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AD8582AR датащи(PDF) 1 Page - Analog Devices |
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AD8582AR датащи(HTML) 1 Page - Analog Devices |
1 / 8 page AD8582 One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 a FUNCTIONAL BLOCK DIAGRAM 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. The high speed parallel data interface connects to the fastest processors without wait states. The double-buffered input struc- ture allows the user to load the input registers one at a time, then a single load strobe tied to both LDA + LDB inputs will update both DAC outputs simultaneously. LDA and LDB can also be activated independently to immediately update their re- spective DAC registers. An address input decodes DAC A or DAC B when the chip select CS input is strobed. An asynchro- nous reset input sets the output to zero scale. The MSB bit can be used to establish a preset to midscale when the reset input is strobed. The AD8582 is available in the 24-pin plastic DIP and the sur- face mount SOIC-24. Each part is fully specified for operation over –40 °C to +85°C, and the full +5 V ± 5% power supply range. FEATURES Complete Dual 12-Bit DAC No External Components Single +5 Volt Operation 1 mV/Bit with 4.095 V Full Scale True Voltage Output, ±5 mA Drive Very Low Power: 5 mW APPLICATIONS Digitally Controlled Calibration Portable Equipment Servo Controls Process Control Equipment PC Peripherals +5 Volt, Parallel Input Complete Dual 12-Bit DAC GENERAL DESCRIPTION The AD8582 is a complete, parallel input, dual 12-bit, voltage output DAC designed to operate from a single +5 volt supply. Built using a CBCMOS process, this monolithic DAC offers the user low cost, and ease-of-use in +5 volt only systems. Included on the chip, in addition to the DACs, are a rail-to-rail amplifier, latch and reference. The reference (VREF) is trimmed to 2.5 volts output, and the on-chip amplifier gains up the DAC output to 4.095 volts full scale. The user needs only supply a +5 volt supply. The AD8582 is coded natural binary. The op amp output swings from 0 volt to +4.095 volts for a one-millivolt-per-bit resolution, and is capable of driving ±5 mA. Operation down to 4.3 V is possible with output load currents less than 1 mA. DATA REFERENCE 12-BIT DAC A DAC A REGISTER INPUT A REGISTER 12-BIT DAC B DAC B REGISTER INPUT B REGISTER 12 12 2 12 VDD VOUTA VOUTB VREF AGND DGND MSB RST LDA CS A/B LDB AD8582 OUTPUT LOAD CURRENT – mA 5.0 4.4 4.0 0.01 0.1 100 10 1.0 4.2 4.6 4.8 ∆∆VFS ≤ 1 LSB DATA = FFFH TA = +25°C PROPER OPERATION WHEN VDD SUPPLY VOLTAGE ABOVE CURVE Figure 1. Minimum Supply Voltage vs. Load 2.0 –2.0 4096 –1.0 –1.5 0 0.0 –0.5 0.5 1.0 1.5 3072 2048 1024 DIGITAL INPUT CODE – Decimal V DD = +5V T A = –55°C, +25°C, +85°C = +25°C & +85°C = –55°C Figure 2. Linearity Error vs. Digital Code and Temperature |
Аналогичный номер детали - AD8582AR |
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Аналогичное описание - AD8582AR |
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