ꢋꢑ ꢉꢀ ꢁ ꢗ ꢇ
ꢋꢑ ꢉꢀ ꢁ ꢗ ꢁ
www.ti.com
SBAS274E − MARCH 2003 − REVISED JUNE 2004
TYPICAL CHARACTERISTICS (continued)
All specifications at T = 25°C, AVDD = 5V, DVDD = IOVDD = 3V, f
CLK
BIAS
= 40MHz, External V
REF
= +3V, 2XMODE = low, V
CM
= 2.0V, and
A
R
= 37kΩ, unless otherwise noted.
SIGNAL−TO−NOISE RATIO
vs INPUT COMMON−MODE VOLTAGE
TOTAL HARMONIC DISTORTION
vs INPUT COMMON−MODE VOLTAGE
−
−
−
−
89
87
85
83
81
79
77
75
65
75
85
95
−
VIN
=
=
2dBFS
6dBFS
−
= 2dBFS
VIN
VIN
−
VIN
−
=
6dBFS
−
105
−
115
125
135
−
−
fIN = 100kHz
1.7
fIN = 100kHz
1.7
1.5
1.9
2.1
2.3
2.5
1.5
1.9
2.1
2.3
2.5
Input Common−Mode Voltage, VCM (V)
Input Common−Mode Voltage, VCM (V)
SPURIOUS−FREE DYNAMIC RANGE
vs INPUT COMMON−MODE VOLTAGE
SIGNAL−TO−NOISE RATIO
vs CLK FREQUENCY
105
100
95
90
85
80
75
70
65
60
55
50
45
40
Ω
BIAS = 30k
R
−
= 6dBFS
VIN
−
= 2dBFS
VIN
Ω
R
BIAS = 37k
BIAS = 45k
RBIAS = 50k
90
Ω
R
85
Ω
80
Ω
BIAS = 60k
R
75
fIN = 100kHz, 6dBFS
70
fIN = 100kHz
1.7
65
1.5
1.9
2.1
2.3
2.5
10
20
30
40
50
60
Input Common−Mode Voltage, VCM (V)
CLK Frequency, fCLK (MHz)
TOTAL HARMONIC DISTORTION
vs CLK FREQUENCY
SPURIOUS−FREE DYNAMIC RANGE
vs CLK FREQUENCY
−
−
−
−
−
−
−
65
110
−
fIN = 100kHz, 6dBFS
−
fIN = 100kHz, 6dBFS
70
75
80
85
90
95
105
100
95
Ω
RBIAS = 60k
Ω
R
BIAS = 30k
Ω
BIAS = 50k
R
Ω
RBIAS = 37k
Ω
RBIAS = 45k
Ω
R
BIAS = 45k
RBIAS = 50k
RBIAS = 60k
90
Ω
85
Ω
Ω
RBIAS = 37k
80
−
−
100
105
Ω
RBIAS = 30k
75
10
20
30
40
50
60
10
20
30
40
50
60
CLK Frequency, fCLK (MHz)
CLK Frequency, fCLK (MHz)
14
BB [ BURR-BROWN CORPORATION ]
