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AD5425 Datasheet(PDF) 1 Page - Analog Devices |
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AD5425 Datasheet(HTML) 1 Page - Analog Devices |
1 / 25 page 8-Bit, High Bandwidth Multiplying DAC with Serial Interface Data Sheet AD5425 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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 ©2004–2012 Analog Devices, Inc. All rights reserved. FEATURES 2.5 V to 5.5 V supply operation 50 MHz serial interface 2.47 MSPS update rate INL of ±0.25 LSB 10 MHz multiplying bandwidth ±10 V reference input Low glitch energy: <2 nV-s Extended temperature range: −40°C to +125°C 10-lead MSOP package Guaranteed monotonic 4-quadrant multiplication Power-on reset with brownout detection LDAC function 0.4 µA typical power consumption APPLICATIONS Portable battery-powered applications Waveform generators Analog processing Instrumentation applications Programmable amplifiers and attenuators Digitally controlled calibration Programmable filters and oscillators Composite video Ultrasound Gain, offset, and voltage trimming GENERAL DESCRIPTION The AD54251 is a CMOS, 8-bit, current output digital-to-analog converter that operates from a 2.5 V to 5.5 V power supply, making it suitable for battery-powered applications and many other applications. This DAC utilizes a double buffered, 3-wire serial interface that is compatible with SPI ®, QSPI™, MICROWIRE™, and most DSP interface standards. An LDAC pin is also provided, which allows simultaneous updates in a multi-DAC configuration. On power-up, the internal shift register and latches are filled with 0s and the DAC outputs are 0 V. As a result of manufacturing on a CMOS submicron process, this DAC offers excellent 4-quadrant multiplication charac- teristics with large signal multiplying bandwidths of 10 MHz. The applied external reference input voltage (VREF) determines the full-scale output current. An integrated feedback resistor, RFB, provides temperature tracking and full-scale voltage output when combined with an external I-to-V precision amplifier. The AD5425 is available in a small, 10-lead MSOP package. FUNCTIONAL BLOCK DIAGRAM Figure 1. 1 U.S. Patent No. 5,969,657. SCLK SYNC AD5425 VREF IOUT2 IOUT1 RFB R 8-BIT R-2R DAC DAC REGISTER SDIN VDD GND POWER-ON RESET LDAC CONTROL LOGIC AND INPUT SHIFT REGISTER INPUT LATCH |
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