MP7226

11

Rev. 2.00

–

+

Figure 7. Digitally Programmable Offset Adjustment Circuits

DAC

Output

and can vary 0 to 255

–

+

DAC

Output1

can vary 0 to 255

DAC

Output2

RR

R

R

RR

R

R

–5 V or GND

AGND

DAC

–

+

Figure 8. Digitally Programmable

AC Reference Input Signal Circuit (DC Couple)

–

+

AC

Reference

Input

DAC

or DC Voltage

+15 V

Offsetting DAC Outputs

Figure 7. shows examples of offset circuits.

DAC offset effects

When using the device in single supply applications, and

minimum reference voltage, there is a possibility that the DAC

output will not change when the code is incremented from 0.

Once the DAC has reached the offset voltage of the output

buffer, the DAC output will begin to increment in a normal opera-

tion.

5V Operation

The MP7226 can be operated with a single power supply

–5V) . The reference voltage range is reduced along with Some

performance parameter degradation. However the DNL of each

DAC remains at

1 LSB guaranteeing monotonicity.