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AD5628BRUZ-1 Fiches technique(PDF) 1 Page - Analog Devices |
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AD5628BRUZ-1 Fiches technique(HTML) 1 Page - Analog Devices |
1 / 32 page Octal, 12-/14-/16-Bit SPI Voltage Output denseDAC with 5 ppm/°C On-Chip Reference Data Sheet AD5628/AD5648/AD5668 Rev. G Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©2005–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Low power, small footprint, pin-compatible octal DACs AD5668: 16 bits AD5648: 14 bits AD5628: 12 bits 14-lead/16-lead TSSOP, 16-lead LFCSP, and 16-lead WLCSP On-chip 1.25 V/2.5 V, 5 ppm/°C reference Power down to 400 nA @ 5 V, 200 nA @ 3 V 2.7 V to 5.5 V power supply Guaranteed monotonic by design Power-on reset to zero scale or midscale 3 power-down functions Hardware LDAC and LDAC override function CLR function to programmable code Rail-to-rail operation APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators FUNCTIONAL BLOCK DIAGRAM INTERFACE LOGIC INPUT REGISTER DIN LDAC GND VOUTH VDD LDAC1 VREFIN/VREFOUT SYNC SCLK AD5628/AD5648/AD5668 CLR1 1RU-16 PACKAGE ONLY 1.25V/2.5V REF VOUTA VOUTB VOUTC VOUTD VOUTE VOUTF VOUTG DAC REGISTER STRING DAC A BUFFER INPUT REGISTER DAC REGISTER STRING DAC B BUFFER INPUT REGISTER DAC REGISTER STRING DAC C BUFFER INPUT REGISTER DAC REGISTER STRING DAC D BUFFER INPUT REGISTER DAC REGISTER STRING DAC E BUFFER INPUT REGISTER DAC REGISTER STRING DAC F BUFFER INPUT REGISTER DAC REGISTER STRING DAC G BUFFER INPUT REGISTER DAC REGISTER STRING DAC H BUFFER POWER-DOWN LOGIC POWER-ON RESET Figure 1. GENERAL DESCRIPTION The AD5628/AD5648/AD5668 devices are low power, octal, 12-/14-/16-bit, buffered voltage-output DACs. All devices operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design. The AD5668 and AD5628 are available in both a 4 mm × 4 mm LFCSP and a 16-lead TSSOP, while the AD5648 is available in both a 14-lead and 16-lead TSSOP. The AD5628/AD5648/AD5668 have an on-chip reference with an internal gain of 2. The AD5628-1/AD5648-1/AD5668-1 have a 1.25 V 5 ppm/°C reference, giving a full-scale output range of 2.5 V; the AD5628-2/AD5648-2/AD5668-2 and AD5668-3 have a 2.5 V 5 ppm/°C reference, giving a full-scale output range of 5 V. The on-board reference is off at power-up, allowing the use of an external reference. The internal reference is enabled via a software write. The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V (AD5628-1/AD5648-1/AD5668-1, AD5628-2/AD5648-2/AD5668-2) or midscale (AD5668-3) and remains powered up at this level until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 400 nA at 5 V and provides software- selectable output loads while in power-down mode for any or all DAC channels. The outputs of all DACs can be updated simul- taneously using the LDAC function, with the added functionality of user-selectable DAC channels to simultaneously update. There is also an asynchronous CLR that updates all DACs to a user- programmable code—zero scale, midscale, or full scale. The AD5628/AD5648/AD5668 utilize a versatile 3-wire serial interface that operates at clock rates of up to 50 MHz and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. The on-chip precision output amplifier enables rail-to-rail output swing. PRODUCT HIGHLIGHTS 1. Octal, 12-/14-/16-bit DAC. 2. On-chip 1.25 V/2.5 V, 5 ppm/°C reference. 3. Available in 14-lead/16-lead TSSOP, 16-lead LFCSP, and 16-lead WLCSP. 4. Power-on reset to 0 V or midscale. 5. Power-down capability. When powered down, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V. |
Numéro de pièce similaire - AD5628BRUZ-1 |
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Description similaire - AD5628BRUZ-1 |
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