ADS1208
www.ti.com
SBAS348A–MARCH 2005–REVISED MARCH 2005
TYPICAL CHARACTERISTICS (continued)
At 25°C, AVDD = BVDD = +5V, VREF = internal +2.5V, Mode 3, MCLK input = 20MHz, differential input voltage = 200mVPP
common-mode voltage = 1.4V, and 16-bit Sinc3 filter with OSR = 256, unless otherwise noted.
,
FREQUENCY SPECTRUM
(4096 POINT FFT, fIN = 1kHz)
FREQUENCY SPECTRUM
(4096 POINT FFT, fIN = 5kHz)
0
20
40
60
80
0
20
40
60
80
−
−
−
−
−
−
−
−
−
−
−
−
−
−
100
120
140
100
120
140
0
5
10
15
20
1000
+80
0
5
10
15
20
Frequency (kHz)
Frequency (kHz)
Figure 20.
Figure 21.
COMMON-MODE REJECTION RATIO vs
FREQUENCY
POWER-SUPPLY REJECTION RATIO vs
FREQUENCY
110
105
100
95
90
85
80
75
70
65
60
55
50
M3
M0
90
M0
M3
85
80
75
70
65
60
1
10
100
0.1
1
10
100
1000
Frequency (kHz)
Frequency (kHz)
Figure 22.
Figure 23.
CLOCK FREQUENCY vs
TEMPERATURE
CLOCK FREQUENCY vs
POWER SUPPLY
10.6
10.20
10.15
10.10
10.05
10.00
9.95
10.5
10.4
10.3
10.2
10.1
10.0
9.9
9.8
9.7
9.6
−
−
20
40
0
+20
+40
+60
4.50
4.75
5.00
5.25
5.50
_
VDD (V)
Temperature ( C)
Figure 24.
Figure 25.
12
BB [ BURR-BROWN CORPORATION ]
