MCP3918

The MCP3918 is a 2.7V to 3.6V single channel Analog Front End (AFE) containing a Delta-Sigma Analog-to-Digital Converter (ADC), PGA, internal voltage
reference, modulator output block, and highspeed 20 MHz SPI compatible serial interface. For polyphase shunt based energy meters, the MCP3918 2-wire serial
interface greatly reduces system cost requiring only a single bidirectional isolator per phase. The MCP3918 is capable of interfacing a large variety of voltage and current sensors including shunts, current transformers, Rogowski coils and Hall effect sensors

产品特性
  • 16/24-bit Resolution Delta-Sigma A/D Converter
  • Flexible serial interface that includes both SPI and a simple 2-wire interface ideal for polyphase shunt energy meters
  • 93.5 dB SINAD, -106.5 dBc THD
  • 2.7V - 3.6V AVDD, DVDD
  • Programmable Data Rate up to 125 ksps- 4 MHz Maximum Sampling Frequency
  • Oversampling Ratio up to 4096
  • Ultra Low Power Shutdown Mode with <2 µA
  • Low Drift 1.2V Internal Voltage Reference: 9 ppm/°C
  • Differential Voltage Reference Input Pins
  • High Gain PGA on Each Channel (up to 32V/V)
  • Phase Delay Compensation with 1 µs Time Resolution
  • Separate Data Ready Pin for Easy Synchronization
  • 24-bit Digital Offset and Gain Error Correction
  • High-Speed 20 MHz SPI Interface with Mode 0,0 and 1,1 Compatibility
  • Continuous Read/Write Modes for Minimum Communication
  • Low Power Consumption
  • Available in Small 20-lead QFN and SSOP Packages
  • Specifications valid down to -45°C operation
技术参数
Parameter Name Value Value
Measurement Error 0.1% 0.1%
Dynamic Range 10000:1 10000:1
Voltage Reference Drift ppm typ 9 9
PSRR % typ -73 dB -73 dB
Temp. Range (°C) -40 to 125 -40 to 125
Analog Supply Voltage AVdd Range (V) 2.7 to 3.6 2.7 to 3.6
Digital Supply Voltage DVdd Range (V) 2.7 to 3.6 2.7 to 3.6
文档资料
MCP3918 Data SheetData Sheets05/14/20146403KB
MCP3918 Rev. A Silicon Errata and Data Sheet ClarificationErrata07/10/2015165KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MCP3918A1-E/ML20QFN-40C to +125CTUBE1.601.331.211.171.16
MCP3918A1-E/SS20SSOP-40C to +125CTUBE1.551.291.181.141.12
MCP3918A1T-E/ML20QFN-40C to +125CT/R1.601.331.211.171.16
MCP3918A1T-E/SS20SSOP-40C to +125CT/R1.551.291.181.141.12
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器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MCP3918A1-E/ML0.0431000.07692320QFN4x4x0.9mmMatte Tine3
MCP3918A1T-E/ML0.0431000.21212120QFN4x4x0.9mmMatte Tine3
MCP3918A1-E/SS0.1642000.34328420SSOP.209inMatte Tine3
MCP3918A1T-E/SS0.1642000.41625020SSOP.209inMatte Tine3
MCP3918 Data Sheet MCP3918
MCP3918 Rev. A Silicon Errata and Data Sheet Clarification MCP3918