參數(shù)資料
型號(hào)： LTC2494CUHF#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： ADC
英文描述： 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38
封裝： 5 X 7 MM, PLASTIC, MO-220WKHD, QFN-38
文件頁(yè)數(shù)： 9/36頁(yè)
文件大?。?/td> 675K
代理商： LTC2494CUHF#TR
LTC2494
2494fa
applicaTions inFormaTion
INPUT DATA FORMAT
The LTC2494 serial input word is 16 bits long and contains
two distinct sets of data. The first set (SGL, ODD, A2, A1,
A0) is used to select the input channel. The second set of
data (IM, FA, FB, SPD, GS2, GS1, GS0) is used to select
the frequency rejection, speed mode (1x, 2x), temperature
measurement, and gain.
After power up, the device initiates an internal reset cycle
whichsetstheinputchanneltoCH0–CH1(IN+=CH0,IN–=
CH1),thefrequencyrejectiontosimultaneous50Hz/60Hz,
1xoutputrate(auto-calibrationenabled),andgain=1.The
firstconversionautomaticallybeginsatpowerupusingthis
default configuration. Once the conversion is complete, a
new word may be written into the device.
The first three bits shifted into the device consist of two
preamble bits and an enable bit. These bits are used to
enable the device configuration and input channel selec-
tion. Valid settings for these three bits are 000, 100 and
101. Other combinations should be avoided. If the first
three bits are 000 or 100, the following data is ignored
(don’t care) and the previously selected input channel and
configuration remain valid for the next conversion.
If the first three bits shifted into the device are 101, then
the next five bits select the input channel for the next
conversion cycle (see Table 3).
The first input bit following the 101 sequence (SGL) de-
termines if the input selection is differential (SGL = 0) or
single-ended(SGL=1).ForSGL=0,twoadjacentchannels
canbeselectedtoformadifferentialinput.ForSGL=1,one
of16channelsisselectedasthepositiveinput.Thenegative
inputisCOMforallsingleendedoperations.Theremaining
4bits(ODD,A2,A1,A0)determinewhichchannel(s)is/are
selected and the polarity (for a differential input).
The next serial input bit immediately following the input
channel selection is the enable bit for the conversion
configuration (EN2). If this bit is set to 0, then the next
conversion is performed using the previously selected
converter configuration. This is useful in systems using
the same rejection/speed for all input channels and for
backwardcompatibilitywiththeLTC2418/LTC2414families
of delta sigma ADCs.
The second set of configuration data can be loaded into the
device by setting EN2 = 1 (see Table 4). The first bit (IM)
is used to select the internal temperature sensor. If IM = 1,
the following conversion will be performed on the internal
temperaturesensorratherthantheselectedinputchannel.
The next 2 bits (FA and FB) are used to set the rejection
frequency. The next bit (SPD) is used to select either the
1x output rate if SPD = 0 (auto-calibration is enabled and
the offset is continuously calibrated and removed from
the final conversion result) or the 2x output rate if SPD
= 1 (offset calibration disabled, multiplexing output rates
up to 15Hz with no latency). When IM = 1 (temperature
measurement), SPD, GS2, GS1, GS0 will be ignored and
the device will operate in 1x mode. The final 3 bits (GS2,
Table 2. LTC2494 Output Data Format
DIFFERENTIAL INPUT VOLTAGE
VIN*
BIT 23
EOC
BIT 22
DMY
BIT 21
SIG
BIT 20
MSB
BIT 19
BIT 18
BIT 17
…
BIT 4
BITS 3 TO 0
VIN* ≥ FS**
0
1
0
…
0
0000
FS** – 1LSB
0
1
0
1
…
1
0000
0.5 FS**
0
1
0
1
0
…
0
0000
0.5 FS** – 1LSB
0
1
0
1
…
1
0000
0
1
0
…
0
0000
–1LSB
0
1
…
1
0000
–0.5 FS**
0
1
0
…
0
0000
–0.5 FS** – 1LSB
0
1
0
1
…
1
0000
–FS**
0
1
0
…
0
0000
VIN* < –FS**
0
1
…
1
0000
*The differential input voltage VIN = IN+ – IN–. **The full-scale voltage FS = 0.5 VREF/Gain.
相關(guān)PDF資料
PDF描述
LTC2495IUHF#TR 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38
LTC2495CUHF#TR 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38
LTC2615IGN#TR SERIAL INPUT LOADING, 9 us SETTLING TIME, 14-BIT DAC, PDSO16
LTC2620CUFD#PBF SERIAL INPUT LOADING, 7 us SETTLING TIME, 12-BIT DAC, PQCC20
LTC2600CUFD#PBF SERIAL INPUT LOADING, 10 us SETTLING TIME, 16-BIT DAC, PQCC20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2494IUHF#PBF 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 類(lèi)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(lèi)型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤(pán)（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類(lèi)型:8 個(gè)單端，單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱(chēng):296-25851-6
LTC2494IUHF#TRPBF 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 類(lèi)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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 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(lèi)型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類(lèi)型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
LTC2495CUHF 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 15sps 16-bit Serial 38-Pin QFN EP
LTC2495CUHF#PBF 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 類(lèi)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:1,000 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(lèi)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(lèi)型:2 個(gè)單端，單極
LTC2495CUHF#TRPBF 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 類(lèi)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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 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(lèi)型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類(lèi)型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*