RA4L1 datasheet(92/125 Pages) RENESAS

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ADC12

Cin

MCU

Analog input

ANn

Note:

Terminal leakage current is not shown in this figure.

Figure 2.61

Equivalent circuit for analog input

Table 2.58

12-bit A/D converter channel classification

Classification

Channel

Conditions

Remarks

High-precision channel

AN000 to AN006

AVCC0 = 1.6 to 3.6 V

Pins AN000 to AN006 cannot

be used as general I/O, when

the A/D converter is in use.

Normal-precision channel

AN017 to AN025

Internal reference voltage input channel

Internal reference voltage

AVCC0 = 1.8 to 3.6 V

—

Temperature sensor input channel

Temperature sensor output

AVCC0 = 1.8 to 3.6 V

—

Input channel from CTSU

CTSU TSCAP voltage

AVCC0 = 1.6 to 3.6 V

—

Table 2.59

A/D internal reference voltage characteristics

Conditions: VCC = AVCC0 = VREFH0 = 1.8 to 3.6 V*1

Parameter

Min

Typ

Max

Unit

Test conditions

Internal reference voltage input channel*2

1.42

1.48

1.54

—

PCLKC (ADCLK) frequency*3

—

MHz

—

Sampling time*4

5.0

—

µs

—

Note 1. The internal reference voltage cannot be selected for input channels when AVCC0 < 1.8 V.

Note 2. The 12-bit A/D internal reference voltage indicates the voltage when the internal reference voltage is input to the 12-bit A/D

converter.

Note 3. When the internal reference voltage is selected as the high-potential reference voltage.

Note 4. When the internal reference voltage is converted.

RA4L1 Datasheet

2. Electrical Characteristics

R01DS0447EJ0131 Rev.1.31

May 26, 2026

Page 92 of 125

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