Microchip微芯 MCP3918 产品介绍
说明
MCP3918是一款2.7V至3.6V的单通道模拟前端（AFE），包含德尔塔-西格玛模数转换器（ADC）、PGA、内部参考电压、调制器输出块和高速20MHz SPI兼容串行接口。对于基于多相并联的电能表，MCP3918 2线串行接口大大降低了每相仅需一个双向隔离器的系统成本。MCP3918能够连接各种电压和电流传感器，包括分流器、电流互感器、Rogowski线圈和霍尔效应传感器。它可以支持10000:1的动态范围
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特性
Enables 0.1% Typical Active Power Measurement Error over a 10,000:1 Dynamic Range93.5 dB SINAD, -106.5 dBc THD2.7V - 3.6V AVDD, DVDDProgrammable Data Rate up to 125 ksps- 4 MHz Maximum Sampling FrequencyOversampling Ratio up to 4096Ultra Low Power Shutdown Mode with <2 µALow Drift 1.2V Internal Voltage Reference: 9 ppm/°CDifferential Voltage Reference Input PinsFlexible serial interface that includes both SPI and a simple 2-wire interface ideal for polyphase shunt energy metersPhase Delay Compensation with 1 µs Time ResolutionSeparate Data Ready Pin for Easy Synchronization24-bit Digital Offset and Gain Error CorrectionHigh Gain PGA (up to 32V/V)High-Speed 20 MHz SPI Interface with Mode 0,0 and 1,1 CompatibilityLow Power ConsumptionContinuous Read/Write Modes for Minimum CommunicationAvailable in Small 20-lead QFN and SSOP PackagesAEC-Q100 Grade 1参数
类型 | 描述 |
Resolution | 24 |
Sample Rate kSPS Max | 125 |
Input Channels Differential | 1 |
SNRTyp | 94 |
SFDRTyp | 112 |
ENOB | 15.2 |
INLTypLSB | 5 |
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