω resistor matching 0.1 % Short-circuit current ±0.25 mA Quiescent power consumption Either RLD or pace amplifier 20 mA WILSON CENTRAL TERMINAL (WCT) AMPLIFIER Integrated noise Bandwidth = 150Hz See Table 5 nV/ √Hz Gain bandwidth product See Table 5 nVRMS Slew rate See Table 5 V/s Total harmonic distortion fIN = 100Hz 90 dB Common-mode input range AVSS + 0.3 AVDD – 0.3 V Short-circuit current ±0.25 mA Quiescent power consumption See Table 5 mA 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 (2) Noise data measured in a 10-second interval. Test not performed in production. Input-referred noise is calculated with input shorted (without electrode resistance) over a 10-second interval. (3) CMRR is measured with a common-mode signal of AVSS + 0.3V to AVDD – 0.3V. The values indicated are the minimum of the eight channels. (4) Harmonics above the second harmonic are attenuated by the digital filter. 4 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): ADS1294 ADS1296 ADS1298 |
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