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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AD7730LBR Fiches technique(PDF) 12 Page - Analog Devices |
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AD7730LBR Fiches technique(HTML) 12 Page - Analog Devices |
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12 / 53 page  AD7730/AD7730L –12– Table V. Summary of On-Chip Registers Power-On/Reset Register Name Type Size Default Value Function Communications Write Only 8 Bits Not Applicable All operations to other registers are initiated through Register the Communications Register. This controls whether subsequent operations are read or write operations and also selects the register for that subsequent operation. Most subsequent operations return con- trol to the Communications Register except for the continuous read mode of operation. Status Register Read Only 8 Bits CX Hex Provides status information on conversions, calibra- tions, settling to step inputs, standby operation and the validity of the reference voltage. Data Register Read Only 16 Bits or 24 Bits 000000 Hex Provides the most up-to-date conversion result from the part. Register length can be programmed to be 16 bits or 24 bits. Mode Register Read/Write 16 Bits 01B0 Hex Controls functions such as mode of operation, uni- polar/bipolar operation, controlling the function of AIN2(+)/D1 and AIN2(-)/D0, burnout current, Data Register word length and disabling of MCLK OUT. It also contains the reference selection bit, the range selection bits and the channel selection bits. Filter Register Read/Write 24 Bits 200010 Hex Controls the amount of averaging in the first stage filter, selects the fast step and skip modes and con- trols the ac excitation and chopping modes on the part. DAC Register Read/Write 8 Bits 20 Hex Provides control of the amount of correction per- formed by the Offset/TARE DAC. Offset Register Read/Write 24 Bits 800000 Hex Contains a 24-bit word which is the offset calibration coefficient for the part. The contents of this register are used to provide offset correction on the output from the digital filter. There are three Offset Regis- ters on the part and these are associated with the input channels as outlined in Table XIII. Gain Register Read/Write 24 Bits 59AEE7 Hex Contains a 24-bit word which is the gain calibration coefficient for the part. The contents of this register are used to provide gain correction on the output from the digital filter. There are three Gain Registers on the part and these are associated with the input channels as outlined in Table XIII. Test Register Read/Write 24 Bits 000000 Hex Controls the test modes of the part which are used when testing the part. The user is advised not to change the contents of this register. WEN ZERO RW1 RW0 ZERO RS2 RS1 RS0 RDY STDY STBY NOREF MS3 MS2 MS1 MS0 MD2 MD1 MD0 B/U DEN D1 D0 WL HIREF ZERO RN1 RN0 CLKDIS BO CH1 CH0 SF11 SF10 SF9 SF8 SF7 SF6 SF5 SF4 SF3 SF2 SF1 SF0 ZERO ZERO SKIP FAST ZERO ZERO AC CHP DL3 DL2 DL1 DL0 ZERO ZERO DAC5 DAC4 DAC3 DAC2 DAC1 DAC0 REV. B |
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