參數(shù)資料
型號： LTC2410
廠商： Linear Technology Corporation
英文描述： 20-Bit Universal Bus Driver With 3-State Outputs 56-SSOP -40 to 85
中文描述： 24位無與差分輸入和差分ADC的參考延遲
文件頁數(shù)： 24/44頁
文件大?。?/td> 778K
代理商： LTC2410
LTC2410
24
APPLICATIU
REF
+
and REF
–
pins and external capacitance C
REF
con-
nected to these pins are shown in Figures 22, 23, 24
and25.
In addition to this gain error, the converter INL perfor-
mance is degraded by the reference source impedance.
When F
O
= LOW (internal oscillator and 60Hz notch), every
100
of source resistance driving REF
+
or REF
–
translates
into about 1.34ppm additional INL error. When F
O
= HIGH
(internal oscillator and 50Hz notch), every 100
of source
resistance driving REF
+
or REF
–
translates into about
1.1ppm additional INL error. When F
O
is driven by an
W
U
U
external oscillator with a frequency f
EOSC
, every 100
of
source resistance driving REF
+
or REF
–
translates into
about 8.73 10
–6
f
EOSC
ppm additional INL error.
Figure26 shows the typical INL error due to the source
resistance driving the REF
+
or REF
–
pins when large C
REF
values are used. The effect of the source resistance on the
two reference pins is additive with respect to this INL error.
In general, matching of source impedance for the REF
+
and REF
–
pins does not help the gain or the INL error. The
user is thus advised to minimize the combined source
impedance driving the REF
+
and REF
–
pins rather than to
try to match it.
Figure 22. +FS Error vs R
SOURCE
at REF
+
or REF
–
(Small C
IN
)
Figure 23. –FS Error vs R
SOURCE
at REF
+
or REF
–
(Small C
IN
)
Figure 24. +FS Error vs R
SOURCE
at REF
+
and REF
–
(Large C
REF
)
Figure 25. –FS Error vs R
SOURCE
at REF
+
and REF
–
(Large C
REF
)
R
SOURCE
(
)
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
+
R
)
2410 F22
0
–10
–20
–30
–40
–50
V
= 5V
REF
+
= 5V
REF
–
= GND
IN
+
= 5V
IN
–
= 2.5V
F
O
= GND
T
A
= 25
°
C
C
REF
= 0.01
μ
F
C
REF
= 0.001
μ
F
C
REF
= 100pF
C
REF
= 0pF
R
SOURCE
(
)
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
–
R
)
2410 F23
50
40
30
20
10
0
V
CC
= 5V
REF
+
= 5V
REF
–
= GND
IN
+
= GND
IN
–
= 2.5V
F
O
= GND
T
A
= 25
°
C
C
REF
= 0.01
μ
F
C
REF
= 0.001
μ
F
C
REF
= 100pF
C
REF
= 0pF
R
SOURCE
(
)
0 100 200 300 400 500 600 700 800 9001000
+
R
)
2410 F24
0
–90
–180
–270
–360
–450
V
= 5V
REF
= 5V
REF
–
= GND
IN
+
= 3.75V
IN
–
= 1.25V
F
O
= GND
T
A
= 25
°
C
C
REF
= 0.01
μ
F
C
REF
= 0.1
μ
F
C
REF
= 1
μ
F, 10
μ
F
R
SOURCE
(
)
0 100 200 300 400 500 600 700 800 9001000
+
R
)
2410 F25
450
360
270
180
90
0
V
CC
= 5V
REF
+
= 5V
REF
–
= GND
IN
+
= 1.25V
IN
–
= 3.75V
F
O
= GND
T
A
= 25
°
C
C
REF
= 0.01
μ
F
C
REF
= 0.1
μ
F
C
REF
= 1
μ
F, 10
μ
F
相關(guān)PDF資料
PDF描述
LTC2410C 20-Bit Universal Bus Driver With 3-State Outputs 56-TVSOP -40 to 85
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LTC2413CGN 24-Bit No Latency ADC, with Simultaneous 50Hz/60Hz Rejection
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