參數(shù)資料
型號: LTC2415-1IGN#TRPBF
廠商: Linear Technology
文件頁數(shù): 27/40頁
文件大?。?/td> 0K
描述: IC ADC 24BIT DIFFINPUT/REF16SSOP
標準包裝: 2,500
位數(shù): 24
采樣率(每秒): 13.75
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
轉換器數(shù)目: 2
功率耗散(最大): 1mW
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: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 16-SSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 1 個差分,雙極
LTC2415/LTC2415-1
33
sn2415 24151fs
APPLICATIO S I FOR ATIO
WU
U
Figure 36. Connecting the LTC2415/LTC2415-1 to a 68HC11 MCU Using the SPI Serial Interface
2415 F35
REF+
REF
IN+
IN
1, 7, 8, 9,
10, 15, 16
2
A0
A1
LTC2415/
LTC2415-1
VCC
GND
13
3
6
12
47
F
14
1
5
10
16
5V
15
11
2
TO OTHER
DEVICES
4
9
8
5V
+
74HC4052
3
4
5
6
Figure 35. Use a Differential Multiplexer to Expand Channel Capability
LTC2415/
LTC2415-1
SCK
SDO
CS
13
12
11
SCK (PD4)
MISO (PD2)
SS (PD5)
68HC11
2415 F36
Sample Driver for LTC2415/LTC2415-1 SPI Interface
Figure 35 shows the use of an LTC2415/LTC2415-1 with
a differential multiplexer. This is an inexpensive multi-
plexer that will contribute some error due to leakage if
used directly with the output from the bridge, or if
resistors are inserted as a protection mechanism from
overvoltage. Although the bridge output may be within the
input range of the A/D and multiplexer in normal opera-
tion, some thought should be given to fault conditions
that could result in full excitation voltage at the inputs to
the multiplexer or ADC. The use of amplification prior to
the multiplexer will largely eliminate errors associated
with channel leakage developing error voltages in the
source impedance.
The LTC2415/LTC2415-1 have a very simple serial inter-
face that makes interfacing to microprocessors and
microcontrollers very easy.
The listing in Figure 38 is a simple assembler routine for
the 68HC11 microcontroller. It uses PORT D, configuring
it for SPI data transfer between the controller and the
LTC2415/LTC2415-1. Figure 36 shows the simple 3-wire
SPI connection.
The code begins by declaring variables and allocating four
memory locations to store the 32-bit conversion result.
This is followed by initializing PORT D’s SPI configuration.
The program then enters the main sequence. It activates
the LTC2415/LTC2415-1 serial interface by setting the SS
output low, sending a logic low to CS. It next waits in a loop
for a logic low on the data line, signifying end-of-conver-
sion. After the loop is satisfied, four SPI transfers are
completed, retrieving the conversion. The main sequence
ends by setting SS high. This places the LTC2415/
LTC2415-1 serial interface in a high impedance state and
initiates another conversion.
The performance of the LTC2415/LTC2415-1 can be
verified using the demonstration board DC291A, see
Figure 40 for the schematic. This circuit uses the
computer’s serial port to generate power and the SPI
digital signals necessary for starting a conversion and
reading the result. It includes a Labview application
software program (see Figure 39) which graphically cap-
tures the conversion results. It can be used to determine
noise performance, stability and with an external source,
linearity. As exemplified in the schematic, the LTC2415/
LTC2415-1 are extremely easy to use. This demonstra-
tion board and associated software is available by con-
tacting Linear Technology.
相關PDF資料
PDF描述
LTC2436-1IGN#TRPBF IC CONV A/D 16B 2CH DIFF 16SSOP
LTC2439-1IGN#TRPBF IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2440IGN#TRPBF IC ADC DIFFER 24-BIT HS 16-SSOP
LTC2450IDC-1#TRPBF IC ADC 16BIT DELTA SIG 6-DFN
LTC2450IDC#TRPBF IC ADC 16BIT DELTA SIG 6-DFN
相關代理商/技術參數(shù)
參數(shù)描述
LTC2415CGN 功能描述:IC A/D CONV 24BIT MICRPWR 16SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 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
LTC2415CGN#PBF 功能描述:IC A/D CONV 24BIT MICRPWR 16SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 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 產品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6
LTC2415CGN#TR 功能描述:IC A/D CONV 24BIT MICRPWR 16SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 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
LTC2415CGN#TRPBF 功能描述:IC A/D CONV 24BIT MICRPWR 16SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 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
LTC2415IGN 功能描述:IC A/D CONV 24BIT MICRPWR 16SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 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