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AD5311BRM Folha de dados(PDF) 1 Page - Analog Devices |
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AD5311BRM Folha de dados(HTML) 1 Page - Analog Devices |
1 / 15 page 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 AD5301/AD5311/AD5321* One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999 +2.5 V to +5.5 V, 120 A, 2-Wire Interface, Voltage Output 8-/10-/12-Bit DACs FUNCTIONAL BLOCK DIAGRAM RESISTOR NETWORK BUFFER VOUT DAC REGISTER POWER-DOWN LOGIC AD5301/AD5311/AD5321 VDD SCL A0 GND A1* REF POWER-ON RESET PD* SDA *AVAILABLE ON 8-LEAD VERSION ONLY 8-/10-/12-BIT DAC INTERFACE LOGIC FEATURES AD5301: Buffered Voltage Output 8-Bit DAC AD5311: Buffered Voltage Output 10-Bit DAC AD5321: Buffered Voltage Output 12-Bit DAC 6-Lead SOT-23 and 8-Lead SOIC Packages Micropower Operation: 120 A @ 3 V 2-Wire (I2C® Compatible) Serial Interface Data Readback Capability +2.5 V to +5.5 V Power Supply Guaranteed Monotonic By Design Over All Codes Power-Down to 50 nA @ 3 V Reference Derived from Power Supply Power-On-Reset to Zero Volts On-Chip Rail-to-Rail Output Buffer Amplifier Three Power-Down Functions APPLICATIONS Portable Battery Powered Instruments Digital Gain and Offset Adjustment Programmable Voltage and Current Sources Programmable Attenuators GENERAL DESCRIPTION The AD5301/AD5311/AD5321 are single 8-, 10- and 12-bit buffered voltage-output DACs that operate from a single +2.5 V to +5.5 V supply consuming 120 µA at 3 V. The on-chip output amplifier allows rail-to-rail output swing with a slew rate of 0.7 V/ µs. It uses a 2-wire (I2C compatible) serial interface that operates at clock rates up to 400 kHz. Multiple devices can share the same bus. The reference for the DAC is derived from the power supply inputs and thus gives the widest dynamic output range. These parts incorporate a power-on-reset circuit, which ensures that the DAC output powers-up to zero volts and remains there until a valid write takes place. The parts contain a power-down feature which reduces the current consumption of the device to 50 nA at 3 V and provides software-selectable output loads while in power-down mode. The low power consumption in normal operation make these DACs ideally suited to portable battery-operated equipment. The power consumption is 0.75 mW at 5 V, 0.36 mW at 3 V reducing to 1 µW in all power-down modes. I 2C is a registered trademark of Philips Corporation. *Protected by U.S. Patent No. 5684481, other patent pending. |
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