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参数资料
| 型号： | LMP90078MHX/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封装： | LEAD FREE, PLASTIC, MO-153, TSSOP-28 |
| 文件页数： | 32/62页 |
| 文件大小： | 1721K |
| 代理商： | LMP90078MHX/NOPB |
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16.6 POWER MANAGEMENT
The device can be placed in Active, Power-Down, or Stand-
By state.
In Power-Down, the ADC is not converting data, contents of
the registers are unaffected, and there is a drastic power re-
duction. In Stand-By, the ADC is not converting data, but the
power is only slightly reduced so that the device can quickly
transition into the active state if desired.
These states can be selected using the PWRCN register.
When written, PWRCN brings the device into the Active, Pow-
er-Down, or Stand-By state. When read, PWRCN indicates
the state of the device.
The read value would confirm the write value after a small
latency (approximately 15 s with the internal CLK). It may be
appropriate to wait for this latency to confirm the state change.
Requests not adhering to this latency requirement may be
rejected.
It is not possible to make a direct transition from the power-
down state to the stand-by state. This state diagram is shown
below.
30169788
FIGURE 29. Active, Power-Down, Stand-by State Diagram
16.7 RESET and RESTART
Writing 0xC3 to the REG_AND_CNV_RST field will reset the
conversion and most of the programmable registers to their
default values. The only registers that will not be reset are the
System
Calibration
Registers
(CHx_SCAL_OFFSET,
CHx_SCAL_GAIN) and the DT_AVAIL_B bit.
If it is desirable to reset the System Calibration Coefficient
Registers, then set RESET_SYSCAL = 1 before writing 0xC3
to REG_AND_CNV_RST. If the device is operating in the
“System Calibration Offset/Gain Coefficient Determination”
mode (SCALCN register), then write REG_AND_CNV_RST
= 0xC3 twice to get out of this mode.
After a register reset, any on-going conversions will be abort-
ed and restarted. If the device is in the power-down state, then
a register reset will bring it out of the power-down state.
To restart a conversion, write 1 to the RESTART bit. This bit
can be used to synchronize the conversion to an external
event.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMP90079 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Sensor AFE System: Multi-Channel, Low-Power 16-Bit |
| LMP90079MH/NOPB | 功能描述:模数转换器 - ADC 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 |
| LMP90079MHE/NOPB | 功能描述:模数转换器 - ADC 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 |
| LMP90079MHX/NOPB | 功能描述:模数转换器 - ADC 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 |
| LMP90080 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Sensor AFE System: Multi-Channel, Low-Power 16-Bit |
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