Datasheet

LTC2498
3
2498ff
electrical characteristics (norMal speeD)
The l denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4)
electrical characteristics (2x speeD)
The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) 0.1V ≤ V
REF
≤ V
CC
, –FS ≤ V
IN
≤ +FS (Note 5) 24 Bits
Integral Nonlinearity 5V ≤ V
CC
≤ 5.5V, V
REF
= 5V, V
IN(CM)
= 2.5V (Note 6)
2.7V ≤ V
CC
≤5.5V, V
REF
= 2.5V, V
IN(CM)
= 1.2V (Note 6)
l
2
1
10 ppm of V
REF
ppm of V
REF
Offset Error 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 14)
l
0.5 2 mV
Offset Error Drift 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
100 nV/°C
Positive Full-Scale Error 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.75V
REF
, IN
–
= 0.25V
REF
l
25 ppm of V
REF
Positive Full-Scale Error Drift 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.75V
REF
, IN
–
= 0.25V
REF
0.1 ppm of V
REF
/°C
Negative Full-Scale Error 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.25V
REF
, IN
–
= 0.75V
REF
l
25 ppm of V
REF
Negative Full-Scale Error Drift 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.25V
REF
, IN
–
= 0.75V
REF
0.1 ppm of V
REF
/°C
Output Noise 5V ≤ V
CC
≤ 2.5V, V
REF
= 5V, GND ≤ IN
+
= IN
–
≤ V
CC
0.85 µV
RMS
converter characteristics
The l denotes the 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 ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
l
140 dB
Input Common Mode Rejection 60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
l
140 dB
Input Common Mode Rejection 50Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
l
140 dB
Input Normal Mode Rejection 50Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 7)
l
110 120 dB
Input Normal Mode Rejection 60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 8)
l
110 120 dB
Input Normal Mode Rejection 50Hz/60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 9)
l
87 dB
Reference Common Mode Rejection DC 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
l
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
PARAMETER CONDITIONS MIN TYP MAX UNITS
Total Unadjusted Error 5V ≤ V
CC
≤ 5.5V, V
REF
= 2.5V, V
IN(CM)
= 1.25V
5V ≤ V
CC
≤ 5.5V, V
REF
= 5V, V
IN(CM)
= 2.5V
2.7V ≤ V
CC
≤ 5.5V, V
REF
= 2.5V, V
IN(CM)
= 1.25V
15
15
15
ppm of V
REF
ppm of V
REF
ppm of V
REF
Output Noise 5.5V < V
CC
< 2.7V, 2.5V ≤ V
REF
≤ V
CC
,
GND ≤ IN
+
= IN
–
≤ V
CC
(Note 13)
0.6 µV
RMS
Internal PTAT Signal T
A
= 27°C (Note 5) 27.8 28.0 28.2 mV
Internal PTAT Temperature Coefficient 93.5 µV/°C
analog input anD reFerence
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications 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