AD5680

www.DataSheet4U.com 5 V 18-Bit nanoDACTM in a SOT-23 AD5680 FEATURES Single 18-bit nanoDAC 18-bit monotonic 12-bit accuracy guaranteed Tiny 8-lead SOT-23 package Power-on reset to zero scale/midscale 4.5 V to 5.5 V power supply Serial interface Rail-to-rail operation SYNC interrupt facility Temperature range −40°C to +105°C FUNCTIONAL BLOCK DIAGRAM VREF GND VDD VFB POWER-ON RESET OUTPUT BUFFER DAC REGISTER REF(+) 18-BIT DAC VOUT INPUT CONTROL LOGIC Closed-loop process control Low bandwidth data acquisition systems Portable battery-powered instruments Gain and offset adjustment Precision setpoint control SYNC SCLK DIN Figure 1. GENERAL DESCRIPTION The AD5680, a member of the nanoDAC family, is a single, 18-bit buffered voltage-out DAC that operates from a single 4.5 V to 5.5 V supply and is 18-bit monotonic. The AD5680 requires an external reference voltage to set the output range of the DAC. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V (AD5680-1) or to midscale (AD5680-2) and remains there until a valid write takes place. The low power consumption of this part in normal operation makes it ideally suited to portable battery-operated equipment. The power consumption is 1.6 mW at 5 V. The AD5680 on-chip precision output amplifier allows rail-torail output swing to be achieved. For remote sensing applications, the output amplifier’s inverting input is available to the user. The AD5680 uses a versatile 3-wire serial inter...