LTC2637 Datasheet, PDF (6/28 Pages) Linear Technology – Mobile Communications

LTC2637
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 2.7V to 5.5V, V_OUT unloaded unless otherwise specified.
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
Resistance
l
1
V_CC
V
l 120
160
200
kΩ
Capacitance
12
pF
I_REF
Reference Current, Power-Down Mode
Reference Output
DAC Powered Down
l
0.005
1.5
µA
Output Voltage
l 1.24
1.25
1.26
V
Reference Temperature Coefficient
±10
ppm/°C
Output Impedance
0.5
kΩ
Capacitive Load Driving
10
µF
Short Circuit Current
Digital I/O
V_CC = 5.5V; REF Shorted to GND
2.5
mA
V_IL
V_IH
V_IL(CAn)
Low Level Input Voltage (SDA and SCL)
High Level Input Voltage (SDA and SCL)
Low Level Input Voltage on CAn
(n = 0, 1, 2)
(Note 14)
(Note 11)
See Test Circuit 1
l –0.5
l 0.7V_CC
l
0.3V_CC
V
V
0.15V_CC
V
V_IH(CAn) High Level Input Voltage on CAn
See Test Circuit 1
l 0.85V_CC
V
(n = 0, 1, 2)
R_INH
Resistance from CAn (n=0, 1,2)
See Test Circuit 2
l
10
kΩ
to V_CC to Set CAn = V_CC
R_INL
Resistance from CAn (n=0, 1,2)
See Test Circuit 2
l
10
kΩ
to GND to Set CAn = GND
R_INF
Resistance from CAn (n=0, 1,2)
to V_CC or GND to Set CAn = Float
V_OL
Low Level Output Voltage
t_OF
Output Fall Time
t_SP
Pulse Width of Spikes Suppressed
by Input Filter
See Test Circuit 2
Sink Current = 3mA
V_O = V_IH(MIN) to V_O = V_IL(MAX),
C_B = 10pF to 400pF (Note 12)
l
2
l
0
l 20 + 0.1C_B
l
0
MΩ
0.4
V
250
ns
50
ns
I_IN
Input Leakage
0.1V_CC ≤ V_IN ≤ 0.9V_CC
l
C_IN
I/O Pin Capacitance
(Note 8)
l
C_B
Capacitive Load for Each Bus Line
l
C_CAn
External Capacitive Load on Address
l
Pin CAn (n=0, 1,2)
±1
µA
10
pF
400
pF
10
pF
2637fa