REV. B

DAC8043A

–4–

SRI

CLK

LD

SRI

CLK

LD

FS

ZS

DATA LOADED MSB(D11) FIRST

DAC REGISTER LOAD

D11

D10

D9

D8

D6

D5

D4

D3

D2

D1

D0

D7

1 LSB

ERROR BAND

Dxx

Figure 2. Timing Diagram

Table I. Control-Logic Truth Table

CLK

LD

Serial Shift Register Function

DAC Register Function

u

H

Shift-Register-Data Advanced One Bit Latched

H or L

L

No Effect

Updated with Current Shift Register Contents

L

u

No Effect

Latched All 12 Bits

NOTES

u positive logic transition.

The DAC Register

LD input is level-sensitive. Any time LD is logic-low data in the serial register will directly control the

switches in the R-2R DAC ladder.

TOTAL UNADJUSTED ERROR – LSB

15

20

0

–1.0

1.0

10

30

–0.5

0.0

0.5

SS = 200 UNITS

25

5

35

Figure 3. Total Unadjusted Error Histogram

Typical Performance Characteristics

FULL SCALE TEMPCO – ppm/ C

30

20

0

0

10

40

50

SS = 200 UNITS

12

Figure 4. Full-Scale Output Tempco Histogram