# What is a D/A converter?

### **The digital world is binary**

##### 1. The digital world is binary

The digital world is represented in binary, but hexadecimal, which is compatible with binary and more easily understood by people, is commonly used.

Binary uses only the numbers 0 and 1. However, in some cases L/H is used as a counterpart to 0/1 notation.

Base 10=Decimal Base 2=Binary Base 16=Hexadecimal

In order to indicate which base is used d, b, and h are added to the end of the number.

###### 【Ex】

11d（of course 11 in decimal）、11b（3 in decimal）、11h(=17d)

##### 2. Decimal ⇔Binary⇔Hexadecimal conversion

###### 【Decimal⇔Binary⇔Hexadecimal conversion】

Decimal | Binary | Hexadecimal | ||
---|---|---|---|---|

63 | 0000 0011 1111 | 0 | 3 | F |

127 | 0000 0111 1111 | 0 | 7 | F |

255 | 0000 1111 1111 | 0 | F | F |

1023 | 0011 1111 1111 | 3 | F | F |

4095 | 1111 1111 1111 | F | F | F |

##### 3.Numbers that are important to remember

Increasing a binary number by one digit can double the value.

The values in red are often used by A/D and D/A converters.

3bit=8combinations 4bit=16combinations 5bit=32combinations 6bit=64combinations

7bit=128combinations 8bit=256combinations 9bit=512combinations 11bit=2048combinations

12bit=4096combinations 14bit=16384combinations 16bit=65536combinations

###### 【What are bits?】

A single binary digit, which is either 0 or 1, is also referred to as a bit.