WinSystems PCM-A/D-12, Руководство по эксплуатации

Страница: 49 / 76

5
®
ADS7807
A.C. PARAMETERS vs TEMPERATURE
(f
IN
= 1kHz, 0dB)
SFDR
THD
Temperature (°C)
–75 –50 –25 0 25 50 75 100 125 150
110
105
100
95
90
85
80
–80
–85
–90
–95
–100
–105
–110
SFDR, SINAD, and SNR (dB)
THD (dB)
SNR
SINAD
SIGNAL-TO-(NOISE + DISTORTION) vs TEMPERATURE
(f
IN
= 1kHz, 0dB; f
S
= 10kHz to 40kHz)
Temperature (°C)
–75 –50 –25 0 25 50 75 100 125 150
40kHz
100
95
90
85
80
75
SINAD (dB)
30kHz
20kHz
10kHz
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY (f
IN
= 0dB)
Input Signal Frequency (Hz)
100 1k 10k 100k 1M
100
80
90
70
60
50
40
30
20
10
SINAD (dB)
TYPICAL PERFORMANCE CURVES
At T
A
= +25
°
C, f
S
= 40kHz, V
DIG
= V
ANA
= +5V, using internal reference and fixed resistors shown in Figure 7b, unless otherwise specified.
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY AND INPUT AMPLITUDE
Input Signal Frequency (kHz)
0 2 4 6 8 10 12 14 16 18 20
100
80
90
70
60
50
40
30
20
10
SINAD (dB)
0dB
–20dB
–60dB
FREQUENCY SPECTRUM
(8192 Point FFT; f
IN
= 15kHz, 0dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0 5 10 15 20
Amplitude (dB)
Frequency (kHz)
FREQUENCY SPECTRUM
(8192 Point FFT; f
IN
= 1kHz, 0dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0 5 10 15 20
Amplitude (dB)
Frequency (kHz)