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| 型号： | LMP90079MH/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： | 12/62页 |
| 文件大小： | 1721K |
| 代理商： | LMP90079MH/NOPB |
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6.0 Block Diagram
30169775
FIGURE 1. Block Diagram
True Continuous Background Calibration
The LMP90080/LMP90079/LMP90078/LMP90077 feature a
16 bit
ΣΔ core with continuous background calibration to com-
pensate for gain and offset errors in the ADC, virtually elimi-
nating any drift with time and temperature. The calibration is
performed in the background without user or ADC input in-
terruption, making it unique in the industry and eliminating
down time associated with field calibration required with other
solutions. Having this continuous calibration improves perfor-
mance over the entire life span of the end product.
Continuous Background Sensor Diagnostics
Sensor diagnostics are also performed in the background,
without interfering with signal path performance, allowing the
detection of sensor shorts, opens, and out-of-range signals,
which vastly improves system reliability. In addition, the fully
flexible input multiplexer described below allows any input pin
to be connected to any ADC input channel providing addi-
tional sensor path diagnostic capability.
Flexible Input MUX Channels
The flexible input MUX allows interfacing to a wide range of
sensors such as thermocouples, RTDs, thermistors, and
bridge sensors. The LMP90080/LMP90079’s multiplexer sup-
ports 4 differential channels while the LMP90078/LMP90077
supports 2. Each effective input voltage that is digitized is VIN
= VINx – VINy, where x and y are any input. In addition, the
input multiplexer of the LMP90080/LMP90079 also supports
7 single-ended channels (LMP90078/LMP90077 supports 4),
where the common ground is any one of the inputs.
Programmable Gain Amplifiers (FGA & PGA)
The LMP90080/LMP90079/LMP90078/LMP90077 contain
an internal 16x fixed gain amplifier (FGA) and a 1x, 2x, 4x, or
8x programmable gain amplifier (PGA). This allows accurate
gain settings of 1x, 2x, 4x, 8x, 16x, 32x, 64x, or 128x through
configuration of internal registers. Having an internal amplifier
eliminates the need for external amplifiers that are costly,
space consuming, and difficult to calibrate.
Excitation Current Sources (IB1 & IB2) - LMP90080/
LMP90078
Two matched internal excitation currents, IB1 and IB2, can be
used for sourcing currents to a variety of sensors. The current
range is from 100 A to 1000 A in steps of 100 A.
www.national.com
2
LMP90080/LMP90079/LMP90078/LMP90077
相关PDF资料 |
PDF描述 |
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| LMP90079MHE/NOPB | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| LMP90078MHX/NOPB | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| LMP90078MHE/NOPB | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| LMP90079MHX/NOPB | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| LMP90080MHE/NOPB | SPECIALTY ANALOG CIRCUIT, PDSO28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| LMP90080MH/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 |
| LMP90080MHE/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 |
| LMP90080MHX/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 |
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