CY8C32_12 CYPRESS [Cypress Semiconductor], CY8C32_12 Datasheet - Page 58

• Manufacturer Part Number: CY8C32_12
• Manufacturer: CYPRESS [Cypress Semiconductor]

8.7 DAC
The CY8C32 parts contain a Digital to Analog Converter (DAC).
The DAC is 8-bit and can be configured for either voltage or
current output. The DAC supports CapSense, power supply
regulation, and waveform generation. The DAC has the following
features:
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8.7.1 Current DAC
The current DAC (IDAC) can be configured for the ranges 0 to
31.875 µA, 0 to 255 µA, and 0 to 2.04 mA. The IDAC can be
configured to source or sink current.
Document Number: 001-56955 Rev. *N
Adjustable voltage or current output in 255 steps
Programmable step size (range selection)
Eight bits of calibration to correct ± 25 percent of gain error
Reference
Source
Scaler
Figure 8-8. DAC Block Diagram
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8.7.2 Voltage DAC
For the voltage DAC (VDAC), the current DAC output is routed
through resistors. The two ranges available for the VDAC are 0
to 1.02 V and 0 to 4.08 V. In voltage mode any load connected
to the output of a DAC should be purely capacitive (the output of
the VDAC is not buffered).
Source and sink option for current output
High and low speed / power modes
8 Msps conversion rate for current output
1 Msps conversion rate for voltage output
Monotonic in nature
Data and strobe inputs can be provided by the CPU or DMA,
or routed directly from the DSI
Dedicated low-resistance output pin for high-current mode
I
I
1x , 8x , 64x
1x , 8x , 64x
source
sink
Range
Range
3R
R
PSoC
Vout
®
Iout
3: CY8C32 Family
Data Sheet
Page 58 of 122