Industry's Only Temperature-Compensated Resistor Optimized for APD Biasing in Fiber Optic Modules
Note to Editor:
- The DS1841 is a 128-position digital resistor with an on-chip temperature sensor, ADC, and EEPROM lookup table.
- This device achieves a greater level of control and precision than current solutions, which tend to provide fine control at low voltages but poor control at critical high voltages.
- To enable this performance, the digital resistor provides nonlinear step sizes between positions to ensure a linear voltage output response when used with a DC-DC converter.
- The DS1841 is ideal for fiber optic modules that require a temperature-controlled voltage output.
| | |
SUNNYVALE, CA—February 7, 2008—Maxim Integrated Products (Pink Sheets: MXIM) introduces the DS1841 temperature-compensated resistor 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 analog-to-digital converter (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. Both the temperature and supply voltage can be read on the I²C bus for other control/monitoring purposes. The robust, predictable operation of the DS1841 makes it ideal for use in fiber optic modules that require a temperature-controlled voltage output.
The DS1841 is fully specified over the -40°C to +100°C operating temperature range, and is packaged in a tiny, 3mm x 3mm, 10-pin TDFN. Pricing begins at $0.68 (10,000-up, FOB USA).
Maxim Integrated Products, a two billion dollar company, designs and manufactures ICs for analog and mixed-signal applications. The company's broad portfolio of 27 product lines is among the industry's deepest, with over 5400 products.
|
