Component: DAC Quad (MCP4728) (MCP4728) (Analog Output)
| Author | Matrix TSL |
| Version | 1.0 (Release) |
| Category | Analog Output |
Contents
DAC Quad (MCP4728) (MCP4728) component
Component to drive a quad digital to analogue converter (DAC) IC from Microchip via an I2C interface. Compatible with MCP4728 (12-Bit) devices.
Examples
No additional examples
Downloadable macro reference
SetOutput
Sets the output voltage of the DAC
12-Bit: Range 0-4095
Parameters
- BYTE Channel
- Range: 0-3 / 0=DAC Channel 0 / 1=DAC Channel 1 ...
- UINT DAC_Value
- The value to output to the DAC
Return value
- This call does not return a value
ControlPins
Allows Shutdown (SHDN) and Latch (LDAC) pins to be controlled directly if enabled.
Parameters
- BOOL Latch
- 0 = Data output driven from DAC register, 1 = Data output locked
Return value
- This call does not return a value
SetInitialEEOutput
Stores a DAC value into EE memory to be used on power up.
Parameters
- BYTE Channel
- Range: 0-3 / 0=DAC Channel 0 / 1=DAC Channel 1 ...
- UINT DAC_Value
- The value to output to the DAC
Return value
- This call does not return a value
Disable
Disables the DAC output.
Parameters
- BYTE Channel
- Range: 0-3 / 0=DAC Channel 0 / 1=DAC Channel 1 ...
Return value
- This call does not return a value
Enable
Enables the DAC Output.
Parameters
- BYTE Channel
- Range: 0-3 / 0=DAC Channel 0 / 1=DAC Channel 1 ...
Return value
- This call does not return a value
SetDeviceAddress
Writes a new device address into EE memory.
The use LDAC pin component property must be set to true and the LDAC pin should be unique for every MCP4728 device connected to the I2C bus.
Parameters
- BYTE OldAddress
- Range: 0-7
- BYTE NewAddress
- Range: 0-7
Return value
- This call does not return a value
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.
Parameters
- This macro has no parameters
Return value
- This call does not return a value
Simulation macro reference
This component does not contain any simulation macros
Property reference
Pull Down Option
This property is of type Fixed list of ints and can be referenced with the variable name PDOption.
No additional information
VREF Option
This property is of type Fixed list of ints and can be referenced with the variable name VREFOPtion.
No additional information
Gain Option
This property is of type Fixed list of ints and can be referenced with the variable name GainOP.
Selects the maximum reference value for the DAC
Vref Voltage
This property is of type Floating point and can be referenced with the variable name VrefVol.
Reference Voltage, Used to calculate the Voltage resolution.
Steps
This property is of type Unsigned integer and can be referenced with the variable name Steps.
Number of discrete output states available from the DAC.
Control Bits
This property is of type Signed integer and can be referenced with the variable name BITS.
Number of digital control bits
Resolution
This property is of type Line of text and can be referenced with the variable name Res.
Maximum output resolution based on number of control bits.
Voltage Resolution
This property is of type Floating point and can be referenced with the variable name VoltRes.
Specifies the Resolution per digital bit in terms of Voltage.
Device Address
This property is of type Fixed list of ints and can be referenced with the variable name DeviceAddress.
No additional information
Channel
This property is of type Fixed list of ints and can be referenced with the variable name cal_i2c1::CHANNEL.
Channel selection
SDA
This property is of type Single digital pin and can be referenced with the variable name cal_i2c1::SDA.
Pin used for SDA (data signal)
SCL
This property is of type Single digital pin and can be referenced with the variable name cal_i2c1::SCL.
Pin used for SCL (clock signal)
Baud Select
This property is of type Fixed list of ints and can be referenced with the variable name cal_i2c1::BAUD_LIST.
Baud rate option selector
Baud Rate
This property is of type Signed integer and can be referenced with the variable name cal_i2c1::BAUD.
Baud rate to be used
Stop Delay
This property is of type True or false and can be referenced with the variable name cal_i2c1::StopDel.
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.
Use LDAC Pin
This property is of type True or false and can be referenced with the variable name UseLDAC.
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.
DAC Output Scope Traces
This property is of type True or false and can be referenced with the variable name ScopeTraces.
Selects if the scope traces are automatically generated or not
Scope Traces
This property is of type True or false and can be referenced with the variable name cal_i2c1::ScopeTraces.
Selects if the component pin connections are automatically generated on the data recorder window or not.
Yes: Automatically add the component pins to a group on the data recorder which will reflect the sim data during simultion.
No: Do not show the pin signals on the data recorder window.
Console Data
This property is of type True or false and can be referenced with the variable name cal_i2c1::ConsoleData.
Selects if the console data is automatically generated or not
Injector
This property is of type Fixed list of ints and can be referenced with the variable name cal_i2c1::Injector.
Specifies the injector component on the panel to interact with to provide comms simulation.
