Datasheet

LTC2440
3
2440fd
ANALOG INPUT AND REFERENCE
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 3.5 pF
C
S(IN
–
)
IN
–
Sampling Capacitance 3.5 pF
C
S(REF
+
)
REF
+
Sampling Capacitance 3.5 pF
C
S(REF
–
)
REF
–
Sampling Capacitance 3.5 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
–100 10 100 nA
I
SAMPLE(IN
+
, IN
–
,
REF
+
, REF
–
)
Average Input/Reference Current During
Sampling
Varies, See Applications Section
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 3)
DIGITAL INPUTS AND DIGITAL OUTPUTS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
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
IN
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
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
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
The l denotes the specifi cations which apply over the full
operating temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 3)