AFEs integrate 8 24-bit ADCs & boast 94.5 dB SINAD

The MCP3913 and MCP3914 integrate 6 and 8 24-bit, delta-sigma ADCs, respectively, with 94.5 dB SINAD, -106.5 dB THD and 112 dB SFDR for high-accuracy signal acquisition and higher-performing end-products. The MCP3914 features two additional ADCs which enable the monitoring of more sensors with one chip, thereby lowering cost and size.

The programmable data rate of up to 125ksps, with low-power modes, allows designers to scale down for better power consumption or to use higher data rates for advanced signal analysis, such as calculating harmonic content. Further to this, the devices also boast increased robustness due to a CRC-16 checksum and register-map lock. The company claims that the devices improve application performance with their industry-leading accuracy, while providing the flexibility to adjust the data rate to optimise each application’s rate of performance versus power consumption.

In addition to the two devices, Microchip have also released 2 tools to aid in the development of high-accuracy energy measurement systems for 3-phase metering and multiple-load monitoring using these AFEs. The MCP3913 Evaluation Board (ADM00522) and MCP3914 Evaluation Board (ADM00523) can be purchased and are priced at $99.99 each.