DC861A - Schematic

5
4
3
2
1
EXT
CLK
D
DIN CS/LD
TP1
TP2
GND
TP3
+5V
TP4
GND
TP5
+5V
VSLV
TP6
D
TP7
VSLV
J1
SEE TABLE
V+PGA
1
3
INT_DIN
4
6
INT_CS/LD
7
9
GND
TP8
OUTA
8
5
2
V+
INT_CLK
C1
22uF
10V
X5R
GND
R2
51k
R3
51k
TP11
C3
22uF
10V
X5R
VC
V-PGA
TP13
J6
INA
1
2
Single
4
3
Dual
C2
0.1uF
X5R
U1
NC7NZ17K8X
1
R4
51k
TP10
V+PGA
2
3
4
Vcc
8
3Y
1Y
7
2A
3A
6
GND
2Y
5
1A
GND
TP12
+5V
MUX'D
PGA
1
2X2
TP15
J2
SEE TABLE
3
4
6
7
9
GND
INT_SHDN
TP18
B
GND
1
A1
2
GND
3
A2
Y1
6
VCC
5
Y2
4
C6
0.1uF
X5R
TP19
NC
NC
16
2
INA
OUTA
15
V-
14
OUTB
13
3
AGND
4
INB
5
SHDN
V+
12
6
CS/SD
NC
11
7
DIN
DGND
10
8
CLK
DOUT
9
C5
0.1uF
X5R
V+PGA
R1
604
C15
1uF
X5R
C17
MBR0520
2
V+PGA
U3
NC7WZ17P6X
1
C
D1
LED
LN1351C-TR
C16
MBR0520
DAISY
CHAIN
OUTPUT
C7
0.1uF
X5R
1
TP17
V-PGA
2
INB
U2
LTC6912**
1
C4
1uF
X5R
R5
604
DUAL
PGA
5
8
AGND
TP16
OUTB
TP14
2
TP9
J3
MOLEX
1
3
5
7
9
11
13
2
4
6
8
10
12
14
B
MUXOUT
MUXMODE
**
ASSEMBLY
DCHAIN
U2
DC861A-A
LTC6912CGN-1
DC861A-B
LTC6912CGN-2
Note:
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
A
J1, SERIAL CONTROL JUMPER
DEFAULT POSITION
LOCAL CONTROL
OPTIONAL POSITION
EXTERNAL SERIAL CONTROL THRU. TURRETS
MUX'D PGA
SHORTED PINS: 1 and 2
SHORTED PINS: 2 and 3
SHORTED PINS: 1 and 4
4 and 7
SHORTED PINS: 5 and 6
SHORTED PINS: 2 and 5
5 and 8
SHORTED PINS: 7 and 8
SHORTED PINS: 8 and 9
SHORTED PINS: 3 and 6
6 and 9
4
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
Supplied For Use With Linear Technology Parts.
DUAL PGA
SHORTED PINS: 4 and 5
5
Customer Notice
J2, PGA OUTPUT CONTROL JUMPER
3
2
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
Dual Programmable PGA
Size
Document Number
Date:
Thursday, December 08, 2005
DEMO 861A
Rev
LTC6912CGN-1, -2
Sheet
1
1
of
2
A
5
4
3
2
1
U8
NC7WZ17P6X
1
3
5
7
9
11
13
2
4
6
8
10
12
14
8
3Y
1Y
7
1
2A
3A
6
2
NIC1
2Y
5
3
COM3
3
4
GND
COM1
14
8
MOLEX
MUXOUT
NO1
16
IN1
15
NIC2
NC3
4
COM2
NO2
9
IN2
10
NC4
5
7
NIC3
6
COM4
12
NIC4
INT_CS/LD
U5
PI5A383A
INT_DIN
D
R6
604
R7
604
R8
604
R9
604
R11
604
R14
604
R16
604
MUXMODE
INT_CLK
R13
604
VSLV
U6
DAISY
CHAIN
MASTER
Y1
4MHZ
MURATA
CSTCR4M00G53-R0
1
D4
LED
LN1351C-TR
2
R17
10k
9
10
3
1
AGND
SHDN
PGA
SW3
SS12SDP4
OSC1/CLKIN
OSC2/CLKOUT
18
17
16
15
14
13
12
11
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0/INT
28
27
26
25
24
23
22
21
MCLR/VPP
2 COM
ENBL
3
8
L1
10uH
LQH32CN100K24
VIN
3
D5
MBR0520
2
SHDN
FB
C12
10uF
6.3V
X5R
VSS
3 7 4 8
5
C AGB
DP
DIGIT 2
9
6
Q1
MMBT3904
1
R21
3.24k
R22
3.24k
R23
3.24k
R24
3.24k
Q2
MMBT3904
+5V
2
4
6
HD2X3
3
3 7 4 8
C AGB
DIGIT 2
9
6
Q3
MMBT3904
1
1
Q4
MMBT3904
1
B
+5V
J5
1
3
5
2 1 10
D E F
DIGIT 1
LED2
LTD-2701G
R26
3.24k
R27
82.5k
R28
909k
R29
232k
R30
100k
R31
42.2k
R32
11.0k
SW4
SW5
SW6
SW7
SW8
SEND
STORE
UP
DOWN
SELECT
R33
100k
2
U7
LT1930ES5
R20
100k
+5V
R25
243K
GND
4
1
L2
10uH
LQH32CN100K24
1
D-OFF
C13
2.2uF
10V
X5R
C11
1uF
X5R
SW
2
5
On
D-ON
V+PGA
1
D E F
DIGIT 1
LED1
LTD-2701G
7
6
5
4
3
2
RA5/AN4/SS
RA4/T0CKI
RA3/AN3/VREF+
RA2/AN2
RA1/AN1
RA0/AN0
2 1 10
DP
19
VSS
B
SW1
SS12SDP2
C
5
RC7/RX/DT
RC6/TX/CK
RC5/SDO
RC4/SDI/SDA
RC3/SCK/SCL
RC2/CCP1
RC1/T1OSI/CCP2
RC0/T1OSO/T1CKI
R19
604
+5V
1
On
DGND
R18
100k
R15
1k
PIC16F873A-I/SS
VDD
3
VSLV
C10
0.1uF
X5R
+5V
D3
BAV74LT1
3
4
5 COM
6
OFF
R12
100k
+5V
20
C
1
2 COM
3
On
ON
D2
LED
LN1351C-TR
+5V
2
SW2
SS22SDP2
1
DCHAIN
INT_SHDN
3
J4
D
Vcc
1A
2
2
1
3
DAISY
CHAIN
INPUT
C8
0.1uF
X5R
2
4
+5V
C9
0.1uF
X5R
U4
NC7NZ17K8X
3
Y2
C14
0.1uF
X5R
2
5
2
A2
6
11
3
Y1
VCC
VCC
GND
GND
A1
2
13
1
LINEAR TECHNOLOGY CORPORATION
A
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
5
4
3
2
Dual Programmable PGA
Size
Document Number
Date:
Thursday, December 08, 2005
DEMO 861A
Rev
LTC6912CGN-1, -2
Sheet
1
2
of
2
A
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