AMC1304L05 Datasheet, PDF (14/39 Pages) Texas Instruments – High-Precision Reinforced Isolated Delta-Sigma Modulators

AMC1304L05, AMC1304L25, AMC1304M05, AMC1304M25
SBAS655C – SEPTEMBER 2014 – REVISED SEPTEMBER 2015
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Typical Characteristics (continued)
At LDOIN = 15.0 V, DVDD = 3.3 V, AINP = –50 mV to 50 mV (AMC1304x05) or –250 mV to 250 mV (AMC1304x25),
AINN = 0 V, f_CLKIN = 20 MHz, and sinc³ filter with OSR = 256, unless otherwise noted.
0
100
SNR (AMC1304x05)
95
SINAD (AMC1304x05)
-20
SNR (AMC1304x25)
90
SINAD (AMC1304x25)
-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
6
8
10
12
14
16
18
V_LDOIN (V)
D014
Figure 15. Power-Supply Rejection Ratio vs
Ripple Frequency
100
SNR (AMC1304x05)
95
SINAD (AMC1304x05)
SNR (AMC1304x25)
90
SINAD (AMC1304x25)
85
80
75
70
65
60
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
D015
Figure 16. Signal-to-Noise Ratio and Signal-to-Noise +
Distortion vs LDO Input Supply Voltage
100
SNR (AMC1304x05)
95
SINAD (AMC1304x05)
SNR (AMC1304x25)
90
SINAD (AMC1304x25)
85
80
75
70
65
60
5
10
15
f_CLKIN (MHz)
20
D016
Figure 17. Signal-to-Noise Ratio and Signal-to-Noise +
Distortion vs Temperature
100
SNR (AMC1304x05)
95
SINAD (AMC1304x05)
SNR (AMC1304x25)
90
SINAD (AMC1304x25)
85
80
75
70
65
60
0.1 0.2 0.3 0.5 1
2 3 4 5 67 10 20 30 50 70100
f_IN (kHz)
D017
Figure 19. Signal-to-Noise Ratio and Signal-to-Noise +
Distortion vs Input Signal Frequency
Figure 18. Signal-to-Noise Ratio and Signal-to-Noise +
Distortion 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
AMC1304x25
Figure 20. SNR and SINAD vs Input Signal Amplitude
14
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