AMC1305L25 Datasheet, PDF (13/39 Pages) Texas Instruments – AMC1305x High-Precision, Reinforced Isolated Delta-Sigma Modulators

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AMC1305L25, AMC1305M05, AMC1305M25
SBAS654C – JUNE 2014 – REVISED DECEMBER 2014
Typical Characteristics (continued)
At T_A = 25°C, AVDD = 5.0 V, DVDD = 3.3 V, AINP = –250 mV to 250 mV, AINN = 0 V, f_CLKIN = 20 MHz, and sinc³ filter with
OSR = 256, unless otherwise noted.
0
100
1305x25
SNR (x25)
1305M05
95
SINAD (x25)
-20
SNR (M05)
90
SINAD (M05)
-40
85
-60
80
75
-80
70
-100
65
-120
0.001
0.01
0.1
1
10
Ripple Frequency (kHz)
100
D013
60
4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5
AVDD (V)
D014
Figure 15. Power-Supply Rejection Ratio vs
Ripple Frequency
100
SNR (x25)
95
SINAD (x25)
SNR (M05)
90
SINAD (M05)
85
80
75
70
65
60
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
D015
Figure 16. SNR and SINAD vs High-Side Supply Voltage
100
95
90
85
80
75
70
65
60
5
SNR (x25)
SINAD (x25)
SNR (M05)
SINAD (M05)
10
15
f_CLKIN (MHz)
20
D016
Figure 17. SNR and SINAD vs Temperature
100
SNR (x25)
95
SINAD (x25)
SNR (M05)
90
SINAD (M05)
85
80
75
70
65
60
0.1
1
10
f_IN (kHz)
100
D017
Figure 19. SNR and SINAD vs Input Signal Frequency
Figure 18. SNR and SINAD vs Clock Frequency
100
SNR
95
SINAD
90
85
80
75
70
65
60
55
50
0 50 100 150 200 250 300 350 400 450 500
V_IN (mVpp)
D018
AMC1305x25
Figure 20. SNR and SINAD vs Input Signal Amplitude
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