Datasheet

ADS8345
SBAS177C
7
www.ti.com
TYPICAL CHARACTERISTICS: +5V (Cont.)
At T
A
= +25°C, +V
CC
= +2.5V, V
REF
= +2.5V, f
SAMPLE
= 100kHz, and f
DCLK
= 24 • f
SAMPLE
= 2.4MHz, unless otherwise noted.
WORST-CASE CHANNEL-TO-CHANNEL
GAIN MATCH vs TEMPERATURE
–50 –25 0 25 50 75 100
Temperature (°C)
Gain Match (LSBs)
0.5
0.4
0.3
0.2
0.1
COMMON-MODE REJECTION vs FREQUENCY
0.1 1 10 100
Frequency (kHz)
CMRR (dB)
100
90
80
70
60
50
V
CM
= 2Vp-p Sinewave Centered Around V
REF
TYPICAL CHARACTERISTICS: +2.7V
At T
A
= +25°C, +V
CC
= +2.7V, V
REF
= +1.25V, 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)
95
85
75
65
55
SINAD
SNR
SPURIOUS-FREE DYNAMIC RANGE
AND TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
101 100
Frequency (kHz)
SFDR (dB)
THD (dB)
100
90
80
70
60
50
–100
–90
–80
–70
–60
–50
THD
(1)
SFDR
NOTE: (1) First Nine Harmonics
of the Input Frequency