Datasheet

LTC2444/LTC2445/
LTC2448/LTC2449
4
2444589fc
For more information www.linear.com/LTC2444
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IN
+
Absolute/Common Mode IN
+
Voltage
l
GND – 0.3V V
CC
+ 0.3V V
IN
–
Absolute/Common Mode IN
–
Voltage
l
GND – 0.3V V
CC
+ 0.3V V
V
IN
Input Differential Voltage Range
(IN
+
– IN
–
)
l
–V
REF
/2 V
REF
/2 V
REF
+
Absolute/Common Mode REF
+
Voltage
l
0.1 V
CC
V
REF
–
Absolute/Common Mode REF
–
Voltage
l
GND V
CC
– 0.1V V
V
REF
Reference Differential Voltage Range
(REF
+
– REF
–
)
l
0.1 V
CC
V
C
S(IN
+
)
IN
+
Sampling Capacitance 2 pF
C
S(IN
–
)
IN
–
Sampling Capacitance 2 pF
C
S(REF
+
)
REF
+
Sampling Capacitance 2 pF
C
S(REF
–
)
REF
–
Sampling Capacitance 2 pF
I
DC_LEAK(IN
+
, IN
–
,
REF
+
, REF
–
)
Leakage Current, Inputs and Reference CS = V
CC
, IN
+
= GND, IN
–
= GND,
REF
+
= 5V, REF
–
= GND
l
–15 1 15 nA
I
SAMPLE(IN
+
, IN
–
,
REF
+
, REF
–
)
Average Input/Reference Current
During Sampling
Varies, See Applications Section nA
t
OPEN
MUX Break-Before-Make 50 ns
QIRR MUX Off Isolation V
IN
= 2V
P-P
DC to 1.8MHz 120 dB
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage, CS, F
O
, SDI 4.5V ≤ V
CC
≤ 5.5V
l
2.5 V
V
IL
Low Level Input Voltage, CS, F
O
, SDI 4.5V ≤ V
CC
≤ 5.5V
l
0.8 V
V
IH
High Level Input Voltage SCK 4.5V ≤ V
CC
≤ 5.5V (Note 8)
l
2.5 V
V
IL
Low Level Input Voltage SCK 4.5V ≤ V
CC
≤ 5.5V (Note 8)
l
0.8 V
I
IN
Digital Input Current, CS, F
O
, EXT, SDI 0V ≤ V
IN
≤ V
CC
l
–10 10 µA
I
IN
Digital Input Current, SCK 0V ≤ V
IN
≤ V
CC
(Note 8)
l
–10 10 µA
C
IN
Digital Input Capacitance, CS, F
O
, SDI 10 pF
C
IN
Digital Input Capacitance, SCK (Note 8) 10 pF
V
OH
High Level Output Voltage, SDO, BUSY I
O
= –800µA
l
V
CC
– 0.5V V
V
OL
Low Level Output Voltage, SDO, BUSY I
O
= 1.6mA
l
0.4V V
V
OH
High Level Output Voltage, SCK I
O
= –800µA (Note 9)
l
V
CC
– 0.5V V
V
OL
Low Level Output Voltage, SCK I
O
= 1.6mA (Note 9)
l
0.4V V
I
OZ
Hi-Z Output Leakage, SDO
l
–10 10 µA
analog inpuT anD reFerence
DigiTal inpuTs anD DigiTal ouTpuTs
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage
l
4.5 5.5 V
I
CC
Supply Current
Conversion Mode
Sleep Mode
CS = 0V (Note 7)
CS = V
CC
(Note 7)
l
l
8
8
11
30
mA
µA
power requireMenTs
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 3)