LTC2641/LTC2642
ELECTRICAL CHARACTERISTICS
SYMBOL
I
IN
C
IN
V
H
Power Supply
V
DD
I
DD
P
D
Supply Voltage
Supply Current, V
DD
Power Dissipation
Digital Inputs = 0V or V
DD
Digital Inputs = 0V or V
DD
, V
DD
= 5V
Digital Inputs = 0V or V
DD
, V
DD
= 3V
●
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 3V or 5V, V
REF
= 2.5V, C
L
= 10pF, GND = 0, R
L
= ∞ unless
otherwise specified.
PARAMETER
Digital Input Current
Digital Input Capacitance
Hysteresis Voltage
2.7
120
0.60
0.36
CONDITIONS
V
IN
= GND to V
CC
(Note 6)
●
●
MIN
TYP
3
0.15
MAX
±1
10
UNITS
μA
pF
V
5.5
200
V
μA
mW
mW
TIMING CHARACTERISTICS
SYMBOL
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
f
SCLK
PARAMETER
DIN Valid to SCLK Setup Time
DIN Valid to SCLK Hold Time
SCLK Pulse Width High
SCLK Pulse Width Low
⎯
CS Pulse High Width
⎯
LSB SCLK High to
⎯
C
⎯
S High
⎯
CS Low to SCLK High
⎯
⎯
C
⎯
S High to SCLK Positive Edge
⎯
CLR Pulse Width Low
⎯ ⎯
The
●
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
DD
= 3V or 5V, V
REF
= 2.5V, C
L
= 10pF, GND = 0, R
L
= ∞ unless otherwise specified.
CONDITIONS
●
●
●
●
●
●
●
●
●
●
MIN
10
0
9
9
10
8
8
8
15
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
SCLK Frequency
V
DD
High to
⎯
C
⎯
S Low (Power-Up Delay)
50% Duty Cycle
50
30
MHz
μs
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:
Continuous operation above the specified maximum operating
junction temperature may impair device reliability.
Note 3:
LTC2641-16/LTC2642-16 ±1LSB = ±0.0015% = ±15.3ppm of full
scale. LTC2641-14/LTC2642-14 ±1LSB = ±0.006% = ±61ppm of full scale.
LTC2641-12/LTC2642-12 ±1LSB = ±0.024% = ±244ppm of full scale.
Note 4:
R
OUT
tolerance is typically ±20%.
Note 5:
Reference input resistance is code dependent. Minimum is at
871Chex (34,588) in unipolar mode and at 671Chex (26, 396) in bipolar
mode.
Note 6:
Guaranteed by design and not production tested.
Note 7:
Guaranteed by gain error and offset error testing, not production
tested.
26412f
5
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