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ADS1299_1211 Datasheet(PDF) 4 Page - Texas Instruments |
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ADS1299_1211 Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 65 page  ADS1299 SBAS499A – JULY 2012 – REVISED AUGUST 2012 www.ti.com ELECTRICAL CHARACTERISTICS (continued) 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 PATIENT BIAS AMPLIFIER Integrated noise BW = 150 Hz 2 μVRMS GBP Gain bandwidth product 50 k Ω || 10 pF load, gain = 1 100 kHz SR 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 CMIR Common-mode input range AVSS + 0.3 AVDD – 0.3 V ISC Short-circuit current 1.1 mA Quiescent power consumption 20 μA LEAD-OFF DETECT 0, fDR / 4 Continuous Hz See Register Map section for settings Frequency One time or periodic 7.8, 31.2 Hz ILEAD_OFF[1:0] = 00 6 nA ILEAD_OFF[1:0] = 01 24 nA Current ILEAD_OFF[1:0] = 10 6 μA ILEAD_OFF[1:0] = 11 24 μA Current accuracy ±20 % Comparator threshold accuracy ±30 mV EXTERNAL REFERENCE VI(ref) Reference input voltage 5-V supply, VREF = (VREFP – VREFN) 4.5 V VREFN Negative input AVSS V VREFP Positive input AVSS + 4.5 V Input impedance 5.6 k Ω INTERNAL REFERENCE VO Output voltage 4.5 V VREF accuracy ±0.2 % Drift TA = –40°C to +85°C 35 ppm Start-up time 150 ms SYSTEM MONITORS Analog supply 2 % Reading error Digital supply 2 % From power-up to DRDY low 150 ms Device wake up STANDBY mode 31.25 µs Voltage TA = +25°C 145 mV Temperature sensor reading Coefficient 490 μV/°C Signal frequency See Register Map section for settings Hz fCLK / 2 21, f CLK / 2 20 Test signal Signal voltage See Register Map section for settings ±1, ±2 mV Accuracy ±2 % 4 Copyright © 2012, Texas Instruments Incorporated |
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