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ADS1299-4PAG Datasheet(PDF) 8 Page - Texas Instruments |
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ADS1299-4PAG Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 79 page  8 ADS1299, ADS1299-4, ADS1299-6 SBAS499B – JULY 2012 – REVISED OCTOBER 2016 www.ti.com Product Folder Links: ADS1299 ADS1299-4 ADS1299-6 Submit Documentation Feedback Copyright © 2012–2016, Texas Instruments Incorporated (1) Noise data measured in a 10-second interval. Test not performed in production. Input-referred noise is calculated with the input shorted (without electrode resistance) over a 10-second interval. (2) CMRR is measured with a common-mode signal of AVSS + 0.3 V to AVDD – 0.3 V. The values indicated are the minimum of the eight channels. 7.5 Electrical Characteristics Minimum and maximum specifications apply from –40°C to 85°C. Typical specifications are at +25°C. All specifications are at DVDD = 3.3 V, AVDD – AVSS = 5 V, VREF = 4.5 V, external fCLK = 2.048 MHz, data rate = 250 SPS, and gain = 12, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUTS Input capacitance 20 pF Input bias current TA = +25°C, input = 2.5 V ±300 pA TA = –40°C to +85°C, input = 2.5 V ±300 DC input impedance No lead-off 1000 M Ω Current source lead-off detection (ILEADOFF = 6 nA) 500 PGA PERFORMANCE Gain settings 1, 2, 4, 6, 8, 12, 24 BW Bandwidth See Table 5 ADC PERFORMANCE Resolution 24 Bits DR Data rate fCLK = 2.048 MHz 250 16000 SPS DC CHANNEL PERFORMANCE Input-referred noise (0.01 Hz to 70 Hz) 10 seconds of data, gain = 24(1) 1 μVPP 250 points, 1 second of data, gain = 24, TA = +25°C 1 1.35 250 points, 1 second of data, gain = 24, TA = –40°C to +85°C 1 1.6 All other sample rates and gain settings See Noise Measurements INL Integral nonlinearity Full-scale with gain = 12, best fit 8 ppm Offset error 60 μV Offset error drift 80 nV/°C Gain error Excluding voltage reference error 0.1 ±0.5 % of FS Gain drift Excluding voltage reference drift 3 ppm/°C Gain match between channels 0.2 % of FS AC CHANNEL PERFORMANCE CMRR Common-mode rejection ratio fCM = 50 Hz and 60 Hz (2) –110 –120 dB PSRR Power-supply rejection ratio fPS = 50 Hz and 60 Hz 96 dB Crosstalk fIN = 50 Hz and 60 Hz –110 dB SNR Signal-to-noise ratio VIN = –2 dBFs, fIN = 10-Hz input, gain = 12 121 dB THD Total harmonic distortion VIN = –0.5 dBFs, fIN = 10 Hz –99 dB PATIENT BIAS AMPLIFIER Integrated noise BW = 150 Hz 2 μVRMS Gain bandwidth product 50-k Ω || 10-pF load, gain = 1 100 kHz Slew rate 50-k Ω || 10-pF load, gain = 1 0.07 V/μs THD Total harmonic distortion fIN = 10 Hz, gain = 1 –80 dB Common-mode input range AVSS + 0.3 AVDD – 0.3 V Short-circuit current 1.1 mA Quiescent power consumption 20 μA |
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