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MAS DAC replaces trimmer

Posted: 05 Jun 2002 ?? ?Print Version ?Bookmark and Share

Keywords:mas9187? digital to analog converter? digital signal conversion? digital signal converter? analog signal converter?

The MAS9187 from Micro Analog Systems (MAS) Oy integrates 12 8-bit DACs into a TSSOP-20 package, and is positioned as a replacement for trimmers in dc voltage adjustment applications. The device is also suitable for use in high resolution monitors and automatic gain control applications.

The device operates from a single 2.7V source and is controlled via a three-wire serial data interface. The DAC is selected with four first bits of serial input data and the DAC output value is set according to the last 8 bits of serial input data.

To minimize current consumption, the MAS9187 can be powered down, since DAC outputs are stored in latches and are readily available after powering up the circuit.

The DAC is available in two versions: one with midscale preset (XRESET), which is used to force output to its midmost value, and another version that has the capability to set the output low reference voltage (VREFL), which is useful in pursuing maximum resolution with limited output voltage range.

Both versions have VREFH pin for adjusting the maximum output voltage.

Pricing for the MAS9187 starts at $4.29 for 1,000-unit quantities.





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