How do I configure the MAX14001 device for ADC measurements only?

To use this device for ADC measurements only (i.e. without the inrush current limiting circuitry), use the following hardware and firmware configurations: Hardware: Connect 120kΩ resistor from ISET to GNDF Connect IFET to GNDF Connect 10nF capacitor from GATE to GNDF Firmware: Initialization Values: MAX14001_write(MAX14001_WVR_adr, 0x294); MAX14001_write(MAX14001_FLTEN_adr, 0x7e); // disable MVL and FET MAX14001_write(MAX14001_CFG_adr, 0x0c); // Set filter to x8 MAX14001_write(0x10 + MAX14001_WVR_adr, 0x294); // write verification register MAX14001_write(0x10 + MAX14001_FLTEN_adr, 0x7e); // write verification register MAX14001_write(0x10 + MAX14001_CFG_adr, 0x0c); // write verification register ADC Read Command: MAX14001_read(MAX14001_ADC_adr); Register Definitions: /* Register_Name Direction */ /*---------------------------------------------*/ #define MAX14001_ADC_adr = 0x00; /* ADC R/W */ #define MAX14001_FADC_adr = 0x01; /* Filtered ADC R/W */ #define MAX14001_FLAGS_adr = 0x02; /* Error Flags R/W */ #define MAX14001_FLTEN_adr = 0x03; /* FAULT Enable R/W */ #define MAX14001_THL_adr = 0x04; /* Lower Threshold R/W */ #define MAX14001_THU_adr = 0x05; /* Upper Threshold R/W */ #define MAX14001_INRR_adr = 0x06; /* Inrush Reset R/W */ #define MAX14001_INRT_adr = 0x07; /* Inrush Trigger R/W */ #define MAX14001_INRP_adr = 0x08; /* Inrush Pulse R/W */ #define MAX14001_CFG_adr = 0x09; /* Configuration R/W */ #define MAX14001_ENBL_adr = 0x0a; /* Enable R/W */ #define MAX14001_WVR_adr = 0x0c; /* Write Verification R/W */ // verification registers #define MAX14001_FLTV_adr = 0x13; /* FAULT Enable verification R/W */ #define MAX14001_THLV_adr = 0x14; /* Lower Threshold verification R/W */ #define MAX14001_THUV_adr = 0x15; /* Upper Threshold verification R/W */ #define MAX14001_INRRV_adr = 0x16; /* Inrush Reset verification R/W */ #define MAX14001_INRTV_adr = 0x17; /* Inrush Trigger verification R/W */ #define MAX14001_INRPV_adr = 0x18; /* Inrush Pulse verification R/W */ #define MAX14001_CFGV_adr = 0x19; /* Configuration verification R/W */ #define MAX14001_ENBLV_adr = 0x1a; /* Enable verification R/W */

A high level of EMI observed at 905 MHz even with the MAX14001PMB eval kit during certification. What could explain this phenomenon and are there any design tips to reduce this noise?

Answer: The emissions (EMI) are coming from MAX14001/MAX14002. The component has internal digital isolator which oscillates at those frequencies. This is a common behavior, but we haven't reported it. One of the ways of reducing the radiation could be using external shielding. We have similar devices in our portfolio ( ADE1201 and ADE1202 ) and they also have internal digital isolators which have emissions in hundreds of MHz range, but we didn't measure their level. The article below also covers EMI mitigation techniques extensively- AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices | Analog Devices