参数资料
型号: MCP4716A1T-E/MAY
厂商: Microchip Technology
文件页数: 57/86页
文件大小: 0K
描述: IC DAC 10BIT NV EEP I2C 6DFN
标准包装: 3,000
设置时间: 6µs
位数: 10
数据接口: EEPROM,I²C,串行
转换器数目: 1
电压电源: 单电源
功率耗散(最大): 1.10W
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 6-VDFN 裸露焊盘
供应商设备封装: 6-DFN(2x2)
包装: 带卷 (TR)
输出数目和类型: 1 电压,单极
采样率(每秒): *
MCP4706/4716/4726
DS22272C-page 60
2011-2012 Microchip Technology Inc.
7.7
Integral Nonlinearity (INL)
The Integral Nonlinearity (INL) error is the maximum
deviation of an actual transfer function from an ideal
transfer function (straight line).
In the MCP47X6, INL is calculated using two end points
(zero and full scale). INL can be expressed as a per-
centage of full scale range (FSR) or in a fraction of an
LSb. INL is also called relative accuracy. Equation 7-4
shows how to calculate the INL error in LSb and
Figure 7-2 shows an example of INL accuracy.
EQUATION 7-4:
INL ERROR
FIGURE 7-2:
INL Accuracy Example.
7.8
Differential Nonlinearity (DNL)
The Differential Nonlinearity (DNL) error (see Figure 7-3)
is the measure of step size between codes in actual
transfer function. The ideal step size between codes is
1 LSb. A DNL error of zero would imply that every code
is exactly 1 LSb wide. If the DNL error is less than 1 LSb,
the DAC ensures monotonic output and no missing
codes. The DNL error between any two adjacent codes
is calculated as follows:
EQUATION 7-5:
DNL ERROR
FIGURE 7-3:
DNL Accuracy Example.
INL
V
OUT
V
Ide al
()
LSb
---------------------------------------
=
Where:
INL is expressed in LSb.
VIdeal
=
Code*LSb
VOUT
=
The output voltage measured with
a given DAC input code
010
001
000
Analog
Output
(LSb)
DAC Input Code
011
111
100
101
1
2
3
4
5
6
0
7
110
Ideal Transfer Function
Actual Transfer Function
INL = < -1 LSb
INL = 0.5 LSb
INL = - 1 LSb
DNL
ΔV
OUT
LSb
LSb
----------------------------------
=
Where:
DNL is expressed in LSb.
ΔV
OUT
=
The measured DAC output
voltage difference between two
adjacent input codes
010
001
000
Analog
Output
(LSb)
DAC Input Code
011
111
100
101
1
2
3
4
5
6
0
7
DNL = 2 LSb
DNL = 0.5 LSb
110
Ideal Transfer Function
Actual Transfer Function
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