Datasheet

LTC2240-12
4
224012fd
INTERNAL REFERENCE CHARACTERISTICS
(Note 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CM
Output Voltage I
OUT
= 0 1.225 1.25 1.275 V
V
CM
Output Tempco ±35 ppm/°C
V
CM
Line Regulation 2.375V < V
DD
< 2.625V 3 mV/V
V
CM
Output Resistance –1mA < I
OUT
< 1mA 2 Ω
DIGITAL INPUTS AND DIGITAL OUTPUTS
The l denotes the specifi cations which apply over the
full operating temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ENCODE INPUTS (ENC
+
, ENC
–
)
V
ID
Differential Input Voltage (Note 7)
l
0.2 V
V
ICM
Common Mode Input Voltage Internally Set
Externally Set (Note 7)
l
1.2
1.5
1.5 2.0
V
V
R
IN
Input Resistance 4.8
kΩ
C
IN
Input Capacitance (Note 7) 2 pF
LOGIC INPUTS (OE, SHDN)
V
IH
High Level Input Voltage V
DD
= 2.5V
l
1.7 V
V
IL
Low Level Input Voltage V
DD
= 2.5V
l
0.7 V
I
IN
Input Current V
IN
= 0V to V
DD
l
–10 10 μA
C
IN
Input Capacitance (Note 7) 3 pF
LOGIC OUTPUTS (CMOS MODE)
OV
DD
= 2.5V
C
OZ
Hi-Z Output Capacitance OE = High (Note 7) 3 pF
I
SOURCE
Output Source Current V
OUT
= 0V 37 mA
I
SINK
Output Sink Current V
OUT
= 2.5V 23 mA
V
OH
High Level Output Voltage I
O
= –10μA
I
O
= –500μA
2.495
2.45
V
V
V
OL
Low Level Output Voltage 0.005
0.07
V
V
OV
DD
= 1.8V
V
OH
High Level Output Voltage I
O
= –500μA 1.75 V
V
OL
Low Level Output Voltage I
O
= 500μA 0.07 V