AD7730LBRZ

The AD7730LBRZ is a complete analog front end for weigh-scale and pressure measurement applications, designed by Analog Devices. It accepts low-level signals directly from a bridge transducer and outputs a serial digital word via an SPI interface. The device incorporates a 24-bit sigma-delta modulator with a programmable gain front end, providing resolution of 230,000 counts peak-to-peak. Key specifications include a sampling rate of 5 MS/s (manufacturer-specified, low confidence), a signal-to-noise ratio of 114 dB, offset drift of 5 nV/°C, and gain drift of 2 ppm/°C. The input voltage range is programmable: ±10 mV, ±20 mV, ±40 mV, or ±80 mV for bipolar operation, or 0 to +10 mV, +20 mV, +40 mV, +80 mV for unipolar operation. It operates with a reference voltage of 1 V to 5 V and a supply voltage of 5 V (4.75 V to 5.25 V), with typical power dissipation of 32.5 mW and maximum 125 mW. The device is housed in a 24-SOIC surface-mount package with tin, matte contact plating, and operates over a temperature range of -40°C to +85°C. It is RoHS compliant (unverified).