Datasheet

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SBAS287A − JUNE 2003 − REVISED SEPTEMBER 2003
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4
TYPICAL CHARACTERISTICS
At T
A
= +25°C, AVDD = +5V, DVDD = +3V, f
CLK
= 2.4576MHz, and V
REF
= +1.25V, unless otherwise specified.
Figure 1
ANALOG CURRENT vs TEMPERATURE
Temperature (
_
C)
Current (
µ
A)
15
−
5
−
25 35 55 75 95
−
45
220
210
200
190
180
170
160
150
140
130
120
110
100
AVDD = +3V, f
CLK
=2.4576MHz
AVDD = +5V, f
CLK
= 4.9152MHz
Figure 2
DIGITAL CURRENT vs TEMPERATURE
Temperature (
_
C)
Current (
µ
A)
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
Figure 3
ANALOG CURRENT vs ANALOG SUPPLY
Analog Supply (V)
Current (
µ
A)
4.03.53.0 4.5 5.0 5.52.5
164
162
160
158
156
154
152
150
148
f
CLK
=2.4576MHz
f
CLK
=4.9152Hz
Figure 4
DIGITAL CURRENT vs DIGITAL SUPPLY
Digital Supply (V)
Current (
µ
A)
15
−
5
−
25 35 55 75 95
−
45
16
14
12
10
8
6
4
2
0
f
CLK
= 4.9152MHz
f
CLK
= 2.4576MHz
Figure 5
INTEGRAL NONLINEARITY vs ANALOG SUPPLY
V
REF
= 1.25; f
OSC
= 2.4576MHz
V
CM
= 2.4 or (( 1.8)/2 + 0.3), whichever is smaller
(V)
INL (ppm of FSR)
4.03.53.0 4.5 5.0 5.52.5
30
25
20
15
10
5
0
T=+25
_
C
T=+85
_
C
T= 40
_
C−
−
AVDD
AVDD
Figure 6
INTEGRAL NONLINEARITY vs V
IN
V
IN
(V)
T=+25
_
C
T=+85
_
C
T=
−
40
_
C
INL (ppm of FSR)
−
1.5
−
0.5 0.5 1.5 2.5
−
2.5
12.5
10.0
7.5
5.0
2.5
0
−
2.5
−
5.0
−
7.5
−
10.0
−
12.5