Overview
The AD5259BRMZ50, produced by Analog Devices Inc., is a nonvolatile, I2C-compatible digital potentiometer designed for 256-position adjustment applications. This device offers a compact solution in either LFCSP-10 (3 mm x 3 mm) or MSOP-10 (3 mm x 4.9 mm) packages. It functions as an electronic replacement for mechanical potentiometers or variable resistors, providing enhanced resolution and solid-state reliability.
The AD5259BRMZ50 features a digital interface that allows for the control of wiper settings and the reading of wiper register and EEPROM content. It includes a separate VLOGIC pin for increased interface flexibility and supports up to four devices on the same bus using Address Bits AD0 and AD1.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Number of Positions | - | - | - | 256 | - | - |
| End-to-End Resistance | RAB | - | - | 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | - | - |
| Resistance Tolerance | - | - | - | ±0.1% | - | - |
| Power Supply Range | VDD | - | 2.7 V | - | 5.5 V | V |
| Logic Supply Range | VLOGIC | - | 2.7 V | - | 5.5 V | V |
| Operating Temperature | TA | - | -40°C | - | 125°C | °C |
| Data Retention | - | - | - | 100 years (typical at 55°C) | - | - |
| Interface | - | - | - | I2C-compatible | - | - |
Key Features
- Nonvolatile memory to maintain wiper settings
- Compact LFCSP-10 (3 mm x 3 mm) or MSOP-10 (3 mm x 4.9 mm) packages
- I2C-compatible digital interface for wiper control and EEPROM access
- Separate VLOGIC pin for increased interface flexibility
- Address Decode Pins AD0 and AD1 allow up to four devices on the same bus
- Resistance tolerance stored in EEPROM with 0.1% accuracy
- Power-on EEPROM refresh time less than 1 ms
- Software write protect command for EEPROM
- Wide operating temperature range from -40°C to +125°C
- Single supply operation from 3 V to 5 V
Applications
- LCD panel VCOM adjustment and brightness/contrast control
- Replacement for mechanical potentiometers 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
Q & A
- What is the AD5259BRMZ50 used for?
The AD5259BRMZ50 is used as a digital potentiometer or variable resistor in applications requiring 256-position adjustment, such as LCD panel adjustments, programmable power supplies, and RF amplifier biasing.
- What are the package options for the AD5259BRMZ50?
The AD5259BRMZ50 is available in LFCSP-10 (3 mm x 3 mm) and MSOP-10 (3 mm x 4.9 mm) packages.
- What is the interface used for controlling the AD5259BRMZ50?
The AD5259BRMZ50 uses an I2C-compatible digital interface for controlling the wiper settings and accessing the EEPROM.
- How many devices can be connected on the same bus?
Up to four devices can be connected on the same bus using the Address Decode Pins AD0 and AD1.
- What is the accuracy of the resistance tolerance stored in EEPROM?
The resistance tolerance stored in EEPROM has an accuracy of 0.1%.
- What is the power-on EEPROM refresh time?
The power-on EEPROM refresh time is less than 1 ms.
- What is the operating temperature range of the AD5259BRMZ50?
The operating temperature range is from -40°C to +125°C.
- What is the typical data retention time at 55°C?
The typical data retention time at 55°C is 100 years.
- Does the AD5259BRMZ50 support software write protection?
Yes, the AD5259BRMZ50 supports a software write protect command for the EEPROM.
- What is the supply voltage range for the AD5259BRMZ50?
The supply voltage range is from 3 V to 5 V.
