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AD7391 Datasheet(PDF) 1 Page - Analog Devices |
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AD7391 Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page REV. A 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 that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD7390/AD7391 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2002 3 V Serial-Input Micropower 10-Bit and 12-Bit DACs FUNCTIONAL BLOCK DIAGRAM EN AD7390 DAC REGISTER 12-BIT DAC 12 12 SERIAL REGISTER REF VDD CLR LD CLK SDI GND VOUT FEATURES Micropower—100 A Single-Supply—2.7 V to 5.5 V Operation Compact 1.75 mm Height SO-8 Package and 1.1 mm Height TSSOP-8 Package AD7390—12-Bit Resolution AD7391—10-Bit Resolution SPI and 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 and 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 reference 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, 3-wire, SPI and microcontroller compatible inputs using data in (SDI), clock (CLK) and load strobe ( LD) pins. Addition- ally, 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 without 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 VDD = 3.0V TA = 55 C, +25 C, +85 C SUPERIMPOSED Figure 1. Differential Nonlinearity Error vs. Code AD7390 VDD = 3.0V VREF = 2.5V +25 C, +85 C 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 55 C Figure 2. INL Error vs. Code and Temperature |
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