11 Automatic Transfer

The 12-bit DAC word is automatically transferred to the DAC register and the R-2R ladder when the second write (the 4 LSBs of

the data) occurs

TLH5690 – 7

12 Independent Processor Transfer Control

In this case a separate address is decoded to provide the XFER signal This allows the processor to load the next required DAC

word but not change the analog output until some time later most useful for the simultaneous updating of several DACs in a

system where their XFER lines would be tied together

TLH5690 – 8

13 Transfer via an External Strobe

This method is basically the same as the previous operation except the XFER signal is provided by a device other than the

processor This allows the DAC to hold the code for a conditional analog output signal which will be required on demand from an

external monitoring device (an analog voltage comparator for instance)

WR2 tied to a logic low (0V)

TLH5690 – 9

7