MP7226LS datasheet(11/16 Pages) EXAR

Numer części	MP7226LS

Szczegółowy opis	BiCMOS Fixed, Quad, Voltage Output, Single or Dual Supply 8-Bit Digital-to-Analog Converter

PDF	16 Pages

Scroll/Zoom	100%

Producent	EXAR [Exar Corporation]

Strona internetowa	http://www.exar.com

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11 / 16 page

MP7226

Rev. 2.00

–

Figure 7. Digitally Programmable Offset Adjustment Circuits

DAC

Output

VOFFSET

VOUT

VOUT = Dn X VREF + VOFFSET

where Dn is the digital input code

and can vary 0 to 255

–

DAC

Output1

VOUT

VOUT = Dn1 X VREF + Dn2 X VREF

where Dn is the digital input code and

can vary 0 to 255

DAC

Output2

VREF

VDD

VOUT

–5 V or GND

AGND

DAC

–

Figure 8. Digitally Programmable

AC Reference Input Signal Circuit (DC Couple)

–

Reference

Input

DAC

or DC Voltage

+15 V

VSS

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

(VDD = +5V ) or dual power supplies ( VDD = +5V and VSS =

–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.

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