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SBAS341B − DECEMBER 2004 − REVISED APRIL 2005
TYPICAL CHARACTERISTICS (continued)
All specifications at T = 25°C, AVDD = 5V, DVDD = IOVDD = 3V, f
unless otherwise noted.
= 40MHz, External V = +3V, V
REF CM
= +1.45V, and R
BIAS
= 37kΩ,
A
CLK
TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
SPURIOUS−FREE DYNAMIC RANGE
vs INPUT FREQUENCY
130
120
110
−
−
−
−
80
85
90
95
−
= 10dB
VIN
−
= 10dB
VIN
−
= 6dB
VIN
100
90
−
−
−
−
−
100
105
110
115
120
−
= 1dB
VIN
−
= 6dB
VIN
80
−
= 1dB
VIN
70
10k
100k
1M
10k
100k
1M
Input Frequency, fIN (Hz)
Input Frequency, fIN (Hz)
Figure 21
Figure 22
SIGNAL−TO−NOISE RATIO
vs INPUT COMMON−MODE VOLTAGE
TOTAL HARMONIC DISTORTION
vs INPUT COMMON−MODE VOLTAGE
93
92
91
90
89
88
87
86
85
−
−
−
70
−
= 1dB
fIN = 10kHz, VIN
−
= 1dB
fIN = 100kHz, VIN
−
fIN = 100kHz, VIN
=
1dB
80
90
−
fIN = 10kHz, VIN
=
1dB
−
100
110
−
= 6dB
fIN = 100kHz, VIN
−
−
−
=
fIN = 100kHz, VIN
=
6dB
fIN = 10kHz, VIN
2.6 3.0
=
6dB
3.4
fIN = 10kHz, VIN
1.4 1.8
6dB
2.2
−
1.0
1.4 1.8
2.2
1.0
2.6
3.0
3.4
Input Common−Mode Voltage, VCM (V)
Input Common−Mode Voltage, VCM (V)
Figure 23
Figure 24
SPURIOUS−FREE DYNAMIC RANGE
vs INPUT COMMON−MODE VOLTAGE
OFFSET DRIFT OVER TIME
3
2
1
0
110
105
100
95
−
= 6dB
fIN = 10kHz, VIN
−
= 6dB
fIN = 100kHz, VIN
fIN = 10kHz
−
= 1dB
VIN
90
−
−
−
1
2
3
85
−
fIN = 100kHz, VIN
1.4 1.8
=
1dB
80
0
100 200 300 400 500 600 700 800 900 1000
Time Interval (s)
1.0
2.2
2.6
3.0
3.4
Input Common−Mode Voltage, VCM (V)
Figure 25
Figure 26
12
BB [ BURR-BROWN CORPORATION ]
