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參數(shù)資料
| 型號： | LTC2485CDD#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 24/40頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 24BIT I2C 10-DFN |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 位數(shù)： | 24 |
| 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： | 0°C ~ 70°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： | DC956A-ND - BOARD DELTA SIGMA ADC LTC2485 |
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LTC2485
30
2485fc
APPLICATIONS INFORMATION
The user can expect to achieve this level of performance
using the internal oscillator as it is demonstrated by
Figures 35, 36 and 37. Typical measured values of the
normal mode rejection of the LTC2485 operating with an
internal oscillator and a 60Hz notch setting are shown in
Figure 35 superimposed over the theoretical calculated
curve. Similarly, the measured normal mode rejection of
the LTC2485 for the 50Hz rejection mode and 50Hz/60Hz
rejection mode are shown in Figures 36 and 37.
As a result of these remarkable normal mode specica-
tions, minimal (if any) antialias ltering is required in front
of the LTC2485. If passive RC components are placed in
front of the LTC2485, the input dynamic current should
be considered (see Input Current section). In this case,
the differential input current cancellation feature of the
LTC2485 allows external RC networks without signicant
degradation in DC performance.
Traditional high order delta-sigma modulators, while
providing very good linearity and resolution, suffer
from potential instabilities at large input signal levels.
The proprietary architecture used for the LTC2485 third
order modulator resolves this problem and guarantees a
predictable stable behavior at input signal levels of up to
150% of full-scale. In many industrial applications, it is
not uncommon to have to measure microvolt level signals
superimposed on volt level perturbations and the LTC2485
is eminently suited for such tasks. When the perturbation
is differential, the specication of interest is the normal
mode rejection for large input signal levels. With a refer-
ence voltage VREF = 5V, the LTC2485 has a full-scale dif-
ferential input range of 5V peak-to-peak. Figures 38 and
39 show measurement results for the LTC2485 normal
mode rejection ratio with a 7.5V peak-to-peak (150% of
full scale) input signal superimposed over the more tradi-
tional normal mode rejection ratio results obtained with a
5V peak-to-peak (full-scale) input signal. In Figure 38, the
LTC2485 uses the internal oscillator with the notch set at
60Hz and in Figure 39 it uses the internal oscillator with
the notch set at 50Hz. It is clear that the LTC2485 rejection
performance is maintained with no compromises in this
extreme situation. When operating with large input signal
levels, the user must observe that such signals do not
violate the device absolute maximum ratings.
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| LTC2485IDD#PBF | 功能描述:IC ADC 24BIT I2C 10-DFN 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(biāo)準(zhǔn)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 |
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