Datasheet

ADS1244
5
SBAS273
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
At T
A
= +25°C, AVDD = +5V, DVDD = +3V, f
CLK
= 2.4576MHz, and V
REF
= +2.5V, unless otherwise specified.
INTEGRAL NONLINEARITY vs ANALOG SUPPLY
Analog Supply (V)
INL (ppm of FSR)
1.5 2 2.5 3 3.5 4 4.5 5 5.5
20
18
16
14
12
10
8
6
4
2
0
T = 25°C
T = 85°C
T = –40°C
V
REF
= AVDD
INTEGRAL NONLINEARITY vs ANALOG SUPPLY
Analog Supply (V)
INL (ppm of FSR)
1.5 2 2.5 3 3.5 4 4.5 5 5.5
20
18
16
14
12
10
8
6
4
2
0
T = 25°C
T = 85°C
T = –40°C
V
REF
= AVDD/2
OFFSET vs TEMPERATURE
Temperature (°C)
Normalized Offset (ppm of FSR)
15–5–25 35 55 75 95–45
1
0.5
0
–0.5
–1
GAIN vs TEMPERATURE
Temperature (°C)
Normalized Gain
15–5–25 35 55 75 95–45
1.00008
1.00006
1.00004
1.00002
1
0.99998
0.99996
0.99994
0.99992
0.9999
NOISE vs TEMPERATURE
Temperature (°C)
Noise (ppm of FSR, rms)
–25 –515
35 55 75
95–45
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
NOISE vs INPUT SIGNAL
V
IN
(V)
Noise (ppm of FSR, rms)
–3 –11
3
5–5
1.6
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6