NXP Semiconductors /LPC176x5x /DAC /CR

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Interpret as CR

31 2827 2423 2019 1615 1211 87 43 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0RESERVED0VALUE0 (FAST)BIAS 0RESERVED

BIAS=FAST

Description

D/A Converter Register. This register contains the digital value to be converted to analog and a power control bit.

Fields

RESERVED

Reserved. Read value is undefined, only zero should be written.

VALUE

After the selected settling time after this field is written with a new VALUE, the voltage on the DAC_OUT pin (with respect to VSSA) is VALUE x ((VREFP - V REFN)/1024) + VREFN.

BIAS

Settling time The settling times noted in the description of the BIAS bit are valid for a capacitance load on the DAC_OUT pin not exceeding 100 pF. A load impedance value greater than that value will cause settling time longer than the specified time. One or more graphs of load impedance vs. settling time will be included in the final data sheet.

0 (FAST): The settling time of the DAC is 1 us max, and the maximum current is 700 uA. This allows a maximum update rate of 1 MHz.

1 (SLOW): The settling time of the DAC is 2.5 us and the maximum current is 350 uA. This allows a maximum update rate of 400 kHz.

RESERVED

Reserved. Read value is undefined, only zero should be written.

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