7
dc1791afa
DEMO MANUAL DC1791A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
scheMAtic DiAgrAM
GND2
AVCC2
K8
SCL
A3
DI1
A5
VCC2
L8
SDA
A4
IVCC2
L7
IVL2
K7
DNC
A2
GND1
A6
ON
A7
VL
A8
VCC
B8
SDA2
L4
O1
L5
AVL2
K6
VL2
L6
DO2
A1
DO1
B1
GND
B3
SCL2
L3
DNC
L2
I2
L1
I1
K1
GND2
K2
U1 LTM2887CY
-*
C3
470pF 1808
C4
470pF 1808
PCB SUBSTRA
TE 'BRIDGE' CAP
ACIT
OR, 20pF
TOT
AL
TOP
COPPER
TOP
COPPER
INNER LA
YER 1
R7
OPEN
R8
1.15k
R10
OPEN
C2 1uF 0508
JP1
ON
C1 10uF 3216
1
2
3
4
5
6
7
8
9
10
J1
R1 *
R2 *
1
2
3
4
5
6
7
8
9
10
J2
VCC VCC DI1 DNC DO1
GND GND SDA SCL DO2
LTM2887-I
VCC VCC CSB DO2 DO1
GND GND SDI SCK SDO
LTM2887-S
VL2 GND2 SDA2 SCL2
I2
VCC2 GND2
O1 DNC I1
LTM2887-I
VL2 GND2 SDI2 SCK2 SDO2
VCC2 GND2 CS2B
I2 I1
LTM2887-S
R3
*
R4
*
OFF
-
2
2ND PROT
OTYPE
KEITH B.
3-4-15
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
1
2
3
4
5
6
7
TITLE: SCHEMA
TIC
SIZE
IC NO.
REV
.
DA
TE:
SHEET
OF
APPROV
ALS
SCALE = NONE
CUST
OMER NOTICE
W
ednesday
, March 04, 2015
2
SPI/DIGIT
AL
OR I2C uMODULE ISOLA
TOR, LOW EMI
KEITH B.
1
1
LTM2887CY
-3S/-5S/-3I/-5I
DEMO CIRCUIT
1791A
ECO
REV
APPROVED
DA
TE
REVISION HIST
OR
Y
DESCRIPTION
1630 McCarthy Blvd. Milpitas, CA
95035
Phone: (408) 432-1900 Fax: (408) 434-0507 www
.linear
.com
LTC CONFIDENTIAL
FOR CUST
OMER
USE ONL
Y
THIS CIRCUIT
IS PROPRIET
AR
Y
TO
LINEAR
TECHNOLOGY
AND SUPPLIED FOR
USE WITH LINEAR
TECHNOLOGY
P
AR
TS.
LINEAR
TECHNOLOGY
HAS MADE
A BEST
EFFOR
T
TO DESIGN
A CIRCUIT
THA
T MEETS CUST
OMER -
SUPPLIED SPECIFICA
TIONS; HOWEVER, IT
REMAINS
THE CUST
OMERS RESPONSIBILITY
T
O VERIFY
PROPER
AND RELIABLE OPERA
TION IN
THE
ACTUAL
APPLICA
TION. COMPONENT
SUBSTITUTION
AND
PRINTED CIRCUIT
LA
YOUT
MA
Y SIGNIFICANTL
Y
AFFECT
CIRCUIT
PERFORMANCE OR RELIABILITY
.
CONT
ACT
LINEAR
TECHNOLOGY
APPLICA
TIONS
ENGINEERING
FOR ASSIST
ANCE.
TECHNOLOGY
PCB DES.
APP
ENG.
KEITH B.
INPUT
CONNECT
OR
OUTPUT
CONNECT
OR
N/A
NOTES: UNLESS OTHER
WISE SPECIFIED
1.
ALL
RESIST
ORS
ARE IN OHMS, 0805.
ALL
CAP
ACIT
ORS
ARE IN MICROF
ARADS, 0805.
ASSY
U1
VCC
R1
R2
R3
R4
LTM2887CY
-3S
-A
3.0V - 3.6V
OPT
OPT
OPT
0
LTM2887CY
-5S
-B
4.5V - 5.5V
OPT
OPT
OPT
0
LTM2887CY
-3I
-C
3.0V - 3.6V
10K
10K
0
OPT
LTM2887CY
-5I
-D
4.5V - 5.5V
10K
10K
0
OPT
*
VCC
R9
1.15k
R6
OPEN
R5
OPEN
