AD7711ARZ

The AD7711ARZ is a complete analog front end for low frequency measurement applications from Analog Devices. It accepts low level signals directly from a transducer and outputs a serial digital word. The device employs a charge-balancing conversion technique to achieve 24 bits of no missing codes performance. It features a programmable gain front end (PGA) with gains from 1 to 128, one differential analog input and one single-ended analog input, and a differential reference input. The on-chip digital filter allows adjustment of filter cutoff and settling time. The part includes an internal 2.5V reference and RTD excitation current sources. It operates from a 5V supply and has a low power dissipation of 25 mW typical, with a power-down mode consuming 7 mW typical. The AD7711ARZ is available in a 24-SOIC surface-mount package with an operating temperature range of -40°C to 85°C. It communicates via an SPI interface and supports external or internal reference.