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ADS1282IPW Datasheet(PDF) 4 Page - Texas Instruments |
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ADS1282IPW Datasheet(HTML) 4 Page - Texas Instruments |
4 / 52 page ADS1282 SBAS418E – SEPTEMBER 2007 – REVISED OCTOBER 2008 ........................................................................................................................................ www.ti.com ELECTRICAL CHARACTERISTICS (continued) Limit specifications at –40°C to +85°C. Typical specifications at +25°C, AVDD = +2.5V, AVSS = –2.5V, fCLK = 4.096MHz, VREFP = +2.5V, VREFN = –2.5V, DVDD = +3.3V, CAPN – CAPP = 10nF, PGA = 1, High-Resolution Mode, and fDATA = 1000SPS, unless otherwise noted. ADS1282 PARAMETER CONDITIONS MIN TYP MAX UNIT DC PERFORMANCE (continued) PGA = 1 2 ppm/°C Gain drift PGA = 16 9 ppm/°C Gain matching(9) 0.3 0.8 % Common-mode rejection fCM = 60Hz (10) 95 110 dB AVDD, AVSS 80 90 Power-supply rejection fPS = 60Hz (10) dB DVDD 90 115 VOLTAGE REFERENCE INPUTS (AVDD – AVSS) Reference input voltage (VREF = VREFP – VREFN) 0.5 5 V + 0.2 Negative reference input VREFN AVSS – 0.1 VREFP – 0.5 V Positive reference input VREFP VREFN + 0.5 AVDD + 0.1 V High-resolution mode 85 k Ω Reference input impedance Low-power mode 170 k Ω DIGITAL FILTER RESPONSE Passband ripple ±0.003 dB Passband (–0.01dB) 0.375 × fDATA Hz Bandwidth (–3dB) 0.413 × fDATA Hz High-pass filter corner 0.1 10 Hz Stop band attenuation(11) 135 dB Stop band 0.500 × fDATA Hz Minimum phase filter 5/fDATA Group delay s Linear phase filter 31/fDATA Minimum phase filter 10/fDATA Settling time (latency) s Linear phase filter 62/fDATA DIGITAL INPUT/OUTPUT VIH 0.8 × DVDD DVDD V VIL DGND 0.2 × DVDD V VOH IOH = 1mA 0.8 × DVDD V VOL IOL = 1mA 0.2 × DVDD V Input leakage 0 < VDIGITAL IN < DVDD ±10 µA Clock input fCLK 1 4.096 MHz Serial clock rate fSCLK fCLK/2 MHz (9) Gain match relative to PGA = 1. (10) fCM is the input common-mode frequency. fPS is the power-supply frequency. (11) Input frequencies in the range of NfCLK/512 ± fDATA/2 (N = 1, 2, 3...) can mix with the modulator chopping clock. In these frequency ranges intermodulation = 120dB, typ. 4 Submit Documentation Feedback Copyright © 2007–2008, Texas Instruments Incorporated Product Folder Link(s): ADS1282 |
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