ANALOG DEVICES AD7780BRUZ Analogue to Digital Converter, 24 bit, 16.7 SPS, Differential, SPI, Single, 2.7 V

AD7780BRUZ is a 24bit, pin-programmable, ultralow power sigma-delta ADC. It is a complete low power front-end solution for bridge sensor products, including weigh scales, strain gages, and pressure sensors. It is particularly suitable for portable or battery-operated products where very low power is required. The AD7780 also has a power-down mode that allows the user to switch off the power to the bridge sensor and power down the AD7780 when not converting, thus increasing the battery life of the product. For ease of use, all the features of the AD7780 are controlled by dedicated pins. Each time a data read occurs, eight status bits are appended to the 24bit conversion. These status bits contain a pattern sequence that can be used to confirm the validity of the serial transfer. It is used in applications such as weigh scales, pressure measurement, industrial process control, portable instrumentation.

• Pin-programmable in-amp gain, pin-programmable power-down and reset
• Status function, internal clock oscillator, internal bridge power-down switch
• Simultaneous 50Hz/60Hz rejection, power supply range from 2.7V to 5.25V
• 2-wire serial interface (read-only device), SPI compatible, Schmitt trigger on SCLK
• Integral nonlinearity is ±6ppm of FSR typical at (AVDD = 2.7V to 5.25V)
• Current is 115?A typical at (gain = 1, AVDD = 3V)
• Input capacitance is 10pF typical at (AVDD = 2.7V to 5.25V)
• Gain drift vs. temperature is ±2ppm/°C typical at (AVDD = 2.7V to 5.25V)
• Input currents is ±2?A typical at (AVDD = 2.7V to 5.25V)
• Operating temperature range from -40°C to +105°C, 16-lead TSSOP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party