Datasheet

LTC2754
26
2754f
TYPICAL APPLICATION
Digitally Controlled Offset and Gain Trim Circuit. Powering V
DD
from LT1236 Ensures Quiet Supply
TO LT1991
TO LT1991
GE
ADJA
GE
ADJB
GE
ADJC
GE
ADJD
GND
1
GND GND GND SROGND
R
INA
2
R
FBA
49
R
OFSA
REFA
5051
REFB
42
R
COMA
52
R
FBB
44
R
OFSB
43
R
INC
R
IND
R
FBC
R
OFSD
R
FBD
V
OSADJD
I
OUT2D
R
COMC
R
COMD
R
OFSC
REFC REFD
40
450k
V
+
V
–
OUT 6
7
5
4
LT1991
REF
4µF
27
TO LT1991s
14 4 11 37 53 28
5V
26 13 15 25 24 23 16 17 18
20
12
27pF
LT1469
TO LT1991
V
+
V
–
I
OUT1D
19
9
+
–
150pF
150pF
I
OUT2C
29
V
OSADJC
21
27pF
LT1469
1
8
2
3
6
5
4
V
OUTA
2754 TA02
V
OUTC
V
OUTB
V
OUTD
LT1469
V
+
V
–
+
–
8
7
2
3
4
LT1469
V
+
V
–
+
–
+
–
8
2
3
4
4
8
7
2
3
4
8
7
6
5
4
8
7
V
+
V
–
I
OUT1C
22
+
–
I
OUT2B
38
V
OSADJB
46
27pF
V
+
V
–
I
OUT1B
45
+
–
I
OUT2A
3
V
OSADJA
47
27pF
V
+
V
–
I
OUT1A
RFLAG
CLR
48
+
–
150pF
V
–
V
+
+
–
8
1
2
3
4
V
+
V
–
+
–
8
7
6
5
4
150pF
R
RCOMB
LTC2754
41
R
INB
39
V
DD
SDI
CS/LD
5V
10
30
31
5
6
SCK
7
SRO
2
3
4
5
12
13
14
15
7
8
9
10
6
8
M-SPAN
32
S2
35
S1
34
S0
33
LDAC
36
10k
LT1236-5
IN
OUT
TRIM
GND
4
62
V
+
5
10µF
0.1µF
T0
ADDITIONAL
OFFSET ADJUST
CIRCUITS
T0
ADDITIONAL
GAIN ADJUST
CIRCUITS
0.1µF
10k
CS1
SDI
SCK
SDO
CS2
0.1µF10µF
10k10k
V
OUTA
V
OUTB
V
OUTC
V
OUTD
V
OUTE
V
OUTF
V
OUTG
V
OUTH
CS/LD
SCK
SDI
CLR
LDAC
V
CC
REF
LTC2636
16
GND
111
5V
4µF
450k
450k
150k
50k
M9
M3
M1
50k
450k
150k
P1
P3
P9
8
9
10
1
2
3
450k
V
+
V
–
OUT 6
7
5
4
LT1991
REF
4µF
+
–
4µF
450k
450k
150k
50k
M9
M3
M1
50k
450k
150k
P1
P3
P9
8
9
10
1
2
3