ltc2493 Linear Technology Corporation, ltc2493 Datasheet - Page 4

• Manufacturer Part Number: ltc2493
• Description: 24-bit 2-/4-channel Delta Sigma Adc With Easy Drive Input Current Cancellation And I2c Interface
• Manufacturer: Linear Technology Corporation

analog inpuT anD reFerence
i
LTC2493
temperature range, otherwise specifications are at T
SYMBOL
IN
IN
V
FS
LSB
REF
REF
V
CS(IN
CS(IN
CS(V
I
I
I
I
t
QIRR
operating temperature range, otherwise specifications are at T
SYMBOL
V
V
V
V
R
R
R
I
V
V
t
I
C

DC_LEAK(IN
DC_LEAK(IN
DC_LEAK(REF
DC_LEAK(REF
OPEN
I
OF
IN
2
IN
REF
IH
IL
IHA
ILA
HYS
OL
CAX
INH
INL
INF
+
–
c inpuTs anD DigiTal ouTpuTs
+
–
REF
+
–
)
)
)
+
–
)
)
+
–
)
)
PARAMETER
High Level Input Voltage
Low Level Input Voltage
Low Level Input Voltage for Address Pins CA0, CA1
High Level Input Voltage for Address Pins CA0, CA1
Resistance from CA0, CA1 to V
Bit to 1
Resistance from CA0, CA1 to GND to Set Chip Address
Bit to 0
Resistance from CA0, CA1 to GND or V
Address Bit to Float
Digital Input Current (f
Hysteresis of Schmitt Trigger Inputs
Low Level Output Voltage (SDA)
Output Fall Time V
Input Leakage (SDA, SCL)
External Capacitative Load on Chip Address Pins (CA0,
CA1) for Valid Float
PARAMETER
Absolute/Common Mode IN
(IN
Absolute/Common Mode IN
(IN
Input Differential Voltage Range (IN
Full Scale of the Differential Input (IN
Least Significant Bit of the Output Code
Absolute/Common Mode REF
Absolute/Common Mode REF
Reference Voltage Range (REF
IN
IN
V
IN
IN
REF
REF
MUX Break-Before-Make
MUX Off Isolation
REF
+
–
+
–
+
–
Sampling Capacitance
Sampling Capacitance
DC Leakage Current
DC Leakage Current
+
–
Corresponds to the Selected Positive Input Channel)
Corresponds to the Selected Negative Input Channel)
Sampling Capacitance
DC Leakage Current
DC Leakage Current
IH(MIN)
O
)
to V
+
–
Voltage
Voltage
+
–
IL(MAX)
+
CC
Voltage
Voltage
– REF
to Set Chip Address
+
+
– IN
–
– IN
)
CC
–
to Set Chip
)
–
A
)
= 25°C. (Note 3)
A
The
CONDITIONS
Sleep Mode, IN
Sleep Mode, IN
Sleep Mode, REF
Sleep Mode, REF
V
= 25°C. (Note 3)
CONDITIONS
(Note 5)
I = 3mA
Bus Load C
400pF (Note 14)
0.1V
IN
= 2V
●
The
CC
denotes the specifications which apply over the full operating
P-P
≤ V
●
denotes the specifications which apply over the full
IN
DC to 1.8MHz
B
10pF to
≤ 0.9V
+
–
= GND
= GND
+
–
= V
= GND
CC
CC
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
20 + 0.1C
0.95V
0.05V
GND – 0.3V
GND – 0.3V
0.7V
MIN
–10
0.5V
FS/2
2
–100
–100
GND
MIN
–FS
–10
–10
0.1
0.1
CC
CC
CC
REF
24
B
TYP
TYP
120
11
11
11
50
1
1
1
1
REF
0.05V
V
V
0.3V
MAX
CC
CC
250
0.4
10
10
10
10
1
MAX
+
+FS
V
V
100
100
10
10
+ 0.3V
+ 0.3V
CC
CC
– 0.1V
CC
CC
UNITS
UNITS
2493fa
MW
kW
kW
nA
nA
nA
nA
dB
µA
µA
pF
pF
pF
ns
ns
pF
V
V
V
V
V
V
V
V
V
V
V
V
V