參數(shù)資料
型號: LTC2492IDE
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: 4-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO14
封裝: 4 X 3 MM, PLASTIC, MO-229WGED-3, QFN-14
文件頁數(shù): 16/36頁
文件大?。?/td> 652K
代理商: LTC2492IDE
LTC2492
2492fa
VCC
FO
SCK
SDI
GND
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2492
3-WIRE
SPI INTERFACE
EOC
CS
SCK
(EXTERNAL)
SDI
SDO
2492 F08
CONVERSION
SLEEP
DATA INPUT/OUTPUT
BIT 28 BIT 27 BIT 26 BIT 25 BIT 24 BIT 23 BIT 22 BIT 21 BIT 20 BIT 19
BIT 29
BIT 30
BIT 31
1
0
EN
SGL
A2
A1
A0
EN2
IM
FA
FB
SPD
ODD
BIT 18 BIT 17
BIT 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
32
DON'T CARE
MSB
SIG
“0”
REF+
REF
CH0
CH1
CH2
CH3
COM
SDO
12
1
13
14
8
9
10
11
7
3
5
6
4
2
2.7V TO 5.5V
0.1
F
10
F
CS
CONVERSION
applicaTions inFormaTion
Figure 8. External Serial Clock, 3-Wire Operation (`C`S = 0)
On the falling edge of EOC, the conversion result is load-
ing into an internal static shift register. The output data
can now be shifted out the SDO pin under control of the
externally applied SCk signal. Data is updated on the fall-
ing edge of SCk. The input data is shifted into the device
through the SDI pin on the rising edge of SCk. On the
32nd falling edge of SCk, SDO goes HIGH, indicating a
new conversion has begun. This data now serves as EOC
for the next conversion.
Internal Serial Clock, Single Cycle Operation
This timing mode uses the internal serial clock to shift out
the conversion result and CS to monitor and control the
state of the conversion cycle (see Figure 9).
In order to select the internal serial clock timing mode,
the serial clock pin (SCk) must be floating or pulled HIGH
before the conclusion of the POR cycle and prior to each
fallingedgeofCS.Aninternalweakpull-upresistorisactive
on the SCk pin during the falling edge of CS; therefore,
the internal SCk mode is automatically selected if SCk is
not externally driven.
The serial data output pin (SDO) is Hi-Z as long as CS is
HIGH. At any time during the conversion cycle, CS may be
pulled low in order to monitor the state of the converter.
Once CS is pulled LOW, SCk goes LOW and EOC is output
to the SDO pin. EOC = 1 while the conversion is in progress
and EOC = 0 if the device is in the sleep state.
When testing EOC, if the conversion is complete (EOC =
0), the device will exit sleep state. In order to return to the
sleepstateandreducethepowerconsumption,CSmustbe
pulled HIGH before the device pulls SCk HIGH. When the
device is using its own internal oscillator (FO is tied LOW),
the first rising edge of SCk occurs 12s (tEOCTEST = 12s)
after the falling edge of CS. If FO is driven by an external
oscillator of frequency fEOSC, then tEOCTEST = 3.6/fEOSC.
If CS remains LOW longer than tEOCTEST, the first rising
edge of SCk will occur and the conversion result is shifted
out the SDO pin on the falling edge of SCk. The serial
input word (SDI) is shifted into the device on the rising
edge of SCk.
After the 32nd rising edge of SCk a new conversion au-
tomatically begins. SDO goes HIGH (EOC = 1) and SCk
相關(guān)PDF資料
PDF描述
LTC2492IDE#TR 4-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO14
LTC2494CUHF 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38
LTC2494IUHF#TR 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38
LTC2494IUHF 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38
LTC2494CUHF#TR 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2492IDE#PBF 功能描述:IC ADC 24BIT DELTA SIG 14-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
LTC2492IDE#TRPBF 功能描述:IC ADC 24BIT DELTA SIG 14-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:1,000 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
LTC2493CDE#PBF 功能描述:IC ADC 24BIT DELTA SIG 14-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: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 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:38-QFN(5x7) 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個單端,雙極;8 個差分,雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
LTC2493CDE#TRPBF 功能描述:IC ADC 24BIT DELTA SIG 14-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: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 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:38-QFN(5x7) 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個單端,雙極;8 個差分,雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
LTC2493CDEPBF 制造商:Linear Technology 功能描述:24bit Delta Sigma ADC Temp Sens LTC2493