参数资料
型号: LTC2481IDD#TRPBF
厂商: Linear Technology
文件页数: 31/40页
文件大小: 0K
描述: IC ADC 16BIT I2C 10-DFN
标准包装: 2,500
位数: 16
采样率(每秒): 7.5
数据接口: I²C,串行,SPI?
转换器数目: 1
功率耗散(最大): 480µW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘
供应商设备封装: 10-DFN(3x3)
包装: 带卷 (TR)
输入数目和类型: 2 个单端,双极;1 个差分,双极
配用: DC951A-ND - BOARD DELTA SIGMA ADC LTC2481
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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