LTC2452
4
2452fd
The l denotes the specifications which apply over the full operating temperature
range,otherwise specifications are at TA = 25°C.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tCONV
Conversion Time
l
13
16.6
23
ms
fSCK
SCK Frequency Range
l
2
MHz
tlSCK
SCK Low Period
l
250
ns
thSCK
SCK High Period
l
250
ns
t1
CS Falling Edge to SDO Low-Z
(Notes 7, 8)
l
0
100
ns
t2
CS Rising Edge to SDO Hi-Z
(Notes 7, 8)
l
0
100
ns
t3
CS Falling Edge to SCK Falling Edge
l
100
ns
tKQ
SCK Falling Edge to SDO Valid
(Note 7)
l
0
100
ns
Typical perForMance characTerisTics
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. VCC = 2.7V to 5.5V
unless otherwise specified.
VREFCM = VREF/2, FS = VREF
VIN = VIN+ – VIN–, –VREF ≤ VIN ≤ VREF; VINCM = (VIN+ + VIN–)/2.
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.
Guaranteed by design and test correlation.
Note 5: CS = VCC. A positive current is flowing into the DUT pin.
Note 6: SCK = VCC or GND. SDO is high impedance.
Note 7: See Figure 4.
Note 8: See Figure 5.
Note 9: Input sampling current is the average input current drawn from the
input sampling network while the LTC2452 is actively sampling the input.
Note 10: A positive current is flowing into the DUT pin.
TiMing characTerisTics
Integral Nonlinearity, VCC = 5V
Integral Nonlinearity, VCC = 3V
Maximum INL vs Temperature
(TA = 25°C, unless otherwise noted)
DIFFERENTIAL INPUT VOLTAGE (V)
–5
INL
(LSB)
1
3
2452 G01
–1
0
2
–2
–3
–1
–2
–3
–4
1
2
3
4
0
5
TA = –45°C, 25°C
TA = 90°C
DIFFERENTIAL INPUT VOLTAGE (V)
–3
INL
(LSB)
1
3
2452 G02
–1
0
2
–2
–3
–1
–2
1
2
0
3
TA = –45°C, 25°C, 90°C
TEMPERATURE (°C)
–50
INL
(LSB)
1
3
2452 G03
–1
0
2
–2
–3
–25
25
50
75
0
100
VCC = VREF = 5V, 4.1V, 3V