UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 539

• Manufacturer Part Number: UPD70F3738GF-GAS-AX
• Description: MCU 32BIT V850ES/JX3-L 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Lr

Specifications of UPD70F3738GF-GAS-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(13) A/D conversion result hysteresis characteristics
The successive comparison type A/D converter holds the analog input voltage in the internal sample & hold
capacitor and then performs A/D conversion. After A/D conversion has finished, the analog input voltage
remains in the internal sample & hold capacitor. As a result, the following phenomena may occur.
• When the same channel is used for A/D conversions, if the voltage is higher or lower than the previous A/D
• When switching the analog input channel, hysteresis characteristics may appear where the conversion
Therefore, to obtain a more accurate conversion result, perform A/D conversion twice successively for the
same channel, and discard the first conversion result.
conversion, then hysteresis characteristics may appear where the conversion result is affected by the
previous value. Thus, even if the conversion is performed at the same potential, the result may vary.
result is affected by the previous channel value. This is because one A/D converter is used for the A/D
conversions. Thus, even if the conversion is performed at the same potential, the result may vary.
CHAPTER 14 A/D CONVERTER
User’s Manual U18953EJ5V0UD
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