Datasheet

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SBAS312B − JANUARY 2005 − REVISED AUGUST 2007
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8
TYPICAL CHARACTERISTICS
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 2
INTEGRAL NONLINEARITY vs INPUT SIGNAL
(CLKIN = 20MHz)
0−2.5 −2.0 −1.0 −0.5−1.5 0.5 1.5 2.01.0 2.5
Differential Input Voltage (V)
INL (LSB)
1.7
1.2
0.70
0.20
−0.3
−0.8
−1.3
−1.8
INL (%)
0.00259
0.00183
0.00107
0.00031
−0.00046
−0.00122
−0.00198
−0.00275
−40_C
+85_ C
+25_C
Figure 3
INTEGRAL NONLINEARITY vs INPUT SIGNAL
(CLKIN = 32MHz)
0−2.5 −2.0 −1.0 −0.5−1.5 0.5 1.5 2.01.0 2.5
Differential Input Voltage (V)
−40_ C
+25_ C
+85_C
INL (LSB)
1.7
1.2
0.70
0.20
−0.3
−0.8
−1.3
−1.8
INL (%)
0.00259
0.00183
0.00107
0.00031
−0.00046
−0.00122
−0.00198
−0.00275
Figure 4
INTEGRAL LINEARITY MATCH OF CHANNELS
vs INPUT SIGNAL
0−2.5 −2.0 −1.0 −0.5−1.5 0.5 1.5 2.01.0 2.5
Differential Input Voltage (V)
INL (LSB)
0.4
0.3
0.2
0.1
0
−0.1
−0.2
−
0.3
−0.4
INL (%)
0.00061
0.00046
0.00031
0.00015
0
−0.00015
−0.00031
−
0.00046
−0.00061
CLKIN = 32MHz
CLKIN = 20MHz
Figure 5
INTEGRAL LINEARITY vs TEMPERATURE
60−40 −20 20 40080100
Temperature (_C)
INL (LSB)
0
−0.2
−
0.4
−0.6
−0.8
−1.0
−1.2
−
1.4
−1.6
INL (%)
0
−0.00031
−
0.00061
−0.00092
−0.00122
−0.00153
−0.00183
−
0.00214
−0.00244
CLKIN = 32MHz
CLKIN = 20MHz
Figure 6
OFFSET vs TEMPERATURE
60
−
40
−
20 20 400 80 100
Temperature (
_
C)
Offset (mV)
−
1.0
−
1.05
−
1.10
−
1.15
−
1.20
−
1.25
−
1.30
CLKIN = 20MHz
CLKIN = 32MHz
Figure 7
OFFSET MATCH vs TEMPERATURE
60
−
40
−
20 20 40080100
Temperature (
_
C)
Offset Match (mV)
0.15
0.14
0.13
0.12
0.11
0.10
0.09
0.08
0.07
0.06
0.05
CLKIN = 32MHz
CLKIN = 20MHz