ADuM7704, capable of on-chip digital isolation
Accepts pseudodifferential input signals up to ±64mV
Converts analog input to 21MHz digital


Mouser Electronics announced on the 8th that it is now stocking Analog Devices' (ADI) 'ADuM7704 sigma-delta modulator.'

The ADuM7704 modulator converts analog input signals into high-speed, single-bit data streams using on-chip digital isolation based on ADI's iCoupler® technology. It operates over a 4.5 V to 20 V supply range and can accommodate pseudo-differential input signals with a typical ±50 mV and a maximum ±64 mV.

The ADuM7704 modulator, with pseudo-differential input performance suitable for monitoring shunt voltages in high-voltage applications requiring galvanic isolation, continuously samples analog inputs through a high-performance analog modulator and converts them into a single-bit digital output stream with data rates up to 21 MHz.

The ADuM7704 modulator achieves a signal-to-noise ratio (SNR) of 82 dB through a sinc3 digital filter. High signal-to-noise ratio (SNR) enables more accurate current and voltage measurements, improving motor drive performance. It is suitable for shunt current monitoring, AC motor control, and inverter applications, replacing analog-to-digital converters (ADCs) and opto-isolators.