Datasheet

LTC2757
18
2757f
TYPICAL APPLICATIONS
Figure 2. Basic Connections for SoftSpan V
OUT
DAC with Two Optional Circuits
for Driving I
OUT2
from GND with a Force/Sense Amplifi er
+
–
U2
LT1012
–
+
U1
LT1468
18-BIT DAC WITH SPAN SELECT
LTC2757
V
OSADJ
V
OSADJ
R
COM
4748
R
IN
1, 2
5
7
6
2
8
1
3
4
R2
R1
GE
ADJ
45, 46
R
OFS
43, 44
REF
5V
5V
15V
REF
R
FB
I
OUT1
V
OUT
41, 42
40
I
OUT2
GND
WR
UPD
READ
D/S
CLR
M-SPAN
5, 6
4, 7
36
35
34
33
20
21
3, 37, 38
C2
150pF
SPAN I/O
S2-S0
C1
27pF
V
DD
17
WR
UPD
READ
D/S
CLR
C3
0.1µF
0.1µF
3
8-16, 23-31 39
DATA I/O
D17-D0
16
–
+
66
5
1
23
I
OUT2F
I
OUT2S
2
3
*SCHOTTKY BARRIER DIODE
FOR MULTIPLYING APPLICATIONS, U2 = LT1468 AND C2 = 15pF
ZETEX*
BAT54S
LT1012
2757 F02
1000pF
ALTERNATE AMPLIFIER FOR OPTIMUM SETTLING TIME PERFORMANCE
66
1
23
5
–
+
LT1468
3
ZETEX
BAT54S
2
200Ω
200Ω
I
OUT2S
I
OUT2F
–15V
0.1µF