(300°K), with a slope of 93.5V/°C independent of V
參數(shù)資料
型號: LTC2495IUHF#PBF
廠商: Linear Technology
文件頁數(shù): 14/34頁
文件大?。?/td> 0K
描述: IC ADC 16BIT W/PGA 38-QFN
標準包裝: 52
位數(shù): 16
采樣率(每秒): 15
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: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 38-WFQFN 裸露焊盤
供應商設(shè)備封裝: 38-QFN(5x7)
包裝: 管件
輸入數(shù)目和類型: 16 個單端,雙極;8 個差分,雙極
產(chǎn)品目錄頁面: 1348 (CN2011-ZH PDF)
配用: DC1012A-C-ND - BOARD DELTA SIGMA ADC LTC2495
LTC2495
2495fd
The internal temperature sensor output is 28mV at 27°C
(300°K), with a slope of 93.5V/°C independent of VREF
(see Figures 4 and 5). Slope calibration is not required if
the reference voltage (VREF) is known. A 5V reference has
a slope of 2.45 LSBs16/°C. The temperature is calculated
from the output code (where DATAOUT16 is the decimal
representationofthe16-bitresult)fora5Vreferenceusing
the following formula:
T
DATAOUT
in Kelvin
K =
16
2 45
.
If a different value of VREF is used, the temperature
output is:
T
DATAOUT
V
in Kelvin
K
REF
=
16
12 25
.
If the value of VREF is not known, the slope is determined
bymeasuringthetemperaturesensorataknowntempera-
ture TN (in K) and using the following formula:
SLOPE
DATAOUT
TN
=
16
This value of slope can be used to calculate further tem-
perature readings using:
T
DATAOUT
SLOPE
K =
16
All Kelvin temperature readings can be converted to TC
(°C) using the fundamental equation:
TC = TK – 273
Initiating a New Conversion
When the LTC2495 finishes a conversion, it automatically
enters the sleep state. Once in the sleep state, the device is
ready for a read operation. After the device acknowledges
a read request, the device exits the sleep state and enters
the data output state. The data output state concludes
and the LTC2495 starts a new conversion once a STOP
condition is issued by the master or all 24 bits of data are
read out of the device.
Duringthedatareadcycle,aSTOPcommandmaybeissued
by the master controller in order to start a new conversion
and abort the data transfer. This STOP command must be
issued during the ninth clock cycle of a byte read when
the bus is free (the ACK/NACK cycle).
LTC2495 Address
The LTC2495 has three address pins (CA0, CA1, CA2).
Each may be tied HIGH, LOW, or left floating enabling one
of 27 possible addresses (see Table 6).
In addition to the configurable addresses listed in Table 6,
the LTC2495 also contains a global address (1110111)
whichmaybeusedforsynchronizingmultipleLTC2495sor
otherLTC24XXdelta-sigmaI2Cdevices(seeSynchronizing
Multiple LTC2495s with a Global Address Call section).
applications inForMation
Figure 4. Internal PTAT Digital Output vs Temperature
Figure 5. Absolute Temperature Error
TEMPERATURE (K)
0
DA
TAOUT
16
450
600
750
900
1050
400
2495 F04
300
0
300
200
100
150
VCC = 5V
VREF = 5V
SLOPE = 2.45 LSB16/K
TEMPERATURE (°C)
–55 –30
–5
ABSOLUTE
ERROR
(°C)
5
4
3
2
1
–4
–3
–2
–1
0
120
95
70
45
20
2495 F05
–5
相關(guān)PDF資料
PDF描述
LTC2494IUHF#PBF IC ADC 16BIT W/PGA 38-QFN
VE-272-IX-B1 CONVERTER MOD DC/DC 15V 75W
VI-JWJ-MY-F4 CONVERTER MOD DC/DC 36V 50W
LT1017IS8 IC COMPARATOR MICRPWR DUAL 8SOIC
AD7321BRUZ IC ADC 12BIT+ SAR 2CHAN 14TSSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2496CUHF#PBF 功能描述:IC ADC 16BIT DELTA SIG 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(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
LTC2496CUHF#TRPBF 功能描述:IC ADC 16BIT DELTA SIG 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: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
LTC2496IUHF#PBF 功能描述:IC ADC 16BIT DELTA SIG 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: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
LTC2496IUHF#TRPBF 功能描述:IC ADC 16BIT DELTA SIG 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: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
LTC2497CUHF#PBF 功能描述:IC ADC 16BIT W/PGA 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(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