<nobr id="nklri"></nobr>
<big id="nklri"></big>
  • <rt id="nklri"><font id="nklri"></font></rt>
    參數(shù)資料
    型號: LTC2449
    廠商: Linear Technology Corporation
    英文描述: 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution
    中文描述: 24位ADC的高速8-/16-Channel可選速度/分辨率
    文件頁數(shù): 25/28頁
    文件大?。?/td> 270K
    代理商: LTC2449
    LTC2444/LTC2445/
    LTC2448/LTC2449
    25
    sn2444589 2444589fs
    First Notch Frequency
    This is the first notch in the SINC
    4
    portion of the digital
    filter and depends on the f
    o
    clock frequency and the
    oversample ratio. Rejection at this frequency and its
    multiples (up to the modulator sample rate of 1.8MHz)
    exceeds 120dB. This is 8 times the maximum conversion
    rate.
    Effective Noise Bandwidth
    The LTC2444/LTC2445/LTC2448/LTC2449 has extremely
    good input noise rejection from the first notch frequency
    all the way out to the modulator sample rate (typically
    1.8MHz). Effective noise bandwidth is a measure of how
    the ADC will reject wideband input noise up to the modu-
    lator sample rate. The example on the following page
    shows how the noise rejection of the LTC2444/LTC2445/
    LTC2448/LTC2449 reduces the effective noise of an am-
    plifier driving its input.
    Table 8
    Over-
    sample
    Ratio LTC2444/ LTC2445/ LTC2444/ LTC2445/
    (OSR) LTC2448 LTC2449 LTC2449 LTC2449
    64
    23
    μ
    V
    23
    μ
    V
    128
    4.5
    μ
    V
    3.5
    μ
    V
    256
    2.8
    μ
    V
    2
    μ
    V
    512
    2
    μ
    V
    1.4
    μ
    V
    1024
    1.4
    μ
    V
    1
    μ
    V
    2048
    1.1
    μ
    V
    750nV
    4096
    720nV
    510nV
    8192
    530nV
    375nV
    16384
    350nV
    250nV
    32768
    280nV
    200nV
    *RMS
    Noise
    *RMS
    Noise
    ENOB
    (V
    REF
    = 5V)
    Maximum
    Conversion Rate
    Internal
    9MHz clock
    3515.6
    1757.8
    878.9
    439.5
    219.7
    109.9
    54.9
    27.5
    13.7
    6.9
    First Notch
    Frequency
    Internal
    9MHz clock
    28125
    14062.5
    7031.3
    3515.6
    1757.8
    878.9
    439.5
    219.7
    109.9
    54.9
    Effective
    Noise BW
    Internal
    9MHz clock
    3148
    1574
    787
    394
    197
    98.4
    49.2
    24.6
    12.4
    6.2
    –3dB
    point (Hz)
    Internal
    9MHz clock
    1696
    848
    424
    212
    106
    53
    26.5
    13.2
    6.6
    3.3
    External
    f
    o
    f
    o
    /2560
    f
    o
    /5120
    f
    o
    /10240
    f
    o
    /20480
    f
    o
    /40960
    f
    o
    /81920
    f
    o
    /163840
    f
    o
    /327680
    f
    o
    /655360
    f
    o
    /1310720
    External
    f
    o
    f
    o
    /320
    f
    o
    /640
    f
    o
    /1280
    f
    o
    /2560
    f
    o
    /5120
    f
    o
    /1020
    f
    o
    /2050
    f
    o
    /4100
    f
    o
    /8190
    f
    o
    /16380
    External
    f
    o
    f
    o
    /5710
    f
    o
    /2860
    f
    o
    /1140
    f
    o
    /2280
    f
    o
    /4570
    f
    o
    /9140
    f
    o
    /18300
    f
    o
    /36600
    f
    o
    /73100
    f
    o
    /146300
    External
    f
    o
    f
    o
    /5310
    f
    o
    /10600
    f
    o
    /21200
    f
    o
    /42500
    f
    o
    /84900
    f
    o
    /170000
    f
    o
    /340000
    f
    o
    /679000
    f
    o
    /1358000
    f
    o
    /2717000
    17
    20.1
    20.8
    21.3
    21.8
    22.1
    22.7
    23.2
    23.8
    24.1
    17
    20
    21.3
    21.8
    22.4
    22.9
    23.4
    24
    24.4
    24.6
    Input Bandwidth and Frequency Rejection
    The combined effect of the internal SINC
    4
    digital filter and
    the digital and analog autocalibration circuits determines
    the LTC2444/LTC2445/LTC2448/LTC2449 input band-
    width and rejection characteristics. The digital filter’s
    response can be adjusted by setting the oversample ratio
    (OSR) through the SPI interface or by supplying an exter-
    nal conversion clock to the f
    o
    pin.
    Table 8 lists the properties of the LTC2444/LTC2445/
    LTC2448/LTC2449 with various combinations of
    oversample ratio and clock frequency. Understanding
    these properties is the key to fine tuning the characteris-
    tics of the LTC2444/LTC2445/LTC2448/LTC2449 to the
    application.
    Maximum Conversion Rate
    The maximum conversion rate is the fastest possible rate
    at which conversions can be performed.
    APPLICATIU
    W
    U
    U
    *ADC noise increases by approximately
    2 when OSR is decreased by a factor of 2 for OSR 32768 to OSR 256. The ADC noise at OSR 128 and OSR 64 include effects from internal modulator quantization
    noise.
    相關PDF資料
    PDF描述
    LTC2449C 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution
    LTC2449CUHF 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution
    LTC2449I 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution
    LTC2449IUHF 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution
    LTC2450CDCTRMPBF Easy-to-Use, Ultra-Tiny 16-Bit ADC
    相關代理商/技術參數(shù)
    參數(shù)描述
    LTC2449CUHF 功能描述:IC ADC 24BIT HI SPEED 38QFN 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) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端,單極
    LTC2449CUHF#PBF 功能描述:IC ADC 24BIT 38-QFN 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 供應商設備封裝: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
    LTC2449CUHF#PBF 制造商:Linear Technology 功能描述:IC, ADC, 24BIT, 8KHZ, QFN-38
    LTC2449CUHF#TR 功能描述:IC ADC 24BIT HI SPEED 38QFN 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) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端,單極
    LTC2449CUHF#TRPBF 功能描述:IC ADC 24BIT HI SPEED 38QFN 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) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端,單極