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ADS1282IPWG4 Datasheet(PDF) 6 Page - Texas Instruments |
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ADS1282IPWG4 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 61 page 6 ADS1282-SP SBAS691 – MARCH 2016 www.ti.com Product Folder Links: ADS1282-SP 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. 7.3 Thermal Information THERMAL METRIC(1) ADS1282-SP UNIT HKV [CFP (TBAR)] 28 PINS RθJA Junction-to-ambient thermal resistance 64.4 °C/W RθJC(top) Junction-to-case (top) thermal resistance 16 °C/W RθJB Junction-to-board thermal resistance 58.6 °C/W ψJT Junction-to-top characterization parameter 13.3 °C/W ψJB Junction-to-board characterization parameter 50.5 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 5.3 °C/W (1) ƒCLK = system clock. (2) Input impedance is improved by disabling input chopping (CHOP bit = 0). (3) VIN = 20 mVDC / PGA, see Table 1. (4) VIN = 31.25 Hz, –0.5 dBFS. 7.4 Electrical Characteristics AVDD = 2.5 V, AVSS = –2.5 V, ƒCLK (1) = 4.096 MHz, VREFP = 2.5 V, VREFN = –2.5 V, DVDD = 3.3 V, CAPN – CAPP = 10 nF, PGA = 1, and ƒDATA = 1000 SPS, over operating temperature range, unless otherwise noted. Typical values are TJ = 25°C. A total ionizing dose of 50 kRad (Si) exposure at a low dose rate of < 10 mRads (Si)/s, post tested at 25°C. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUTS Full-scale input voltage VIN = (AINP – AINN) (VREFP – VREFN) / (PGA) Vpp-diff Absolute input range AINP or AINN AVSS + 0.7 AVDD – 1.25 V PGA input voltage noise density 5 nV/ √Hz Differential input impedance(2) 1 G Ω Common-mode input impedance 100 M Ω Input bias current 1 nA Crosstalk ƒ = 31.25 Hz –128 dB MUX on-resistance 30 Ω PGA OUTPUT (CAPP, CAPN) Absolute output range AVSS + 0.4 AVDD – 0.4 V PGA differential output impedance 600 Ω Output impedance tolerance ±10% External bypass capacitance 10 100 nF Modulator differential input impedance 55 k Ω AC PERFORMANCE Signal-to-noise ratio(3) SNR 112 124 dB Total harmonic distortion(4) THD PGA = 1...16 –122 –99 dB PGA = 32 –117 –90 dB PGA = 64 –115 dB Spurious-free dynamic range SFDR 123 dB DC PERFORMANCE Resolution No missing codes 31 bits Data rate ƒDATA FIR filter mode 250 4000 SPS SINC filter mode 8000 128000 SPS |
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