The AD5254BRUZ1 is a quad-channel non-volatile Digital Potentiometer performs the same electronic adjustment functions as mechanical potentiometers, trimmers and variable resistors. The parts versatile programmability allows multiple modes of operation, including read/write access in the RDAC and EEMEM registers, increment/decrement of resistance, resistance changes in ±6 dB scales, wiper setting readback and extra EEMEM for storing user-defined information, such as memory data for other components, look-up table or system identification information. The AD5254 allow the host I2C controllers to write any of the 256-step wiper settings in the RDAC registers and store them in the EEMEM. Once the settings are stored, they are restored automatically to the RDAC registers at system power-on; the settings can also be restored dynamically.
- Non-volatile memory stores wiper settings with write protection
- power-ON refreshed with EEMEM settings in 300μs typical
- Resistance tolerance stored in non-volatile memory
- 12 Extra bytes in EEMEM for user-defined information
- Direct read/write access of RDAC2 and EEMEM registers
- Predefined linear increment/decrement commands
- Synchronous or asynchronous quad-channel update
- 2 Slave address-decoding bits allow operation of 4 devices
信号处理, 传感与仪器
(EN)
