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AD7323BRUZ Datasheet(PDF) 26 Page - Analog Devices |
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AD7323BRUZ Datasheet(HTML) 26 Page - Analog Devices |
26 / 37 page Data Sheet AD7323 Rev. B | Page 25 of 36 SEQUENCE REGISTER The sequence register on the AD7323 is a 4-bit, write-only register. Each of the four analog input channels has one corresponding bit in the sequence register. To select a channel for inclusion in the sequence, set the corresponding channel bit to 1 in the sequence register. RANGE REGISTER The range register is used to select one analog input range per analog input channel. It is an 8-bit, write-only register with two dedicated range bits for each of the analog input channels from Channel 0 to Channel 3. There are four analog input ranges, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. A write to the range register is selected by setting the write bit to 1 and the register select bits to 0 and 1. After the initial write to the range register occurs, each time an analog input is selected, the AD7323 automatically configures the analog input to the appropriate range, as indicated by the range register. The ±10 V input range is selected by default on each analog input channel (see Table 13). MSB LSB 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Write Register Select 1 Register Select 2 VIN0 VIN1 VIN2 VIN3 0 0 0 0 0 0 0 0 0 MSB LSB 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Write Register Select 1 Register Select 2 VIN0A VIN0B VIN1A VIN1B VIN2A VIN2B VIN3A VIN3B 0 0 0 0 0 Table 13. Range Selection VINxA VINxB Description 0 0 This combination selects the ±10 V input range on VINx. 0 1 This combination selects the ±5 V input range on VINx. 1 0 This combination selects the ±2.5 V input range on VINx. 1 1 This combination selects the 0 V to +10 V input range on VINx. |
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