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AD5667R Datasheet(PDF) 1 Page - Analog Devices |
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AD5667R Datasheet(HTML) 1 Page - Analog Devices |
1 / 32 page Dual, 12-/14-/16-Bit nanoDACs® with 5 ppm/°C On-Chip Reference, I2C® Interface AD5627R/AD5647R/AD5667R, AD5627/AD5667 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. FEATURES Low power, smallest pin-compatible, dual nanoDACs AD5627R/AD5647R/AD5667R 12-/14-/16-bit On-chip 1.25 V/2.5 V, 5 ppm/°C reference AD5627/AD5667 12-/16-bit External reference only 3 mm x 3 mm LFCSP and 10-lead MSOP 2.7 V to 5.5 V power supply Guaranteed monotonic by design Power-on reset to zero scale Per channel power-down Hardware LDAC and CLR functions I2C-compatible serial interface supports standard (100 kHz), fast (400 kHz), and high speed (3.4 MHz) modes APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators FUNCTIONAL BLOCK DIAGRAMS SDA SCL ADDR VDD GND POWER-ON RESET 1.25V/2.5V REF VREFIN/VREFOUT AD5627R/AD5647R/AD5667R POWER-DOWN LOGIC INPUT REGISTER DAC REGISTER STRING DAC A VOUTA BUFFER INPUT REGISTER DAC REGISTER STRING DAC B VOUTB LDAC CLR BUFFER Figure 1. AD5627R/AD5647R/AD5667R SDA SCL ADDR VDD GND POWER-ON RESET VREFIN AD5627/AD5667 POWER-DOWN LOGIC INPUT REGISTER DAC REGISTER STRING DAC A VOUTA BUFFER INPUT REGISTER DAC REGISTER STRING DAC B VOUTB LDAC CLR BUFFER Figure 2. AD5627/AD5667 GENERAL DESCRIPTION The AD5627R/AD5647R/AD5667R, AD5627/AD5667 members of the nanoDAC family are low power, dual, 12-, 14-, 16-bit buffered voltage-out DACs with/without on-chip reference. All devices operate from a single 2.7 V to 5.5 V supply, are guaranteed monotonic by design, and have an I2C- compatible serial interface. The AD5627R/AD5647R/AD5667R have an on-chip reference. The AD56x7RBCPZ have a 1.25 V, 5 ppm/°C reference, giving a full-scale output range of 2.5 V; the AD56x7RBRMZ have a 2.5 V, 5 ppm/°C reference, giving a full-scale output range of 5 V. The on-chip reference is off at power-up, allowing the use of an external reference. The internal reference is enabled via a software write. The AD5667 and AD5627 require an external reference voltage to set the output range of the DAC. The AD56x7R/AD56x7 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 per- channel power-down feature that reduces the current consumption of the device to 480 nA 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 on-chip precision output amplifier enables rail-to-rail output swing. The AD56x7R/AD56x7 use a 2-wire I2C-compatible serial interface that operates in standard (100 kHz), fast (400 kHz), and high speed (3.4 MHz) modes. Table 1. Related Devices Part No. Description AD5663 2.7 V to 5.5 V, dual 16-bit DAC, external reference, SPI® interface AD5623R/AD5643R/AD5663R 2.7 V to 5.5 V, dual 12-, 14-, 16-bit DACs, internal reference, SPI interface AD5625R/AD5645R/AD5665R, AD5625/AD5665 2.7 V to 5.5 V, quad 12-, 14-, 16-bit DACs, with/without internal reference, I2C interface |
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