LTC2485
3
2485fc
ELECTRICAL CHARACTERISTICS (2X SPEED) The l denotes the specications which apply over
the full operating temperature range, otherwise specications are at TA = 25°C. (Notes 3, 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution (No Missing Codes)
0.1 ≤ VREF ≤ VCC, –FS ≤ VIN ≤ +FS (Note 5)
●
24
Bits
Integral Nonlinearity
5V ≤ VCC ≤ 5.5V, VREF = 5V, VIN(CM) = 2.5V (Note 6)
2.7V ≤ VCC ≤ 5.5V, VREF = 2.5V, VIN(CM) = 1.25V (Note 6)
●
2
1
10
ppm of VREF
Offset Error
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Note 13)
●
0.5
2
mV
Offset Error Drift
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC
100
nV/°C
Positive Full-Scale Error
2.5V ≤ VREF ≤ VCC, IN+ = 0.75VREF, IN– = 0.25VREF
●
25
ppm of VREF
Positive Full-Scale Error Drift
2.5V ≤ VREF ≤ VCC, IN+ = 0.75VREF, IN– = 0.25VREF
0.1
ppm of VREF/°C
Negative Full-Scale Error
2.5V ≤ VREF ≤ VCC, IN– = 0.75VREF, IN+ = 0.25VREF
●
25
ppm of VREF
Negative Full-Scale Error Drift
2.5V ≤ VREF ≤ VCC, IN– = 0.75VREF, IN+ = 0.25VREF
0.1
ppm of VREF/°C
Output Noise
5V ≤ VCC ≤ 5.5V, VREF = 5V, GND ≤ IN– = IN+ ≤ VCC
0.84
μVRMS
CONVERTER CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. (Notes 3, 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Common Mode Rejection DC
2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Note 5)
●
140
dB
Input Common Mode Rejection
50Hz ± 2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Note 5)
●
140
dB
Input Common Mode Rejection
60Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Note 5)
●
140
dB
Input Normal Mode Rejection
50Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Notes 5, 7)
●
110
120
dB
Input Normal Mode Rejection
60Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Notes 5, 8)
●
110
120
dB
Input Normal Mode Rejection
50Hz/60Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Notes 5, 9)
●
87
dB
Reference Common Mode Rejection DC
2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Note 5)
●
120
140
dB
Power Supply Rejection DC
VREF = 2.5V, IN– = IN+ = GND
120
dB
Power Supply Rejection, 50Hz ±2%
VREF = 2.5V, IN– = IN+ = GND (Notes 7, 9)
120
dB
Power Supply Rejection, 60Hz ±2%
VREF = 2.5V, IN– = IN+ = GND (Notes 8, 9)
120
dB
ANALOG INPUT AND REFERENCE The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IN+
Absolute/Common Mode IN+ Voltage
GND – 0.3V
VCC + 0.3V
V
IN–
Absolute/Common Mode IN– Voltage
GND – 0.3V
VCC + 0.3V
V
FS
Full-Scale of the Differential Input (IN+ – IN–)
●
0.5VREF
V
LSB
Least Signicant Bit of the Output Code
●
FS/224
VIN
Input Differential Voltage Range (IN+ – IN–)
●
–FS
+FS
V
VREF
Reference Voltage Range (REF+ – REF–)
●
0.1
VCC
V