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MAX192BCAP Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX192BCAP Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 24 page Low-Power, 8-Channel, Serial 10-Bit ADC _______________________________________________________________________________________ 9 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (MSB) (LSB) START SEL2 SEL1 SEL0 UNI/BIP SGL/DIF PD1 PD0 Bit Name Description 7(MSB) START The first logic “1” bit after CS goes low defines the beginning of the control byte. 6 SEL2 These three bits select which of the eight channels are used for the conversion. 5 SEL1 See Tables 1 and 2. 4 SEL0 3 UNI/BIP 1 = unipolar, 0 = bipolar. Selects unipolar or bipolar conversion mode. In unipolar mode, an analog input signal from 0V to VREF can be converted; in differential bipolar mode, the differential signal can range from -VREF / 2 to +VREF / 2. Select differential operation if bipolar mode is used. 2 SGL/DIF 1 = single ended, 0 = differential. Selects single-ended or differential conversions. In single-ended mode, input signal voltages are referred to AGND. In differential mode, the voltage difference between two channels is measured. Select unipolar operation if single-ended mode is used. See Tables 1 and 2. 1 PD1 Selects clock and power-down modes. 0(LSB) PD0 PD1 PD0 Mode 0 0 Full power-down (IQ = 2µA) 0 1 Fast power-down (IQ = 30µA) 1 0 Internal clock mode 1 1 External clock mode Table 3. Control-Byte Format Table 2. Channel Selection in Differential Mode (SGL/DIF = 0) SEL2 SEL1 SEL0 CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 0 0 0 + – 0 0 1 + – 0 1 0 + – 0 1 1 + – 1 0 0 – + 1 0 1 – + 1 1 0 – + 1 1 1 – + |
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