CY8C5246AXI-054 Cypress Semiconductor Corp, CY8C5246AXI-054 Datasheet - Page 51

• Manufacturer Part Number: CY8C5246AXI-054
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY8C5246AXI-054

• Lead Free Status / Rohs Status: Compliant

8.5 CapSense
The CapSense system provides a versatile and efficient means
for measuring capacitance in applications such as touch sense
buttons, sliders, proximity detection, etc. The CapSense system
uses a configuration of system resources, including a few
hardware functions primarily targeted for CapSense. Specific
resource usage is detailed in the CapSense component in PSoC
Creator.
A capacitive sensing method using a Delta-Sigma Modulator
(CSD) is used. It provides capacitance sensing using a switched
capacitor technique with a delta-sigma modulator to convert the
sensing current to a digital code.
8.6 Temp Sensor
Die temperature is used to establish programming parameters
for writing flash. Die temperature is measured using a dedicated
sensor based on a forward biased transistor. The temperature
sensor has its own auxiliary ADC.
8.7.1 Current DAC
The current DAC (IDAC) can be configured for the ranges 0 to
32 µA, 0 to 256 µA, and 0 to 2.048 mA. The IDAC can be
configured to source or sink current.
Document Number: 001-55034 Rev. *F
Reference
Source
PRELIMINARY
Figure 8-6. DAC Block Diagram
Scaler
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:
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 1.024 V and 0 to 4.096 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).
Adjustable voltage or current output in 255 steps
Programmable step size (range selection)
Eight bits of calibration to correct ± 25% of gain error
Source and sink option for current output
8 Msps conversion rate for current output
1 Msps conversion rate for voltage output
Monotonic in nature
PSoC
I
I
1x , 8x , 64x
1x , 8x , 64x
source
sink
Range
Range
®
5: CY8C52 Family Data Sheet
3R
R
Vout
Iout
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