参数资料
型号: AD7879-1WARUZ-RL7
厂商: Analog Devices Inc
文件页数: 9/41页
文件大小: 0K
描述: IC ADC 12BIT CTRLR TOUCH 16TSSOP
标准包装: 1,000
类型: 电阻
触摸面板接口: 4 线
输入数/键: 1 TSC
分辨率(位): 12 b
评估套件: *
数据接口: I²C,串行
数据速率/采样率 (SPS,BPS): 105k
电压基准: 内部
电源电压: 1.6 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 带卷 (TR)
AD7879/AD7889
Rev. C | Page 16 of 40
Temperature Calculations
If an explicit temperature reading in degrees Celsius is required,
calculate for the single-measurement method as follows:
1. Calculate the scale factor of the ADC in degrees per LSB.
Degrees per LSB = ADC LSB size/2.1 mV =
(VCC/4096)/2.1 mV
2. Save the ADC output, DCAL, at the calibration temperature,
TCAL.
3. Take the ADC reading, DAMB, at the temperature to be
measured, TAMB.
4. Calculate the difference in degrees between TCAL and TAMB by
T = (DAMB DCAL) × degrees per LSB
5. Add T to TCAL.
Example
Using VCC = 2.5 V as reference,
Degrees per LSB = (2.5/4096)/2.1 × 103 = 0.291
The ADC output is 983 decimal at 25°C, equivalent to a diode
forward voltage of 0.6 V.
The ADC output at TAMB is 880.
T = (880 983) × 0.291 = 30°C
TAMB = 25 + 30 = 55°C
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