M3087BFKBGP datasheet(72/91 Pages) RENESAS

72 / 91 page

M32C/87 Group (M32C/87, M32C/87A, M32C/87B)

5. Electrical Characteristics

REJ03B0127-0151 Rev.1.51 Jul 31, 2008

Page 72 of 85

Table 5.34

A/D Conversion Characteristics

(VCC1 = VCC2 = AVCC = VREF = 3.0 to 3.6 V, VSS = AVSS = 0 V, Topr = -20 to 85

°C,

f(CPU) = 24MHz unless otherwise specified)

NOTES:

1. The value when

φAD frequency is at 10 MHz. Keep φAD frequency at 10 MHz or lower.

If f(CPU) (=fAD) is 24 MHz, divide f(CPU) by 3 to make it 8 MHz. The conversion time in this case is 6.1

μs.

2. Sample and hold function is not available.

Table 5.35

D/A Conversion Characteristics

(VCC1 = VCC2 = VREF = 3.0 to 3.6 V, VSS = AVSS = 0 V, Topr = -20 to 85

°C,

f(CPU) = 24MHz unless otherwise specified)

NOTE:

1. Measurement when one D/A converter is used, and the DAi register (i = 0, 1) of the unused D/A converter is set

to 00h. The current flown into the resistor ladder in the A/D converter is excluded. IVREF flows even if VCUT

bit in the AD0CON1 register is set to 0 (VREF not connected)

Symbol

Parameter

Measurement Condition

Standard

Unit

Min.

Typ.

Max.

−

Resolution

VREF = VCC1

Bits

INL

Integral nonlinearity error (8-bit)

VREF = VCC1 = VCC2 = 3.3 V

±2

LSB

DNL

Differential nonlinearity error (8-bit)

±1

LSB

−

Offset error (8-bit)

±2

LSB

−

Gain error (8-bit)

±2

LSB

RLADDER Resistor ladder

VREF = VCC1

tCONV

8-bit conversion time(1)(2)

4.9

μs

VREF

Reference voltage

VCC1

VIA

Analog input voltage

VREF

Symbol

Parameter

Measurement Condition

Standard

Unit

Min.

Typ.

Max.

−

Resolution

8Bits

−

Absolute accuracy

1.0

tsu

Setup time

μs

Output resistance

IVREF

Reference power supply

input current

(note 1)

1.0

VCC1 = VCC2 = 3.3 V

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