Datasheet

0
0.5
1
1.5
2
2.5
3
−11 −9 −7 −5 −3 −1 1 3 5 7 9 11
Current Load (mA)
Reference Voltage (V)
G007
60
63
66
69
72
75
1 1.5 2 2.5 3 3.5 4 4.5 5
Reference Voltage (V)
Signal to Noise and Distortion (dB)
AVDD = 5 V
DVDD = 5 V
External Reference Mode
G011
70
71
72
73
74
1k 10k 100k 500k
Input Frequency (dB)
Signal to Noise and Distortion (dB)
R
IN
= 200Ω
R
IN
= 100Ω
R
IN
= 50Ω
R
IN
= 33Ω
R
IN
= 0Ω
G012
−90
−85
−80
−75
−70
1k 10k 100k 500k
Input Frequency (dB)
Total Harmonic Distortion (dB)
R
IN
= 200Ω
R
IN
= 100Ω
R
IN
= 50Ω
R
IN
= 33Ω
R
IN
= 0Ω
G013
−140
−120
−100
−80
1k 10k 100k 1M 10M 100M
Supply Ripple Frequency (Hz)
Power −Supply Rejection
Ratio (dB)
G014
70
80
90
100
110
120
0 50 100 150 200 250 300 350 400 450 500
Input Frequency (dB)
Channel−to−Channel Isolation
Crosstalk (dB)
G015
ADS8028
www.ti.com SBAS549B –MAY 2011–REVISED MARCH 2012
TYPICAL CHARACTERISTICS (continued)
All plots at T
A
= +25°C, AVDD = 3.0 V, DVDD = 3.0 V,
f
SAMPLE
= 1 MHz, f
SCLK
= 20 MHz, and V
REF
= 2.5 V internal, unless otherwise noted.
V
REF
vs CURRENT LOAD SINAD vs V
REF
Figure 8. Figure 9.
SINAD vs INPUT FREQUENCY FOR VARIOUS SOURCE THD vs INPUT FREQUENCY FOR VARIOUS SOURCE
IMPEDANCES IMPEDANCES
Figure 10. Figure 11.
PSRR vs POWER-SUPPLY RIPPLE FREQUENCY CROSSTALK vs INPUT REQUENCY
Figure 12. Figure 13.
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