LTC1446 Linear Technology, LTC1446 Datasheet - Page 9

• Manufacturer Part Number: LTC1446
• Description: Dual 12-Bit Rail-to-Rail Micropower DACs in SO-8
• Manufacturer: Linear Technology

This circuit shows how to use an LTC1446 and an
LT
with an offset that can be digitally programmed. V
which can be set by loading the appropriate digital code
TYPICAL APPLICATIONS
®
1077 to make a wide bipolar output swing 12-bit DAC
A Wide Swing, Bipolar Output DAC with Digitally Controlled Offset
P
V
U
OUT
–4.096
–8.190
8.190
4.094
0
N
CLK
D
CS/LD
D
IN
OUT
LTC1446
OUT A
V
V
OUT B
OUT A
GND
A: V
B: V
C: V
V
CC
,
OUT A
OUT A
OUT A
for DAC A, sets the offset. As this value changes, the
transfer curve for the output moves up and down as
illustrated in the graph below.
5V
0V
2.048V
4.095V
50k
50k
100k
0.1 F
A
B
C
1446/46L F02
+
–
LT1077
–15V
15V
100k
D
IN
LTC1446/LTC1446L
V
2 (V
OUT
OUT B
=
– V
OUT A)
9