ADCs feature power scaling for high precision medical and industrial applications

22-02-2017 | Digikey | Power

ADI's AD7761, available now from Digi-Key, is an eight-channel, simultaneous sampling S-? ADC with a S-? modulator and digital filter per channel, enabling synchronized sampling of AC and DC signals. The device achieves 97.7dB dynamic range at a maximum input bandwidth of 110.8kHz, combined with typical performance of ±1LSB integral nonlinearity (INL), ±1LSB offset error, and ±5LSB gain error. The user can trade off input bandwidth, output data rate, and power dissipation. Select one of three power modes to optimize for noise targets and power consumption. The flexibility of the device allows it to become a reusable platform for low power DC and high performance ac measurement modules.

The device operates with a 5V AVDD1A and AVDD1B supply, a 2.25V to 5V AVDD2A and AVDD2B supply, and a 2.5V to 3.3V or 1.8V IOVDD supply (see the 1.8V IOVDD Operation section for specific requirements for operating at 1.8V IOVDD). The device requires an external reference; the absolute input reference voltage range is 1V to AVDD1 - AVSS. The device comes in a small 10mm x 10mm 64-lead LQFP.

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