ADI AD7710ANZ

The AD7710 is a complete low-power analog front end suitable for low-frequency measurement applications. The device can directly accept low-level signals from strain gauges or sensors and output serial digital words. It uses Sigma-Delta conversion technology to achieve up to 24-bit no missing code performance. The input signal is applied to a proprietary programmable gain front end based on an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of the digital filter can be programmed through the on-chip control register, allowing adjustment of the filter's cutoff frequency and settling time. The device has two differential analog inputs and one differential reference input. Typically, one channel will be used as the main channel, and the second channel will be used as an auxiliary input to periodically measure a second voltage. As long as the input signal on the analog input is greater than -30 mV, a single power supply can be used by connecting the VSS pin to AGND. By making the VSS pin negative, the device can convert signals on the input down to -VREF. Therefore, the AD7710 performs all signal conditioning and conversion for single-channel or dual-channel systems. The AD7710 is well-suited for use in intelligent, microcontroller-based systems. Input channel selection, gain setting, and signal polarity can be configured in software using a bidirectional serial port. The AD7710 includes self-calibration, system calibration, and background calibration options and allows the user to read and write to the on-chip calibration registers. The CMOS architecture ensures low power consumption, and the software-programmable shutdown mode reduces standby power consumption to only 7 mW (typical). The device is available in 24-pin, 0.3-inch-wide plastic and hermetic dual in-line packages (DIP), as well as a 24-pin small outline integrated circuit (SOIC) package.

• Weighing scales
• Thermocouples
• Process control
• Smart transmitters
• Chromatographs