The AD7091R-4BCPZ is a 4-channel, 12-bit, successive-approximation-register (SAR) analog-to-digital (ADC) converter with SPI interface manufactured by Analog Devices. It is designed for low-power, precision data conversion across a wide range of applications, from medical to general-purpose. The AD7091R-4BCPZ features a 2.048V reference (typical), low noise, and fast conversion rates (up to 1.5Msps!) making it an ideal solution for many applications. Additionally, its small size (4mm x 4 mm, 36-bump WLCSP) makes it suitable for space-constrained applications such as cellular handsets and portable handheld devices.