
LTC2498
3
2498ff
electrical characteristics (norMal speeD) The
l
denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at TA = 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 TA = 25°C. (Notes 3, 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution (No Missing Codes)
0.1V ≤ 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) = 1.2V (Note 6)
l
2
1
10
ppm of VREF
Offset Error
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Note 14)
l
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
l
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+ = 0.25VREF, IN– = 0.75VREF
l
25
ppm of VREF
Negative Full-Scale Error Drift
2.5V ≤ VREF ≤ VCC, IN+ = 0.25VREF, IN– = 0.75VREF
0.1
ppm of VREF/°C
Output Noise
5V ≤ VCC ≤ 2.5V, VREF = 5V, GND ≤ IN+ = IN– ≤ VCC
0.85
VRMS
converter characteristics The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Common Mode Rejection DC
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Note 5)
l
140
dB
Input Common Mode Rejection 60Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Note 5)
l
140
dB
Input Common Mode Rejection 50Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Note 5)
l
140
dB
Input Normal Mode Rejection 50Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Notes 5, 7)
l
110
120
dB
Input Normal Mode Rejection 60Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Notes 5, 8)
l
110
120
dB
Input Normal Mode Rejection 50Hz/60Hz ±2%
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Notes 5, 9)
l
87
dB
Reference Common Mode Rejection DC
2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Note 5)
l
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
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Total Unadjusted Error
5V ≤ VCC ≤ 5.5V, VREF = 2.5V, VIN(CM) = 1.25V
5V ≤ VCC ≤ 5.5V, VREF = 5V, VIN(CM) = 2.5V
2.7V ≤ VCC ≤ 5.5V, VREF = 2.5V, VIN(CM) = 1.25V
15
ppm of VREF
Output Noise
5.5V < VCC < 2.7V, 2.5V ≤ VREF ≤ VCC,
GND ≤ IN+ = IN– ≤ VCC (Note 13)
0.6
VRMS
Internal PTAT Signal
TA = 27°C (Note 5)
27.8
28.0
28.2
mV
Internal PTAT Temperature Coefficient
93.5
V/°C
analog input anD reFerence The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 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
VCC + 0.3V
V
IN–
Absolute/Common Mode IN– Voltage
(IN– Corresponds to the Selected Negative Input Channel)
GND – 0.3V
VCC + 0.3V
V