Linear Technology DC939A - LTC2484IDD 24-Bit Delta Sigma ADC w/Temp (req. DC590B) DC939A DC939A Data Sheet
Product codes
DC939A
LTC2484
3
2484fd
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution (No Missing Codes)
0.1 ≤ V
REF
≤ V
CC
, –FS ≤ V
IN
≤ +FS (Note 5)
l
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)
= 1.25V (Note 6)
l
2
1
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
+
= 0.75V
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
(Note 13)
0.84
μV
RMS
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)
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%
50Hz ±2%
2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
–
= IN
+
≤ V
CC
(Note 5)
l
140
dB
Input Common Mode Rejection
60Hz ±2%
60Hz ±2%
2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
–
= IN
+
≤ V
CC
(Note 5)
l
140
dB
Input Normal Mode Rejection
50Hz ±2%
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%
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%
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
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 (Note 7)
120
dB
Power Supply Rejection, 60Hz ±2%
V
REF
= 2.5V, IN
–
= IN
+
= GND (Note 8)
120
dB
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
V
LSB
Least Signifi cant Bit of the Output Code
l
FS/2
24
V
IN
Input Differential Voltage Range (IN
+
– IN
–
)
l
–FS
+FS
V
V
REF
Reference Voltage Range
l
0.1
V
CC
V
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)