Analogue, Mixed Signal, LSI


7-bit high-voltage pot with temperature sensor

16 May 2007 Analogue, Mixed Signal, LSI

Dallas Semiconductor's DS3501 is a 7-bit nonvolatile digital potentiometer (digipot) that features an output voltage of up to 15,5 V. According to the manufacturer, this device is the first in a series of highly integrated nonvolatile digipots to incorporate temperature sensing, an ADC, and a lookup table (LUT) at approximately the same cost as a standard digipot. The DS3501 provides an ADC-addressable 36-bin LUT spanning a temperature range of -40 to 100°C. The LUT output can be added to a nonvolatile initial value register (IVR) or can simply replace the IVR to define the input to a 7-bit linear r-string digipot. This structure supports a wide variety of applications such as LCD panels, optical transceivers, and industrial control where the ideal control voltage changes with temperature. As a voltage change can be linear or nonlinear with temperature, the DS3501 is designed to handle both cases. Programming is through an I²C-compatible interface that can operate up to 400 kHz. The DS3501 is available in 10-pin microSOP package.

CST Electronics, +27 (0)11 608 0070

Electrocomp, +27 (0)11 458 9000



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