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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： | 34/62页 |
| 文件大小： | 1721K |
| 代理商： | LMP90078MHX/NOPB |
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18.4 CHANNEL CONFIGURATION REGISTERS ............................................................................ 52
18.5 CALIBRATION REGISTERS .................................................................................................. 56
18.6 SENSOR DIAGNOSTIC REGISTERS ..................................................................................... 57
18.7 SPI REGISTERS .................................................................................................................. 58
18.8 GPIO REGISTERS ............................................................................................................... 60
19.0 Physical Dimensions .................................................................................................................... 61
List of Figures
FIGURE 1. Block Diagram ......................................................................................................................... 2
...................................................................................................................... 12
FIGURE 3. Simplified VIN Circuitry .............................................................................................................. 21
FIGURE 4. CLK Register Settings ............................................................................................................... 22
FIGURE 5. Digital Filter Response, 1.6775 SPS and 3.355 SPS .......................................................................... 24
FIGURE 6. Digital Filter Response, 6.71 SPS and 13.42 SPS .............................................................................. 24
FIGURE 7. Digital Filter Response at 13.42 SPS ............................................................................................. 25
FIGURE 8. Digital Filter Response, 26.83125 SPS and 53.6625 SPS .................................................................... 25
FIGURE 9. Digital Filter Response 107.325 SPS and 214.65 SPS ........................................................................ 26
FIGURE 10. Digital Filter Response for a 3.5717MHz versus 3.6864 MHz XTAL ...................................................... 26
FIGURE 11. GPIO Register Settings ............................................................................................................ 27
FIGURE 12. Types of Calibration ................................................................................................................ 27
FIGURE 13. BgcalMode2 Register Settings ................................................................................................... 28
FIGURE 14. System Calibration Data-Flow Diagram ......................................................................................... 28
FIGURE 15. Post-calibration Scaling Data-Flow Diagram ................................................................................... 29
FIGURE 16. Burnout Currents .................................................................................................................... 30
FIGURE 17. Burnout Currents Injection for ScanMode3 ..................................................................................... 30
FIGURE 18. Sensor Diagnostic Flags Diagram ............................................................................................... 31
FIGURE 19. Register Read/Write Protocol ..................................................................................................... 32
FIGURE 20. DRDYB Behavior .................................................................................................................... 33
FIGURE 21. DRDYB Behavior for an Incomplete ADC_DOUT Reading .................................................................. 33
FIGURE 22. DrdybCase1 Connection Diagram ............................................................................................... 34
FIGURE 23. Timing Protocol for DrdybCase1 ................................................................................................. 34
FIGURE 24. Timing Protocol for DrdybCase2 ................................................................................................. 35
FIGURE 25. DrdybCase3 Connection Diagram ............................................................................................... 36
FIGURE 26. Timing Protocol for DrdybCase3 ................................................................................................. 36
FIGURE 27. Timing Protocol for Reading SPI_CRC_DAT .................................................................................. 37
FIGURE 28. Timing Protocol for Reading SPI_CRC_DAT beyond normal DRDYB deassertion at every 1/ODR seconds ...... 37
FIGURE 29. Active, Power-Down, Stand-by State Diagram ................................................................................ 38
FIGURE 30. ADC_DOUT vs. VIN of a 16-Bit Resolution (VREF = 5.5V, Gain = 1). .................................................... 39
FIGURE 31. Register-Write Example 1 ......................................................................................................... 40
FIGURE 32. Register-Write Example 2 ......................................................................................................... 40
FIGURE 33. Register-Read Example ........................................................................................................... 41
FIGURE 34. Normal Streaming Example ....................................................................................................... 42
FIGURE 35. Setting up SPI_STREAMCN ...................................................................................................... 43
FIGURE 36. Controlled Streaming Example ................................................................................................... 44
FIGURE 37. Topology #1: 3-wire RTD Using 2 Current Sources ........................................................................... 45
FIGURE 38. Topology #2: 3-wire RTD Using 1 Current Source ............................................................................ 46
FIGURE 39. Thermocouple with CJC ........................................................................................................... 47
List of Tables
TABLE 1. ENOB (Noise Free Resolution) vs. Sampling Rate and Gain at VA = VIO = VREF = 3V ................................. 11
TABLE 2. RMS Noise (V) vs. Sampling Rate and Gain at VA = VIO = VREF = 3V .................................................... 11
TABLE 3. ENOB (Noise Free Resolution) vs. Sampling Rate and Gain at VA = VIO = VREF = 5V .................................. 11
TABLE 4. RMS Noise (V) vs. Sampling Rate and Gain at VA = VIO = VREF = 5V .................................................... 11
TABLE 5. Data First Mode Transactions ........................................................................................................ 36
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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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