14

LTC1411

1411f

APPLICATIO S I FOR ATIO

Figure 12. LTC1411 Bipolar Transfer Characteristics

(2’s Complement)

Figure 11b. CONVST Starts a Conversion with a Short Active High Pulse

Figure 11a. CONVST Starts a Conversion with a Short Active Low Pulse

Figure 13. Offset and Full-Scale Adjustment

DATA N

DB13 TO DB0

DATA (N + 1)

DB13 TO DB0

DATA (N – 1)

DB13 TO DB0

CONVST

BUSY

1411 F11a

DATA

(SAMPLE N)

DATA (N – 1)

DB13 TO DB0

(SAMPLE N)

CONVST

BUSY

1411 F11b

DATA N

DB13 TO DB0

DATA (N + 1)

DB13 TO DB0

DATA

INPUT VOLTAGE (V)

2.5V

–1

LSB

1411 F12

011...111

011...110

000...001

000...000

100...000

100...001

111...110

1

LSB

BIPOLAR

ZERO

111...111

FS/2 – 1LSB

–FS/2

1LSB =

=

= 219.7

µV

3.6V

16384

FS

16384

R7

51

Ω

R1

51

Ω

R3

51k

R2

10k

OFFSET

ADJUST

FULL-SCALE

ADJUST

5V

R4

100k

R5

750

Ω

R6

100k

5V

+

–

LTC1411

REFIN

1411 F13