Datasheet

LTC2430/LTC2431
3
24301f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IN
+
Absolute/Common Mode IN
+
Voltage ● GND – 0.3V V
CC
+ 0.3V V
IN
–
Absolute/Common Mode IN
–
Voltage ● GND – 0.3V V
CC
+ 0.3V V
V
IN
Input Differential Voltage Range ● –V
REF
/2 V
REF
/2 V
(IN
+
– IN
–
)
REF
+
Absolute/Common Mode REF
+
Voltage ● 0.1 V
CC
V
REF
–
Absolute/Common Mode REF
–
Voltage ● GND V
CC
– 0.1V V
V
REF
Reference Differential Voltage Range ● 0.1 V
CC
V
(REF
+
– REF
–
)
C
S
(IN
+
)IN
+
Sampling Capacitance 1.5 pF
C
S
(IN
–
)IN
–
Sampling Capacitance 1.5 pF
C
S
(REF
+
)REF
+
Sampling Capacitance 1.5 pF
C
S
(REF
–
)REF
–
Sampling Capacitance 1.5 pF
I
DC_LEAK
(IN
+
)IN
+
DC Leakage Current CS = V
CC
, IN
+
= GND ● –10 1 10 nA
I
DC_LEAK
(IN
–
)IN
–
DC Leakage Current CS = V
CC
, IN
–
= V
CC
● –10 1 10 nA
I
DC_LEAK
(REF
+
)REF
+
DC Leakage Current CS = V
CC
, REF
+
= V
CC
● –10 1 10 nA
I
DC_LEAK
(REF
–
)REF
–
DC Leakage Current CS = V
CC
, REF
–
= GND ● –10 1 10 nA
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Common Mode Rejection DC 2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND, ● 110 120 dB
GND ≤ IN
–
= IN
+
≤ 5V (Note 5)
Input Common Mode Rejection 2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND, ● 140 dB
60Hz ±2% GND ≤ IN
–
= IN
+
≤ 5V, (Notes 5, 7)
Input Common Mode Rejection 2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND, ● 140 dB
50Hz ±2% GND ≤ IN
–
= IN
+
≤ 5V, (Notes 5, 8)
Input Normal Mode Rejection (Notes 5, 7) ● 110 140 dB
60Hz ±2%
Input Normal Mode Rejection (Notes 5, 8) ● 110 140 dB
50Hz ±2%
Reference Common Mode 2.5V ≤ REF
+
≤ V
CC
, GND ≤ REF
–
≤ 2.5V, ● 130 140 dB
Rejection DC V
REF
= 2.5V, IN
–
= IN
+
= GND (Note 5)
Power Supply Rejection, DC REF
+
= 2.5V, REF
–
= GND, IN
–
= IN
+
= GND 110 dB
Power Supply Rejection, 60Hz ±2% REF
+
= 2.5V, REF
–
= GND, IN
–
= IN
+
= GND, (Note 7) 120 dB
Power Supply Rejection, 50Hz ±2% REF
+
= 2.5V, REF
–
= GND, IN
–
= IN
+
= GND, (Note 8) 120 dB
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4)
CO VERTER CHARACTERISTICS
U
A ALOG I PUT A D REFERE CE
UU
U
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