R7FA2L1AB2DFN datasheet(67/110 Pages) RENESAS

67 / 110 page

Table 2.43

A/D internal reference voltage characteristics

Conditions: VCC = AVCC0 = VREFH0 = 1.8 to 5.5 V*1

Parameter

Min

Typ

Max

Unit

Test conditions

Internal reference voltage input channel*2

1.42

1.48

1.54

—

PCLKD (ADCLK) frequency*3

—

MHz

—

Sampling time*4

5.0

—

µs

—

Note 1. The internal reference voltage cannot be selected for input channels when AVCC0 < 1.8 V.

Note 2. The 12-bit A/D internal reference voltage indicates the voltage when the internal reference voltage is input to the 12-bit A/D

converter.

Note 3. When the internal reference voltage is selected as the high-potential reference voltage.

Note 4. When the internal reference voltage is converted.

Integral nonlinearity

error (INL)

Actual A/D conversion

characteristic

Ideal A/D conversion

characteristic

Analog input voltage

Offset error

Absolute accuracy

Differential nonlinearity error (DNL)

Full-scale error

0xFFF

0x000

Ideal line of actual A/D

conversion characteristic

1-LSB width for ideal A/D

conversion characteristic

Differential nonlinearity error (DNL)

1-LSB width for ideal A/D

conversion characteristic

VREFH0

(full-scale)

A/D converter

output code

Figure 2.39

Illustration of 12-bit A/D converter characteristic terms

Absolute accuracy

Absolute accuracy is the difference between output code based on the theoretical A/D conversion characteristics, and the

actual A/D conversion result. When measuring absolute accuracy, the voltage at the midpoint of the width of the analog

input voltage (1-LSB width), which can meet the expectation of outputting an equal code based on the theoretical A/D

conversion characteristics, is used as the analog input voltage. For example, if 12-bit resolution is used and the reference

voltage VREFH0 = 3.072 V, then 1-LSB width becomes 0.75 mV, and 0 mV, 0.75 mV, and 1.5 mV are used as the analog

RA2L1 Datasheet

2. Electrical Characteristics

R01DS0385EJ0100 Rev.1.00

Aug 06, 2020

Page 67 of 110

R7FA2L1AB2DFN Scheda tecnica(PDF) 67 Page - Renesas Technology Corp

R7FA2L1AB2DFN Scheda tecnica(HTML) 67 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL