Datasheet
LTC2470/LTC2472
4
24702fb
For more information www.linear.com/LTC2470
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
CONV1
Conversion Time SPD = 0
l
3.2 4 4.8 ms
t
CONV2
Conversion Time SPD = 1
l
0.8 1 1.2 ms
f
SCK
SCK Frequency Range
l
2 MHz
t
lSCK
SCK Low Period (Note 7)
l
250 ns
t
hSCK
SCK High Period (Note 7)
l
250 ns
t
1
CS Falling Edge to SDO Low Z (Note 7)
l
0 100 ns
t
2
CS Rising Edge to SDO High Z (Note 7)
l
0 100 ns
t
3
CS Falling Edge to SCK Falling Edge (Note 7)
l
100 ns
t
4
SDI Setup Before SCK↑
(Notes 3, 7)
l
100 ns
t
5
SDI Hold After SCK↑
(Notes 3, 7)
l
100 ns
t
KQ
SCK Falling Edge to SDO Valid (Note 7)
l
0 100 ns
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2. All voltage values are with respect to GND. V
CC
= 2.7V to 5.5V
unless otherwise specified.
V
REFCM
= V
REF
/2, FS = V
REF
,
–V
REF
≤ V
IN
≤ V
REF
V
IN
= V
IN
+
– V
IN
–
, V
INCM
= (V
IN
+
+ V
IN
–
)/2. (LTC2472)
Note 3. Guaranteed by design, not subject to test.
Note 4. Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
Note 5: CS = V
CC
. A positive current is flowing into the DUT pin.
Note 6: SCK = V
CC
or GND. SDO is high impedance.
Note 7: See Figure 5.
Note 8: Input sampling current is the average input current drawn from
the input sampling network while the LTC2470/LTC2472 is actively
sampling the input.
Note 9: Temperature coefficient is calculated by dividing the maximum
change in output voltage by the specified temperature range.
TiMing characTerisTics
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage
l
V
CC
– 0.3 V
V
IL
Low Level Input Voltage
l
0.3 V
I
IN
Digital Input Current
l
–10 10 µA
C
IN
Digital Input Capacitance 10 pF
V
OH
High Level Output Voltage I
O
= –800µA
l
V
CC
– 0.5 V
V
OL
Low Level Output Voltage I
O
= 1.6mA
l
0.4 V
I
OZ
Hi-Z Output Leakage Current
l
–10 10 µA
DigiTal inpuTs anD DigiTal ouTpuTs
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage
l
2.7 5.5 V
I
CC
Supply Current
Conversion
Conversion
Nap
Sleep
CS = GND (Note 6) LTC2472
CS = GND (Note 6) LTC2470
CS = V
CC
(Note 6)
CS = V
CC
(Note 6)
l
l
l
l
3.5
2.5
800
0.2
5
4
1500
2
mA
mA
µA
µA
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C.
power requireMenTs