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NRF51822-CFAB-R 数据表(PDF) 61 Page - Nordic Semiconductor |
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NRF51822-CFAB-R 数据表(HTML) 61 Page - Nordic Semiconductor |
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61 / 130 page ![]() Page 61 nRF51822 Product Specification v3.3 8.12 Analog to Digital Converter (ADC) specifications Note: HFCLK XOSC is required to get the stated ADC accuracy. Table 51 Analog to Digital Converter (ADC) specifications Symbol Description Note Min. Typ. Max. Units Test level DNL10b Differential non-linearity (10 bit mode). < 1 LSB 2 INL10b Integral non-linearity (10 bit mode). 2 LSB 2 VOS Offset error. -2 +2 % 2 eG Gain error. 1 1. Source impedance less than 5 k Ω. -2 +2 % 2 VREF_VBG Internal Band Gap reference voltage (VBG). 1.20 V V 2 VREF_VBG_ERR Internal Band Gap reference voltage error. -1.5 +1.5 % 2 TCREF_VBG_DRIFT Internal Band Gap reference voltage drift. -200 +200 ppm/°C 2 VREF_EXT External reference voltage (AREF0/1). 0.83 1.2 1.3 V 1 VREF_VDD_LIM Limited supply voltage range for ADC using VDD with prescaler as the reference. CONFIG.REFSEL = SupplyOneHalfPrescaling CONFIG.REFSEL = SupplyOneThirdPrescaling 1.7 2.5 2.6 3.6 V V 1 1 tADC10b Time required to convert a single sample in 10 bit mode. 68 μs 1 tADC9b Time required to convert a single sample in 9 bit mode. 36 μs 1 tADC8b Time required to convert a single sample in 8 bit mode. 20 μs 1 IADC Current drawn by ADC during conversion. 260 μA 1 ADC_ERR_1V8 Absolute error when used for battery measurement at 1.8 V, 2.2 V, 2.6 V, 3.0 V, and 3.4 V. 2 2. Internal reference, input from VDD/3, 10 bit mode. 3 LSB 2 ADC_ERR_2V2 2 LSB 2 ADC_ERR_2V6 1 LSB 2 ADC_ERR_3V0 1 LSB 2 ADC_ERR_3V4 1 LSB 2 |
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