R8C3GA datasheet(29/56 Pages) RENESAS

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R8C/3GA Group

5. Electrical Characteristics

REJ03B0235-0110 Rev.1.10 Sep. 10, 2009

Page 29 of 53

Notes:

VCC/AVCC = Vref = 2.2 to 5.5 V, VSS = 0 V at Topr =

−20 to 85°C (N version) / −40 to 85°C (D version), unless otherwise

specified.

When the CPU and flash memory stop, the A/D conversion result will be undefined.

When the analog input voltage is over the reference voltage, the A/D conversion result will be 3FFh in 10-bit mode and FFh in

8-bit mode.

Table 5.3

A/D Converter Characteristics (1)

Symbol

Parameter

Conditions

Standard

Unit

Min.

Typ.

Max.

−

Resolution

Vref = AVCC

−−

Bit

−

Absolute accuracy

10-bit mode

Vref = AVCC = 5.0 V

AN0, AN1, AN5, AN6 input,

AN8 to AN11 input

−−

±3

LSB

Vref = AVCC = 3.3 V

AN0, AN1, AN5, AN6 input,

AN8 to AN11 input

−−

±5

LSB

Vref = AVCC = 3.0 V

AN0, AN1, AN5, AN6 input,

AN8 to AN11 input

−−

±5

LSB

Vref = AVCC = 2.2 V

AN0, AN1, AN5, AN6 input,

AN8 to AN11 input

−−

±5

LSB

8-bit mode

Vref = AVCC = 5.0 V

AN0, AN1, AN5, AN6 input,

AN8 to AN11 input

−−

±2

LSB

Vref = AVCC = 3.3 V

AN0, AN1, AN5, AN6 input,

AN8 to AN11 input

−−

±2

LSB

Vref = AVCC = 3.0 V

AN0, AN1, AN5, AN6 input,

AN8 to AN11 input

−−

±2

LSB

Vref = AVCC = 2.2 V

AN0, AN1, AN5, AN6 input,

AN8 to AN11 input

−−

±2

LSB

φAD

A/D conversion clock

4.0 V

≤ Vref = AVCC ≤ 5.5 V (2)

−

MHz

3.2 V

≤ Vref = AVCC ≤ 5.5 V (2)

−

MHz

2.7 V

≤ Vref = AVCC ≤ 5.5 V (2)

−

MHz

2.2 V

≤ Vref = AVCC ≤ 5.5 V (2)

−

5MHz

−

Tolerance level impedance

−

Ω

DNL

Differential non-linearity error

−−

±1

LSB

tCONV

Conversion time

10-bit mode

Vref = AVCC = 5.0 V,

φAD = 20 MHz

2.15

−−

µs

8-bit mode

Vref = AVCC = 5.0 V,

φAD = 20 MHz

2.15

−−

µs

tSAMP

Sampling time

φAD = 20 MHz

0.75

−−

µs

IVref

Vref current

VCC = 5.0 V, XIN = f1 =

φAD = 20 MHz

−

−µA

Vref

Reference voltage

2.2

−

AVCC

VIA

Analog input voltage (3)

−

Vref

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