Файл:AD7545.pdf
 Размер этого JPG-превью для исходного PDF-файла: 1280 × 1656 пикселей. Другие разрешения: 320 × 414 пикселей | 800 × 1035 пикселей | 2550 × 3300 пикселей. a CMOS 12-Bit Buffered Multiplying DAC AD7545 FEATURES 12-Bit Resolution Low Gain TC: 2 ppm/؇C typ Fast TTL Compatible Data Latches Single +5 V to +15 V Supply Small 20-Lead 0.3" DIP and 20-Terminal Surface Mount Packages Latch Free (Schottky Protection Diode Not Required) Low Cost Ideal for Battery Operated Equipment FUNCTIONAL BLOCK DIAGRAM RFB 20 AD7545 VREF 19 1 OUT 1 2 12-BIT MULTIPLYING DAC AGND 12 WR 17 CS 16 GENERAL DESCRIPTION R RY NA AL I IM IC EL HN PR EC TA T DA 18 VDD INPUT DATA LATCHES 3 DGND 12 DB11–DB0 (PINS 4–15) The AD7545 is particularly suitable for single supply operation and applications with wide temperature variations. The AD7545 is a monolithic 12-bit CMOS multiplying DAC with onboard data latches. It is loaded by a single 12-bit wide word and directly interfaces to most 12- and 16-bit bus systems. Data is loaded into the input latches under the control of the CS and WR inputs; tying these control inputs low makes the input latches transparent, allowing direct unbuffered operation of the DAC. The AD7545 can be used with any supply voltage from +5 V to +15 V. With CMOS logic levels at the inputs the device dissipates less than 0.5 mW for VDD = +5 V. PIN CONFIGURATIONS DB11 (MSB) 4 18 VDD 16 CS DB10 5 AD7545 17 WR DB10 5 DB9 6 TOP VIEW (Not to Scale) 16 CS DB9 6 15 DB0 (LSB) DB8 7 1 20 19 DB10 5 DB9 6 DB8 7 AD7545 TOP VIEW 15 DB0 (MSB) (Not to Scale) 14 DB1 16 CS 15 DB0 (LSB) DB7 8 14 DB1 DB2 DB3 DB4 10 11 12 13 DB5 DB6 DB2 9 DB3 9 10 11 12 13 DB4 11 DB4 18 VDD 17 WR AD7545 TOP VIEW (Not to Scale) DB6 12 DB3 DB5 10 PIN 1 IDENTIFIER DB11 (MSB) 4 13 DB2 DB6 9 14 DB1 DB7 8 DB5 DB7 8 DB8 7 VREF 17 WR 2 18 VDD DB11 (MSB) 4 RFB 19 VREF DGND 3 RFB 20 RFB AGND 2 AGND 3 1 20 19 OUT 1 1 OUT 1 2 DGND 3 PLCC VREF AGND OUT 1 LCCC DGND DIP 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997
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