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參數(shù)資料
| 型號： | LTC2418CGN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 8-/16-Channel 24-Bit No Latency TM ADCs |
| 中文描述： | 16-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28 |
| 封裝： | 0.150 INCH, PLASTIC, SSOP-28 |
| 文件頁數(shù)： | 28/48頁 |
| 文件大小： | 775K |
| 代理商： | LTC2418CGN |
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LTC2414/LTC2418
28
241418fa
R
SOURCE
(
)
0 100 200 300 400 500 600 700 800 9001000
+
R
)
2414/18 F15
300
240
180
120
60
0
V
= 5V
REF
+
= 5V
REF
–
= GND
IN
+
= 3.75V
IN
–
= 1.25V
F
O
= GND
T
A
= 25
°
C
C
IN
= 0.01
μ
F
C
IN
= 0.1
μ
F
C
IN
= 1
μ
F, 10
μ
F
R
SOURCE
(
)
0 100 200 300 400 500 600 700 800 9001000
–
R
)
2414/18 F16
0
–60
–120
–180
–240
–300
V
= 5V
REF
= 5V
REF
–
= GND
IN
+
= 1.25V
IN
–
= 3.75V
F
O
= GND
T
A
= 25
°
C
C
IN
= 0.01
μ
F
C
IN
= 0.1
μ
F
C
IN
= 1
μ
F, 10
μ
F
V
INCM
(V)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
O
R
)
2414/18 F17
120
100
80
60
40
20
0
–20
–40
–60
–80
–100
–120
F
O
= GND
T
A
= 25
°
C
R
SOURCEIN
– = 500
C
IN
F
V
CC
= 5V
REF
= 5V
REF
–
= GND
IN
+
= IN
–
= V
INCM
A:
R
IN
= +400
B:
R
IN
= +200
C:
R
IN
= +100
D:
R
IN
= 0
E:
R
IN
= –100
F:
R
IN
= –200
G:
R
IN
= –400
A
B
C
D
E
F
G
Figure 15. +FS Error vs R
SOURCE
at IN
+
or IN
–
(Large C
IN
)
Figure 16. –FS Error vs R
SOURCE
at IN
+
or IN
–
(Large C
IN
)
Figure 17. Offset Error vs Common Mode Voltage
(V
INCM
= IN
+
= IN
–
) and Input Source Resistance Imbalance
(
R
IN
= R
SOURCEIN
+ – R
SOURCEIN
–) for Large C
IN
Values (C
IN
≥
1
μ
F)
APPLICATIOU
W
U
U
1.78 10
–6
f
EOSC
ppm. Figure 17 shows the typical offset
error due to input common mode voltage for various
values of source resistance imbalance between the IN
+
and IN
–
pins when large C
IN
values are used.
If possible, it is desirable to operate with the input signal
common mode voltage very close to the reference signal
common mode voltage as is the case in the ratiometric
measurement of a symmetric bridge. This configuration
eliminates the offset error caused by mismatched source
impedances.
The magnitude of the dynamic input current depends upon
the size of the very stable internal sampling capacitors and
upon the accuracy of the converter sampling clock. The
accuracy of the internal clock over the entire temperature
and power supply range is typical better than 0.5%. Such
a specification can also be easily achieved by an external
clock. When relatively stable resistors (50ppm/
°
C) are
used for the external source impedance seen by IN
+
and
IN
–
, the expected drift of the dynamic current, offset and
gain errors will be insignificant (about 1% of their respec-
tive values over the entire temperature and voltage range).
Even for the most stringent applications, a one-time
calibration operation may be sufficient.
In addition to the input sampling charge, the input ESD
protection diodes have a temperature dependent leakage
current. This current, nominally 1nA (
±
10nA max), results
in a small offset shift. A 100
source resistance will create
a 0.1
μ
V typical and 1
μ
V maximum offset voltage.
Reference Current
In a similar fashion, the LTC2414/LTC2418 samples the
differential reference pins REF
+
and REF
–
transferring
small amount of charge to and from the external driving
circuits thus producing a dynamic reference current. This
current does not change the converter offset, but it may
degrade the gain and INL performance. The effect of this
current can be analyzed in the same two distinct situa-
tions.
For relatively small values of the external reference capaci-
tors (C
REF
< 0.01
μ
F), the voltage on the sampling capacitor
settles almost completely and relatively large values for
the source impedance result in only small errors. Such
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相關(guān)代理商/技術(shù)參數(shù) |
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| LTC2418CGN#PBF | 功能描述:IC ADC 24BIT DIFF INPUT 28SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| LTC2418CGN#PBF | 制造商:Linear Technology 功能描述:IC ADC 24BIT SSOP-28 |
| LTC2418CGN#TR | 功能描述:IC ADC 24BIT DIFF INPUT 28SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| LTC2418CGN#TRPBF | 功能描述:IC ADC 24BIT DIFF INPUT 28SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| LTC2418CGNPBF | 制造商:Linear Technology 功能描述:ADC,LTC2418C 24bit D-S 16 ch SPI SSOP |
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