Datasheet

78K0/Ix2 CHAPTER 11 A/D CONVERTER
R01UH0010EJ0500 Rev.5.00 364
Feb 28, 2012
CHAPTER 11 A/D CONVERTER
78K0/IY2 78K0/IA2 78K0/IB2 Item
16 pins 20 pins 30 pins 32 pins
10-bit A/D converter 5 ch 6 ch 9 ch
11.1 Function of A/D Converter
The A/D converter converts an analog input signal into a digital value, and consists of up to 9 channels (ANI0 to ANI8)
with a resolution of 10 bits.
In products with operational amplifier, ANI1 functions alternately as operational amplifier output (AMPOUT)/PGA input
(PGAIN). This enables using operational amplifier output or PGA output as an analog input source.
Furthermore, the internal voltage (1.2 V) can be used as an analog input source.
The A/D converter has the following function.
 10-bit resolution A/D conversion
10-bit resolution A/D conversion is carried out repeatedly for one analog input channel selected from ANI0 to ANI8,
operational amplifier output, PGA output, and internal voltage (1.2 V). Each time an A/D conversion operation ends,
an interrupt request (INTAD) is generated.
Remark A/D converter analog input pins differ depending on products.
 78K0/IY2: ANI0, ANI1, ANI3 to ANI5
 78K0/IA2: ANI0 to ANI5
 78K0/IB2: ANI0 to ANI8