Datasheet

ADS1244
4
SBAS273
www.ti.com
TYPICAL CHARACTERISTICS
At T
A
= +25°C, AVDD = +5V, DVDD = +3V, f
CLK
= 2.4576MHz, and V
REF
= +2.5V, unless otherwise specified.
ANALOG CURRENT vs TEMPERATURE
Temperature (°C)
Current (µA)
15–5–25 35 55 75 95–45
110
105
100
95
90
85
80
75
70
AVDD = 5V, f
CLK
= 4.9152MHz
AVDD = 3V, f
CLK
= 2.4576MHz
DIGITAL CURRENT vs TEMPERATURE
Temperature (°C)
Current (µA)
15–5–25 35 55 75 95–45
12
10
8
6
4
2
0
DVDD = 1.8V, f
CLK
= 2.4576MHz
DVDD = 3V, f
CLK
= 4.9152MHz
ANALOG CURRENT vs ANALOG SUPPLY
Analog Supply (V)
Current (µA)
3 3.5 4
4.5 5
5.52.5
94
92
90
88
86
84
82
80
f
CLK
= 4.9152MHz
f
CLK
= 2.4576MHz
DIGITAL CURRENT vs DIGITAL SUPPLY
Digital Supply (V)
Current (µA)
2 2.5 3
3.5
41.5
20
18
16
14
12
10
8
6
4
2
0
f
CLK
= 4.9152MHz
f
CLK
= 2.4576MHz
INTEGRAL NONLINEARITY vs V
IN
V
IN
(V)
INL (ppm of FSR)
1–1–335–5
3
2
1
0
–1
–2
–3
T = –40°C
T = 25°C
AVDD = 5V, V
REF
= 2.5V
T = 85°C
INTEGRAL NONLINEARITY vs V
IN
V
IN
(V)
INL (ppm of FSR)
0.5–0.5–1.5 1.5 2.5–2.5
3
2
1
0
–1
–2
–3
T = 25°C
T = 85°C
T = –40°C
AVDD = 3V, V
REF
= 1.25V