參數資料
型號: LTC2418CGN#PBF
廠商: Linear Technology
文件頁數: 36/48頁
文件大小: 0K
描述: IC ADC 24BIT DIFF INPUT 28SSOP
標準包裝: 49
位數: 24
采樣率(每秒): 7.5
數據接口: MICROWIRE?,串行,SPI?
轉換器數目: 1
功率耗散(最大): 1mW
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: 28-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 28-SSOP
包裝: 管件
輸入數目和類型: 16 個單端,單極;16 個單端,雙極;8 個差分,單極;8 個差分,雙極
產品目錄頁面: 1348 (CN2011-ZH PDF)
配用: DC571A-ND - BOARD DELTA SIGMA ADC LTC2418
LTC2414/LTC2418
41
241418fa
MULTIPLE CHANNEL USAGE
The LTC2414/LTC2418 have up to sixteen input channels
and this feature provides a very flexible and efficient
solution in applications where more than one variable
need to be measured.
Measurements of a Ladder of Sensors
In industrial process, it is likely that a large group of real
world phenomena need to be monitored where the speed
is not critical. One example is the cracking towers in
petroleum refineries where a group of temperature mea-
surements need to be taken and related. This is done by
passing an excitation current through a ladder of RTDs.
The configuration using a single LTC2418 to monitor up to
eight RTDs in differential mode is shown in Figure 48. A
high accuracy R1 is used to set the excitation current and
the reference voltage. A larger value of 25k is selected to
C1
0.1
F
15V
3
1
2
3
2
1
6
5
4
+
REF+
REF
CH0
CH1
GND
VCC
11
12
21
22
15
2410 F53
9
LTC2414/
LTC2418
LT1236-5
RN1
10k
22
10V
350
BRIDGE
TWO ELEMENTS
VARYING
RN1
10k
Q1
2N3904
1/2
LT1112
C2
0.1
F
15V
–5V
–15V
6
7
5
8
7
+
RN1
10k
RN1 IS CADDOCK T914 10K-010-02
Q2, Q3
2N3906
×2
1/2
LT1112
RN1
10k
33
×2
C3
47
F
C1
0.1
F
5V
8
4
20
20
+
Figure 47. Use Resistor Arrays to Provide Precise Matching in Excitation Amplifier
reduce the self-heating effects. R1 can also be broken into
two resistors, one 25k to set the excitation current and the
other a high accuracy 1k resistor to set the reference
voltage, assuming 100
platinum RTDs. This results in a
reduced reference voltage and a reduced common mode
difference between the reference and the input signal,
which improves the conversion linearity and reduces total
error.
Each input should be taken close to the related RTD to
minimize the error caused by parasitic wire resistance.
The interference on a signal transmission line from RTD to
the LTC2418 is rejected due to the excellent common
mode rejection and the digital LPF included in the LTC2418.
It should be noted that the input source resistance of CHO
can have a maximum value of 800
8 = 6.4k, so the
parasitic capacitance and resistance of the connection
wires need to be minimized in order not to degrade the
converter performance.
APPLICATIO S I FOR ATIO
WU
UU
相關PDF資料
PDF描述
VI-B1Y-IV-B1 CONVERTER MOD DC/DC 3.3V 99W
AD7490BRUZ IC ADC 12BIT 16CH 1MSPS 28TSSOP
VI-2VR-IX-B1 CONVERTER MOD DC/DC 7.5V 75W
LTC2410IGN#PBF IC ADC 24BIT DIFF INP/REF 16SSOP
AD7680BRMZ IC ADC 16BIT LP UNIPOLAR 8-MSOP
相關代理商/技術參數
參數描述
LTC2418IGN 功能描述:IC ADC 24BIT DIFF INPUT 28SSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 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) 輸入數目和類型:2 個單端,單極
LTC2418IGN#PBF 功能描述:IC ADC 24BIT DIFF INPUT 28SSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:microPOWER™ 位數:8 采樣率(每秒):1M 數據接口:串行,SPI? 轉換器數目:1 功率耗散(最大):- 電壓電源:模擬和數字 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® 輸入數目和類型:8 個單端,單極 產品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6
LTC2418IGN#TR 功能描述:IC ADC 24BIT DIFF INPUT 28SSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 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) 輸入數目和類型:2 個單端,單極
LTC2418IGN#TRPBF 功能描述:IC ADC 24BIT DIFF INPUT 28SSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 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) 輸入數目和類型:2 個單端,單極
LTC2420CS8 功能描述:IC ADC 20BIT MICRPWR W/OSC 8SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 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) 輸入數目和類型:2 個單端,單極