Patent ID: 7522083

Claim:
A semiconductor integrated circuit device comprising: a signal line; a segment D/A conversion portion having plural current source circuits; first to third R 2 R D/A conversion portions each having plural current source circuits and an R 2 R ladder portion including a plurality of first resistors and a plurality second resistors, each of the plurality of second resistors having a resistance value two times as large as a resistance value of each of the plurality of first resistors; and a trimming portion including the second and third R 2 R D/A conversion portions; wherein the segment D/A conversion portion applies a first current, corresponding to a number of the plural current source circuits which is determined by a first signal, to the signal line, wherein the first R 2 R D/A conversion portion applies a second current, which varies in accordance with a second signal, to the signal line, wherein the second R 2 R D/A conversion portion applies a third current, which varies in accordance with a first trimming signal, to the signal line, and wherein the third R 2 R D/A conversion portion applies a fourth current, which varies in accordance with a second trimming signal, to a first predetermined node of the R 2 R ladder portion of the first R 2 R D/A conversion portion.