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| 型号： | MCP3426A0-E/MS |
| 厂商： | Microchip Technology |
| 文件页数： | 9/56页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT I2C PROGBL 8-MSOP |
| 产品培训模块： | MCP3901 Analog Front End |
| 标准包装： | 100 |
| 位数： | 16 |
| 采样率（每秒）： | 15 |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
| 输入数目和类型： | 2 个差分，单极 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
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2009 Microchip Technology Inc.
DS22226A-page 17
MCP3426/7/8
5.0
USING THE DEVICES
5.1
Operating Modes
The user operates the device by setting up the device
configuration register using a write command (see
Figure 5-3) and reads the conversion data using a read
command (see Figure 5-4 ). The device operates in two
modes:
(a)
Continuous
Conversion
Mode
or
(b) One-Shot Conversion Mode (single conversion).
This mode selection is made by setting the O/C bit in
the Configuration Register. Refer to Section 5.2
“Configuration Register” for more information.
5.1.1
CONTINUOUS CONVERSION
MODE (O/C BIT = 1)
The device performs a Continuous Conversion if the
O/C bit is set to logic “high”. Once the conversion is
completed, RDY bit is toggled to ‘0’ and the result is
placed at the output data register. The device
immediately begins another conversion and overwrites
the output data register with the most recent result.
The device clears the data ready flag (RDY bit = 0)
when the conversion is completed. The device sets the
ready flag bit (RDY bit = 1), if the latest conversion
result has been read by the Master.
When writing configuration register:
- Setting RDY bit in continuous mode does not
affect anything.
When reading conversion data:
- RDY bit = 0 means the latest conversion
result is ready.
- RDY bit = 1 means the conversion result is
not updated since the last reading. A new
conversion is under processing and the RDY
bit will be cleared when the new conversion
result is ready.
5.1.2
ONE-SHOT CONVERSION MODE
(O/C BIT = 0)
Once the One-Shot Conversion (single conversion)
Mode is selected, the device performs only one
conversion, updates the output data register, clears the
data ready flag (RDY = 0), and then enters a low power
standby mode. A new One-Shot Conversion is started
again when the device receives a new write command
with RDY = 1.
When writing configuration register:
- The RDY bit needs to be set to begin a new
conversion in one-shot mode.
When reading conversion data:
- RDY bit = 0 means the latest conversion
result is ready.
- RDY bit = 1 means the conversion result is
not updated since the last reading. A new
conversion is under processing and the RDY
bit will be cleared when the new conversion is
done.
This
One-Shot
Conversion
Mode
is
highly
recommended for low power operating applications
where the conversion result is needed by request on
demand. During the low current standby mode, the
device consumes less than 1 A maximum (or 300 nA
typical). For example, if the user collects 16-bit
conversion
data
once
a
second
in
One-Shot
Conversion mode, the device draws only about one-
fifteenth of the operating currents for the continuous
conversion
mode.
In
this
example,
the
device
consumes
approximately
9 A
(135 A
/
15 SPS = 9 A), when the device performs only one
conversion per second (1 SPS) in 16-bit conversion
mode with 3V power supply.
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相关代理商/技术参数 |
参数描述 |
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| MCP3426A0T-E/MC | 功能描述:模数转换器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3426A0T-E/MS | 功能描述:模数转换器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3426A0T-E/SN | 功能描述:模数转换器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3426A1-E/MC | 功能描述:模数转换器 - ADC 18bit deltasigma ADC single channel, 4sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3426A1-E/MS | 功能描述:模数转换器 - ADC 18bit deltasigma ADC single channel, 4sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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