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AD5203AN10 データシート(PDF) 1 Page - Analog Devices |
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AD5203AN10 データシート(HTML) 1 Page - Analog Devices |
1 / 12 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 AD5203 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., 1998 4-Channel, 64-Position Digital Potentiometer FUNCTIONAL BLOCK DIAGRAM SHDN DAC 1 A1 W1 B1 AGND1 6 VDD DGND SDI CLK CS AD5203 SDO SHDN A2 W2 B2 AGND2 A3 W3 B3 AGND3 A4 W4 B4 AGND4 6 2 RS 6-BIT LATCH CK RS 6 6-BIT LATCH CK RS SHDN DAC 2 SHDN DAC 3 6 6 SHDN DAC 4 6-BIT LATCH CK RS 6-BIT LATCH CK RS DAC SELECT A1, A0 1 2 3 4 8-BIT SERIAL LATCH D CK Q RS FEATURES 64 Position Replaces Four Potentiometers 10 k , 100 k Power Shutdown—Less than 5 A 3-Wire SPI-Compatible Serial Data Input 10 MHz Update Data Loading Rate +2.7 V to +5.5 V Single Supply Operation Midscale Preset APPLICATIONS Mechanical Potentiometer Replacement Programmable Filters, Delays, Time Constants Volume Control, Panning Line Impedance Matching Power Supply Adjustment GENERAL DESCRIPTION The AD5203 provides a quad channel, 64-position digitally- controlled variable resistor (VR) device. These parts perform the same electronic adjustment function as a potentiometer or vari- able resistor. The AD5203 contains four independent variable resistors in a 24-lead SOIC and the compact TSSOP-24 pack- ages. Each part contains a fixed resistor with a wiper contact that taps the fixed resistor value at a point determined by a digi- tal code loaded into the controlling serial input register. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the VR latch. Each variable resistor offers a completely programmable value of resistance, between the A terminal and the wiper or the B terminal and the wiper. The fixed A-to-B terminal resistance of 10 k Ω, or 100 kΩ has a ±1% channel-to- channel matching tolerance with a nominal temperature coeffi- cient of 700 ppm/ °C. Each VR has its own VR latch which holds its programmed resistance value. These VR latches are updated from an internal serial-to-parallel shift register that is loaded from a standard 3-wire serial-input digital interface. Eight data bits make up the data word clocked into the serial input register. The data word is decoded where the first two bits determine the address of the VR latch to be loaded, the last 6-bits are data. A serial data output pin at the opposite end of the serial register allows simple daisy- chaining in multiple VR applications without additional external decoding logic. The reset RS pin forces the wiper to the midscale position by loading 20H into the VR latch. The SHDN pin forces the resis- tor to an end-to-end open circuit condition on terminal A and shorts the wiper to terminal B, achieving a microwatt power shutdown state. When shutdown is returned to logic-high the previous latch settings put the wiper in the same resistance set- ting prior to shutdown. The AD5203 is available in a narrow body P-DIP-24, the 24-lead surface mount package, and the compact 1.1 mm thin TSSOP-24 package. All parts are guaranteed to operate over the extended industrial temperature range of –40 °C to +85°C. For pin compatible higher resolution applications, see the 256- position AD8403 product. |
同様の部品番号 - AD5203AN10 |
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同様の説明 - AD5203AN10 |
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