Datasheet

LTC2609/LTC2619/LTC2629
20
26091929fb
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.
typical application
Demo Board Schematic—Onboard 20-Bit ADC Measures Key Performance Parameters
V
OUTA
REFA
V
OUTB
REFB
V
OUTC
REFC
V
OUTD
REFD
V
OUTA
REFA
V
OUTB
REFB
V
OUTC
REFC
V
OUTD
REFD
GND
GND
E10
E11
E2
E3
E4
E5
E6
E7
E8
E9
4
3
5
6
13
12
14
15
11
10
7
CA0
CA1
CA2
SDA
SCL
9
8
REFLO GND
V
CC
LTC2609CGN
V
CC
16
C1
0.1µF
JP1 REFLO
EXT
GND
1
REFLO
2
EXT REFLO
V
CC
I
2
C
20-BIT
ADC
8-CHANNEL
MUX
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
ZSSET
CSADC
CSMUX
SCK
CLK
DIN
SD0
23
20
25
19
21
24
CS
SCK
MOSI
MISO
9
10
11
12
13
14
15
17
5
+
–
MUXOUT ADCIN FSSET
LTC2428CG
7 4 3
R8
22Ω
C3
100pF
C7
1µF
6.3V
C4
0.1µF
R5
7.5k
R6
7.5k
R7
7.5k
SPI
BUS
V
CC
GND
6 16 18 22 27 28
26
2609 TA02
1
GND GND GND GND GND GND
F0
V
REF
V
CC
V
CC
2
V
CC
8
C5
0.1µF
DISABLE
ADC
JP2
ON/OFF
A
B
C5
3
1
6
4
2
A
B
C5
3
1
6
4
2
A
B
C5
3
1
6
4
2
A
B
C5
3
1
6
4
2
A
V
REF
5V
REF
4.096V
REF
2.048V
REF
ADC REF
JP7
REFA
JP3
REFB
JP4
REFC
JP5
REFD
JP6
B
C5
3
1
6
4
2
V
IN
NC
5V
REF
C6
0.1µF
V
IN
5
6
6
6
1 2
4
3
V
OUT
NC
GND GND
LT1790ACS6-5
C9
1µF
6.3V
V
IN
NC
4.096V
REF
C8
0.1µF
V
IN
5
1 2
4
3
V
OUT
NC
GND GND
LT1790ACS6-4.096
C11
1µF
6.3V
V
IN
NC
2.048V
REF
C10
0.1µF
V
IN
5
1 2
4
3
V
OUT
NC
GND GND
LT1790ACS6-2.048