Datasheet
7
dc846af
DEMO MANUAL DC846A
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
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A
B B
C C
D D
NOTES:
Normal
Trig.
5V
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
However, It Remains The Customer's Responsibility To
Application. Component Substitution And Printed
Applications Engineering For Assistance.
Circuit That Meets Customer-Supplied Specifications;
Circuit Board Layout May Significantly Affect Circuit
This Circuit Is Proprietary To Linear Technology And
Supplied For Use With Linear Technology Parts.
Customer Notice
Linear Technology Has Made A Best Effort To Design A
Verify Proper And Reliable Operation In The Actual
Performance Or Reliability. Contact Linear Technology
GND
Ext.
Ext.
Ext.
GND
Ext.
LT1368 REQUIRES 0.1uF OUTPUT CAP.
Ext.
GND Vcc
FOR COMPENSATION
NOTES:
LEVEL
CMOS
Demo Circuit 846A LTC2447UHF
24-Bit High Speed 4-/8-Channel Delta Sigma ADC
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITA
S, CA. 95035-7487
VOICE (408) 432-1900 FAX (408) 434-0507
11Wednesday, November 24, 2004
Title
Size Document Number Rev
Date: Sheet
of
CS
SDO
SCK
FO
SDI
Vcc
Vcc
Vcc
V+
Vcc
V+
Vcc
Vcc
R9
J1
FO (Opt.)
1
2
3
4
5
JP2
AMP V-
1
2
3
TP17
CH7
1
TP22
REF+
1
C2
4.7uF
6.3V
R8
TP18
REF67-
1
R5
10K
TP19
REF67+
1
TP20
Vcc
1
center pad
bottom
U1
LTC2447UHF
13
12
1
5
6
7
8
9
10
15
16
4
3
2
11
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
CH3
CH2
GND
GND
GND
COM
CH0
CH1
REF01-
REF23+
CH4
GND
EXT
BUSY
REF01+
REF23-
CH5
REF45-
REF45+
CH6
CH7
REF67-
REF67+
MUXOUTP
ADCINP
ADCINN
MUXOUTN
VCC
REF+
REF-
GND
GND
GND
SDI
FO
CS
SDO
SCK
GND
R7
100
C8
10uF
6.3V
R10
R8-R10 Are 4.99K 1%
C9
4.7uF
6.3V
C19
1uF
C10
0.01uF
D1
BAT54S
1
3
2
R6
(Opt.)
C20
1uF
C7
.01uF
U4
24LC025
1
6 3
45
27
8
A0
SCL A2
VSSSDA
A1WP
VCC
R2
0
TP13
SMT Pad
1
C4
0.1uF
R12
50
TP26
GND
1
JP1
AMP V+
1
2
3
-
+
U2B
LT1368CS8
7
6
5
C15
0.1uF
TP27
GND
1
C17
0.1uF
C11
0.1uF
C13
0.01uF
C5
1uF
TP2
CH1
1
C12
4.7uF
6.3V
JP4
COM
1
2
3
C6
0.1uF
TP23
GND
1
D2
BAT54S
1
3
2
JP3
REF+
1
2
3
TP3
REF01-
1
C23
1uF
U3
NC7SZ157P6X
1 6
3 4
52
I1 S
IO Z
VCCGND
TP24
REF-
1
C21
1uF
-
+
U2A
LT1368CS8
1
2
3
4 8
TP29
SMT Pad
1
TP4
REF01+
1
C18
1uF
C14
0.1uF
TP9
AMP V-
1
TP5
CH2
1
U6
NL17SZ74US
2
4
6
3
7
8
5
1
D
GND
CLR
Q
PR
VCC
Q
CP
TP7
AMP V+
1
TP6
CH3
1
JP6
Trig. Mode
1
2
3
R1
0
TP8
REF23-
1
TP25
Pwr GND
1
C16
0.1uF
TP28
SMT Pad
1
J2
HD2X7
1
3
5
7
9
11
13
2
4
6
8
10
12
14
+
+
+
+
+
+
+
+
+
+
+
+
+
+
TP1
CH0
1
TP10
REF23+
1
TP21
COM
1
TP11
CH4
1
C1
1uF
TP12
CH5
1
TP14
REF45-
1
JP5
REF-
1
2
3
U5
LT1236ACS8-5
2
4
6
VIN
GND
VOUT
JP7
(Opt.)
1 2
TP15
REF45+
1
C3
0.01uF
R11
10K
TP16
CH6
1
C22
1uF