参数资料
型号: AD7738BRU-REEL7
厂商: Analog Devices Inc
文件页数: 8/28页
文件大小: 0K
描述: IC ADC 24BIT 8CH SIG-DEL 28TSSOP
标准包装: 1,000
位数: 24
采样率(每秒): 15.4k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 100mW
电压电源: 模拟和数字
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 28-TSSOP
包装: 带卷 (TR)
输入数目和类型: 8 个单端,单极;8 个单端,双极;4 个差分,单极;4 个差分,双极
配用: EVAL-AD7738EBZ-ND - BOARD EVAL FOR AD7738
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
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.
40/P0
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.
3
RDY/P1
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.
2
NOREF
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.
1
SIGN
The voltage polarity at the analog input. Will be 0 for a positive voltage; will be 1 for a negative voltage.
0
OVR
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.
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