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LTC2485CDD датащи(PDF) 37 Page - Linear Technology

номер детали LTC2485CDD
подробное описание детали  24-Bit ?誇 ADC with Easy Drive Input Current Cancellation and I2C Interface
PDF  40 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC2485CDD датащи(HTML) 37 Page - Linear Technology

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LTC2485
2485fa
/*** main() ********************************************************************
Main program initializes microcontroller registers, then reads the LTC2481
repeatedly
*******************************************************************************/
void main()
{
signed int32 x, y;
// Integer result from LTC2481
float voltage;
// Variable for floating 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 LTC2485 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_LTC2485() does not return non-zero within this time period, something
// is wrong, such as an incorrect i2c address or bus conflict.
if((x = read_LTC2485(LTC248XADDR, VIN | R50 | SLOW)) != 0)
{
// No timeout, everything is okay
timeout = 0;
// reset timer
x ^= 0x80000000;
// Invert MSB, result is 2’s complement
voltage = (float) x;
// convert to float
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, “%01.6f”, 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()
APPLICATIO S I FOR ATIO



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