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MAX1204ACPP Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX1204ACPP Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 24 page 5V, 8-Channel, Serial, 10-Bit ADC with 3V Digital Interface ______________________________________________________________________________________ 11 Table 2. Control-Byte Format Table 3. Channel Selection in Single-Ended Mode (SGL/DIF = 1) SEL1 SEL0 0 0 0 CH4 CH5 SEL2 CH6 CH7 GND – 1 0 0 – + 0 0 1 – + 1 0 CH0 + 1 – + 0 1 CH1 0 + – 1 1 CH3 0 + – 0 1 CH2 1 + – 1 1 1 + – Table 4. Channel Selection in Differential Mode (SGL/DIF = 0) SEL1 SEL0 0 0 0 CH4 CH5 SEL2 CH6 CH7 0 0 1 – + 0 1 0 + – 0 1 CH0 + 1 + – 1 0 CH1 – 0 – + 1 0 CH3 1 + – 1 1 CH2 0 – + 1 1 1 – + PD0 Bit 0 (LSB) SGL/ DIF Bit 2 PD1 Bit 1 UNI/ BIP Bit 3 SEL 0 Bit 4 Bit 7 (MSB) SEL 1 SEL 2 START Bit 5 Bit 6 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 bipolar mode, the signal can range from -VREF / 2 to +VREF / 2. 1 = single ended, 0 = differential. Selects single-ended or differential conversions. In single- ended mode, input signal voltages are referred to GND. In differential mode, the voltage dif- ference between two channels is measured. (Tables 3 and 4.) Selects clock and power-down modes. PD1 PD0 Mode 00 Full power-down (IDD = 2µA, internal reference) 01 Fast power-down (IDD = 30µA, internal reference) 10 Internal clock mode 11 External clock mode These three bits select which of the eight channels is used for the conversion (Tables 3 and 4). The first logic 1 bit after CS goes low defines the beginning of the control byte. Description Name Bit UNI/ BIP 3 SGL/ DIF 2 PD1 PD0 1 0 (LSB) SEL2 SEL1 SEL0 6 5 4 START 7 (MSB) |
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