Datasheet


SBAS312B − JANUARY 2005 − REVISED AUGUST 2007
www.ti.com
9
TYPICAL CHARACTERISTICS (continued)
AV
DD
= 5V, BV
DD
= 3V, CH x+ = 0.5V to 4.5V, CH x− = 2.5V, REFIN = REFOUT = internal +2.5V, CLKIN = 20MHz, and 16-bit Sinc
3
filter with
decimation by 256, unless otherwise noted.
Figure 8
OFFSET vs POWER SUPPLY
4.50 4.75 5.00 5.25 5.50
Power Supply (V)
Offset (mV)
−
0.8
−
1.0
−
1.2
−
1.4
−
1.6
CLKIN = 32MHz
CLKIN = 20MHz
Figure 9
REFERENCE VOLTAGE vs TEMPERATURE
60
−
40
−
20 20 40080100
Tem pe rat ure (
_
C)
V
REF
(V)
2.510
2.508
2.506
2.504
2.502
2.500
2.498
2.496
2.494
2.492
2.490
Figure 10
GAIN vs TEMPERATURE
60
−
40
−
20 20 400 80 100
Temperature (
_
C)
Gain (%)
0.25
0.20
0.15
0.10
0.05
0
−
0.05
−
0.10
−
0.15
−
0.20
−
0.25
CLKIN = 32MHz
CLKIN = 20MHz
Figure 11
GAIN MATCH vs TEMPERATURE
60
−
40
−
20 20 40080100
Temperature (
_
C)
Gain Match (%)
0.125
0.120
0.115
0.110
0.105
0.100
0.095
0.090
0.085
0.080
0.075
CLKIN = 20MHz
CLKIN = 32MHz
Figure 12
SIGNAL−TO−NOISE RATIO
vs TEMPERATURE
60
−
40
−
20 20 400 80 100
Temperature (
_
C)
SNR (dB)
89.0
88.9
88.8
88.7
88.6
88.5
88.4
88.3
88.2
88.1
88.0
CLKIN = 32MHz
4V
PP
5kHz
CLKIN = 20MHz
Figure 13
SIGNAL−TO−NOISE + DISTORTION
vs TEMPERATURE
60
−
40
−
20 20 400 80 100
Temperature (
_
C)
SINAD (dB)
89.2
89.0
88.8
88.6
88.4
88.2
88.0
87.8
87.6
CLKIN = 32MHz
CLKIN = 20MHz
4V
PP
5kHz