DESCRIPTION The AD7294 contains all the functions required for general-purpose monitoring and control of current, voltage, and temperature integrated into a single-chip solution. The part includes low voltage ( 200 mV) analog input sense amplifiers for current monitoring across shunt resistors, temperature sense into a SAR analog-to-digital converter (ADC) with a 3 s conver-sion time. A high accuracy internal reference is provided to drive both the digital-to-analog converter (DAC) and ADC. Four 12-bit DACs provide the outputs for voltage control. The AD7294 also includes limit registers for alarm functions. The part is designed on Analog Devices, Inc., high voltage DMOS process for high voltage compliance, 59.4 V on the current sense inputs, and up to a 15 V DAC output voltage. The AD7294 is a highly integrated solution that offers all the in cellular base station applications. In these types of applications, the DACs provide 12-bit resolution to control the bias currents of the power FEATURES 12-bit SAR ADC with 3 s conversion time 4 uncommitted analog inputs Differential/single-ended VREF, 2 VREF input ranges 2 high-side current sense inputs 5 V to 59.4 V operating range 0.5% max gain error 200 mV input range 2 external diode temperature sensor inputs 2 C accuracy Series resistance cancellation 1 internal temperature sensor 2 C accuracy Built-in monitoring features Minimum/maximum recorder for each channel Programmable alert thresholds Programmable hysteresis Four 12-bit monotonic 15 V DACs 5 V span, 0 V to 10 V offset 8 s settling time 10 mA sink and source capability Power-on resets (POR) to 0 V Internal 2.5 V reference 2-wire fast mode I2C interface Temperature range: 40 C to +105 C APPLICATIONS Cellular base stations GSM, EDGE, UMTS, CDMA, TD-SCDMA, W-CDMA, WiMAX Point-to-multipoint and other RF transmission systems 12 V, 24 V, 48 V automotive applications Industrial controls GENERAL DESCRIPTION The AD7294 contains all the functions required for general-purpos Specifications subject to change without notic