Analog Devices Six-Input Channel Analog Front End

The AD73360 is a six-input channel analog front-end processor designed for general purpose applications such as industrial power metering or multi-channel analog input. It features six 16-bit A/D conversion channels, each providing 77 dB signal-to-noise ratio over dc to 4 kHz signal bandwidth. Each channel also features a programmable input gain amplifier (PGA) with gain Settings in 8 stages, from 0 dB to 38 dB.

Schematic diagram

The AD73360 is particularly suitable for industrial power metering because each channel is sampled synchronously, ensuring no (phase) delay between conversions. The AD73360 also has low group delay conversion on all channels. The reference voltage on the chip is included, and can be programmed to accommodate 3v or 5v operation. The device's sampling rate is programmable in four different Settings, providing 64khz, 32khz, 16khz, and 8 kHz sampling rates (from the 16.384 MHz master clock).

Pin configuration

The serial port (SPORT) makes it easy to connect a single or cascading device to an industry standard DSP engine. The SPORT transfer rate is programmable, allowing interfaces to fast and slow DSP engines. The AD73360 is available in 28-pin SOIC and 44-pin TQFP packages.