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Table 2.51

A/D conversion characteristics (6) in low-power A/D conversion mode (2 of 2)

Conditions: VCC = AVCC0 = VREFH0 = 1.6 to 3.6 V*5 (AVCC0 = VCC when VCC < 2.0 V), VSS = AVSS0 = VREFL0 = 0 V

Reference voltage range applied to the VREFH0 and VREFL0.

Parameter

Min

Typ

Max

Unit

Test conditions

Absolute accuracy

—

±3.75

±9.5

LSB

High-precision channel

±13.5

LSB

Other than specified

DNL differential nonlinearity error

—

±2.0

—

LSB

—

INL integral nonlinearity error

—

±2.25

±4.5

LSB

—

Note:

The characteristics apply when no pin functions other than 12-bit A/D converter input are used. Absolute accuracy does not include

quantization errors. Offset error, full-scale error, DNL differential nonlinearity error, and INL integral nonlinearity error do not include

quantization errors.

Note 1. The conversion time is the sum of the sampling time and the comparison time. The number of sampling states is indicated for the

test conditions.

Note 2. Except for I/O input capacitance (Cin), see section 2.2.4. I/O VOH, VOL, and Other Characteristics.

Note 3. Reference data.

Note 4. ( ) lists sampling time.

Note 5. When VREFH0 < AVCC0, the MAX. values are as follows.

Absolute accuracy/Offset error/Full-scale error:

For voltage difference between AVCC0 and VREFH0, it should be added ±0.75 LSB/V to the Max spec.

INL integral non-linearity error:

For voltage difference between AVCC0 and VREFH0, it should be added ±0.2 LSB/V to the Max spec.

Figure 2.44 shows the equivalent circuit for analog input.

ADC12

Cin

MCU

Analog input

ANn

Note:

Terminal leakage current is not shown in this figure.

Figure 2.44

Equivalent circuit for analog input

Table 2.52

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

—

Table 2.53

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.

RA4C1 Datasheet

2. Electrical Characteristics

R01DS0457EJ0110 Rev.1.10

Jul 4, 2025

Page 67 of 97

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