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AD5666BRUZ-2 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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AD5666BRUZ-2 bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 28 page Quad, 16-Bit DAC with 5 ppm/°C On-Chip Reference in 14-Lead TSSOP AD5666 Rev. A 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 © 2005 Analog Devices, Inc. All rights reserved. FEATURES Low power quad 16-bit DAC 14-lead TSSOP 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 with LDAC override function CLR function to programmable code SDO daisy-chaining option 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 VDD LDAC VREFIN/VREFOUT SYNC SCLK AD5666 CLR 1.25V/2.5V REF VOUTA VOUTB VOUTC VOUTD 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 SDO POR POWER-DOWN LOGIC POWER-ON RESET Figure 1. GENERAL DESCRIPTION The AD5666 is a low power, quad, 16-bit, buffered voltage- output DAC. The part operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design. The AD5666 has an on-chip reference with an internal gain of 2. The AD5666-1 has a 1.25 V 5 ppm/°C reference, giving a full-scale output of 2.5 V; the AD5666-2 has a 2.5 V 5 ppm/°C reference, giving a full-scale output of 5 V. The on-board reference is off at power-up, allowing the use of an external reference. The internal reference is turned on by writing to the DAC. The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V (POR pin low) or to midscale (POR pin high) 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 simultaneously using the LDAC function, with the added functionality of user-select- able DAC channels to simultaneously update. There is also an asynchronous CLR that clears all DACs to a software-selectable code—0 V, midscale, or full scale. The AD5666 utilizes 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. Quad, 16-bit DAC. 2. On-chip 1.25 V/2.5 V, 5 ppm/°C reference. 3. Available in 14-lead TSSOP. 4. Selectable 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. |
Số phần tương tự - AD5666BRUZ-2 |
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Mô tả tương tự - AD5666BRUZ-2 |
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