CY8C3446LTI-073 Cypress Semiconductor Corp, CY8C3446LTI-073 Datasheet - Page 57

• Manufacturer Part Number: CY8C3446LTI-073
• Description: IC MCU 8BIT 64KB FLASH 48QFN
• Manufacturer: Cypress Semiconductor Corp
• Series: PSOC™ 3 CY8C34xxr

Specifications of CY8C3446LTI-073

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.71 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 50MHz
• Number Of I /o: 25
• Eeprom Size: 2K x 8
• Core Processor: 8051
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Program Memory Size: 64KB (64K x 8)
• Data Converters: A/D 2x12b, D/A 2x8b
• Oscillator Type: Internal
• Peripherals: CapSense, DMA, POR, PWM, WDT
• Connectivity: EBI/EMI, I²C, LIN, SPI, UART/USART, USB
• Core Size: 8-Bit
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Technology: CMOS
• Processing Unit: Microcontroller
• Operating Supply Voltage (min): 1.8V
• Operating Supply Voltage (typ): 2.5/3.3/5V
• Operating Supply Voltage (max): 5.5V
• Package Type: QFN EP
• Screening Level: Industrial
• Pin Count: 48
• Mounting: Surface Mount
• Rad Hardened: No
• Processor Series: CY8C34
• Core: 8051
• Data Bus Width: 32 bit
• Data Ram Size: 8 KB
• Interface Type: I2C, SPI, UART, USB
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 28 to 72
• Number Of Timers: 4
• Operating Supply Voltage: 1.71 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Controller Family/series: (8051) PSOC 3
• No. Of I/o's: 25
• Eeprom Memory Size: 2KB
• Ram Memory Size: 8KB
• Cpu Speed: 50MHz
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

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
8.5.1 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.
8.5.2 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.
8.5.3 PGA
The PGA amplifies an external or internal signal. The PGA can
be configured to operate in inverting mode or noninverting mode.
The PGA function may be configured for both positive and
negative gains as high as 50 and 49 respectively. The gain is
adjusted by changing the values of R1 and R2 as illustrated in
Figure
and possible resistor settings for the PGA. The gain is switched
from inverting and non inverting by changing the shared select
value of the both the input muxes. The bandwidth for each gain
case is listed in
Table 8-3. Bandwidth
Document Number: 001-53304 Rev. *K
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
Gain
8-9. The schematic in
24
48
50
1
Table
8-3.
Bandwidth
6.0 MHz
340 kHz
220 kHz
215 kHz
Figure 8-9
REF
connection, and so on.
shows the configuration
Figure 8-9. PGA Resistor Settings
The PGA is used in applications where the input signal may not
be large enough to achieve the desired resolution in the ADC, or
dynamic range of another SC/CT block such as a mixer. The gain
is adjustable at runtime, including changing the gain of the PGA
prior to each ADC sample.
8.5.4 TIA
The Transimpedance Amplifier (TIA) converts an internal or
external current to an output voltage. The TIA uses an internal
feedback resistor in a continuous time configuration to convert
input current to output voltage. For an input current Iin, the output
voltage is Iin x Rfb +V
non inverting input. The feedback resistor Rfb is programmable
between 20 KΩ and 1 MΩ through a configuration register.
Table 8-4
configuration settings.
Table 8-4. Feedback Resistor Settings
Figure 8-10. Continuous Time TIA Schematic
V
V
V
V
S
V ref
in
ref
ref
in
Configuration Word
I in
0
1
0
1
shows the possible values of Rfb and associated
000b
001b
010b
011b
100b
101b
110b
111b
20 k or 40 k
R1
PSoC
REF
, where V
R fb
®
Nominal R
3: CY8C34 Family
REF
R2
is the value placed on the
1000
20 k to 980 k
120
250
500
20
30
40
60
fb
Data Sheet
(
KΩ
Page 57 of 126
)
V out
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