Datasheet

LTC6420-20
10
642020fb
APPLICATIONS INFORMATION
Figure 4a. Top Silkscreen of DC1299, Test Circuit A
Figure 4b. Demo Circuit 1299 Schematic (Test Circuit A)
642020 F04b
R7
OPT
R5
[2]
R9
[2]
C25
0.1µF
C22
0.1µF
C22
[1]
••
C21
[1]
C22
0.1µF
+INA
–INA
R11
OPT
R10
[2]
R12
[2]
C34
0.1µF
C31
[1]
C30
0.1µF
••
C30
0.1µF
C22
[1]
–INB
+INB
C18
0.1µF
C19
0.1µF
V
+
C18
0.1µF
C19
0.1µF
V
+
V
+
R1
1.21k
1%
R2
1k
1%
V
+
R16
1.21k
1%
R18
1k
1%
C16
0.1µF
TD4
V
OCMA
TD5
GND
TD3
GND
TD2
V
+
2.85V TO
3.5V
C35
1000pF
C32
1000pF
C30
0.1µF
C34
[1]
C17
[1]
C28
0.1µF
TD1
V
OCMB
R5
[1]
R3
1.5k
1%
V
+
V
+
R17
1.5k
1%
C43
0.1µF
1
2
3
5
4
12
12
T2
TCM4-19+
C39
0.1µF
+OUTA
–OUTA
C35
[1]
C40
0.1µF
C32
0.1µF
C41
[1]
R14
[1]
C44
0.1µF
1
2
3
5
4
12
12
T4
TCM4-19+
–OUTB
+OUTB
+INA
–INA
V
–
V
–
–INB
+INB
–OUTA
V
+
A
V
–
V
–
V
+
B
–OUTB
V
+
AV
OCMA
+OUTAENB
V
+
BV
–
V
OCMB
+OUTBENA
C42
0.1µF
C14
4.7µF
C15
1µF
V
+
VERSION
–C
–G
U1
LTC6420CUDC-20
LTC6421CUDC-20
R5, R9, R10, R13
NONE
NONE
T1, T3
TCM4-19+
TCM4-19+
NOTES: UNLESS OTHERWISE SPECIFIED
[1] DO NOT STUFF
[2]
R4
88.7
R5
88.7
R12
88.7
R15
88.7
ENA
JP1
DIS
EN
3
4
5
6
2
116
15
14
13
12
11
21 7 8 9 10
20 19 18 17
1
2
3
V
+
ENB
JP2
DIS
EN
1
2
3
J1
J2
J5
J7
J3
J4
J6
J8
1
2
3
5
4
1
2
3
5
4
12
12
12
12
12
[2]
T3
[2]
T1
U1
[2]
LTC6420-20