CY8CKIT-050 Cypress Semiconductor Corp, CY8CKIT-050 Datasheet - Page 51

• Manufacturer Part Number: CY8CKIT-050
• Description: DEV KIT PSOC 5 CY8C55
• Manufacturer: Cypress Semiconductor Corp
• Series: PSoC®5r
• Type: MCUr

Specifications of CY8CKIT-050

• Design Resources: PSoC 5 Dev Kit Schematic CY8CKIT-050 PCBA BOM CY8CKIT-50 Gerber File
• Contents: Board, Cable, CD, Display, Documentation
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: CY8C55
• Other names: 428-3110

8.5 Opamps
The CY8C55 family of devices contain four general purpose
opamps.
Figure 8-8. Opamp
The opamp is uncommitted and can be configured as a gain
stage or voltage follower on external or internal signals.
See
can all be connected to the internal global signals and monitored
with an ADC, or comparator. The configurations are
implemented with switches between the signals and GPIO pins.
Figure 8-9. Opamp Configurations
Document Number: 001-66235 Rev. *A
Internal Bus
To Internal Signals
Global Bus
Global Bus
Figure
Analog
Analog
Analog
VREF
GPIO
GPIO
Vin
Vp
8-9. In any configuration, the input and output signals
Vn
c) Internal Uncommitted
b) External Uncommitted
a) Voltage Follower
Opamp
Opamp
Opamp
Opamp
Opamp
Opamp
GPIO Pin
Vout to GPIO
Vp to GPIO
Vn to GPIO
Vout to Pin
Vout to Pin
=
Analog Switch
PRELIMINARY
GPIO
The opamp has three speed modes, slow, medium, and fast. The
slow mode consumes the least amount of quiescent power and
the fast mode consumes the most power. The inputs are able to
swing rail-to-rail. The output swing is capable of rail-to-rail
operation at low current output, within 50 mV of the rails. When
driving high current loads (about 25 mA) the output voltage may
only get within 500 mV of the rails.
8.6 Programmable SC/CT Blocks
The CY8C55 family of devices contains four switched
capacitor/continuous time (SC/CT) blocks. Each switched
capacitor/continuous time block is built around a single rail-to-rail
high bandwidth opamp.
Switched capacitor is a circuit design technique that uses
capacitors plus switches instead of resistors to create analog
functions. These circuits work by moving charge between
capacitors by opening and closing different switches.
Nonoverlapping in phase clock signals control the switches, so
that not all switches are ON simultaneously.
The PSoC Creator tool offers a user friendly interface, which
allows you to easily program the SC/CT blocks. Switch control
and clock phase control configuration is done by PSoC Creator
so users only need to determine the application use parameters
such as gain, amplifier polarity, V
The same opamps and block interfaces are also connectable to
an array of resistors which allows the construction of a variety of
continuous time functions.
The opamp and resistor array is programmable to perform
various analog functions including
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■
■
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8.6.1 Naked Opamp
The Naked Opamp presents both inputs and the output for
connection to internal or external signals. The opamp has a unity
gain bandwidth greater than 6.0 MHz and output drive current up
to 650 µA. This is sufficient for buffering internal signals (such as
DAC outputs) and driving external loads greater than 7.5 kohms.
8.6.2 Unity Gain
The Unity Gain buffer is a Naked Opamp with the output directly
connected to the inverting input for a gain of 1.00. It has a -3 dB
bandwidth greater than 6.0 MHz.
Naked Operational Amplifier - Continuous Mode
Unity-Gain Buffer - Continuous Mode
Programmable Gain Amplifier (PGA) - Continuous Mode
Transimpedance Amplifier (TIA) - Continuous Mode
Up/Down Mixer - Continuous Mode
Sample and Hold Mixer (NRZ S/H) - Switched Cap Mode
First Order Analog to Digital Modulator - Switched Cap Mode
PSoC
®
5: CY8C55 Family Datasheet
REF
connection, and so on.
Page 51 of 114
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