Datasheet
LTC2444/LTC2445/
LTC2448/LTC2449
2
2444589fc
For more information www.linear.com/LTC2444
pin conFiguraTion
absoluTe MaxiMuM raTings
Supply Voltage (V
CC
) to GND ....................... –0.3V to 6V
Analog Input Pins Voltage
to GND ......................................–0.3V to (V
CC
+ 0.3V)
Reference Input Pins Voltage
to GND ......................................–0.3V to (V
CC
+ 0.3V)
Digital Input Voltage to GND .........–0.3V to (V
CC
+ 0.3V)
Digital Output Voltage to GND ....... –0.3V to (V
CC
+ 0.3V)
(Notes 1, 2)
LTC2444 LTC2445
13 14 15 16
TOP VIEW
UHF PACKAGE
38-LEAD (5mm × 7mm) PLASTIC QFN
17 18 19
38 37 36 35 34 33 32
24
25
26
27
28
29
30
31
8
7
6
5
4
3
2
1GND
BUSY
EXT
GND
GND
GND
COM
NC
CH0
CH1
NC
NC
GND
REF
–
REF
+
V
CC
NC
NC
NC
NC
NC
CH7
CH6
NC
SCK
SDO
CS
F
O
SDI
GND
GND
CH2
CH3
NC
NC
CH4
CH5
NC
23
22
21
20
9
10
11
12
39
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
13 14 15 16
TOP VIEW
UHF PACKAGE
38-LEAD (5mm × 7mm) PLASTIC QFN
17 18 19
38 37 36 35 34 33 32
24
25
26
27
28
29
30
31
8
7
6
5
4
3
2
1GND
BUSY
EXT
GND
GND
GND
COM
NC
CH0
CH1
NC
NC
GND
REF
–
REF
+
V
CC
MUXOUTN
ADCINN
ADCINP
MUXOUTP
NC
CH7
CH6
NC
SCK
SDO
CS
F
O
SDI
GND
GND
CH2
CH3
NC
NC
CH4
CH5
NC
23
22
21
20
9
10
11
12
39
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
LTC2448 LTC2449
13 14 15 16
TOP VIEW
UHF PACKAGE
38-LEAD (5mm × 7mm) PLASTIC QFN
17 18 19
38
39
37 36 35 34 33 32
24
25
26
27
28
29
30
31
8
7
6
5
4
3
2
1GND
BUSY
EXT
GND
GND
GND
COM
CH0
CH1
CH2
CH3
CH4
GND
REF
–
REF
+
V
CC
NC
NC
NC
NC
CH15
CH14
CH13
CH12
SCK
SDO
CS
F
O
SDI
GND
GND
CH5
CH6
CH7
CH8
CH9
CH10
CH11
23
22
21
20
9
10
11
12
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
13 14 15 16
TOP VIEW
UHF PACKAGE
38-LEAD (5mm × 7mm) PLASTIC QFN
17 18 19
38 37 36 35 34 33 32
24
25
26
27
28
39
29
30
31
8
7
6
5
4
3
2
1GND
BUSY
EXT
GND
GND
GND
COM
CH0
CH1
CH2
CH3
CH4
GND
REF
–
REF
+
V
CC
MUXOUTN
ADCINN
ADCINP
MUXOUTP
CH15
CH14
CH13
CH12
SCK
SDO
CS
F
O
SDI
GND
GND
CH5
CH6
CH7
CH8
CH9
CH10
CH11
23
22
21
20
9
10
11
12
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
Operating Temperature Range
LTC2444C/LTC2445C/
LTC2448C/LTC2449C ............................... 0°C to 70°C
LTC2444I/LTC2445I/
LTC2448I/LTC2449I ............................. –40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C