R4F24268NVFQV Renesas Electronics America, R4F24268NVFQV Datasheet - Page 1051

• Manufacturer Part Number: R4F24268NVFQV
• Description: MCU 256K FLASH 48K 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of R4F24268NVFQV

• Core Processor: H8S/2600
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SSU, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

H8S/2426, H8S/2426R, H8S/2424 Group
17.7.4
This LSI's analog input is designed so that the conversion accuracy is guaranteed for an input
signal for which the signal source impedance is 5 kΩ or less. This specification is provided to
enable the A/D converter's sample-and-hold circuit input capacitance to be charged within the
sampling time; if the sensor output impedance exceeds 5 kΩ, charging may be insufficient and it
may not be possible to guarantee the A/D conversion accuracy. However, if a large capacitance is
provided externally for conversion in single mode, the input load will essentially comprise only
the internal input resistance of 5 kΩ, and the signal source impedance is ignored. However, since a
low-pass filter effect is obtained in this case, it may not be possible to follow an analog signal with
a large differential coefficient (e.g., 5 mV/μs or greater) (see figure 17.11). When converting a
high-speed analog signal or conversion in scan mode, a low-impedance buffer should be inserted.
REJ09B0466-0350 Rev. 3.50
Jul 09, 2010
Sensor input
Permissible Signal Source Impedance
Sensor output
impedance
R to 5 kΩ
Low-pass
filter
C to 0.1 μF
Figure 17.11 Example of Analog Input Circuit
This LSI
Cin =
15 pF
Equivalent circuit of the A/D converter
10 kΩ
Section 17 A/D Converter
7 pF
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