Linear Technology LTC2983 - ADC Electrical Characteristics; Reference Electrical Characteristics

LTC2983
4
2983fc
For more information www.linear.com/LTC2983
ADC ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) –F
S
≤ V
IN
≤ + F
S
l
24 Bits
Integral Nonlinearity V
IN(CM)
= 1.25V (Note 15)
l
2 30 ppm of V
REF
Offset Error
l
0.5 2 µV
Offset Error Drift (Note 4)
l
10 20 nV/°C
Positive Full-Scale Error (Notes 3, 15)
l
100 ppm of V
REF
Positive Full-Scale Drift (Notes 3, 15)
l
0.1 0.5 ppm of V
REF
/°C
Input Leakage (Note 18)
H-Grade
l
l
1
10
nA
nA
Negative Full-Scale Error (Notes 3, 15)
l
100 ppm of V
REF
Negative Full-Scale Drift (Notes 3, 15)
l
0.1 0.5 ppm of V
REF
/°C
Input Referred Noise (Note 5)
H-Grade
l
l
0.8 1.5
2.0
µV
RMS
µV
RMS
Common Mode Input Range
l
–0.05 V
DD
– 0.3 V
RTD Excitation Current (Note 16)
l
–25 Table 30 25 %
RTD Excitation Current Matching Continuously Calibrated
l
Error within Noise Level of ADC
Thermistor Excitation Current (Note 16)
l
–37.5 Table 53 37.5 %
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C.
REFERENCE ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage V
REFOUT
(Note 10) 2.49 2.51 V
Output Voltage Temperature Coefficient I-Grade, H-Grade
l
3 15 ppm/°C
Output Voltage Temperature Coefficient C-Grade
l
3 20 ppm/°C
Line Regulation
l
10 ppm/V
Load Regulation I
OUT(SOURCE)
= 100µA
l
5 mV/mA
I
OUT(SINK)
= 100µA
l
5 mV/mA
Output Voltage Noise 0.1Hz ≤ f ≤ 10Hz 4 µV
P-P
10Hz ≤ f ≤ 1kHz 4.5 µV
P-P
Output Short-Circuit Current Short V
REFOUT
to GND 40 mA
Short V
REFOUT
to V
DD
30 mA
Turn-On Time 0.1% Setting, C
LOAD
= 1µF 115 µs
Long Term Drift of Output Voltage (Note 13) 60 ppm/√khr
Hysteresis (Note 14) ∆T = 0°C to 70°C
∆T = –40°C to 85°C
30
70
ppm
ppm
The l denotes the specifications which apply over
the full operating temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Normal Mode Rejection 50Hz (Notes 4, 8)
l
120 dB
Input Normal Mode Rejection 50Hz/60Hz (Notes 4, 6, 9)
l
75 dB
Power-On Reset Threshold 2.25 V
Analog Power-Up (Note 11)
l
100 ms
Digital Initialization (Note 12)
l
100 ms
The l denotes the specifications
which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
COMPLETE SYSTEM ELECTRICAL CHARACTERISTICS