Datasheet

LTC2255/LTC2254
4
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DIGITAL I PUTS A D DIGITAL OUTPUTS
UU
The ● denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
I TER AL REFERE CE CHARACTERISTICS
UU U
(Note 4)
POWER REQUIRE E TS
WU
The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 8)
LTC2255 LTC2254
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
DD
Analog Supply Voltage (Note 9) ● 2.85 3 3.4 2.85 3 3.4 V
OV
DD
Output Supply Voltage (Note 9) ● 0.5 3 3.6 0.5 3 3.6 V
IV
DD
Supply Current ● 132 156 107 126 mA
P
DISS
Power Dissipation ● 395 468 320 378 mW
P
SHDN
Shutdown Power SHDN = H, 2 2 mW
OE = H, No CLK
P
NAP
Nap Mode Power SHDN = H, 15 15 mW
OE = L, No CLK
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CM
Output Voltage I
OUT
= 0 1.475 1.500 1.525 V
V
CM
Output Tempco ±25 ppm/°C
V
CM
Line Regulation 2.85V < V
DD
< 3.4V 3 mV/V
V
CM
Output Resistance –1mA < I
OUT
< 1mA 4 Ω
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
LOGIC INPUTS (CLK, OE, SHDN)
V
IH
High Level Input Voltage V
DD
= 3V ● 2V
V
IL
Low Level Input Voltage V
DD
= 3V ● 0.8 V
I
IN
Input Current V
IN
= 0V to V
DD
● –10 10 µA
C
IN
Input Capacitance (Note 7) 3 pF
LOGIC OUTPUTS
OV
DD
= 3V
C
OZ
Hi-Z Output Capacitance OE = High (Note 7) 3 pF
I
SOURCE
Output Source Current V
OUT
= 0V 50 mA
I
SINK
Output Sink Current V
OUT
= 3V 50 mA
V
OH
High Level Output Voltage I
O
= –10µA 2.995 V
I
O
= –200µA ● 2.7 2.99 V
V
OL
Low Level Output Voltage I
O
= 10µA 0.005 V
I
O
= 1.6mA ● 0.09 0.4 V
OV
DD
= 2.5V
V
OH
High Level Output Voltage I
O
= –200µA 2.49 V
V
OL
Low Level Output Voltage I
O
= 1.6mA 0.09 V
OV
DD
= 1.8V
V
OH
High Level Output Voltage I
O
= –200µA 1.79 V
V
OL
Low Level Output Voltage I
O
= 1.6mA 0.09 V