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ADS1294_1110 Datasheet(PDF) 4 Page - Texas Instruments |
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ADS1294_1110 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 88 page ADS1294, ADS1294R ADS1296, ADS1296R ADS1298, ADS1298R SBAS459H – JANUARY 2010 – REVISED OCTOBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS Minimum/maximum specifications apply for all commercial grade (0 °C to +70°C) devices and from –40°C to +85°C for industrial grades devices. 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 ADS1294R, ADS1296R, ADS1298R PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUTS Full-scale differential input voltage (AINP – AINN) ±VREF/GAIN V See the Input Common-Mode Range Input common-mode range subsection of the PGA Settings and Input Range section Input capacitance 20 pF TA = +25°C, input = 1.5V ±200 pA Input bias current TA = 0°C to +70°C, input = 1.5V ±1 nA TA = –40°C to +85°C, input = 1.5V ±1.2 nA No lead-off 1000 M Ω DC input impedance Current source lead-off detection 500 M Ω Pull-up resistor lead-off detection 10 M Ω PGA PERFORMANCE Gain settings 1, 2, 3, 4, 6, 8, 12 Bandwidth See Table 6 ADC PERFORMANCE Data rates up to 8kSPS, no missing codes 24 Bits Resolution 16kSPS data rate 19 Bits 32kSPS data rate 17 Bits fCLK = 2.048MHz, High-Resolution mode 500 32000 SPS Data rate fCLK = 2.048MHz, Low-Power mode 250 16000 SPS CHANNEL PERFORMANCE DC Performance Gain = 6(2), 10 seconds of data 5 μVPP Gain = 6, 256 points, 0.5 seconds of data 4 7 μVPP Input-referred noise Gain settings other than 6, data rates other See Noise Measurements section than 500SPS Full-scale with gain = 6, best fit 8 ppm Full-scale with gain = 6, best fit, 40 ppm Integral nonlinearity ADS1294R/6R/8R channel 1 –20dBFS with gain = 6, best fit, 8 ppm ADS1294R/6R/8R channel 1 Offset error ±500 µV Offset error drift 2 µV/°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 (1) Performance is applicable for 5V operation as well. Production testing for limits is performed at 3V. (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. 4 Submit Documentation Feedback Copyright © 2010–2011, Texas Instruments Incorporated Product Folder Link(s): ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R |
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