Datasheet

LTC2637
6
2637fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded unless otherwise specifi ed.
LTC2637-LMI12/ LTC2637-LMI10/ LTC2637-LMI8/ LTC2637-LMX12/ LTC2637-LMX10/ LTC2637-LMX8/ LTC2637-LZ12/
LTC2637-LZ10/ LTC2637-LZ8 (V
FS
= 2.5V)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference Input
Input Voltage Range
l
1V
CC
V
Resistance
l
120 160 200 k
Capacitance 12 pF
I
REF
Reference Current, Power-Down Mode DAC Powered Down
l
0.005 1.5 µA
Reference Output
Output Voltage
l
1.24 1.25 1.26 V
Reference Temperature Coeffi cient
±10
ppm/°C
Output Impedance 0.5 k
Capacitive Load Driving 10 µF
Short Circuit Current V
CC
= 5.5V; REF Shorted to GND 2.5 mA
Digital I/O
V
IL
Low Level Input Voltage (SDA and SCL) (Note 14)
l
–0.5 0.3V
CC
V
V
IH
High Level Input Voltage (SDA and SCL) (Note 11)
l
0.7V
CC
V
V
IL(CAn)
Low Level Input Voltage on CAn
(n = 0, 1, 2)
See Test Circuit 1
l
0.15V
CC
V
V
IH(CAn)
High Level Input Voltage on CAn
(n = 0, 1, 2)
See Test Circuit 1
l
0.85V
CC
V
R
INH
Resistance from CAn (n=0, 1,2)
to V
CC
to Set CAn = V
CC
See Test Circuit 2
l
10 k
R
INL
Resistance from CAn (n=0, 1,2)
to GND to Set CAn = GND
See Test Circuit 2
l
10 k
R
INF
Resistance from CAn (n=0, 1,2)
to V
CC
or GND to Set CAn = Float
See Test Circuit 2
l
2M
V
OL
Low Level Output Voltage Sink Current = 3mA
l
0 0.4 V
t
OF
Output Fall Time V
O
= V
IH(MIN)
to V
O
= V
IL(MAX)
,
C
B
= 10pF to 400pF (Note 12)
l
20 + 0.1C
B
250 ns
t
SP
Pulse Width of Spikes Suppressed
by Input Filter
l
050ns
I
IN
Input Leakage 0.1V
CC
≤ V
IN
≤ 0.9V
CC
l
±1 µA
C
IN
I/O Pin Capacitance (Note 8)
l
10 pF
C
B
Capacitive Load for Each Bus Line
l
400 pF
C
CAn
External Capacitive Load on Address
Pin CAn (n=0, 1,2)
l
10 pF