AD5259 Datasheet

• Nonvolatile memory maintains wiper settings
• 256-position
• Thin LFCSP-10 (3 mm x 3 mm x 0.8 mm) package
• Compact MSOP-10 (3 mm × 4.9 mm × 1.1 mm) package
• I²C-compatible interface
• V_LOGIC pin provides increased interface flexibility
• End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
• Resistance tolerance stored in EEPROM (0.1% accuracy)
• Power-on EEPROM refresh time < 1ms
• Software write protect command
• Address Decode Pin AD0 and Pin AD1 allow 4 packages per bus
• 100-year typical data retention at 55°C
• Wide operating temperature −40°C to +125°C
• 3 V to 5 V single supply

• LCD panel V_COM adjustment
• LCD panel brightness and contrast control
• Mechanical potentiometer replacement in new designs
• Programmable power supplies
• RF amplifier biasing
• Automotive electronics adjustment
• Gain control and offset adjustment
• Fiber to the home systems
• Electronics level settings

The AD5259 provides a compact, nonvolatile LFCSP-10 (3 mm x 3 mm) or MSOP-10 (3 mm x 4.9 mm) packaged solution for 256-position adjustment applications. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors, but with enhanced resolution and solid-state reliability. The terms digital potentiometer, VR (variable resistor), and RDAC are used interchangeably.

The wiper settings are controllable through an I²C-compatible digital interface that is also used to read back the wiper register and EEPROM content. Resistor tolerance is also stored within EEPROM, providing an end-to-end tolerance accuracy of 0.1%.

A separate V_LOGIC pin delivers increased interface flexibility. For users who need multiple parts on one bus, Address Bit AD0 and Address Bit AD1 allow up to four devices on the same bus.