AMC1203_15 Datasheet, PDF (11/29 Pages) Texas Instruments – 1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulator

AMC1203
www.ti.com
SBAS427C – FEBRUARY 2008 – REVISED JUNE 2011
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.
FREQUENCY SPECTRUM
FREQUENCY SPECTRUM
(4096 Point FFT, f_IN = 500Hz, 0.56V_PP)
(4096 Point FFT, f_IN = 1kHz, 0.56V_PP)
0
0
-20
-20
-40
-40
-60
-60
-80
-80
-100
-100
-120
-120
-140
0 2 4 6 8 10 12 14 16 18 20
Frequency (kHz)
Figure 15.
-140
0 2 4 6 8 10 12 14 16 18 20
Frequency (kHz)
Figure 16.
COMMON-MODE REJECTION RATIO
vs INPUT SIGNAL FREQUENCY
120
With
Sinc³ Filter
110
100
Without
Filter
90
80
100
1k
10k
100k
1M
f_IN (Hz)
Figure 17.
110
100
90
80
70
60
50
40
100
POWER-SUPPLY REJECTION RATIO
vs FREQUENCY
1k
10k
Frequency (Hz)
Figure 18.
100k
10.40
INTERNAL CLOCK FREQUENCY
vs SUPPLY VOLTAGE
10.35
10.30
10.25
10.20
10.15
10.10
10.05
10.00
4.50
4.75
5.00
5.25
5.50
V_DD1 (V)
Figure 19.
INTERNAL CLOCK FREQUENCY
vs TEMPERATURE
10.5
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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