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參數(shù)資料
型號： LTC2483IDD#TRPBF
廠商： Linear Technology
文件頁數(shù)： 13/34頁
文件大?。?/td> 0K
描述： IC ADC 16BIT I2C 10-DFN
標(biāo)準(zhǔn)包裝： 2,500
位數(shù)： 16
采樣率（每秒）： 6.8
數(shù)據(jù)接口： I²C，串行
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 480µW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 10-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 10-DFN（3x3）
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 1 個差分，雙極
配用： DC955A-ND - BOARD DELTA SIGMA ADC LTC2483
LTC2483
0
2483fc
gain performance without significant benefits of reference
filtering and the user is advised to avoid them.
Larger values of reference capacitors (CREF > 1nF) may be
requiredasreferencefiltersincertainconfigurations.Such
capacitors will average the reference sampling charge and
the external source resistance will see a quasi constant
reference differential impedance.
In the following discussion, it is assumed the input and
reference common mode are the same. For the internal
oscillator, the related difference resistance is 1.1MΩ and
applicaTions inFormaTion
Figure 11. +FS Error vs RSOURCE at REF+ or REF– (Small CREF)
RSOURCE ()
0
+FS
ERROR
(ppm)
50
70
90
10k
2483 F11
30
10
40
60
80
20
0
–10
10
100
1k
100k
VCC = 5V
VREF = 5V
VIN+ = 3.75V
VIN– = 1.25V
TA = 25°C
CREF = 0.01F
CREF = 0.001F
CREF = 100pF
CREF = 0pF
the resulting full-scale error is 0.46ppm for each ohm of
source resistance driving the REF+ and REF– pins. When
CA0/F0 is driven by an external oscillator with a frequency
fEOSC (external conversion clock operation), the typical
differential reference resistance is 0.30 1012/fEOSC Ω
and each ohm of source resistance driving the REF+ or
REF– pins will result in 1.67 10–6 fEOSCppm gain error.
The typical +FS and –FS errors for various combinations
of source resistance seen by the REF+ or REF– pins and
external capacitance connected to that pin are shown in
Figures 11-14.
Figure 12. –FS Error vs RSOURCE at REF+ or REF– (Small CREF)
RSOURCE ()
0
–FS
ERROR
(ppm) –30
–10
10
10k
2483 F12
–50
–70
–40
–20
0
–60
–80
–90
10
100
1k
100k
VCC = 5V
VREF = 5V
VIN+ = 1.25V
VIN– = 3.75V
TA = 25°C
CREF = 0.01F
CREF = 0.001F
CREF = 100pF
CREF = 0pF
Figure 13. +FS Error vs RSOURCE at REF+ or REF– (Large CREF)
RSOURCE ()
0
+FS
ERROR
(ppm) 300
400
500
800
2483 F13
200
100
0
200
400
600
1000
VCC = 5V
VREF = 5V
VIN+ = 3.75V
VIN– = 1.25V
TA = 25°C
CREF = 1F, 10F
CREF = 0.1F
CREF = 0.01F
Figure 14. –FS Error vs RSOURCE at REF+ or REF– (Large CREF)
RSOURCE ()
0
–FS
ERROR
(ppm) –200
–100
0
800
2483 F14
–300
–400
–500
200
400
600
1000
VCC = 5V
VREF = 5V
VIN+ = 1.25V
VIN– = 3.75V
TA = 25°C
CREF = 1F, 10F
CREF = 0.1F
CREF = 0.01F
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