AMC1203 Datasheet, PDF (11/23 Pages) Texas Instruments – 1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulator

AMC1203
www.ti.com
SBAS427 – FEBRUARY 2008
TYPICAL CHARACTERISTICS (continued)
At V_DD1 = V_DD2 = 5V, V_IN+ = –280mV to +280mV, V_IN– = 0V, and sinc³ filter with OSR = 256, unless otherwise noted.
0
-20
-40
-60
-80
-100
-120
-140
0
120
110
FREQUENCY SPECTRUM
(4096 Point FFT, f_IN = 500Hz, 0.56V_PP)
2 4 6 8 10 12 14 16 18 20
Frequency (kHz)
Figure 15.
COMMON-MODE REJECTION RATIO
vs INPUT SIGNAL FREQUENCY
With
Sinc³ Filter
100
Without
Filter
90
80
100
10.40
10.35
10.30
10.25
10.20
10.15
10.10
10.05
10.00
4.50
1k
10k
100k
f_IN (Hz)
Figure 17.
INTERNAL CLOCK FREQUENCY
vs SUPPLY VOLTAGE
4.75
5.00
5.25
V_DD1 (V)
Figure 19.
1M
5.50
0
-20
-40
-60
-80
-100
-120
-140
0
110
100
90
80
70
60
50
40
100
10.5
FREQUENCY SPECTRUM
(4096 Point FFT, f_IN = 1kHz, 0.56V_PP)
2 4 6 8 10 12 14 16 18 20
Frequency (kHz)
Figure 16.
POWER-SUPPLY REJECTION RATIO
vs FREQUENCY
1k
10k
Frequency (Hz)
Figure 18.
INTERNAL CLOCK FREQUENCY
vs TEMPERATURE
100k
10.4
10.3
10.2
10.1
10.0
-40 -25 -10 5
20 35 50 65 80 95 110 125
Temperature (°C)
Figure 20.
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