AD7714AR-5

The AD7714AR-5 is a complete analog front-end for low-frequency measurement applications, employing a sigma-delta conversion architecture to achieve 24-bit resolution with no missing codes. It accepts low-level signals directly from transducers and outputs a serial digital word via SPI or DSP interfaces. The device includes a programmable gain amplifier (PGA) with gains from 1 to 128, allowing it to handle a wide range of input signal amplitudes. It offers three fully differential analog inputs that can be configured as five pseudo-differential inputs, giving flexibility in multi-channel systems. The ADC operates from a single supply voltage of 3 V to 5.25 V and consumes typically 350 µA of current, with a power-down mode reducing consumption to 5 µA. The on-chip digital filter provides programmable cutoff frequencies and settling times. The AD7714AR-5 is designed for applications such as portable industrial instruments, weigh scales, loop-powered systems, and pressure transducers. It is housed in a 24-lead SOIC package (0.295\" width, 7.50mm) and is rated for operation from -40°C to +85°C. The part requires an external voltage reference and supports both differential and pseudo-differential input configurations.