Low Noise Amplifier for Use with PCB-Based di/dt Sensors and ADE9039

The ADEMO139B is a low-drift fully-differential programmable-gain amplifier, for use with a PCB-based di/dt current sensor and the ADE9039 energy metering chipset. An output common-mode (CM) voltage of 0.33V and supply voltage of 3.3V allows direct connection to the ADE9039.

The ADEMO139B has high gain, low noise, and excellent common- mode rejection ratio (CMRR) and power-supply rejection ratio (PSRR) specifications, which makes it ideal for high-accuracy energy measurement applications. The ADEMO139B is specified over the extended industrial temperature (−40°C to +125°C), and is available in a 8-lead LFCSP.

APPLICATIONS

* Single-phase energy meters

* Polyphase energy meters

* Split-phase energy meters

* Power quality monitoring

* Protective devices

* Smart breakers

* EV chargers

* Machine health

* Smart power distribution units

* Single-supply operation: 2.97V to 3.63V

* Three configurable gain options

* Av setting = 30 (actual gain = 27.46)

* Av setting = 45 (actual gain = 42.93)

* Av setting = 60 (actual gain = 59.77)