Datasheet

LTC2488
3
2488fa
CONVERTER CHARACTERISTICS
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Common Mode Rejection DC 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
●
140 dB
Input Common Mode Rejection 50Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
●
140 dB
Input Common Mode Rejection 60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
●
140 dB
Input Normal Mode Rejection 50Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 7)
●
110 120 dB
Input Normal Mode Rejection 60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 8)
●
110 120 dB
Input Normal Mode Rejection 50Hz/60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 9)
●
87 dB
Reference Common Mode Rejection DC 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
●
120 140 dB
Power Supply Rejection DC V
REF
= 2.5V, IN
+
= IN
–
= GND 120 dB
Power Supply Rejection, 50Hz ±2% V
REF
= 2.5V, IN
+
= IN
–
= GND (Notes 7, 9) 120 dB
Power Supply Rejection, 60Hz ±2% V
REF
= 2.5V, IN
+
= IN
–
= GND (Notes 8, 9) 120 dB
ANALOG INPUT AND REFERENCE
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IN
+
Absolute/Common Mode IN
+
Voltage
(IN
+
Corresponds to the Selected Positive Input Channel)
GND – 0.3V V
CC
+ 0.3V V
IN
–
Absolute/Common Mode IN
–
Voltage
(IN
–
Corresponds to the Selected Negative Input Channel)
GND – 0.3V V
CC
+ 0.3V V
V
IN
Input Differential Voltage Range (IN
+
– IN
–
)
●
–FS +FS V
FS Full Scale of the Differential Input (IN
+
– IN
–
)
●
0.5V
REF
V
LSB Least Signifi cant Bit of the Output Code
●
FS/2
16
REF
+
Absolute/Common Mode REF
+
Voltage
●
0.1 V
CC
V
REF
–
Absolute/Common Mode REF
–
Voltage
●
GND REF
+
– 0.1V V
V
REF
Reference Voltage Range (REF
+
– REF
–
)
●
0.1 V
CC
V
C
S(IN+)
IN
+
Sampling Capacitance 11 pF
C
S(IN–)
IN
–
Sampling Capacitance 11 pF
C
S(VREF)
V
REF
Sampling Capacitance 11 pF
I
DC_LEAK(IN
+
)
IN
+
DC Leakage Current Sleep Mode, IN
+
= GND
●
–10 1 10 nA
I
DC_LEAK(IN
–
)
IN
–
DC Leakage Current Sleep Mode, IN
–
= GND
●
–10 1 10 nA
I
DC_LEAK(REF
+
)
REF
+
DC Leakage Current Sleep Mode, REF
+
= V
CC
●
–100 1 100 nA
I
DC_LEAK(REF
–
)
REF
–
DC Leakage Current Sleep Mode, REF
–
= GND
●
–100 1 100 nA
t
OPEN
MUX Break-Before-Make 50 ns
QIRR MUX Off Isolation V
IN
= 2V
P-P
DC to 1.8MHz 120 dB