参数资料
型号: AD7739BRU
厂商: ANALOG DEVICES INC
元件分类: ADC
英文描述: 8-Channel, High Throughput, 24-Bit Sigma-Delta ADC
中文描述: 8-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO24
封装: MS-153AD, TSSOP-24
文件页数: 19/32页
文件大小: 380K
代理商: AD7739BRU
AD7739
CHANNEL SETUP REGISTERS
8 Bits, Read/Write Registers, Address 0x28–0x2F, Default Value 0x00
Rev. 0 | Page 19 of 32
These registers are used to configure the selected channel, to configure its input voltage range, and to set up the corresponding channel
status register.
Bit
Mnemonic
Default
Bit 7
BUFOFF
0
Bit 6
COM1
0
Bit 5
COM0
0
Bit 4
Stat OPT
0
Bit 3
ENABLE
0
Bit 2
RNG2
0
Bit 1
RNG1
0
Bit 0
RNG0
0
Bit
7
Mnemonic
BUFOFF
Description
Buffer Off. If reset to 0, then the internal buffer is enabled.
Operation only with the internal buffer enabled is recommended.
Analog inputs configuration:
COM1
COM0
Channel
0
0
0
AIN0–AINCOM
1
AIN1–AINCOM
2
AIN2–AINCOM
3
AIN3–AINCOM
4
AIN4–AINCOM
5
AIN5–AINCOM
6
AIN6–AINCOM
7
AIN7–AINCOM
6–5
COM1, COM0
COM1
1
AIN0–AIN1
AIN2–AIN3
AIN4–AIN5
AIN6–AIN7
AIN0–AIN1
AIN2–AIN3
AIN4–AIN5
AIN6–AIN7
COM0
1
4
Stat OPT
Status Option. When this bit is set to 1, the P0 and P1 bits in the channel status register will reflect the state of
the P0 and P1 pins. When this bit is reset to 0, the RDY bit in the channel status register will reflect the channel
corresponding to the RDY bit in the ADC status register.
Channel Enable. Set this bit to 1 to enable the channel in the continuous conversion mode. A single
conversion will take place regardless of this bit’s value.
This is the channel input voltage range:
RNG2
RNG1
RNG0
Nominal Input Voltage Range
1
0
0
±2.5 V
1
0
1
+2.5 V
0
0
0
±1.25 V
0
0
1
+1.25 V
0
1
0
±0.625 V
0
1
1
+0.625 V
3
ENABLE
2–0
RNG2–RNG0
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