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AD7390AN Datenblatt(PDF) 1 Page - Analog Devices |
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AD7390AN Datenblatt(HTML) 1 Page - Analog Devices |
1 / 12 page FUNCTIONAL DIAGRAM REF 12-BIT DAC DAC REGISTER SERIAL REGISTER 12 CLR CLK SDI VDD VOUT GND 12 EN LD AD7390 REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a +3 Volt Serial-Input Micropower 10-Bit & 12-Bit DACs FEATURES Micropower—100 A Single-Supply— 2.7 to 5.5 V Operation Compact 1.75 mm Height SO-8 Package & 1.1 mm Height TSSOP-8 AD7390—12-Bit Resolution AD7391—10-Bit Resolution SPI & QSPI Serial Interface Compatible with Schmitt Trigger Inputs APPLICATIONS Automotive 0.5 V to 4.5 V Output Span Voltage Portable Communications Digitally Controlled Calibration GENERAL DESCRIPTION The AD7390/AD7391 family of 10-bit & 12-bit voltage-output digital-to-analog converters is designed to operate from a single 3 V supply. Built using a CBCMOS process, these monolithic DACs offer the user low cost, and ease-of-use in single-supply 3 V systems. Operation is guaranteed over the supply voltage range of 2.7 V to 5.5 V consuming less than 100 µA making this device ideal for battery operated applications. The full-scale voltage output is determined by the external ref- erence input voltage applied. The rail-to-rail REFIN to DACOUT allows for a full-scale voltage set equal to the positive supply VDD or any value in between. A doubled-buffered serial-data interface offers high speed, three-wire, SPI and microcontroller compatible inputs using data in (SDI), clock (CLK) and load strobe (LD) pins. Addi- tionally, a CLR input sets the output to zero scale at power on or upon user demand. Both parts are offered in the same pinout to allow users to select the amount of resolution appropriate for their application with- out circuit card redesign. The AD7390/AD7391 are specified over the extended industrial ( 40 °C to 85°C) temperature range. The AD7391AR is specified for the 40 °C to 125°C automotive temperature range. The AD7390/AD7391s are available in plastic DIP, and low profile 1.75 mm height SO-8 surface mount packages. The AD7391ARU is available for ultracompact applications in a thin 1.1 mm TSSOP-8 package. CODE – Decimal 1.00 1.00 0 4096 512 1024 1536 2048 2560 3072 3584 0.75 0.00 0.25 0.50 0.75 0.50 0.25 AD7390 TA = 55 C, 25 C, 85 C SUPERIMPOSED VDD = +3.0V Figure 1. Differential Nonlinearity Error vs. Code AD7390 VDD = +3.0V VREF = +2.5V 25 , 85 C 55 CODE – Decimal 0 4096 512 1024 1536 2048 2560 3072 2584 2.0 2.0 1.5 0.0 0.5 1.0 1.5 1.0 0.5 Figure 2. INL Error vs. Code & Temperature AD7390/AD7391 © Analog Devices, Inc., 1996 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 |
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