Component: DAC Dual (MCP49x2) (Analog Output): Difference between revisions
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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''ControlPins''' | ||
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| colspan="2" | Allows Shutdown (SHDN) and Latch (LDAC) pins to be controlled directly if enabled. | | colspan="2" | Allows Shutdown (SHDN) and Latch (LDAC) pins to be controlled directly if enabled. | ||
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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''Disable''' | ||
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| colspan="2" | Disables the DAC output. | | colspan="2" | Disables the DAC output. | ||
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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''Enable''' | ||
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| colspan="2" | Enables the DAC Output. | | colspan="2" | Enables the DAC Output. | ||
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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''Initialise''' | ||
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| colspan="2" | Configures the SPI peripheral ready for communications and initialises the internal variables. DAC needs to be enabled before any output voltage can be generated. | | colspan="2" | Configures the SPI peripheral ready for communications and initialises the internal variables. DAC needs to be enabled before any output voltage can be generated. | ||
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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''SetOutput''' | ||
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| colspan="2" | Sets the output voltage of the DAC 8-Bit: Range 0-255 10-Bit: Range 0-1023 12-Bit: Range 0-4095 | | colspan="2" | Sets the output voltage of the DAC 8-Bit: Range 0-255 10-Bit: Range 0-1023 12-Bit: Range 0-4095 | ||
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| width="90%" | | width="90%" class="mtx-class-macrohead" | '''Properties''' | ||
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| colspan="2" | Specifies the Resolution per digital bit in terms of Voltage. | | colspan="2" | Specifies the Resolution per digital bit in terms of Voltage. | ||
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| width="90%" | | width="90%" class="mtx-class-propfolder" | SPI Connections | ||
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| colspan="2" | Allows the LDAC pin to be driven from an output pin on the microcontroller. If not used then tie the LDAC pin to GND to allow the DAC to function. | | colspan="2" | Allows the LDAC pin to be driven from an output pin on the microcontroller. If not used then tie the LDAC pin to GND to allow the DAC to function. | ||
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| width="90%" | | width="90%" class="mtx-class-propfolder" | Simulation | ||
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Latest revision as of 14:37, 13 July 2026
| Author | Matrix TSL |
| Version | 1.0 |
| Category | Analog Output |
DAC Dual (MCP49x2) component
Component to drive a dual digital to analogue converter (DAC) IC from Microchip via an SPI interface. Compatible with MCP4902 (8-Bit), MCP4912 (10-Bit) and MCP4922 (12-Bit) devices.
Component Source Code
Please click here to download the component source project: FC_Comp_Source_DAC_MCP49x2.fcfx
Please click here to view the component source code (Beta): FC_Comp_Source_DAC_MCP49x2.fcfx
Detailed description
No detailed description exists yet for this component
Examples
No additional examples
Macro reference
ControlPins
|
ControlPins |
| Allows Shutdown (SHDN) and Latch (LDAC) pins to be controlled directly if enabled. | |
 - BOOL
|
Shutdown |
| 0 = Shutdown Device, 1 = Device Active | |
| - BOOL
|
Latch |
| 0 = Data output driven from DAC register, 1 = Data output locked | |
 - VOID
|
Return |
Disable
|
|
Disable |
| Disables the DAC output. | |
 - BYTE
|
Channel |
| 0=DAC Channel 0 , 1=DAC Channel 1 | |
| - VOID
|
Return |
Enable
|
|
Enable |
| Enables the DAC Output. | |
| - BYTE
|
Channel |
| 0=DAC Channel 0 , 1=DAC Channel 1 | |
| - VOID
|
Return |
Initialise
|
|
Initialise |
| Configures the SPI peripheral ready for communications and initialises the internal variables. DAC needs to be enabled before any output voltage can be generated. | |
| - VOID
|
Return |
SetOutput
|
|
SetOutput |
| Sets the output voltage of the DAC 8-Bit: Range 0-255 10-Bit: Range 0-1023 12-Bit: Range 0-4095 | |
| - BYTE
|
Channel |
| 0=DAC Channel 0 , 1=DAC Channel 1 | |
 - UINT
|
DAC_Value |
| The value to output to the DAC | |
| - VOID
|
Return |
Property reference
|
Properties |
|
DAC IC |
| Selects which DAC IC is connected and therefore the bit depth available. | |
|
|
Gain Option |
| Selects the maximum reference value for the DAC | |
|
Vref Pin Voltage |
| The reference voltage applied to the VREF pin. | |
|
|
Vref Voltage |
| Reference Voltage, Used to calculate the Voltage resolution. | |
|
Steps |
| Number of discrete output states available from the DAC. | |
|
Control Bits |
| Number of digital control bits | |
|
Resolution |
| Maximum output resolution based on number of control bits. | |
|
|
Voltage Resolution |
| Specifies the Resolution per digital bit in terms of Voltage. | |
|
SPI Connections |
|
|
Channel |
| SPI Channel selector | |
|
|
Prescale |
| Prescale option selector | |
|
MOSI |
| SPI Data Out Pin SDO - Also Known as Master Out Slave In (MOSI) when used in Master mode. | |
|
|
MOSI Remap Pin |
| Select which the target pin to assign the MOSI hardware pin functionality. | |
|
|
MISO |
| SPI Data In Pin SDI - Also Known as Master In Slave Out (MISO) when used in Master mode. | |
|
|
MISO Remap Pin |
| Select which the target pin to assign the MISO hardware pin functionality. | |
|
|
CLK |
| SPI Clock Pin CLK - The Clock signal is driven by the SPI master. | |
|
|
CLK Remap Pin |
| Select which the target pin to assign the CLK hardware pin functionality. | |
|
|
CS / SS |
| Chip Select / Slave Select Pin Master Mode: General purpose output pin used to select the remote SPI device. Slave Mode: Hardware chip select pin input used to select the SPI device. | |
|
Use SHDN Pin |
| Allows the SHDN pin to be driven from an output pin on the microcontroller. If not used then tie the SHDN pin to VCC to allow the DAC to function. | |
|
|
Use LDAC Pin |
| Allows the LDAC pin to be driven from an output pin on the microcontroller. If not used then tie the LDAC pin to GND to allow the DAC to function. | |
|
|
Simulation |
|
|
Simulate Comms |