Datasheet

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TYPICAL CHARACTERISTICS
Frequency (kHz)
0
−
20
−
40
−
60
−
80
−
100
−
120
Amplitude (dB)
0 62.5 125 250187.5
Frequency (kHz)
0
−
20
−
40
−
60
−
80
−
100
−
120
Amplitude (dB)
0 62.5 125 250187.5
SNR and SINAD (dB)
10k 100k1k 1M
Input Frequency (Hz)
75
70
65
60
55
50
SINAD
SNR
SNR
1.0
0.6
0.2
−
0.2
−
0.6
−
1.0
Delta from +25

C (dB)
SINAD
Temperature (

C)
−
20
−
40 0 20 40 60 80
ADS7864
SBAS141A – SEPTEMBER 2000 – REVISED MARCH 2005
All specifications T
A
= +25°C, +V
A
= +V
D
= +5V, V
REF
= internal +2.5V and f
CLK
= 8MHz, f
SAMPLE
= 500kHz (unless otherwise
noted)
FREQUENCY SPECTRUM FREQUENCY SPECTRUM
(4096 Point FFT; f
IN
= 99.9kHz, –0.2dB) (4096 Point FFT; f
IN
= 199.9kHz, -0.2dB)
Figure 1. Figure 2.
SIGNAL-TO-NOISE RATIO AND CHANGE IN SIGNAL-TO-NOISE RATIO
SIGNAL-TO-(NOISE+DISTORTION) AND SIGNAL-TO-(NOISE+DISTORTION)
vs INPUT FREQUENCY vs TEMPERATURE
Figure 3. Figure 4.
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