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AD5232 Folha de dados(PDF) 1 Page - Analog Devices |
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AD5232 Folha de dados(HTML) 1 Page - Analog Devices |
1 / 14 page PRELIMINARY TECHNICAL DATA a Nonvolatile Memory Digital Potentiometers AD5231/AD5232/AD5233 REV PrF, 22 MAR '01 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: 781/329-4700 World Wide Web Site: http://www.analog.com Fax:617/326-8703 © Analog Devices, Inc., 1999 FEATURES Nonvolatile Memory Preset Maintains Wiper Settings AD5231 Single, 1024 Position Resolution AD5232 Dual, 256 Position Resolution AD5233 Quad, 64 Position Resolution 10K, 50K, 100K Ohm Terminal Resistance Linear or Log taper Settings Increment/Decrement Commands, Push Button Command SPI Compatible Serial Data Input with Readback Function +3 to +5V Single Supply or ±2.5V Dual Supply Operation User EEMEM nonvolatile memory for constant storage APPLICATIONS Mechanical Potentiometer Replacement Instrumentation: Gain, Offset Adjustment Programmable Voltage to Current Conversion Programmable Filters, Delays, Time Constants Line Impedance Matching Power Supply Adjustment DIP Switch Setting GENERAL DESCRIPTION The AD5231/AD5232/AD5233 family provides a single- /dual-/quad-channel, digitally controlled variable resistor (VR) with resolutions of 1024/256/64 positions respectively. These devices perform the same electronic adjustment function as a potentiometer or variable resistor. The AD523X’s versatile programming via a Micro Controller allows multiple modes of operation and adjustment. In the direct program mode a predetermined setting of the RDAC register can be loaded directly from the micro controller. Another key mode of operation allows the RDAC register to be refreshed with the setting previously stored in the EEMEM register. When changes are made to the RDAC register to establish a new wiper position, the value of the setting can be saved into the EEMEM by executing an EEMEM save operation. Once the settings are saved in the EEMEM register these values will be transferred automatically to the RDAC register to set the wiper position at system power ON. Such operation is enabled by the internal preset strobe and the preset can also be accessed externally. The basic mode of adjustment is the increment and decrement command controlling the present setting of the Wiper position setting (RDAC) register. An internal scratch pad RDAC register can be moved UP or DOWN, one step of the nominal terminal resistance between terminals A-and-B. This linearly changes the wiper to B terminal resistance (RWB) by one position segment of the device's end-to-end resistance (RAB). For exponential/logarithmic changes in wiper setting, a left/right shift command adjusts levels in +/-6dB steps, which can be useful for sound and light alarm applications. The AD523X are available in the thin TSSOP package. All parts are guaranteed to operate over the extended industrial temperature range of -40°C to +85°C. FUNCTIONAL BLOCK DIAGRAMS RDA C1 RDA C1 R E GIST ER SER IA L IN T E R F A C E SD I SD O EEM E M 1 CS CL K SD I SD O V DD A 1 W 1 V SS WP AD 523 1 AD D R DE C O DE B 1 DIG IT A L OU T P U T BU F F ER DIG IT A L 2 R E GIST ER EEM E M 2 O 1 O 2 2 RDY GN D EEM E M CO NT RO L PR 28 B Y T E S U S E R EEM EM RD A C 1 RD A C 1 RE G IS T E R SE R IA L IN T E R F A C E SD I SD O E E ME M1 CS CL K SD I SD O V DD A 1 W 1 V SS WP A D 5232 A DDR DE CO DE B 1 RD A C 2 RD A C 2 RE G IS T E R E E ME M2 RD Y GN D EE M E M CO NT RO L A 2 W 2 B 2 PR 14 B Y T E S US E R E E M E M RD A C 1 RD A C 1 R E G IST ER SE R IA L IN T E R F A C E SD I SD O E E ME M1 CS CL K SD I SD O V DD A 1 W 1 WP A D 5233 A DDR DE CO DE B 1 RD A C 2 RD A C 2 R E G IST ER E E ME M2 RD Y GN D EE M E M CO NT RO L A 2 W 2 B 2 RD A C 3 RD A C 3 R E G IST ER E E ME M3 A 3 W 3 V SS B 3 RD A C 4 RD A C 4 R E G IST ER E E ME M4 A 4 W 4 B 4 DIG IT A L OU T P U T BU F F E R DIG IT A L 5 R E G IST ER E E ME M5 2 O 1 O 2 PR 11 B Y T E S US E R E E M E M |
Nº de peça semelhante - AD5232 |
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Descrição semelhante - AD5232 |
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