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AD8303AR Datasheet(PDF) 1 Page - Analog Devices |
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AD8303AR Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page FUNCTIONAL BLOCK DIAGRAM D A C A R E G I S T E R D PR En S H I F T R E G I S T E R D A C B R E G I S T E R D PR R E F E R E N C E B A N D G A P DAC A DAC B VDD REF BUF REF BUF AD8303 VOUTA VREF VOUTB CS CLK SDI (DATA) LDA LDB DGND MSB RS AGND SHDN OP AMP A OP AMP B 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 V, Dual, Serial Input Complete 12-Bit DAC AD8303 © 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 FEATURES Complete Dual 12-Bit DAC Pretrimmed Internal Voltage Reference Single +3 V Operation 0.5 mV/Bit with 2.0475 V Full Scale Low Power: 9.6 mW 3-Wire Serial SPI Compatible Interface Power Shutdown IDD < 1 A Compact SO-14, 1.75 mm Height Package APPLICATIONS Portable Communications Digitally Controlled Calibration Servo Controls PC Peripherals GENERAL DESCRIPTION The AD8303 is a complete (includes internal reference) dual, 12-bit, voltage output digital-to-analog converter designed to operate from a single +3 volt supply. Built using a CBCMOS process, this monolithic DAC offers the user low cost and ease- of-use in single-supply +3 volt systems. Operation is guaranteed over the supply voltage range of +2.7 V to +5.5 V making this device ideal for battery operated applications. The 2.0475 V full-scale voltage output is laser-trimmed to maintain accuracy over the operating temperature range of the device. The binary input data format provides an easy-to-use one-half millivolt-per-bit software programmability. The voltage outputs are capable of sourcing 3 mA. DIGITAL INPUT CODE – Decimal 1.0 –1.0 0 4096 1024 2048 3072 0.8 0.2 0 –0.4 –0.8 0.6 0.4 –0.2 –0.6 VDD = +5V TA = –40°C, +25°C, +85°C Figure 1. Differential Nonlinearity Error vs. Code A double buffered serial data interface offers high speed, three- wire, DSP and SPI microcontroller compatible inputs using data in (SDI), clock (CLK) and load strobe (LDA + LDB) pins. A chip-select (CS) pin simplifies connection of multiple DAC packages by enabling the clock input when active low. Additionally, an RS input sets the output to zero scale or to 1/2 scale based on the level applied to the MSB pin. A power shutdown feature reduces power dissipation to less than 3 µW. The AD8303 is specified over the extended industrial (–40 °C to +85 °C) temperature range. AD8303s are available in plastic DIP and low profile 1.75 mm height SO-14 surface mount packages. For single-channel DAC applications, see the AD8300 which is offered in the 8-lead DIP and SO-8 packages. DIGITAL INPUT CODE – Decimal 2 –2 1.5 0 –0.5 –1 –1.5 1 0.5 VDD = +5V 0 1024 2048 3072 4096 +25 °C +85 °C –40 °C Figure 2. Linearity Error vs. Digital Code and Temperature |
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