Datasheet AD5227 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 64-Position Up/Down Control Digital Potentiometer |
| 页数 / 页 | 16 / 5 — AD5227. ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Rating. ESD CAUTION |
| 修订版 | B |
| 文件格式/大小 | PDF / 387 Kb |
| 文件语言 | 英语 |
AD5227. ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Rating. ESD CAUTION
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AD5227 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Rating
V DD to GND −0.3 V, +7 V VA, VB, VW to GND 0 V, VDD Digital Input Voltage to GND (CS, CLK, U/D) 0 V, VDD Maximum Current IWB, IWA Pulsed ±20 mA I Stresses above those listed under Absolute Maximum Ratings WB Continuous (RWB ≤ 5 kΩ, A open) 1 ±1 mA I may cause permanent damage to the device. This is a stress WA Continuous (RWA ≤ 5 kΩ, B open)1 ±1 mA I rating only and functional operation of the device at these or AB Continuous ±500 μA/ (RAB = 10 kΩ/50 kΩ/100 kΩ)1 ±100 μA/±50 μA any other conditions above those indicated in the operational Operating Temperature Range −40°C to +105°C section of this specification is not implied. Exposure to absolute Maximum Junction Temperature (TJmax) 150°C maximum rating conditions for extended periods may affect Storage Temperature −65°C to +150°C device reliability. Lead Temperature (Soldering, 10 s – 30 s) 245°C Thermal Resistance2 θJA 230°C/W 1 Maximum terminal current is bounded by the maximum applied voltage across any two of the A, B, and W terminals at a given resistance, the maximum current handling of the switches, and the maximum power dissipation of the package. VDD = 5 V. 2 Package power dissipation = (TJmax – TA) / θJA.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. B | Page 5 of 16 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY ELECTRICAL CHARACTERISTICS INTERFACE TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION PROGRAMMING THE DIGITAL POTENTIOMETERS Rheostat Operation Potentiometer Mode Operation DIGITAL INTERFACE TERMINAL VOLTAGE OPERATION RANGE POWER-UP AND POWER-DOWN SEQUENCES LAYOUT AND POWER SUPPLY BIASING APPLICATIONS MANUAL CONTROL WITH TOGGLE AND PUSHBUTTON SWITCHES MANUAL CONTROL WITH ROTARY ENCODER ADJUSTABLE LED DRIVER ADJUSTABLE CURRENT SOURCE FOR LED DRIVER ADJUSTABLE HIGH POWER LED DRIVER AUTOMATIC LCD PANEL BACKLIGHT CONTROL 6-BIT CONTROLLER CONSTANT BIAS WITH SUPPLY TO RETAIN RESISTANCE SETTING OUTLINE DIMENSIONS ORDERING GUIDE
AD5227 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Rating
V DD to GND −0.3 V, +7 V VA, VB, VW to GND 0 V, VDD Digital Input Voltage to GND (CS, CLK, U/D) 0 V, VDD Maximum Current IWB, IWA Pulsed ±20 mA I Stresses above those listed under Absolute Maximum Ratings WB Continuous (RWB ≤ 5 kΩ, A open) 1 ±1 mA I may cause permanent damage to the device. This is a stress WA Continuous (RWA ≤ 5 kΩ, B open)1 ±1 mA I rating only and functional operation of the device at these or AB Continuous ±500 μA/ (RAB = 10 kΩ/50 kΩ/100 kΩ)1 ±100 μA/±50 μA any other conditions above those indicated in the operational Operating Temperature Range −40°C to +105°C section of this specification is not implied. Exposure to absolute Maximum Junction Temperature (TJmax) 150°C maximum rating conditions for extended periods may affect Storage Temperature −65°C to +150°C device reliability. Lead Temperature (Soldering, 10 s – 30 s) 245°C Thermal Resistance2 θJA 230°C/W 1 Maximum terminal current is bounded by the maximum applied voltage across any two of the A, B, and W terminals at a given resistance, the maximum current handling of the switches, and the maximum power dissipation of the package. VDD = 5 V. 2 Package power dissipation = (TJmax – TA) / θJA.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. B | Page 5 of 16 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY ELECTRICAL CHARACTERISTICS INTERFACE TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION PROGRAMMING THE DIGITAL POTENTIOMETERS Rheostat Operation Potentiometer Mode Operation DIGITAL INTERFACE TERMINAL VOLTAGE OPERATION RANGE POWER-UP AND POWER-DOWN SEQUENCES LAYOUT AND POWER SUPPLY BIASING APPLICATIONS MANUAL CONTROL WITH TOGGLE AND PUSHBUTTON SWITCHES MANUAL CONTROL WITH ROTARY ENCODER ADJUSTABLE LED DRIVER ADJUSTABLE CURRENT SOURCE FOR LED DRIVER ADJUSTABLE HIGH POWER LED DRIVER AUTOMATIC LCD PANEL BACKLIGHT CONTROL 6-BIT CONTROLLER CONSTANT BIAS WITH SUPPLY TO RETAIN RESISTANCE SETTING OUTLINE DIMENSIONS ORDERING GUIDE