HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 753

• Manufacturer Part Number: HD64F2638F20J
• Description: IC H8S MCU FLASH 256K 128-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2638F20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Permissible Signal Source Impedance: The chip's analog input is designed so that conversion
precision is guaranteed for an input signal for which the signal source impedance is 10 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 10
kΩ, charging may be insufficient and it may not be possible to guarantee the A/D conversion
precision.
However, if a large capacitance is provided externally, the input load will essentially comprise
only the internal input resistance of 10 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).
When converting a high-speed analog signal, a low-impedance buffer should be inserted.
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Figure 17-10 A/D Conversion Precision Definitions (2)
Digital output
Ideal A/D conversion
characteristic
Offset error
Actual A/D conversion
characteristic
Nonlinearity
error
Full-scale error
Analog
input voltage
FS
Section 17 A/D Converter
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