- 您現在的位置：買賣IC網 > PDF目錄377770 > LTC2480 (Linear Technology Corporation) 16-Bit ADC with Easy Drive PDF資料下載
參數資料
| 型號： | LTC2480 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 16-Bit ADC with Easy Drive |
| 中文描述： | 16位ADC的易道 |
| 文件頁數： | 38/40頁 |
| 文件大?。?/td> | 535K |
| 代理商： | LTC2480 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁當前第38頁第39頁第40頁
38
LTC2480
2480f
APPLICATIU
W
U
U
/*** read_LTC2480() ************************************************************
This is the function that actually does all the work of talking to the LTC2480.
The spi_read() function performs an 8 bit bidirectional transfer on the SPI bus.
Data changes state on falling clock edges and is valid on rising edges, as
determined by the setup_spi() line in the initialize() function.
A good starting point when porting to other processors is to write your own
spi_write function. Note that each processor has its own way of configuring
the SPI port, and different compilers may or may not have built-in functions
for the SPI port. Also, since the state of the LTC2480’s SDO line indicates
when a conversion is complete you need to be able to read the state of this line
through the processor’s serial data input. Most processors will let you read
this pin as if it were a general purpose I/O line, but there may be some that
don’t.
When in doubt, you can always write a “bit bang” function for troubleshooting
purposes.
The “fourbytes” structure allows byte access to the 32 bit return value:
struct fourbytes // Define structure of four consecutive bytes
{ // To allow byte access to a 32 bit int or float.
int8 te0; //
int8 te1; // The make32() function in this compiler will
int8 te2; // also work, but a union of 4 bytes and a 32 bit int
int8 te3; // is probably more portable.
};
Also note that the lower 4 bits are the configuration word from the previous
conversion. The 4 LSBs are cleared so that
they don’t affect any subsequent mathematical operations. While you can do a
right shift by 4, there is no point if you are going to convert to floating point
numbers - just adjust your scaling constants appropriately.
*******************************************************************************/
signed int32 read_LTC2480(char config)
{
union // adc_code.bits32 all 32 bits
{ // adc_code.by.te0 byte 0
signed int32 bits32; // adc_code.by.te1 byte 1
struct fourbytes by; // adc_code.by.te2 byte 2
} adc_code; // adc_code.by.te3 byte 3
output_low(CS); // Enable LTC2480 SPI interface
while(input(PIN_C4)) {} // Wait for end of conversion. The longest
// you will ever wait is one whole conversion period
// Now is the time to switch any multiplexers because the conversion is finished
// and you have the whole data output time for things to settle.
adc_code.by.te3 = 0; // Set upper byte to zero.
adc_code.by.te2 = spi_read(config); // Read first byte, send config byte
adc_code.by.te1 = spi_read(0); // Read 2nd byte, send speed bit
adc_code.by.te0 = spi_read(0); // Read 3rd byte. ‘0’ argument is necessary
// to act as SPI master!! (compiler
// and processor specific.)
output_high(CS); // Disable LTC2480 SPI interface
// Clear configuration bits and subtract offset. This results in
// a 2’s complement 32 bit integer with the LTC2480’s MSB in the 2^20 position
adc_code.by.te0 = adc_code.by.te0 & 0xF0;
adc_code.bits32 = adc_code.bits32 - 0x00200000;
return adc_code.bits32;
} // End of read_LTC2480()
相關PDF資料 |
PDF描述 |
|---|---|
| LTC2480IDD | 16-Bit ADC with Easy Drive |
| LTC2480CDD | 16-Bit ADC with Easy Drive |
| LTC2486 | 16-Bit 2-/4-Channel ツヒ ADC with PGA and Easy Drive Input Current Cancellation |
| LTC2486CDE | 16-Bit 2-/4-Channel ツヒ ADC with PGA and Easy Drive Input Current Cancellation |
| LTC2486IDE | 16-Bit 2-/4-Channel ツヒ ADC with PGA and Easy Drive Input Current Cancellation |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC2480CDD | 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 7.5sps 16-bit Serial 10-Pin DFN EP |
| LTC2480CDD#PBF | 功能描述:IC ADC 16BIT 10-DFN 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 |
| LTC2480CDD#TR | 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 7.5sps 16-bit Serial 10-Pin DFN EP T/R |
| LTC2480CDD#TRPBF | 功能描述:IC ADC 16BIT 10-DFN RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:2,500 系列:- 位數:16 采樣率（每秒）:15 數據接口:MICROWIRE?，串行，SPI? 轉換器數目: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 供應商設備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數目和類型:16 個單端，雙極；8 個差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC2480CDDPBF | 制造商:Linear Technology 功能描述:16-Bit ADC Easy Drive Current Canc.DFN10 |
發(fā)布緊急采購，3分鐘左右您將得到回復。