The DS1841 temperature-compensated resistor is optimized for avalanche photodiode (APD) voltage control. This I2C-controlled, 128-position digital resistor utilizes a logarithmic scale specifically designed to linearize the control of APD voltages in fiber optic modules. Every 2* C, an internal temperature sensor and ADC update the digital resistor's wiper position based on the temperature and the value corresponding to that temperature in its on-chip, 72-byte EEPROM lookup table.
Maxim Integrated Products, www.maxim-ic.com
