MC56F8345VFGE Freescale Semiconductor, MC56F8345VFGE Datasheet - Page 155

• Manufacturer Part Number: MC56F8345VFGE
• Description: IC DSP 16BIT 60MHZ 128-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8345VFGE

• Core Processor: 56800
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 49
• Program Memory Size: 136KB (68K x 16)
• Program Memory Type: FLASH
• Ram Size: 6K x 16
• Voltage - Supply (vcc/vdd): 2.25 V ~ 3.6 V
• Data Converters: A/D 16x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 128-LQFP
• Data Bus Width: 16 bit
• Processor Series: MC56F83xx
• Core: 56800E
• Numeric And Arithmetic Format: Fixed-Point
• Device Million Instructions Per Second: 60 MIPs
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 49
• Data Ram Size: 8 KB
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Interface Type: SCI, SPI, CAN
• Minimum Operating Temperature: - 40 C
• For Use With: MC56F8367EVME - EVAL BOARD FOR MC56F83X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Equivalent Circuit for ADC Inputs
10.16 Equivalent Circuit for ADC Inputs
Figure 10-22
illustrates the ADC input circuit during sample and hold. S1 and S2 are always open/closed
at the same time that S3 is closed/open. When S1/S2 are closed & S3 is open, one input of the sample and
hold circuit moves to V
- V
/ 2, while the other charges to the analog input voltage. When the
REFH
REFH
switches are flipped, the charge on C1 and C2 are averaged via S3, with the result that a single-ended
analog input is switched to a differential voltage centered about V
- V
/ 2. The switches switch
REFH
REFH
on every cycle of the ADC clock (open one-half ADC clock, closed one-half ADC clock). Note that there
are additional capacitances associated with the analog input pad, routing, etc., but these do not filter into
the S/H output voltage, as S1 provides isolation during the charge-sharing phase.
One aspect of this circuit is that there is an on-going input current, which is a function of the analog input
voltage, V
and the ADC clock frequency.
REF
56F8345 Technical Data, Rev. 17
Freescale Semiconductor
155
Preliminary