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參數(shù)資料
| 型號： | AD7738 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 8-Channel, High Throughput, |
| 中文描述： | 8通道，高通量， |
| 文件頁數(shù)： | 16/28頁 |
| 文件大?。?/td> | 407K |
| 代理商： | AD7738 |
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REV. 0
–16–
AD7738
Channel Status Registers
8 Bits, Read-Only Register, Address 20h–27h, Default Value 20h Channel Number
These registers contain individual channel status information and some general AD7738 status information. Reading the Status
registers can be associated with reading the Data registers in the Dump mode. Reading the Status registers is always associated with
reading the Data registers in the Continuous Read mode. See the Digital Interface Description section for more details.
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Mnemonic
CH2
CH1
CH0
0/P0
RDY/P1
NOREF
SIGN
OVR
Default
Channel Number
0
0
0
0
0
Bit
Mnemonic
Description
7–5
CH2–CH0
These bits reflect the channel number. This can be used for current channel identification and easier
operation in the Dump mode and Continuous Read mode.
When the Status Option bit in the corresponding Channel Setup register is reset to 0, this bit is read
as a zero. When the Status Option bit in set to 1, this bit reflects the state of the P0 output pin.
When the Status Option bit in the corresponding Channel Setup register is reset to 0, this bit reflects the
selected channel RDY bit in the ADC Status register. When the Status Option bit is set to 1, this
bit reflects the state of the P1 pin whether it is configured as an input or output.
This bit indicates the reference input status. If the voltage between the REFIN+ and REFIN– pins is less
than the NOREF trigger voltage, then the NOREF bit goes to a 1.
The voltage polarity at the analog input. Will be 0 for a positive voltage; will be 1 for a negative voltage.
This bit reflects either overrange or underrange on an analog input. The bit is set to 1 when the analog
input voltage goes over or under the Nominal Voltage Range. See the Analog Inputs Extended Voltage
Range section.
4
0/P0
3
RDY/P1
2
NOREF
1
0
SIGN
OVR
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