参数资料
| 型号： | AD7747ARUZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/28页 |
| 文件大小： | 0K |
| 描述： | IC CONV 24BIT CAP-DGTL 16-TSSOP |
| 标准包装： | 96 |
| 类型： | 电容数字转换器 |
| 分辨率（位）： | 24 b |
| 数据接口： | 串行 |
| 电压电源： | 单电源 |
| 电源电压： | 2.7 V ~ 5.25 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
| 产品目录页面： | 781 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7747EBZ-ND - BOARD EVAL FOR AD7747 |
| 其它名称： | Q23139198 |
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AD7747
Rev. 0 | Page 15 of 28
STATUS REGISTER
Address Pointer 0x00, Read Only, Default Value 0x07
This register indicates the status of the converter. The status register can be read via the 2-wire serial interface to query a finished
conversion.
The RDY pin reflects the status of the RDY bit. Therefore, the RDY pin high-to-low transition can be used as an alternative indication of
the finished conversion.
Table 9. Status Register Bit Map
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Mnemonic
–
RDY
RDYVT
RDYCAP
Default
0
1
Table 10.
Bit
Mnemonic
Description
7 to 3
–
Not used, always read 0.
2
RDY
RDY = 0 indicates that conversion on the enabled channel(s) is complete and new unread data is available.
If both capacitive and voltage/temperature channels are enabled, the RDY bit is changed to 0 after conversion
on both channels is complete. The RDY bit returns to 1 either when data is read or prior to finishing the next
conversion. If, for example, only the capacitive channel is enabled, then the RDY bit reflects the RDYCAP bit.
1
RDYVT
RDYVT = 0 indicates that a conversion on the voltage/temperature channel is complete and new unread data
is available.
0
RDYCAP
RDYCAP = 0 indicates that a conversion on the capacitive channel is complete and new unread data is available.
CAP DATA REGISTER
24 Bits, Address Pointer 0x01, 0x02, 0x03, Read-Only,
Default Value 0x000000
This register contains the capacitive channel output data. The
register is updated after finished conversion on the capacitive
channel, with one exception: When the serial interface read
operation from the Cap Data register is in progress, the data
register is not updated and the new capacitance conversion
result is lost.
The stop condition on the serial interface is considered to be the
end of the read operation. Therefore, to prevent data corruption,
all three bytes of the data register should be read sequentially
using the register address pointer auto-increment feature of the
serial interface.
To prevent losing some of the results, the Cap Data register
should be read before the next conversion on the capacitive
channel is finished.
The 0x000000 code represents negative full scale (8.192 pF),
the 0x800000 code represents zero scale (0 pF), and the
0xFFFFFF code represents positive full scale (+8.192 pF).
VT DATA REGISTER
24 Bits, Address Pointer 0x04, 0x05, 0x06, Read-Only,
Default Value 0x000000
This register contains the voltage/temperature channel output
data. The register is updated after finished conversion on the
voltage channel or temperature channel, with one exception:
When the serial interface read operation from the VT Data
register is in progress, the data register is not updated and the
new voltage/temperature conversion result is lost.
The stop condition on the serial interface is considered to be the
end of the read operation. Therefore, to prevent data corruption,
all three bytes of the data register should be read sequentially
using the register address pointer auto-increment feature of the
serial interface.
For voltage input, Code 0 represents negative full scale (VREF),
the 0x800000 code represents zero scale (0 V), and the
0xFFFFFF code represents positive full scale (+VREF).
To prevent losing some of the results, the VT Data register
should be read before the next conversion on the voltage/
temperature channel is complete.
For the temperature sensor, the temperature can be calculated
from code using the following equation:
Temperature (°C) = (Code/2048) 4096
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7747ARUZ-REEL | 功能描述:IC CONV CAP TO DIG 24BIT 16TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| AD7747ARUZ-REEL7 | 功能描述:IC CONV CAP TO DIG 24BIT 16TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| AD7748BSTZ | 制造商:Analog Devices 功能描述: |
| AD774B | 制造商:AD 制造商全称:Analog Devices 功能描述:Complete 12-Bit A/D Converters |
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