AD1580

Rev. F | Page 10 of 12

The AD1580 is ideal for creating the reference level to use with 12-bit

multiplying DACs, such as the AD7943, AD7945, and AD7948.

In the single-supply bias mode (see Figure 26), the impedance

of additional linearity error results. The buffer amp eliminates

any linearity degradation that could result from variations in

the reference level.

DAC

RBF

AGND

DGND

A1

C1

3.3V

41.2k

Ω

3.3V

AD1580

SIGNAL GROUND

A1: OP295

AD822

OP2283

A1

AD7943/

AD7945/

AD7948

Figure 26. Single-Supply System