schematic

1. 5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
LTM2884
ANALOG IN
NORM
ICSP
NOTE: ALL RESISTORS AND CAPACITORS ARE
SIZE 0603 UNLESS OTHERWISE SPECIFIED.
M.HAWKINS
MARK THOREN
OPT
FROM U1
DIGITAL(PWM~)
POWER
SCK
FROM J2, PAGE 2
TX
RX
ON
IO
PAGE 2
MUX
RESET
TRACE ON BOTTOM SIDE
MUX
LINEAR TECHNOLOGY ISOLATED
ARDUINO-COMPATIBLE DEMONSTRATION BOARD
LINDUINO ONE:
05/29/2015
- PRODUCTION RELEASE DC2026B: M.THOREN 4/03/2014
01 SKU UPDATE TO DC2026C: ADDED R52-R57
A0
A1
A2
A3
7
~6
~5
4
~3
2
AREF
~11
~9
RX_0
RESET
TX_1
SCL
SDA
AREF
GND
13
12
~11
~10
~9
8
7
~6
~5
4
~3
2
TX_1
RX_0
SCL
SDA
A3
A2
A1
A0
GND
RESET
13
13
SCK/SCL MOSI/SDA
GPIO
CS
SCL
SDA
~10
12
8
+5V
+5V
+5V
+5V
VCCIO
7V
+5V
+5V
3V3
+5V
+5V
+5V
VCCIO
VCCIO
+5V
VCCIO
+5V
+5V
VCCIO
VCCIO
+5V
VCCIO
VCCIO
VCCIO
DISO-
DISO+
VIN
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 2026C
1 2
N/A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 2026C
1 2
N/A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 2026C
1 2
N/A
REVISION HISTORY
DESCRIPTION
REV
REVISION HISTORY
DESCRIPTION
REV
REVISION HISTORY
DESCRIPTION
REV
R31 100
U7
ATMEGA328P-AU
PC6 (RESET)
29
PB6(XTAL1/TOSC1)
7
AREF
20
GND
5 GND
3
AVCC
18
GND
21
PB7(XTAL2/TOSC2)
8
VCC
4
VCC
6
ADC7
22
ADC6
19
PDO(RXD)
30
PD1(TXD)
31
PD2(INT0)
32
PD3(INT1)
1
PD4(XCK/T0)
2
PD5(T1)
9
PD6(AIN0)
10
PD7(AIN1)
11
PC0(ADC0)
23
PC1(ADC1)
24
PC2(ADC2)
25
PC3(ADC3)
26
PC4(ADC4/SDA)
27
PC5(ADC5/SCL)
28
PB0(ICP1)
12
PB1(OC1A)
13
PB2(SS/OC1B)
14
PB3(MOSI/OC2A)
15
PB4(MISO)
16
PB5(SCK)
17
R42
1K
C21
0.1uF
16V
R55 49.9
R41
10K
U12-1
NC7WZ125K8X
6
8
4
2
1
D5
YELLOW
2
1
C33
0.1uF
R25
49.9K
R10
4.99K
R6
4.99K
C20
0.1uF
16V
R9
4.99K
S1
R45
10K
C28
0.1uF
16V
D4
YELLOW
2
1
R44 1K
R16
1 MEG
D1
YELLOW
2
1
U13-2
3
8
4
5
7
R18
10K
C23
1.0uF
16V
R35 1K
C34
0.1uF
R37
OPT
R12
1K
JP2
1
3
2
J1
V+
1
GND
3
MISO
5
MOSI/SDA
7
EESDA
9 EESCL
11
GND
13
5V
2
SCK/SCL
4
CS
6
GND
8
EEVCC
10
EEGND
12
GPIO
14
C19
0.1uF
16V
C32
0.1uF
R34
OPT
Y1
16 Mhz
1
3
2
R17 1K
R8
49.9K
+
-
U11
LT1719CS6
3
1
5
4
2
6
U9
FT232RL
TXD
1
RXD
5
RTS#
3
CTS#
11
DTR#
2
DSR#
9
DCD#
10
RI#
6
CBUS0
23
CBUS1
22
CBUS2
13
CBUS3
14
CBUS4
12
TEST
26
GND
21
GND
18
GND
7
AGND
25
VCCIO
4
VCC
20
USBDM
16
USBDP
15
NC
8
RESET#
19
NC
24
OSCI
27
OSCO
28
3V3OUT
17
R36
1K
R33
OPT
R23 1K
R39 0 OHM
U13-1
NC7WZ125K8X
6
8
4
2
1
R21
1K
J7
1
2
3
4
5
6
J6
1
2
3
4
5
6
7
8
9
10
R38 OPT
J4
1
3
5 6
4
2
D2
GREEN
2
1
R46 1K
U12-2
3
8
4
5
7
R22
1K
R24 1K
TP4
1
R13
1K
C8
0.1uF
R56 49.9
U4
LTC4315CMS
EN
1
GND
6
READY
7
DISCEN
2
SCLOUT
3
ACC
5
SCLIN
4
FAULT
8
SDAIN
9
SDAOUT
10
VCC2
11
VCC
12
R15
1K
TP3
1
R20
1K
R7
4.99K
R53
49.9K
R54
49.9K
C25
0.1uF
J8
1
2
3
4
5
6
7
8
C18
1.0uF
16V
R52
49.9K
J3
1
2
3
4
5
6
7
8
R57
24.9
R40
10K
Q1
VN10LF
1
2
3
R43
OPT
C22
0.1uF
16V

2. 5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
3.3V
AC ADAPTOR IN
USB GND
USB
USB GND
NOTE: ALL RESISTORS AND CAPACITORS ARE
SIZE 0603 UNLESS OTHERWISE SPECIFIED.
TO U9
PAGE 1
TO J3, PAGE 1
OPT
TRACE ON BOTTOM SIDE
USB GND
USB GND
OUTPUT 7.6V @ 100mA
3.3V OUTPUT 50mA MAX
AC ADAPTOR 5V OUTPUT 750mA MAX
USB 5V OUTPUT 200mA MAX
7V-20V INPUT
5V
3.3V
2.5V
EXT
PCB MECHANICAL PARTS
M.HAWKINS
MARK THOREN
05/29/2015
LINEAR TECHNOLOGY ISOLATED
ARDUINO-COMPATIBLE DEMONSTRATION BOARD
LINDUINO ONE:
LTM2884
7.6V
USBD-
USBD+
USBVCC
USBGND
+5V
+5V
3V3
+5V
7V
+5V
VCCIO
DISO+
DISO-
VIN
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 2026C
2 2
N/A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 2026C
2 2
N/A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 2026C
2 2
N/A
MP1 BUMPER, ADHESIVE-BACKED
R14
1MEG
0402
TP1
1
D3
B2100
2 1
C15
10uF
16V
0805
R28
475K
0402
MP4 BUMPER, ADHESIVE-BACKED
R11 OPT 0805
R32
OPT
R4
13.7K
C9
10uF
16V
0805
R47
10K
J5
1
2
3
4
5
6
R3
215K
U6
LTC4411ES5
GND
2
STAT
4
IN
1
VOUT
5
CTL
3
C14
0.01uF
16V
R26
0.20 OHMS
0805
1/4W
+
C26
10uF
50V
SUNCON
C12
10uF
16V
0805
C4
1.0uF
16V
C24
0.047uF
16V
C17
1.0uF
16V
MP2 BUMPER, ADHESIVE-BACKED
C7
4.7uF
16V
C16
2.2uF
1206
50V
R5
42.2K
C27
0.22uF
0402
R50
19.1K
U8
LT1761ES5-BYP
GND
2
BYP
3
IN
1 VOUT
5
ADJ
4 R1
64.9K
C10
10pF
COG
0402
C11
22uF
1206
U3
LT1761ES5-SD
GND
2
SHDN
3
IN
1
VOUT
5
ADJ
4
U5
LT1761ES5-3.3
GND
2
BYP
4
IN
1
VOUT
5
SHDN
3
JP3
1
3
5
6
4
2
7
8
C31
2.2nF1kV
1206
C2
0.01uF
16V
R30
316K
0402
R2
47.5K
C3
10uF
16V
0805
L2 10uH
1 2
J2
2
3
1
MP3 BUMPER, ADHESIVE-BACKED
TP2
1
R27
107K
0402
R48
49.9K
C30
2.2nF1kV
1206
C6
4.7uF
25V
0805
L1
15uH
SMT
1
2
R51
40.2K
R29
215K
0402
C13
1.0uF
16V
C29
OPT
U10
LT3973EMS
PG
9
RT
10
BOOST
7
EN/UVLO
3
OUT
2
GND
11
GND
5
VIN
4
FB
1
BD
8
SW
6
U2
LT3461ES6
SW
1
GND
2
FB
3
VIN
6
SHDN
4
VOUT
5
R49
105K
C1
4.7uF
16V
R19
86.6K
JP1
1 2
C5
15pF
U1
LTM2884CY
D1+
A2
D1-
A1
SPND-PWR
A3
ON
A4
VLO
A5
GND
B1
GND
B2
GND
B3
GND
B4
GND
B5
GND
B6
GND
B7
GND
B8
GND
B9
GND
B10
GND
B11
GND2
K1
GND2
K2
GND2
K3
GND2
K4
GND2
K5
GND2
K6
GND2
K7
GND2
K8
GND2
K9
GND2
K10
GND2
K11
GND2
L3
GND2
L4
GND2
L6
GND2
L7
GND
A6
VBUS
A7
VCC
A8 VCC
A9 VCC
A10 VCC
A11
D2-
L1
D2+
L2
VLO2
L5
VCC2
L8
VCC2
L9
VCC2
L10
VCC2
L11