R8C datasheet(29/50 Pages) RENESAS

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REJ03B0320-0010 Rev.0.10

Page 29 of 47

Jul 12, 2010

R8C/3JT Group

5. Electrical Characteristics

Under development Preliminary document

Specifications in this document are tentative and subject to change.

Notes:

1. Vcc/AVcc = Vref = 2.2 V to 5.5 V, Vss = 0 V at Topr =

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

specified.

2. The A/D conversion result will be undefined in wait mode, stop mode, when the flash memory stops, and in low-current-

consumption mode. Do not perform A/D conversion in these states or transition to these states during A/D conversion.

3. 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

Symbol

Parameter

Conditions

Standard

Unit

Min.

Typ.

Max.

—

Resolution

Vref = AVcc

—

Bit

—

Absolute accuracy

10-bit mode

Vref = AVcc = 5.0 V

AN0 to AN7 input

AN8 to AN11 input

—

±3

LSB

Vref = AVcc = 3.3 V

AN0 to AN7 input

AN8 to AN11 input

—

±5

LSB

Vref = AVcc = 3.0 V

AN0 to AN7 input

AN8 to AN11 input

—

±5

LSB

Vref = AVcc = 2.2 V

AN0 to AN7 input

AN8 to AN11 input

—

±5

LSB

8-bit mode

Vref = AVcc = 5.0 V

AN0 to AN7 input

AN8 to AN11 input

—

±2

LSB

Vref = AVcc = 3.3 V

AN0 to AN7 input

AN8 to AN11 input

—

±2

LSB

Vref = AVcc = 3.0 V

AN0 to AN7 input

AN8 to AN11 input

—

±2

LSB

Vref = AVcc = 2.2 V

AN0 to AN7 input

AN8 to AN11 input

—

±2

LSB

φAD

A/D conversion clock

4.0 V

≤ Vref = AVcc ≤ 5.5 V (2)

2—

MHz

3.2 V

≤ Vref = AVcc ≤ 5.5 V (2)

2—

MHz

2.7 V

≤ Vref = AVcc ≤ 5.5 V (2)

2—

MHz

2.2 V

≤ Vref = AVcc ≤ 5.5 V (2)

2—

MHz

—

Tolerance level impedance

—

Ω

tCONV

Conversion time

10-bit mode

Vref = AVcc = 5.0 V,

φAD = 20 MHz

2.2

—

µs

8-bit mode

Vref = AVcc = 5.0 V,

φAD = 20 MHz

2.2

—

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)

0—

Vref

OCVREF On-chip reference voltage

2 MHz

≤ φAD ≤ 4 MHz

1.19

1.34

1.49

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