DS1805 Rev 1 9/06 Addressable Digital Potentiometer General Description Features The DS1805 addressable digital potentiometer contains 3V or 5V Operation a single 256-position digitally controlled potentiometer. Low Power Consumption Device control is achieved through a 2-wire serial inter- face. Device addressing is provided through three One Digitally Controlled, 256-Position address inputs that allow up to eight devices on a sin- Potentiometer gle 2-wire bus. The exact wiper position of the poten- Compatible with DS1803-Based Designs tiometer can be written or read. The DS1805 is available in 16-pin SO and 14-pin TSSOP packages. 14-Pin TSSOP (173mil) and 16-Pin SO (150mil) The device is available in three standard resistance val- Available for Surface-Mount Applications ues: 10k , 50k , and 100k . The DS1805 is specified Three Address Inputs over the industrial temperature range. The DS1805 provides a low-cost alternative for designs based on Serial 2-Wire Bus the DS1803, but require only a single potentiometer. Operating Temperature Range Industrial: -40C to +85C Applications Standard Resistance Values CCFL Inverters DS1805-010: 10k PDAs and Cell Phones DS1805-050*: 50k Portable Electronics DS1805-100*: 100k Multimedia Products Instrumentation and Industrial Controls Ordering Information Pin Configurations RESISTANCE TOP VIEW PART TEMP RANGE PIN-P ACKAGE ( K ) DS1805E-010 -40C to +85C 14 TSSOP (173mil) 10 H1 H1 1 14 V 1 16 V CC CC DS1805E-050* -40C to +85C 14 TSSOP (173mil) 50 L1 2 13 N.C. N.C. 2 15 N.C. DS1805E-100* -40C to +85C 14 TSSOP (173mil) 100 W1 3 12 N.C. L1 3 14 N.C. DS1805Z-010 -40C to +85C 16 SO (150mil) 10 W1 4 DS1805Z 13 N.C. A2 4 11 N.C. DS1805E DS1805Z-050* -40C to +85C 16 SO (150mil) 50 A2 5 12 N.C. A1 5 10 N.C. DS1805Z-100* -40C to +85C 16 SO (150mil) 100 A0 6 9 SDA A1 6 11 N.C. Add /T&R for tape-and-reel orders. GND 7 8 SCL A0 7 10 SDA *Future product. GND 8 9 SCL 14 TSSOP (173mil) 16 SO (150mil) Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Addressable Digital Potentiometer ABSOLUTE MAXIMUM RATINGS Voltage on Any Pin Relative to Ground .................-0.5V to +6.0V Storage Temperature Range .............................-55C to +125C Operating Temperature Range ...........................-40C to +85C Soldering Temperature............................................See IPC/JEDEC J-STD-020A Specification Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED DC OPERATING CONDITIONS (T = -40C to +85C) A CONDITIONS PARAMETER SYMBOL MIN TYP MAX UNITS (Note 1) Supply Voltage V 2.7 5.5 V CC V + CC Resistor Inputs L, H, W (Note 1) -0.3 V 0.3 DC ELECTRICAL CHARACTERISTICS (V = 2.7V to 5.5V, T = -40C to +85C.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current Active I (Note 2) 200 A CC Input Leakage I -1 +1 A IL Wiper Resistance R 400 1000 W Wiper Current I 1mA W V + CC Input Logic 1 V 0.7V V IH CC 0.3 GND - Input Logic 0 V 0.3V V IL CC 0.3 V + CC Input logic 1 0.7V CC 0.3 Input Logic Levels A0, A1, A2 V (Note 3) GND - Input logic 0 0 . 2 5 V C C 0.3 Input Current each I/O Pin 0.4V < V < 0.9V -10 +10 A I/O CC (Note 4) Standby Current I (Note 5) 20 40 A STBY V 3mA sink current 0 0.4 V OL1 Low-Level Output Voltage V 6mA sink current 0 0.6 V OL2 I/O Capacitance C 10 pF I/0 Pulse Width of Spikes that Must t Fast mode 0 50 ns SP be Suppressed by the Input Filter 2 DS1805