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Table 2.41

A/D conversion characteristics (7) in low-power A/D conversion mode (2 of 2)

Conditions: VCC = AVCC0 = VREFH0 = 1.6 to 5.5 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

Offset error

—

±1.25

±7.5

LSB

High-precision channel

±10.0

LSB

Other than specified

Full-scale error

—

±1.5

±7.5

LSB

High-precision channel

±10.0

LSB

Other than specified

Quantization error

—

±0.5

—

LSB

—

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 2.38 shows the equivalent circuit for analog input.

ADC12

Cin

MCU

Analog input

ANn

Note:

Terminal leakage current is not shown in this figure.

Figure 2.38

Equivalent circuit for analog input

Table 2.42

12-bit A/D converter channel classification

Classification

Channel

Conditions

Remarks

High-precision channel

AN000 to AN014

AVCC0 = 1.6 to 5.5 V

Pins AN000 to AN014 cannot

be used as general I/O, TS

transmission, when the A/D

converter is in use.

Normal-precision channel

AN017 to AN020

Internal reference voltage input channel

Internal reference voltage

AVCC0 = 1.8 to 5.5 V

—

Temperature sensor input channel

Temperature sensor output

AVCC0 = 1.8 to 5.5 V

—

Input channel from CTSU

CTSU TSCAP voltage

AVCC0 = 1.6 to 5.5 V

—

RA2L1 Datasheet

2. Electrical Characteristics

R01DS0385EJ0100 Rev.1.00

Aug 06, 2020

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