LTC2487
analog inpuT anD reFerence The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T = 25°C. (Note 3)
A
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
+
IN
Absolute/Common Mode IN Voltage
GND – 0.3V
V
V
+ 0.3V
V
CC
+
(IN Corresponds to the Selected Positive Input Channel)
–
–
IN
Absolute/Common Mode IN Voltage
GND – 0.3V
–FS
+ 0.3V
+FS
V
CC
–
(IN Corresponds to the Selected Negative Input Channel)
+
–
●
●
●
●
●
●
V
Input Differential Voltage Range (IN – IN )
V
V
IN
+
–
FS
Full Scale of the Differential Input (IN – IN )
0.5V /Gain
REF
16
LSB
Least Significant Bit of the Output Code
FS/2
+
+
REF
REF
Absolute/Common Mode REF Voltage
0.1
GND
0.1
V
V
V
CC
–
–
+
Absolute/Common Mode REF Voltage
REF – 0.1V
+
–
V
Reference Voltage Range (REF – REF )
V
V
REF
CC
+
+
CS(IN )
IN Sampling Capacitance
11
11
11
1
pF
pF
pF
nA
nA
nA
nA
ns
dB
–
–
CS(IN )
IN Sampling Capacitance
CS(V
)
V
Sampling Capacitance
REF
REF
+
+
+
●
●
●
●
I
I
I
I
t
IN DC Leakage Current
Sleep Mode, IN = GND
–10
–10
10
DC_LEAK(IN )
–
–
–
IN DC Leakage Current
Sleep Mode, IN = GND
1
10
DC_LEAK(IN )
+
+
+
REF DC Leakage Current
Sleep Mode, REF = V
–100
–100
1
100
100
DC_LEAK(REF )
CC
–
–
–
REF DC Leakage Current
Sleep Mode, REF = GND
1
DC_LEAK(REF )
MUX Break-Before-Make
MUX Off Isolation
50
120
OPEN
QIRR
V = 2V DC to 1.8MHz
IN P-P
i2c inpuTs anD DigiTal ouTpuTs
The
●
denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T = 25°C. (Note 3)
A
SYMBOL
PARAMETER
CONDITIONS
MIN
0.7V
TYP
MAX
UNITS
●
●
●
●
●
V
V
V
V
High Level Input Voltage
V
V
IH
CC
Low Level Input Voltage
0.3V
IL
CC
Low Level Input Voltage for Address Pins CA0, CA1
High Level Input Voltage for Address Pins CA0, CA1
0.05V
V
IHA
ILA
CC
0.95V
V
CC
R
INH
R
INL
R
INF
Resistance from CA0, CA1 to V to Set Chip Address
Bit to 1
10
10
kW
CC
●
●
Resistance from CA0, CA1 to GND to Set Chip Address
Bit to 0
kW
Resistance from CA0, CA1 to GND or V to Set Chip
Address Bit to Float
2
MW
CC
●
●
●
●
I
Digital Input Current
–10
10
µA
V
I
V
V
Hysteresis of Schmitt Trigger Inputs
Low Level Output Voltage (SDA)
(Note 5)
I = 3mA
0.05V
HYS
OL
CC
0.4
V
t
OF
Output Fall Time V
to V
Bus Load C 10pF to
400pF (Note 14)
20 + 0.1C
B
250
ns
IH(MIN)
IL(MAX)
B
●
●
I
Input Leakage
0.1V ≤ V ≤ V
CC
1
µA
pF
IN
CC
IN
C
External Capacitative Load on Chip Address Pins (CA0, CA1)
for Valid Float
10
CAX
2487fa
ꢃ
Linear [ Linear ]
