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ADS131A04 Datasheet(PDF) 7 Page - Texas Instruments |
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ADS131A04 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 85 page  7 ADS131A02, ADS131A04 www.ti.com SBAS590A – MARCH 2016 – REVISED MARCH 2016 Product Folder Links: ADS131A02 ADS131A04 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. 7.4 Thermal Information THERMAL METRIC(1) ADS131A0x UNIT PBS (TQFP) 32 PINS RθJA Junction-to-ambient thermal resistance 77.5 °C/W RθJC(top) Junction-to-case (top) thermal resistance 19.0 °C/W RθJB Junction-to-board thermal resistance 30.2 °C/W ψJT Junction-to-top characterization parameter 0.5 °C/W ψJB Junction-to-board characterization parameter 30.0 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance N/A °C/W 7.5 Electrical Characteristics Minimum and maximum specifications apply from TA = –40°C to +125°C. Typical specifications are at TA = 25°C. All specifications are at VIOVDD = 3.3 V, VAVDD = 2.5 V, VAVSS = –2.5 V, VNCPEN (register 0Bh, bit 7) = 0, internal VREF = 2.442 V, fCLKIN = 16.384 MHz, fMOD = 4.096 MHz, data rate = 8 kSPS, and gain = 1 (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUTS Cs Input capacitance 3.5 pF Zin Differential input impedance fMOD = 4.096 MHz 130 k Ω ADC PERFORMANCE Resolution 24 Bits Gain 1, 2, 4, 8, 16 Data rate fMOD = 4.096 MHz 1 128 kSPS DC PERFORMANCE Dynamic range 105 111 dB VAVDD – VAVSS = 5 V, VREF = 4 V, VNCPEN bit = 0 115 All other settings See Noise Measurements section INL Integral nonlinearity Best fit 8 20 ppm Offset error 500 μV Offset drift 1.2 3 μV/°C Gain error Excluding voltage reference and reference buffer error ±0.03 % of FS Gain drift Excluding voltage reference and reference buffer error 0.25 2 ppm/°C AC PERFORMANCE CMRR Common-mode rejection ratio fCM = 50 Hz or 60 Hz 100 dB PSRR Power-supply rejection ratio AVDD supply, fPS = 50 Hz and 60 Hz 85 dB IOVDD supply, fPS = 50 Hz and 60 Hz 105 Crosstalk fIN = 50 Hz and 60 Hz –125 dB SNR Signal-to-noise ratio fIN = 50 Hz or 60 Hz, VREF = 2.442 V, VIN = –20 dBFS, normalized 111 dB fIN = 50 Hz or 60 Hz, VREF = 4.0 V, VIN = –20 dBFS, normalized 115 THD Total harmonic distortion fIN = 50 Hz or 60 Hz (up to 50 harmonics), VIN = –0.5 dBFS –103.5 dB SINAD Signal-to-noise + distortion fIN = 50 Hz or 60 Hz (up to 50 harmonics), VIN = –0.5 dBFS 101 dB SFDR Spurious-free dynamic range fIN = 50 Hz or 60 Hz (up to 50 harmonics), VIN = –0.5 dBFS 105 dB EXTERNAL REFERENCE Reference buffer offset TA = 25°C 170 µV Reference buffer offset drift –40°C ≤ TA ≤ +125°C 1.1 4.3 µV/°C REFEXT input impedance 50 M Ω |
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