Datasheet

LTC2481
3
2481fc
ELECTRICAL CHARACTERISTICS (2X SPEED)
The l denotes the specifi cations which apply over
the full operating temperature range, otherwise specifi cations are at T
A
= 25°C. (Notes 3, 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) 0.1 ≤ V
REF
≤ V
CC
, –FS ≤ V
IN
≤ +FS (Note 5)
l
16 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)
= 1.25V (Note 6)
l
2
1
10 ppm of V
REF
Offset Error 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 13)
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
–
= 0.75V
REF
, IN
+
= 0.25V
REF
l
25 ppm of V
REF
Negative 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
Output Noise 5V ≤ V
CC
≤ 5.5V, V
REF
= 5V, GND ≤ IN
–
= IN
+
≤ V
CC
0.84 µV
RMS
Programmable Gain See Table 2b
l
1 128
CONVERTER CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. (Notes 3, 4)
ANALOG INPUT AND REFERENCE
The l 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 GND – 0.3V V
CC
+ 0.3V V
IN
–
Absolute/Common Mode IN
–
Voltage GND – 0.3V V
CC
+ 0.3V V
FS Full Scale of the Differential Input (IN
+
– IN
–
)
l
0.5V
REF
/GAIN V
LSB Least Signifi cant Bit of the Output Code
l
FS/2
16
V
IN
Input Differential Voltage Range (IN
+
– IN
–
)
l
–FS +FS V
V
REF
Reference Voltage Range (REF
+
– REF
–
)
l
0.1 V
CC
V
C
S
(IN
+
)IN
+
Sampling Capacitance 11 pF
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
50Hz ±2%
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 Normal Mode Rejection
50Hz ±2%
2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
–
= IN
+
≤ V
CC
(Notes 5, 7)
2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
–
= IN
+
≤ V
CC
(H-Grade)
l
l
110
104
120 dB
dB
Input Normal Mode Rejection
60Hz ±2%
2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
–
= IN
+
≤ V
CC
(Notes 5, 8)
2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
–
= IN
+
≤ V
CC
(H-Grade)
l
l
110
104
120 dB
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