參數(shù)資料
型號(hào): DC951A
廠商: Linear Technology
文件頁(yè)數(shù): 31/40頁(yè)
文件大?。?/td> 0K
描述: BOARD DELTA SIGMA ADC LTC2481
軟件下載: QuikEval System
設(shè)計(jì)資源: DC951A Design File
DC951A Schematic
標(biāo)準(zhǔn)包裝: 1
系列: Easy Drive™, QuikEval™
ADC 的數(shù)量: 1
位數(shù): 16
采樣率(每秒): 7.5
數(shù)據(jù)接口: I²C,串行,SPI?
工作溫度: 0°C ~ 70°C
已用 IC / 零件: LTC2481
已供物品:
相關(guān)產(chǎn)品: LTC2481HDD#TRPBF-ND - IC ADC DELTA SIGMA 16BIT 10DFN
LTC2481HDD#PBF-ND - IC ADC 16BIT I2C 7.5SPS 10DFN
LTC2481CDD#TRPBF-ND - IC ADC 16BIT I2C 10-DFN
LTC2481IDD#TRPBF-ND - IC ADC 16BIT I2C 10-DFN
LTC2481IDD#PBF-ND - IC ADC 16BIT I2C 10-DFN
LTC2481CDD#PBF-ND - IC ADC 16BIT I2C 10-DFN
LTC2481
37
2481fc
APPLICATIONS INFORMATION
lcd_init();
// Initialize LCD
delay_ms(6);
printf(lcd_putc, “Hello!”);
// Obligatory hello message
delay_ms(500);
// for half a second
} // End of initialize()
*** main() ********************************************************************
Main program initializes microcontroller registers, then reads the LTC2481
repeatedly
*******************************************************************************/
void main()
{
signed int32 x;
// Integer result from LTC2481
oat voltage;
// Variable for oating point math
int16 timeout;
initialize();
// Hardware initialization
while(1)
{
delay_ms(1);
// Pace the main loop to something more than 1 ms
// This is a basic error detection scheme. The LTC248X will never take more than
// 163.5ms, 149.9ms, or 136.5ms to complete a conversion in the 50Hz, 55Hz, and 60Hz
// rejection modes, respectively.
// If read_LTC248X() does not return non-zero within this time period, something
// is wrong, such as an incorrect i2c address or bus conict.
if((x = read_LTC2481(LTC248XADDR, GAIN1 | VIN | R55)) != 0)
{
// No timeout, everything is okay
timeout = 0;
// reset timer
x &= 0xFFFFFFC0;
// clear cong bits so they don’t affect math
x ^= 0x80000000;
// Invert MSB, result is 2’s complement
voltage = (oat) x;
// convert to oat
voltage = voltage * 5.0 / 2147483648.0;// Multiply by Vref, divide by 2^31
lcd_putc(‘\f’);
// Clear screen
lcd_gotoxy(1,1);
// Goto home position
printf(lcd_putc, “V %01.4f”, voltage); // Display voltage
}
else
{
++timeout;
}
if(timeout > 200)
{
timeout = 200;
// Prevent rollover
lcd_gotoxy(1,1);
printf(lcd_putc, “ERROR - TIMEOUT”);
delay_ms(500);
}
} // End of main loop
} // End of main()
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