AD5643R Datasheet | Analog Devices

FEATURES Low power, smallest pin-patible, dual nano DAC AD5663R: 16 bits AD5643R: 14 bits AD5623R: 12 bits User-selectable external or internal reference External reference default On-chip 1.25 V/2.5 V, 5 ppm/°C reference 10-lead MSOP and 3 mm × 3 mm LFCSP 2.7 V to 5.5 V power supply Guaranteed monotonic by design Power-on reset to zero scale Per channel power-down Serial interface up to 50 MHz Hardware LDAC and CLR functions FUNCTIONAL BLOCK DIAGRAM VDD LDAC INPUT REGISTER INTERFACE LOGIC INPUT REGISTER DAC REGISTER STRING DAC B BUFFER VOUTB DAC REGISTER STRING DAC A VREFIN /VREFOUT 1.25V/2.5V REFERENCE BUFFER VOUTA SCLK SYNC AD5623R/AD5643R/AD5663R POWER-ON RESET POWER-DOWN LOGIC 05858-001 LDAC CLR Figure 1. APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators Table 1. Related Devices Part No. AD5663 Description 2.7 V to 5.5 V, dual 16-bit nano DAC, with external reference GENERAL DESCRIPTION The AD5623R/AD5643R/AD5663R, members of the nano DAC family, are low power, dual 12-, 14-, and 16-bit buffered voltageout digital-to-analog converters (DAC) that operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design. The AD5623R/AD5643R/AD5663R have an on-chip reference. The AD5623R-3/AD5643R-3/AD5663R-3 have a 1.25 V, 5 ppm/°C reference, giving a full-scale output of 2.5 V; and the AD5623R-5/ AD5643R-5/AD5663R-5 have a 2.5 V, 5 ppm/°C reference, giving a full-scale output of 5 V. The on-chip reference is off at power-up, allowing the use of an external reference; and all devices can be operated from a single 2.7 V to 5.5 V supply. The internal reference is turned on by writing to the DAC. The parts incorporate a power-on reset circuit that ensures the DAC output powers up to 0 V and remains there until a valid write takes place. The part contains a power-down feature that reduces the current...