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AD7237ABN bảng dữ liệu(PDF) 1 Page - Analog Devices |
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AD7237ABN bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 12 page FUNCTIONAL BLOCK DIAGRAMS 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 LC2MOS Dual 12-Bit DACPORTs AD7237A/AD7247A FEATURES Complete Dual 12-Bit DAC Comprising Two 12-Bit CMOS DACs On-Chip Voltage Reference Output Amplifiers Reference Buffer Amplifiers Improved AD7237/AD7247: 12 V to 15 V Operation Faster Interface –30 ns typ Data Setup Time Parallel Loading Structure: AD7247A (8+4) Loading Structure: AD7237A Single or Dual Supply Operation Low Power—165 mW typ in Single Supply One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 PRODUCT HIGHLIGHTS 1. The AD7237A/AD7247A is a dual 12-bit DACPORT ® on a single chip. This single chip design and small package size offer considerable space saving and increased reliability over multichip designs. 2. The improved interface times of the parts allow easy, direct interfacing to most modern microprocessors, whether they have 8-bit or 16-bit data bus structures. 3. The AD7237A/AD7247A features a wide power supply range allowing operation from 12 V supplies. DACPORT is a registered trademark of Analog Devices, Inc. GENERAL DESCRIPTION The AD7237A/AD7247A is an enhanced version of the industry standard AD7237/AD7247. Improvements include operation from 12 V to 15 V supplies, faster interface times and better reference variations with VDD. Additional features include faster settling times. The AD7237A/AD7247A is a complete, dual, 12-bit, voltage output digital-to-analog converter with output amplifiers and Zener voltage reference on a monolithic CMOS chip. No exter- nal user trims are required to achieve full specified performance. Both parts are microprocessor compatible, with high speed data latches and interface logic. The AD7247A accepts 12-bit paral- lel data which is loaded into the respective DAC latch using the WR input and a separate Chip Select input for each DAC. The AD7237A has a double buffered interface structure and an 8-bit wide data bus with data loaded to the respective input latch in two write operations. An asynchronous LDAC signal on the AD7237A updates the DAC latches and analog outputs. A REF OUT/REF IN function is provided which allows either the on-chip 5 V reference or an external reference to be used as a reference voltage for the part. For single supply operation, two output ranges of 0 V to +5 V and 0 V to +10 V are available, while these two ranges plus an additional ±5 V range are avail- able with dual supplies. The output amplifiers are capable of de- veloping +10 V across a 2 k Ω load to GND. The AD7237A/AD7247A is fabricated in Linear Compatible CMOS (LC 2MOS), an advanced, mixed technology process that combines precision bipolar circuits with low power CMOS logic. Both parts are available in a 24-pin, 0.3" wide plastic and hermetic dual-in-line package (DIP) and are also packaged in a 24-lead small outline (SOIC) package. |
Số phần tương tự - AD7237ABN |
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Mô tả tương tự - AD7237ABN |
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