Datasheet

ADS7841
6
SBAS084B
0
–20
–40
–60
–80
–100
–120
FREQUENCY SPECTRUM
(4096 Point FFT; f
IN
= 1,129Hz, –0.2dB)
0 62.515.6 46.931.3
Frequency (kHz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
–120
FREQUENCY SPECTRUM
(4096 Point FFT; f
IN
= 10.6kHz, –0.2dB)
0 62.515.6 46.931.3
Frequency (kHz)
Amplitude (dB)
EFFECTIVE NUMBER OF BITS
vs INPUT FREQUENCY
101 100
Input Frequency (kHz)
Effective Number of Bits
12.0
11.5
11.0
10.5
10.0
9.5
9.0
TYPICAL CHARACTERISTICS: +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.
CHANGE IN SIGNAL-TO-(NOISE+DISTORTION)
vs TEMPERATURE
–20–40 100
Temperature (˚C)
Delta from +25°C (dB)
0.2
0.0
–0.2
–0.4
–0.6
–0.8
0.4
0 20 40 60 80
f
IN
= 10kHz, –0.2dB
SIGNAL-TO-NOISE RATIO AND SIGNAL-TO-
(NOISE+DISTORTION) vs INPUT FREQUENCY
101 100
Input Frequency (kHz)
SNR and SINAD (dB)
78
74
70
66
62
58
54
SINAD
SNR
THD
SFDR
SPURIOUS-FREE DYNAMIC RANGE AND TOTAL
HARMONIC DISTORTION vs INPUT FREQUENCY
101 100
Input Frequency (kHz)
SFDR (dB)
THD (dB)
90
85
80
75
70
65
60
55
50
–90
–85
–80
–75
–70
–65
–60
–55
–50