使用较小的DAC的布置将大数字输入转换为模拟信号- Simulink - MathWorks 日本

Library:
Mixed-Signal Blockset / DAC / Architectures

Ports

输入

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`digital`— Digital input signal
整数

Digital input signal to DAC, specified as an integer.

If the输入polarity参数设置为双极, the allowed range of the signal is [−2^NBits-1, 2^NBits1]。

If the输入polarity参数设置为Unipolar, the allowed range of the signal is [0, 2^NBits-1].

Data Types:single|double|int8|INT16|INT32.|uint8|uint16|uint32|固定点

`start`— External clock to start conversion
scalar

External clock to start conversion, specified as a scalar. The digital to-analog conversion process starts at the rising edge of the signal at thestart港口。

Dependencies

要启用此端口，请选择开始使用外部时钟.

Data Types:double

Output

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`analog`- 转换模拟输出信号
scalar

Converted analog output signal, returned as a scalar.

Data Types:double

Parameters

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`输入polarity`— Define DAC input data polarity
`Unipolar`（默认）|`双极`

Define the polarity of the DAC input data. Set输入polarityto:

Unipolar当数字输入只能是正的时。
双极when the digital input can be both positive and negative.

Programmatic Use

Block parameter:Polarity

Type:character vector

Values:Unipolar|双极

Default:Unipolar

`开始使用外部时钟`— Connect to external start conversion clock
on (default) | off

Select to connect to an external start conversion clock. This option is selected by default. If you deselect this option, aSampling Clock Source块内部分段DAC.block is used to generate the start conversion clock.

`转换开始频率(Hz)`— Frequency of internal start conversion clock
`1e6`（默认）|真正的标量

Frequency of the internal start conversion clock, specified as a real scalar in Hz. The转换开始频率parameter determines the conversion rate at the start of conversion.

Dependencies

To enable this parameter, deselect开始使用外部时钟.

Programmatic Use

Block parameter:StartFreq

Type:character vector

Values:真正的标量

Default:1e6

`Reference (V)`— DAC output reference magnitude
`0.5`（默认）|真正的标量

The reference magnitude of the DAC output, specified as a real scalar in volts.Reference (V)is one least significant bit (LSB) greater than the maximum achievable output.

Programmatic Use

Block parameter:Ref

Type:character vector

Values:真正的标量

Default:0.5

`Bias (V)`— Difference between analog output for code zero and analog zero
`0`（默认）|真正的标量

The difference between the analog output for code zero and analog zero in an unimpaired DAC, specified as a real scalar in volts.

Programmatic Use

Block parameter:Bias

Type:character vector

Values:真正的标量

Default:0

`Settling time (s)`- 输出解决所需的时间
`2e-7`（默认）|nonnegative real scalar

DAC输出所需的时间在其最终值的一小部分内定居，以秒为单位指定为非负实际标量。

Programmatic Use

Block parameter:SettlingTime

Type:character vector

Values:真正的标量

Default:2e-7

`建立时间容忍（LSB）`— Tolerance for calculating settling time
`0.5`（默认）|积极的标量

The tolerance allowed for calculating settling time, specified as a positive real scalar in LSB. The output of the DAC must settle within the建立时间容忍（LSB）bySettling time (s).

Programmatic Use

Block parameter:SettlingTimetolerance.

Type:character vector

Values:积极的标量

Default:0.5

段设置

`拓扑`— Topology of base DAC segment
`二进制加权`(default)

The topology of the base DAC for the segment. You can only use a二进制加权DAC。

`Bits`- DAC段的物理输入位数
真正的标量大于2

Number of physical input bits for the DAC segment, specified as a real scalar greater than 2. For the first two DAC segments, the default value ofBitsis4. For subsequent segments, the default value is2.

`Offset error`- 换档量化步骤
`0`（默认）|真正的标量

Shift quantization steps by the value you provide inOffset errorparameter, specified as a real scalar.

`Offset error unit`- 偏移错误的单位
`LSB.`（默认）|`FS`|`％FS.`

Unit of offset error, specified asLSB., full scale (FS）或满量程百分比（％FS.).

`Gain error`— Error in slope of DAC transfer curve
`0`（默认）|真正的标量

DAC传输曲线斜率中的错误，指定为真正的标量。

`Gain error unit`— Unit of gain error
`LSB.`（默认）|`FS`|`％FS.`

Unit of gain error, specified asLSB., full scale (FS）或满量程百分比（％FS.).

`New segment`- 添加新的DAC段
button

Click to add a new DAC segment with default values. Currently you can add up to five DAC segments to the分段DAC.block.

`选择重复`- 重复选定的段
button

Click to add a new DAC segment by duplicating a selected segment. Currently you can add up to five segments to the分段DAC.block.

`▽ete selected`— Delete selected segment
button

单击以从中删除所选的DAC段分段DAC.block.

分段DAC.

Description

Ports

输入

`digital`— Digital input signal
整数

`start`— External clock to start conversion
scalar

Dependencies

Output

`analog`- 转换模拟输出信号
scalar

Parameters

`输入polarity`— Define DAC input data polarity
`Unipolar`（默认）|`双极`

Programmatic Use

`开始使用外部时钟`— Connect to external start conversion clock
on (default) | off

`转换开始频率(Hz)`— Frequency of internal start conversion clock
`1e6`（默认）|真正的标量

Dependencies

Programmatic Use

`Reference (V)`— DAC output reference magnitude
`0.5`（默认）|真正的标量

Programmatic Use

`Bias (V)`— Difference between analog output for code zero and analog zero
`0`（默认）|真正的标量

Programmatic Use

`Settling time (s)`- 输出解决所需的时间
`2e-7`（默认）|nonnegative real scalar

Programmatic Use

`建立时间容忍（LSB）`— Tolerance for calculating settling time
`0.5`（默认）|积极的标量

Programmatic Use

`拓扑`— Topology of base DAC segment
`二进制加权`(default)

`Bits`- DAC段的物理输入位数
真正的标量大于2

`Offset error`- 换档量化步骤
`0`（默认）|真正的标量

`Offset error unit`- 偏移错误的单位
`LSB.`（默认）|`FS`|`％FS.`

`Gain error`— Error in slope of DAC transfer curve
`0`（默认）|真正的标量

`Gain error unit`— Unit of gain error
`LSB.`（默认）|`FS`|`％FS.`

`New segment`- 添加新的DAC段
button

`选择重复`- 重复选定的段
button

`▽ete selected`— Delete selected segment
button

Version History

See Also

分段DAC.

Description

Ports

输入

digital— Digital input signal整数

start— External clock to start conversionscalar

Dependencies

Output

analog- 转换模拟输出信号scalar

Parameters

输入polarity— Define DAC input data polarityUnipolar（默认）|双极

Programmatic Use

开始使用外部时钟— Connect to external start conversion clockon (default) | off

转换开始频率(Hz)— Frequency of internal start conversion clock1e6（默认）|真正的标量

Dependencies

Programmatic Use

Reference (V)— DAC output reference magnitude0.5（默认）|真正的标量

Programmatic Use

Bias (V)— Difference between analog output for code zero and analog zero0（默认）|真正的标量

Programmatic Use

Settling time (s)- 输出解决所需的时间2e-7（默认）|nonnegative real scalar

Programmatic Use

建立时间容忍（LSB）— Tolerance for calculating settling time0.5（默认）|积极的标量

Programmatic Use

拓扑— Topology of base DAC segment二进制加权(default)

Bits- DAC段的物理输入位数真正的标量大于2

Offset error- 换档量化步骤0（默认）|真正的标量

Offset error unit- 偏移错误的单位LSB.（默认）|FS|％FS.

Gain error— Error in slope of DAC transfer curve0（默认）|真正的标量

Gain error unit— Unit of gain errorLSB.（默认）|FS|％FS.

New segment- 添加新的DAC段button

选择重复- 重复选定的段button

▽ete selected— Delete selected segmentbutton

Version History

See Also

`digital`— Digital input signal
整数

`start`— External clock to start conversion
scalar

`analog`- 转换模拟输出信号
scalar

`输入polarity`— Define DAC input data polarity
`Unipolar`（默认）|`双极`

`开始使用外部时钟`— Connect to external start conversion clock
on (default) | off

`转换开始频率(Hz)`— Frequency of internal start conversion clock
`1e6`（默认）|真正的标量

`Reference (V)`— DAC output reference magnitude
`0.5`（默认）|真正的标量

`Bias (V)`— Difference between analog output for code zero and analog zero
`0`（默认）|真正的标量

`Settling time (s)`- 输出解决所需的时间
`2e-7`（默认）|nonnegative real scalar

`建立时间容忍（LSB）`— Tolerance for calculating settling time
`0.5`（默认）|积极的标量

`拓扑`— Topology of base DAC segment
`二进制加权`(default)

`Bits`- DAC段的物理输入位数
真正的标量大于2

`Offset error`- 换档量化步骤
`0`（默认）|真正的标量

`Offset error unit`- 偏移错误的单位
`LSB.`（默认）|`FS`|`％FS.`

`Gain error`— Error in slope of DAC transfer curve
`0`（默认）|真正的标量

`Gain error unit`— Unit of gain error
`LSB.`（默认）|`FS`|`％FS.`

`New segment`- 添加新的DAC段
button

`选择重复`- 重复选定的段
button

`▽ete selected`— Delete selected segment
button