12
LTC1451
LTC1452/LTC1453
sn145123 145123fas
LINEAR TECHNOLOGY CORPORATION 1995
LT/TP 0100 2K REV A • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900
●
FAX
: (408) 434-0507
●
TELEX
: 499-3977
PART NUMBER DESCRIPTION COMMENTS
LTC1257 5V to 15V Single Supply, Complete 12-Bit V
OUT
Reference Can Be Overdriven Up to 12V, i.e., FS MAX = 12V
DAC in SO-8 Package
LTC1446/LTC1446L Dual 12-Bit V
OUT
DACs in SO-8 5V with 4.096V Full-Scale Output/3V with 2.5V Full Scale
LTC1448 Dual 12-Bit V
OUT
DAC in SO-8 V
CC
from 2.7V to 5.5V, Output Swings to V
REF
LTC1655/LTC1655L 5V/3V 16-Bit V
OUT
DAC in SO-8 Pin Conpatible with LTC1451/LTC1453
LTC1659 Single 12-Bit V
OUT
DAC in MSOP V
CC
from 2.7V to 5.5V, Output Swings to V
REF
LTC7541 12-Bit Multiplying Parallel I
OUT
DAC 5V to 16V Supply, 12-Bit Wide Interface
LTC7543/LTC8143 12-Bit Multiplying Serial I
OUT
DAC 5V Supply, Clear Pin and Serial Data Output (LTC8143)
LTC8043 12-Bit Multiplying Serial I
OUT
DAC 5V Supply, SO-8 Package
RELATED PARTS
A Wide Swing, Bipolar Output 12-Bit DAC
CLK
D
IN
CS/LD
µP
0.1µF
V
CC
V
OUT
GND V
REF
R1
5k
5V
LTC1451
1451/2/3 TA06
–
+
LT1077
5V
–5V
R2
10k
R3
10k
R5
20k
R4
20k
2 • D
IN
• 4.095
4096
V
OUT
:
D
IN
V
OUT
4.094
–4.096
2048 4095
– 4.096V
This circuit shows how to make a bipolar output 12-bit
DAC with a wide output swing using an LTC1451 and an
LT1077. R1 and R2 resistively divide down the LTC1451
output and an offset is summed in using the LTC1451
onboard 2.048V reference and R3 and R4. R5 ensures that
the onboard reference is always sourcing current and
never has to sink any current even when V
OUT
is at full-
scale. The LT1077 output will have a wide bipolar output
swing of –4.096V to 4.094V as shown in the figure above.
With this output swing 1LSB = 2mV.
TYPICAL APPLICATION
U
