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ADS1299 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS1299 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 66 page  ADS1299 www.ti.com SBAS499A – JULY 2012 – REVISED AUGUST 2012 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. ADS1299 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUTS Full-scale differential input voltage ±VREF / gain V (AINP – AINN) See the Input Common-Mode Range Input common-mode range subsection of the PGA Settings and Input Range section Ci Input capacitance 20 pF TA = +25°C, input = 2.5 V ±300 pA IIB Input bias current TA = –40°C to +85°C, input = 2.5 V ±300 pA No lead-off 1000 M Ω DC input impedance Current source lead-off detection 500 M Ω (ILEADOFF = 6 nA) 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 CHANNEL PERFORMANCE (DC Performance) 10 seconds of data, gain = 24(1) 1.0 μVPP 250 points, 1 second of data, gain = 24, 1.0 1.35 μVPP TA = +25°C Input-referred noise (0.01 Hz to 70 Hz) 250 points, 1 second of data, gain = 24, 1.0 1.6 μVPP TA = –40°C to +85°C All other sample rates and gain settings See Noise Measurements section INL Integral nonlinearity Full-scale with gain = 12, best fit 8 ppm EO Offset error 60 μV Offset error drift 80 nV/°C EG 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 CHANNEL PERFORMANCE (AC 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 (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. Copyright © 2012, Texas Instruments Incorporated 3 |
Similar Part No. - ADS1299_14 |
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Similar Description - ADS1299_14 |
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