DC979A - Schematic

5
4
3
2
U2
LT1236ACS8-5
NOTES: UNLESS OTHERWISE SPECIFIED
1
10 ADCINB
11 ADCINA
3
C12
0.1UF
VCC
2
INT-EXT/ 3
R8
0
0805
R11 OPT
0
0805
D2
BAT54S
1
1
R6
10K
1 I1
2 GND
FO
R7
51
R12
0
0805
3
MUXOUTB 26
MUXOUTA 27
18 -INB
17 OUTB
4
C14
0.1UF
R5
100
VCC 8
WP 7
C11
0.1UF
3 A2 SCL 6
4 VSS SDA 5
R2
4.99K
1%
R3
4.99K
1%
10 EEVCC
9 EESDA
R4
4.99K
1%
11 EESCL
12 EEGND
+INA
+INB 19
+INB
VCC
C13
0.1UF
JP8
OPT
C15
0.1UF
2 D
1 CP
R13
10K
U5
NL17SZ74US
Q 5
Q 3
C
14 NC
MUXOUTA
R10
0
0805
+INA 25
B
1 A0
2 A1
MUXOUTB
R9
0
0805
12 OUTA
13 -INA
S 6
VCC 5
Z 4
3 I0
U3
24LC025
VCC
GND
2
28 COM
D1
BAT54S
U4
NC7SZ157P6X
OPT
J2
VCC 8
PR 7
VCC
C
BUSY
FO
GND
COM
5 MISO
7 MOSI
GND
E7
BUSY 2
FO 34
8 CH2
9 CH3
OPT
3
CH3
R1
MISO
MOSI
8
CH2
E6
SDO 36
SDI 33
1 V+
2 5V
13
E5
6 CH0
7 CH1
J1
HD2X7-079-MOLEX
6 CS
4 SCK
SCK
CLR
COM
CH1
0603
0603
CS
CS/ 35
SCK 1
C7 VIN
4.7UF,10V
VCC
C8
4.7UF,10V
2
3
4
5
CH3
CH0
E4
U1
LTC2442CG
24
CH2
30 REF+
31 REF-
REF-
E3
V+
GND
CH1
REF+
GND
CH0
C10
0.01UF
D
GND
C9
4.7UF,10V
0603
2. INSTALL SHUNTS ON JP1-JP7 PIN 1 AND 2.
C4
0.1UF
VIN
JP4
TRIG. MODE
TRIG.
NORMAL
E16
VIN
VCC
E8
VCC
E9
GND
6
E2
VCC
32
REF-
C6
0.01UF
C3
0.01UF
4
C5
4.7UF,10V
0603
V+
MOSI
E1
C2
4.7UF,10V
0603
GND
REF+
VCC
MISO
D
VCC
CS
EXT
JP2
REFEXT
GND
JP3
COM
EXT
GND
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
SCK
VOUT 6
TRIM 5
V-
3 NC
C1
0.1UF
4 GND
JP1
REF+
5V
V+ 21
NC 8
NC 7
VCC 29
1 NC
2 VIN
5
VIN
1
B
VU6
LTC1983ES6-5
VCC
C16
4.7UF,10V
0603
C17
4.7UF,10V
0603
-5V
-5V
C19
2.2UF,10V
0805
C20
2.2UF,10V
0805
D3
BAT54S
2
1
+10V
E15
+10V
C21
4.7UF,10V
0603
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
CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CONTRACT NO.
APPROVALS
4
3
TECHNOLOGY
DRAWN:
TITLE:
CHECKED:
APPROVED:
ENGINEER: MARK T.
DESIGNER: KIM T.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
E12
GND
JP7
V-
E13
V-5V
CUSTOMER NOTICE
A
V+
E10
V+
E14
GND
3
OFF
0805
+10V VCC
GND
C18
2.2UF,10V
JP5
AMP SUPPLY
ON
+10V
VCC
E11
-5V
1 VCC
VOUT 2
6 SHDN GND 5
3 C+
C- 4
JP6
V+
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
SCHEMATIC
4-CHANNEL, HIGH SPEED, 24-BIT ADC WITH BUFFER
SIZE
A
DATE:
2
V-
DWG NO.
REV
DC979A-LTC2442CG
Monday, September 26, 2005
SHEET
1
A
1
OF 1
A
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