Datasheet

ADS8345
SBAS177C
5
www.ti.com
TYPICAL CHARACTERISTICS: +5V
At T
A
= +25°C, +V
CC
= +5V, V
REF
= +2.5V, f
SAMPLE
= 100kHz, and f
DCLK
= 24 • f
SAMPLE
= 2.4MHz, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
FREQUENCY SPECTRUM
(4096 Point FFT; f
IN
= 1.001kHz, –0.2dB)
0 1020304050
Frequency (kHz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
–120
–140
FREQUENCY SPECTRUM
(4096 Point FFT; f
IN
= 9.985kHz, –0.2dB)
0 1020304050
Frequency (kHz)
Amplitude (dB)
SIGNAL-TO-NOISE RATIO AND
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY
101 100
Frequency (kHz)
SNR and SINAD (dB)
100
90
80
70
60
SINAD
SNR
SPURIOUS-FREE DYNAMIC RANGE
AND TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
101 100
Frequency (kHz)
SFDR (dB)
THD (dB)
110
100
90
80
70
60
–110
–100
–90
–80
–70
–60
THD
(1)
SFDR
NOTE: (1) First Nine Harmonics
of the Input Frequency
EFFECTIVE NUMBER OF BITS
vs INPUT FREQUENCY
101 100
Frequency (kHz)
Effective Number of Bits
15.0
14.5
14.0
13.5
13.0
12.5
12.0
11.5
11.0
CHANGE IN SIGNAL-TO-(NOISE + DISTORTION)
vs TEMPERATURE
–50 –25 0 20 50 75 100
Temperature (°C)
Delta from +25°C (dB)
0.2
0.0
–0.2
–0.4
–0.6
–0.8
0.4
f
IN
= 4.956kHz, –0.2dB