DC2026C - Schematic

5
4
3
2
1
REVISION HISTORY
REV
+5V
J8
5
6
5
1
Y1
16
DISO+
15
RXD
RTS#
USBDM
CTS#
USBDP
DTR#
DSR#
8
19
24
NC
DCD#
RESET#
RI#
NC
CBUS0
27
28
CBUS1
OSCI
CBUS2
OSCO
CBUS3
CBUS4
11
AREF
C21
0.1uF
16V
C18
1.0uF
16V
2
9
10
20
18
C19
0.1uF
16V
21
3
5
R21
1K
6
4
6
23
C22
0.1uF
16V
22
AREF
AVCC
PC5(ADC5/SCL)
PC4(ADC4/SDA)
PC3(ADC3)
PC2(ADC2)
PC1(ADC1)
PC0(ADC0)
GND
GND
GND
VCC
VCC
PD7(AIN1)
PD6(AIN0)
PD5(T1)
PD4(XCK/T0)
PD3(INT1)
PD2(INT0)
PD1(TXD)
PDO(RXD)
C28
0.1uF
16V
13
22
19
14
ADC7
ADC6
TEST
GND
A3
A2
A1
A0
R44 1K
R43
OPT
2
2
D4
YELLOW
J3
A0
A1
A2
A3
SDA
SCL
R33
1
8
R6
4.99K
2
R10
4.99K
+5V
R34
OPT
R15
1K
VCC
VCC2
SCLIN
SDAIN
SCLOUT
SDAOUT
EN
DISCEN
ACC
READY
FAULT
11
R55 49.9
C25
0.1uF
3
10
7
8
4
5
7
6
R56 49.9
SCK/SCL
1
1
10
11
9
12
14
R41
10K
VCCIO
MOSI/SDA
3
8
13
R9
4.99K
TP3
V+
5V
EEVCC
EESCL
EESDA
EEGND
GPIO
SCK/SCL
MISO
MOSI/SDA
CS
B
GND
GND
GND
VCCIO
TP4
J7
CUSTOMER NOTICE
D5
YELLOW
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
TECHNOLOGY
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
M.HAWKINS
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.MARK THOREN TITLE: SCHEMATIC
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
LINDUINO
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
1
ONE:
LINEAR TECHNOLOGY ISOLATED
ARDUINO-COMPATIBLE DEMONSTRATION BOARD
NOTE: ALL RESISTORS AND CAPACITORS ARE
SIZE 0603 UNLESS OTHERWISE SPECIFIED.
SIZE
IC NO.LTM2884
N/A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
R7
4.99K
R40
10K
2
13
IO
7V
1
VCCIO
1
J1
VCCIO
VCCIO
1
2
3
4
5
6
OPT
Q1
VN10LF
1
12
5
TX
1
3
A
1
2
3
4
5
6
7
8
R22
1K
RX
SCK
1
R20
1K
1
ON
D1
YELLOW
2
2
D2
GREEN
R13
1K
R57
24.9
R46 1K
LTC4315CMS
1
2
+5V
ANALOG IN
GPIO
R42
1K
4
9
+5V
R12
1K
3
+
5
GND
VIN
FROM J2, PAGE 2
CS
U4
C32
0.1uF
TX_1
RESET
3
+5V
R45
10K
LT1719CS6
-
3V3
POWER
U11
C8
0.1uF
RX_0
+5V
5
VCCIO
+5V
11
7
10 ~6
9
~5
2
4
1
~3
32
2
31
30
U13-2
C
+5V
R24 1K
+5V
R35 1K
SCL
SDA
26
21
GND
28
27
26
25
24
23
12
R23 1K
18
7
AGND
C23
1.0uF
16V
25
B
3
MUX
R17 1K
8
+5V
5
3V3OUT
GND
17
8
7
4
FROM U1
PAGE 2
DISO-
VCC
1
GND
C
TXD
6
R36
1K
4
20
VCCIO
R37 VCCIO
OPT
6
4
3
C20
0.1uF
16V
13
12
~11
~10
~9
4
FT232RL
29
17
16
15
14
13
12
2
2
PB5(SCK)
PC6 (RESET)
PB4(MISO)
PB3(MOSI/OC2A)
PB2(SS/OC1B)
PB1(OC1A)
PB7(XTAL2/TOSC2)
PB0(ICP1)
PB6(XTAL1/TOSC1)
6
R16
1 MEG
6
NC7WZ125K8X
2
16 Mhz
U9
U12-1
8
7
R54
49.9K
4
R53
49.9K
R39 0 OHM
2
3
U7
R52
49.9K
U13-1
NC7WZ125K8X
8
U12-2
TRACE ON BOTTOM SIDE
+5V
C33
0.1uF
8
3
2
1
R25
49.9K
R8
49.9K
D
VCCIO
C34
0.1uF
RESET
ATMEGA328P-AU
SKU UPDATE TO DC2026C: ADDED R52-R57
VCCIO
DIGITAL(PWM~)
NORM
01
R38 OPT
+5V
JP2
OPT
PRODUCTION RELEASE DC2026B: M.THOREN 4/03/2014
1
R18
10K
4
-
4
D
3
J4
ICSP
7
+5V
R31 100
2
8
7
6
5
4
3
2
1
RESET
SCL
SDA
AREF
GND
13
12
~11
~10
~9
8
MUX
S1
1
7
~6
~5
4
~3
2
TX_1
RX_0
10
9
8
7
6
5
4
3
2
1
J6
DESCRIPTION
4
3
SCALE = NONE
2
REV.
1
DEMO CIRCUIT 2026C
DATE: 05/29/2015
SHEET
1
1
OF
2
A
5
4
U8
L2 10uH
2
LT3461ES6
4
R2
47.5K
SHDN
SW
VOUT
FB
R3
215K
3
C5
15pF
C1
4.7uF
16V
C6
4.7uF
25V
0805
C3
10uF
16V
0805
R1
64.9K
4
ADJ
3
BYP
C2
0.01uF
16V
D
2
D
VIN
7.6V
5
5
IN
GND
C4
1.0uF
16V
7V
VOUT
1
OUTPUT 7.6V @ 100mA
GND
6
1
LT1761ES5-BYP
U2
1
+5V
2
2
1
3
R4
13.7K
C24
0.047uF
16V
U3
R5
42.2K
LT1761ES5-SD
JP1
VCCIO
OPT
1
USB 5V OUTPUT 200mA MAX
2
+5V
USB GND
C30
2.2nF1kV
1206
2
B2100
1
C13
1.0uF
16V
C31
2.2nF1kV
1206
7
5
IN
3
VOUT
SHDN
GND
8
6
1
BYP
5
3.3V
4
C14
0.01uF
16V
C15
10uF
16V
0805
U10
LT3973EMS
+
C26
10uF
50V
SUNCON
C16
2.2uF TP2
1
1206
50V
AC ADAPTOR 5V OUTPUT 750mA MAX
4
9
3
2
5
VIN
PG
EN/UVLO
OUT
GND
SW
BOOST
BD
FB
RT
6
7
8
1
10
C27
0.22uF
0402
L1
15uH
SMT
+5V
B
R28
475K
0402
R29
215K
0402
R14
1MEG
0402
R27
107K
0402
VIN
C10
10pF
COG
0402
C11
22uF
1206
R30
316K
0402
TO J3, PAGE 1
CUSTOMER NOTICE
7V-20V INPUT
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
TECHNOLOGY
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
M.HAWKINS
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.MARK THOREN TITLE: SCHEMATIC
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
LINDUINO
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
PCB MECHANICAL PARTS
MP1
BUMPER, ADHESIVE-BACKED
NOTE: ALL RESISTORS AND CAPACITORS ARE
MP2
BUMPER, ADHESIVE-BACKED
SIZE 0603 UNLESS OTHERWISE SPECIFIED.
MP3
BUMPER, ADHESIVE-BACKED
MP4
BUMPER, ADHESIVE-BACKED
ONE:
LINEAR TECHNOLOGY ISOLATED
ARDUINO-COMPATIBLE DEMONSTRATION BOARD
SIZE
IC NO.LTM2884
N/A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
C
2
R26
0.20 OHMS
0805
D3
1/4W
J2
1
3
2
3V3
LT1761ES5-3.3
1
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
L3
L4
L6
L7
K1
K2
K3
K4
K5
K6
K7
K8
K9
K10
K11
3.3V OUTPUT 50mA MAX
U5
SPND-PWR
USB GND
A
R50
19.1K
ON
B
AC ADAPTOR IN
R19
R51
86.6K 40.2K
JP3
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
TRACE ON BOTTOM SIDE
2
USB GND
TO U9
PAGE 1
STAT
C12
10uF
16V
0805
TP1
4
DISO-
CTL
4 1
VLO
C29
OPT
A6
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
DISO+
3
C9
10uF
16V
0805
5V
R32
OPT
L2
L1
C17
1.0uF
16V
ADJ
5
3.3V
A3
D2+
D2-
VOUT
3
A4
D1+
D1-
IN
2
A5
USB GND
VLO2
LTM2884CY
1
L5
1
A2
A1
VBUS
U1
R48
49.9K
4
2
R49
105K
EXT
2.5V
A7
+5V
LTC4411ES5
GND
USBVCC
USBDUSBD+
USBGND
U6
R11 OPT 0805
L11
L10
L9
L8
11
C
1
2
3
4
5
6
VCC2
VCC2
VCC2
VCC2
GND
USB
VCC
VCC
VCC
VCC
SHDN
1
2
A11
A10
A9
A8
J5
R47
10K 3
5
VOUT
GND
C7
16V
4.7uF
IN
4
3
SCALE = NONE
2
REV.
1
DEMO CIRCUIT 2026C
DATE: 05/29/2015
SHEET
1
2
OF
2
A
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