Component: DAC (MCP47x6) (MCP47x6) (Analog Output): Difference between revisions

Latest revision as of 14:36, 13 July 2026

Author	Matrix TSL
Version	1.0
Category	Analog Output

DAC (MCP47x6) component

Component to drive a digital to analogue converter (DAC) IC from Microchip via an I2C interface. Compatible with MCP4706 (8-Bit), MCP4716 (10-Bit) and MCP4726 (12-Bit) devices.

Detailed description

No detailed description exists yet for this component

Examples

No additional examples

Macro reference

Disable

	Disable
Disables the DAC output.
- VOID	Return

Enable

	Enable
Enables the DAC Output.
- VOID	Return

Initialise

	Initialise
Configures the I2C 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
- 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.
	Disabled Pull Down
Sets the pull down resistance when the IC's DAC output is disabled.
	Voltage Reference
Sets the Voltage reference option
	Gain Option
Provides a 1x or 2x gain on the output. For 2x gain the vref must be max 1/2 VCC.
	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.
	I2C Connections
	User Address Bits
Specifies the bottom three "user" bits of the I2C 7-bit address
	Channel
Channel selection
	SDA
Pin used for SDA (data signal)
	SCL
Pin used for SCL (clock signal)
	Stop Delay
On older microcontroller devices there is a potential for the I2C hardware channel to lock up if there is not a 10ms delay between an I2C stop event and the next I2C start event. Most modern microcontrollers will not have a problem so this property can be disabled to speed up the I2C communications.
	Baud Select
Baud rate option selector
	Baud Rate
Baud rate to be used
	Simulation
	Simulate Comms

Component Source Code

Please click here to download the component source project: FC_Comp_Source_DAC_MCP47x6.fcfx

Please click here to view the component source code (Beta): FC_Comp_Source_DAC_MCP47x6.fcfx

@@ Line 195: / Line 195: @@
 | colspan="2" | Specifies the Resolution per digital bit in terms of Voltage.&nbsp;
 |-
-| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
+| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
 | width="90%" class="mtx-class-propfolder" | I2C Connections
 |-
@@ Line 234: / Line 234: @@
 | colspan="2" | Baud rate to be used&nbsp;
 |-
-| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
+| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
 | width="90%" class="mtx-class-propfolder" | Simulation
 |-

SteveT (talk | contribs)