ADS7844 Datasheet, PDF (6/14 Pages) Burr-Brown (TI) – 12-Bit, 8-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER

TYPICAL PERFORMANCE CURVES:+2.7V
At T_A = +25°C, +V_CC = +2.7V, V_REF = +2.5V, f_SAMPLE = 125kHz, and f_CLK = 16 • f_SAMPLE = 2MHz, unless otherwise noted.
FREQUENCY SPECTRUM
(4096 Point FFT; fIN = 1,129Hz, –0.2dB)
0
–20
–40
–60
–80
–100
–120
0
15.6
31.3
46.9
62.5
Frequency (kHz)
FREQUENCY SPECTRUM
(4096 Point FFT; fIN = 10.6kHz, –0.2dB)
0
–20
–40
–60
–80
–100
–120
0
15.6
31.3
46.9
62.5
Frequency (kHz)
SIGNAL-TO-NOISE RATIO AND SIGNAL-TO-
(NOISE+DISTORTION) vs INPUT FREQUENCY
78
SNR
74
70
66
SINAD
62
58
54
1
10
100
Input Frequency (kHz)
SPURIOUS FREE DYNAMIC RANGE AND TOTAL
HARMONIC DISTORTION vs INPUT FREQUENCY
90
–90
85
–85
SFDR
80
–80
75
–75
70
–70
THD
65
–65
60
–60
55
–55
50
1
10
Input Frequency (kHz)
–50
100
12.0
11.5
11.0
10.5
10.0
9.5
9.0
1
EFFECTIVE NUMBER OF BITS
vs INPUT FREQUENCY
10
100
Input Frequency (kHz)
CHANGE IN SIGNAL-TO-(NOISE+DISTORTION)
vs TEMPERATURE
0.4
f_IN = 10kHz, –0.2dB
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–40 –20
0
20
40
60
Temperature (˚C)
80 100
®
ADS7844
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