DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 584

• Manufacturer Part Number: DF2398TE20
• Description: IC H8S MCU FLASH 256K 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 120-TQFP, 120-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2398TE20; HD64F2398TE20

However, if a large capacitance is provided externally, the input load will essentially comprise only the internal input
resistance of 10 kohm, 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/ s or greater).
When converting a high-speed analog signal, a low-impedance buffer should be inserted.
Influences on Absolute Precision: Adding capacitance results in coupling with GND, and therefore noise in GND may
adversely affect absolute precision. Be sure to make the connection to an electrically stable GND such as AV
Care is also required to insure that filter circuits do not communicate with digital signals on the mounting board, so acting
as antennas.
Rev.6.00 Oct.28.2004 page 554 of 1016
REJ09B0138-0600H
Sensor input
Note: Values are reference values.
Sensor output
impedance
to 10 k
Low-pass
filter C
to 0.1 F
Figure 16-10 Example of Analog Input Circuit
C
15 pF
H8/2357
Group
in
=
A/D converter
equivalent circuit
10 k
20 pF
SS
.