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參數(shù)資料
| 型號(hào)： | LMP90078MHE/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封裝： | LEAD FREE, PLASTIC, MO-153, TSSOP-28 |
| 文件頁數(shù)： | 20/62頁 |
| 文件大?。?/td> | 1721K |
| 代理商： | LMP90078MHE/NOPB |
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16.1.8 GPIO (D0–D6)
Pins D0-D6 are general purpose input/output (GPIO) pins that
can be used to control external LEDs or switches. Only a high
or low value can be sourced to or read from each pin.
Figure 11 shows a flowchart how these GPIOs can be pro-
grammed.
30169733
FIGURE 11. GPIO Register Settings
16.2 CALIBRATION
As seen in Figure 12, there are two types of calibration: back-
ground calibration and system calibration. These calibrations
are further described in the next sections.
30169779
FIGURE 12. Types of Calibration
16.2.1 Background Calibration
Background calibration is the process of continuously deter-
mining and applying the offset and gain calibration coeffi-
cients to the output codes to minimize the LMP900xx’s offset
and gain errors. Background calibration is a feature built into
the LMP900xx and is automatically done by the hardware
without interrupting the input signal.
Four differential channels, CH0-CH3, each with its own gain
and ODRs, can be calibrated to improve the accuracy.
Types of Background Calibration:
Figure 12 also shows that there are two types of background
calibration:
1.
Type 1: Correction - the process of continuously
determining and applying the offset and gain calibration
coefficients to the output codes to minimize the
LMP900xx’s offset and gain errors.
This method keeps track of changes in the LMP900xx's
gain and offset errors due to changes in the operating
condition such as voltage, temperature, or time.
2.
Type 2: Estimation - the process of determining and
continuously applying the last known offset and gain
27
www.national.com
LMP90080/LMP90079/LMP90078/LMP90077
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMP90078MHX/NOPB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| LMP90079 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Sensor AFE System: Multi-Channel, Low-Power 16-Bit |
| LMP90079MH/NOPB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| LMP90079MHE/NOPB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| LMP90079MHX/NOPB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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