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ADS1282-SP Datasheet(PDF) 7 Page - Texas Instruments |
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ADS1282-SP Datasheet(HTML) 7 Page - Texas Instruments |
7 / 61 page 7 ADS1282-SP www.ti.com SBAS691 – MARCH 2016 Product Folder Links: ADS1282-SP Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Electrical Characteristics (continued) 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 (5) Best-fit method. (6) FSR: Full-scale range = ±VREF / (2 × PGA). (7) The maximum limit applies to SMD 5962L14231 post 50 kRads (Si) test at 25°C. (8) Calibration accuracy is on the level of noise reduced by 4 (calibration averages 16 readings). (9) The PGA output impedance and the modulator input impedance results in –1% systematic gain error (10) Gain match relative to PGA = 1. (11) ƒCM is the input common-mode frequency. ƒPS is the power-supply frequency. (12) Input frequencies in the range of NƒCLK / 512 ± ƒDATA / 2 (N = 1, 2, 3...) can mix with the modulator chopping clock. In these frequency ranges intermodulation = 120 dB, typ. (13) At DC. See Figure 42. Integral nonlinearity (INL)(5) Differential input 0.00005 0.0090 % FSR(6) Post 50 kRads (Si), TJ = 25°C (7) 0.0170 % FSR(6) Offset error Shorted input 50 200 μV Post 50 kRads (Si), TJ = 25°C (7) 750 μV Offset error after calibration(8) 1 μV Offset drift 0.02 μV/°C Gain error(9) –1.5% –1.0% –0.5% Gain error after calibration(8) 0.0002% Gain drift PGA = 1 2 ppm/°C PGA = 16 9 ppm/°C Gain matching(10) 0.3% 0.8% Common-mode rejection ƒCM = 60 Hz (11) 82 110 dB Power-supply rejection AVDD, AVSS ƒPS = 60 Hz (11) 80 90 dB Post 50 kRads (Si), TJ = 25°C (7) 64 90 dB DVDD 90 115 dB VOLTAGE REFERENCE INPUTS Reference input voltage (VREF = VREFP – VREFN) 0.5 5 (AVDD – AVSS) + 0.2 V Negative reference input VREFN AVSS – 0.1 VREFP – 0.5 V Positive reference input VREFP VREFN + 0.5 AVDD + 0.1 V Reference input impedance 85 k Ω DIGITAL FILTER RESPONSE Passband ripple ±0.003 dB Passband (–0.01 dB) 0.375 × ƒDATA Hz Bandwidth (–3 dB) 0.413 × ƒDATA Hz High-pass filter corner 0.1 10 Hz Stop band attenuation(12) 135 dB Stop band 0.500 × ƒDATA Hz Group delay Minimum phase filter(13) 5 / ƒDATA s Linear phase filter 31 / ƒDATA s Settling time (latency) Minimum phase filter 62 / ƒDATA s Linear phase filter 62 / ƒDATA s |
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