Datasheet

-55 -35
Temperature( C)°
125
124
123
122
121
120
SNR(dB)
-15 5 12545 8525 65 105
SNR:ShortedInput
THD:V =31.25Hz, 0.5dBFS-
IN
-115
-117
-119
-121
-123
-125
THD(dB)
0 1
V (V)
REF
6
5
4
0
Noise( V )m
RMS
2 3 654
3
-105
-110
-115
-135
THD(dB)
-120
Noise:ShortedInput
THD:V =31.25Hz, 0.5dBFS-
IN
2 -125
1 -130
1.0 1.5
f (MHz)
CLK
125
123
121
117
SNR(dB)
2.0 2.5 4.53.53.0 4.0
119
-105
-110
-115
-125
THD(dB)
-120
SNR:ShortedInput
THD:V =31.25Hz, 0.5dBFS-
IN
DataRate=f /4096
CLK
10 100
Power-SupplyandCommon-ModeFrequency(Hz)
140
120
100
0
PSRandCMR(dB)
1k 10k 1M100k
80
CMR
AVDD
60
40
40
AVSS
DVDD
-2.5 -2.0
InputLevel(V)
3
2
1
0
-1
-3
LinearityError(ppm)
-1.5 -1.0 2.50 1.0 2.0-0.5 0.5 1.5
-2
IntegralNonlinearity= 0.5ppm±
-55 -35
Temperature( C)°
4
2
1
0
INL(ppm)
-15 5 1256525 85 105
3
45
16
8
4
0
Power(mW)
12
INL
Power
ADS1281
SBAS378D –AUGUST 2007–REVISED JUNE 2010 www.ti.com
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, AVDD = +2.5V, AVSS = –2.5V, f
CLK
= 4.096MHz, VREFP = +2.5V, VREFN = –2.5V, DVDD = +3.3V, and
f
DATA
= 1000SPS, unless otherwise noted.
SNR AND THD vs TEMPERATURE NOISE AND THD vs V
REF
Figure 7. Figure 8.
POWER-SUPPLY AND COMMON-MODE REJECTION
SNR AND THD vs f
CLK
vs FREQUENCY
Figure 9. Figure 10.
LINEARITY ERROR vs INPUT LEVEL INL AND POWER vs TEMPERATURE
Figure 11. Figure 12.
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