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INA188IDR датащи(PDF) 26 Page - Texas Instruments |
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INA188IDR датащи(HTML) 26 Page - Texas Instruments |
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26 / 41 page ![]() (e + NI 2 ´ e NO 2 G ´ 6 V DIFF BW 26 INA188 SBOS632 – SEPTEMBER 2015 www.ti.com Product Folder Links: INA188 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Device Functional Modes (continued) Table 3. Error Calculation ERROR SOURCE ERROR CALCULATION SPECIFICATION G = 10 ERROR (ppm) G = 1 ERROR (ppm) ABSOLUTE ACCURACY AT 25°C Input offset voltage VOSI / VDIFF 65 μV 65 65 Output offset voltage VOSO / (G × VDIFF) 180 μV 18 180 Input offset current IOS × maximum (RS+, RS–) / VDIFF 5 nA 50 50 Common-mode rejection ratio VCM / (10 CMRR/20 × V DIFF) 104 dB (G = 10), 84 dB (G = 1) 20 501 Total absolute accuracy error (ppm) 153 796 DRIFT TO 105°C Gain drift GTC × (TA – 25) 35 ppm/°C (G = 10), 1 ppm/°C (G = 1) 2800 80 Input offset voltage drift (VOSI_TC / VDIFF) × (TA – 25) 0.15 μV/°C 12 12 Output offset voltage drift [VOSO_TC / ( G × VDIFF)] × (TA – 25) 0.85 μV/°C 6.8 68 Offset current drift IOS_TC × maximum (RS+, RS–) × (TA – 25) / VDIFF 60 pA/°C 48 48 Total drift error (ppm) 2867 208 RESOLUTION Gain nonlinearity 5 ppm of FS 5 5 Voltage noise (1 kHz) eNI = 18, eNO = 110 9 47 Total resolution error (ppm) 14 52 TOTAL ERROR Total error (ppm) Total error = sum of all error sources 3034 1056 |
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