Microchip Technology introduced the MCP3901 Analog Front End (AFE) for metering applications. The MCP3901 AFE features high-accuracy, dual 16-/24-bit Delta-Sigma Analog-to-Digital Converters (ADCs) with up to 91 dB Signal to Noise and Distortion (SINAD), internal Programmable Gain Amplifiers (PGAs) and voltage reference, phase-delay compensation, and a modulator output block that enables more precise measurements than competitive solutions. The MCP3901 AFE is available in a 20-pin SSOP package, for $1.42 each in 10,000-unit quantities.
Integrated PGAs and a low-drift voltage reference enhance the MCP3901 AFE’s ability to measure signals at very small levels, and reduce the number of external components needed. This enables smaller overall designs at lower costs. The phase-delay compensation block enables the MCP3901 AFE to compensate for differences in phase for three-phase energy-metering applications, while the SPI interface provides a simple connection to a microcontroller (MCU) and offers engineers more flexibility with their design. In addition, through the SPI interface, designers can adjust the ADC oversampling ratio to control the resolution and sample rate as dictated by the needs of the application.
The MCP3901 AFE simplifies the development of metering, power monitoring, and instrumentation applications. The AFE enables engineers to develop high-precision applications, combined with the flexibility to adjust the resolution and speed to meet the needs of their designs. The MCP3901 AFE is ideal for a variety of single- and multi-phase metering, industrial, and medical applications. Example applications for the MCP3901 AFE include single and multi-phase electricity meters, power monitoring, instrumentation, blood glucose meters, and pulse oximeters.
More info: Microchip Technology