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AD7708 数据表(PDF) 23 Page - Analog Devices |
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AD7708 数据表(HTML) 23 Page - Analog Devices |
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23 / 44 page  REV. 0 AD7708/AD7718 –23– Table XI. Registers—Quick Reference Guide 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 the Communications Register. This controls whether subsequent operations are read or write operations and also selects the register for that subsequent operation. Status Register Read Only 8 Bits 00 Hex Provides status information on conversions, calibra- tions and error conditions. Mode Register Read/Write 8 Bits 00 Hex Controls functions such as mode of operation, chan- nel configuration, oscillator operation in power-down. ADC (ADCCON) Control Register Read/Write 8 Bits 07 Hex This register is used to select the active channel input, configure the operating input range, and select unipolar or bipolar operation. I/O (IOCON) I/O Control Register Read/Write 8 Bits 00 Hex This register is used to control and configure the I/O port. Filter Register Read/Write 8 Bits 45 Hex This register determines the amount of averaging performed by the sinc filter and consequently deter- mines the data update rate of the AD7708/AD7718. The filter register determines the update rate for operation with CHOP enabled and CHOP disabled. AD7718 ADC (DATA) Data Register Read Only 24 Bits 000000 Hex Provides the most up-to-date conversion result for the selected channel on the AD7718. AD7708 (DATA) Data Register Read Only 16 Bits 0000 Hex Provides the most up-to-date conversion result for the selected channel on the AD7708. B S MB S L Y D R0 L A C0 R R E0 0 K C O L B S MB S L 3 H C2 H C1 H C0 H C/ U B 2 N R1 N R0 N R B S MB S L 7 F S6 F S5 F S4 F S3 F S2 F S1 F S0 F S B S MB S L 00 R I D 2 PR I D 1 P0 0 T A D 2 PT A D 1 P CR7 CR6 CR5 CR4 CR3 CR2 CR1 CR0 WEN R/ W 0(0) 0(0) A3(0) A2(0) A1(0) A0(0) MSB LSB CHOP NEGBUF REFSEL CHCON OSCPD MD2 MD1 MD0 |
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