AD5663 Datasheet | Analog Devices

FEATURES Low power, dual 16-bit nano DAC Relative accuracy: ±12 LSBs maximum Guaranteed monotonic by design 10-lead MSOP and 3 mm × 3 mm LFCSP_WD 2.7 V to 5.5 V power supply Per channel power-down Power-on reset to zero scale or midscale Hardware LDAC and CLR functions Serial interface; up to 50 MHz FUNCTIONAL BLOCK DIAGRAM VDD LDAC INPUT REGISTER INTERFACE LOGIC INPUT REGISTER DAC REGISTER STRING DAC B BUFFER VOUTB DAC REGISTER STRING DAC A VREF SCLK SYNC DIN BUFFER VOUTA POWER-ON RESET POWER-DOWN LOGIC 05855-001 LDAC CLR APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators Figure 1. Table 1. Related Devices Part No. AD5623R/AD5643R/AD5663R Description 2.7 V to 5.5 V, dual 12-/14-/16-bit DACs with internal reference GENERAL DESCRIPTION The AD5663, a member of the nano DAC family, is a low power, dual, 16-bit buffered voltage-out DAC that operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design. The AD5663 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 or midscale (AD5663-1) and remains there until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 480 n A at 5 V and provides software-selectable output loads while in power-down mode. The low power consumption of this part in normal operation makes it ideally suited to portable, battery-operated equipment. The power consumption is 1.25 m W at 5 V, going down to 2.4 μW in power-down mode. The on-chip precision output amplifier of the AD5663 allows rail-to-rail output swing to be achieved. The AD5663 uses a versatile, 3-wire serial interface that operates at clock rates up to 50 MHz and is patible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface...