MCP3918 Series

24-Bit, 125kSPS, Single Channel AFE

Catalog

24-Bit, 125kSPS, Single Channel AFE

Part	Supplier Device Package	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Number of Bits	Mounting Type	Number of Channels	Package / Case	Measurement Error	Voltage - I/O Low	Voltage - Supply [Min]	Voltage - Supply [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Current - Supply	Voltage - I/O High	Meter Type
Microchip Technology MCP3918A1-E/SSVAO	20-SSOP	3.6 V	2.7 V	2.7 V	3.6 V	16 24	Surface Mount	1	20-SSOP
Microchip Technology MCP3918A1-E/SS	20-SSOP						Surface Mount		20-SSOP	0.1 %	0.3 V	2.7 V	3.6 V	125 °C	-40 °C	800 çA	0.7 V	Single Phase
Microchip Technology MCP3918A1T-E/SS	20-SSOP						Surface Mount		20-SSOP	0.1 %	0.3 V	2.7 V	3.6 V	125 °C	-40 °C	800 çA	0.7 V	Single Phase

Catalog

24-Bit, 125kSPS, Single Channel AFE

Key Features

- Enables 0.1% Typical Active Power Measurement Error over a 10,000:1 Dynamic Range

- 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

- Flexible serial interface that includes both SPI and a simple 2-wire interface ideal for polyphase shunt energy meters

- Phase Delay Compensation with 1 µs Time Resolution

- Separate Data Ready Pin for Easy Synchronization

- 24-bit Digital Offset and Gain Error Correction

- High Gain PGA (up to 32V/V)

- High-Speed 20 MHz SPI Interface with Mode 0,0 and 1,1 Compatibility

- Low Power Consumption

- Continuous Read/Write Modes for Minimum Communication

- Available in Small 20-lead QFN and SSOP Packages

- AEC-Q100 Grade 1

Description

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. It is ca[able of supporting a dynamic range of 10000:1. The MCP391x portfolio of Analog Front Ends feature performance and functionality which makes them appropriate for use in designs targeted to meet the following industry standards for smart metering applications: IEC62053-11, IEC62053-21, IEC62053-22, ANSI C12.20. In such designs, the MCP391x portfolio can be paired with either MCUs/MPUs which are running a metrology engine, or standard (non-Metrology) MCUs/MPUs. *Please contact jeff.keip@microchip.com if you need something you are unable to find on this page*