The AD7734 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with total conversion times of 500 µs (2 kHz channel switching) making it ideally suitable for high resolution multiplexing applications.
The AD7734 is based on a sigma-delta architecture and features up to 24 bits of no missing codes performance. The part can be configured via a simple digital interface, which allows users to balance the noise performance against data throughput up to a 12.3 kHz conversion rate. The analog front end features 4 single-ended input channels with unipolar or true bipolar input ranges to ±10 V while operating from a single 5 V analog supply. The part has an over-range and under-range detection capability and accepts an analog input over-voltage to ±16.5 V not degrading the performance of the adjacent channels. The differential reference input features “No Reference” detect capability.
The AD7734 contains self-calibration and per channel system calibration options. The digital serial interface can be configured for three wire operation and is compatible with microcontrollers and digital signal processors. All interface inputs are Schmitt triggered.
The part is specified for operation over the extended industrial temperature range of –40ºC to +105ºC and is available in 28-lead TSSOP package.
