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AD5734R Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD5734R Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 20 page Quad, 12-Bit, Serial Input, Unipolar/Bipolar, Voltage Output DAC AD5726 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 +5 V to ±15 V operation Unipolar or bipolar operation ±1 LSB maximum INL error, ±1 LSB maximum DNL error Guaranteed monotonic over temperature Double-buffered inputs Simultaneous updating via LDAC Asynchronous CLR to zero scale/midscale Operating temperature range: −40°C to +125°C iCMOS® process technology1 APPLICATIONS Industrial automation Closed-loop servo control, process control Automotive test and measurement Programmable logic controllers GENERAL DESCRIPTION The AD5726 is a quad, 12-bit, serial input, voltage output digital-to analog converter that offers guaranteed monotonicity and integral nonlinearity (INL) of ±1 LSB maximum. Output voltage swing is set by two reference inputs, VREFP and VREFN. The DAC offers a unipolar positive output range when the VREFN input is set to 0 V and the VREFP input is set to a positive voltage. A similar configuration with VREFP at 0 V and VREFN at a negative voltage provides a unipolar negative output range. Bipolar outputs are configured by connecting both VREFP and VREFN to nonzero voltages. This method of setting output voltage ranges has advantages over the bipolar offsetting methods because it is not dependent on internal and external resistors with different temperature coefficients. The AD5726 uses a serial interface that operates at clock rates up to 30 MHz and is compatible with DSP and microcontroller interface standards. Double buffering allows simultaneous updating of all DACs. The asynchronous CLR function clears all DAC registers to a user-selectable, zero-scale or midscale output. The AD5726 is available in 16-lead SSOP and 16-lead SOIC packages. It can be operated from a wide variety of supply and reference voltages with supplies ranging from single +5 V to ±15 V, and references ranging from +2.5 V to ±10 V. Power dissipation is less than 240 mW with ±15 V supplies and only 30 mW with a +5 V supply. Operation is specified over the temperature range of −40°C to +125°C. Table 1. Related Devices Part No. Description AD5725 Quad, 12-bit, parallel input, unipolar/bipolar, voltage output DAC. AD5724R/AD5734R/ AD5754R Complete, quad, 12-/14-/16-bit, serial input, unipolar/bipolar voltage output DAC with internal reference. AD5722R/AD5732R/ AD5752R Complete, dual, 12-/14-/16-bit, serial input, unipolar/bipolar voltage output DAC with internal reference. FUNCTIONAL BLOCK DIAGRAM DAC C DAC D DAC B DAC A GND AD5726 12 VOUTA 12 VOUTB 12 VOUTC 12 12 12 12 12 VOUTD CLRSEL 12 I/O REGISTER AND CONTROL LOGIC VREFP AVDD AVSS SDIN SCLK CS VREFN LDAC CLR INPUT REG A INPUT REG B INPUT REG C INPUT REG D DAC REG A DAC REG B DAC REG C DAC REG D Figure 1. 1 For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher-voltage levels, iCMOS is a technology platform that enables the development of analog ICs capable of 30 V and operating at ±15 V supplies while allowing dramatic reductions in power consumption and package size, and increased ac and dc performance. |
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