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SBAS344C–AUGUST 2005–REVISED OCTOBER 2006
TYPICAL CHARACTERISTICS (continued)
At TA = 25°C, RBIAS = 19kΩ, AVDD = 5V, DVDD = 3V, fCLK = 60MHz, VREF = 3V, MODE = 00,and VCM = 2.5V (unless
otherwise noted).
SIGNAL-TO-NOISE RATIO,
SIGNAL-TO-NOISE RATIO
vs INPUT FREQUENCY
TOTAL HARMONIC DISTORTION, AND
SPURIOUS-FREE DYNAMIC RANGE vs INPUT
SIGNAL AMPLITUDE
90
85
100
90
V
= 2 dBFS
IN
SFDR
−THD
80
80
75
70
V
= -6 dBFS
70
IN
60
50
40
SNR
V
= -20 dBFS
IN
65
60
30
20
10
f
= 100 kHz
−10
IN
0.01
0.1
1
10
f
- Input Frequency - Mhz
IN
−70
−60
−50
−40
−30
−20
0
Input Signal (dB)
Figure 10.
Figure 11.
TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
SPURIOUS-FREE DYNAMIC RANGE
vs INPUT FREQUENCY
-85
-90
110
105
100
95
V
= -20 dBFS
IN
V
= -2 dBFS
IN
V
= -6 dBFS
IN
-95
-100
V
= -6 dBFS
V
= -2 dBFS
IN
IN
-105
-110
V
= -20 dBFS
90
85
IN
0.01
0.1
1
10
0.01
0.1 1
- Input Frequency - Mhz
10
f
- Input Frequency - Mhz
IN
f
IN
Figure 12.
Figure 13.
TOTAL HARMONIC DISTORTION
vs CLK FREQUENCY
SIGNAL-TO-NOISE RATIO
vs CLK FREQUENCY
−80
90
88
86
84
82
80
R
= 25 k
BIAS
R
= 31 k
BIAS
−85
−90
R
= 19 k
BIAS
R
= 37 k
BIAS
−95
R
= 25 k
BIAS
R
= 31 k
BIAS
−100
R
BIAS
= 19 k
R
= 37 k
BIAS
−105
−110
f
= 100 kHz,−6 dBFS
IN
fin = 100 KHz, 6 dBFs
5
6
7
8
9
10
11
5
6
7
8
9
10
11
CLK Frequency, f
(MHz)
CLK
CLK Frequency, f
(MHz)
CLK
Figure 14.
Figure 15.
9
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