RA4W1 datasheet(77/105 Pages) RENESAS

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R01DS0359EJ0100 Rev.1.00

Page 77 of 105

Mar 31, 2020

RA4W1 Datasheet

2. Electrical Characteristics

Note:

The characteristics apply when no pin functions other than 14-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.

Figure 2.64

Equivalent circuit for analog input

DNL differential nonlinearity error

±1.0

LSB

INL integral nonlinearity error

±1.0

±3.0

LSB

14-bit mode

Resolution

Bit

Conversion time*1

(Operation at

PCLKC = 8 MHz)

Permissible signal

source impedance

Max. = 5 kΩ

7.50

μs

High-precision channel

ADCSR.ADHSC = 1

ADSSTRn.SST[7:0] = 0Dh

10.88

μs

Normal-precision channel

ADCSR.ADHSC = 1

ADSSTRn.SST[7:0] = 28h

Offset error

±4.0

±30.0

LSB

High-precision channel

±40.0

LSB

Other than above

Full-scale error

±6.0

±30.0

LSB

High-precision channel

±40.0

LSB

Other than above

Quantization error

±0.5

LSB

Absolute accuracy

±12.0

±32.0

LSB

High-precision channel

±48.0

LSB

Other than above

DNL differential nonlinearity error

±4.0

LSB

INL integral nonlinearity error

±4.0

±12.0

LSB

Table 2.46

14-bit A/D converter channel classification (1 of 2)

Classification

Channel

Conditions

Remarks

High-precision channel

AN004 to AN006, AN009,

AN010

AVCC0 = 1.8 to 3.6 V

Pins AN004 to AN006, AN009 and

AN010 cannot be used as general I/

O, IRQ3 inputs, and TS transmission,

when the A/D converter is in use

Normal-precision channel

AN017, AN019, AN020

Internal reference voltage

input channel

Internal reference voltage

AVCC0 = 2.0 to 3.6 V

Table 2.45

A/D conversion characteristics (5) in low power A/D conversion mode (2 of 2)

Conditions: VCC = AVCC0 = 1.8 to 3.6 V (AVCC0 = VCC when VCC < 2.0 V), VREFH0 = 1.8 to 3.6 V

Reference voltage range applied to the VREFH0 and VREFL0.

Parameter

Min

Typ

Max

Unit

Test conditions

Cin

ADC

MCU

Analog input

ANn

Analog input

ANn

Sensor

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