MB89160/160A Series
5. A/D Converter Electrical Characteristics
(3 MHz, AVCC = VCC = +3.5 V to +6.0 V, AVSS = VSS = 0.0 V, TA = –40°C to +85°C)
Value
Parameter
Resolution
Symbol
Pin
Condition
Unit Remarks
Min.
—
Typ.
—
Max.
8
—
bit
Total error
—
—
±1.5
±1.0
±0.9
LSB
LSB
LSB
mV
—
Linearity error
—
—
Differential linearity error
Zero transition voltage
—
—
AVR = AVCC
AVSS – 1.0 LSB AVSS + 0.5 LSB AVSS + 2.0 LSB
VOT
—
Full-scale transition
voltage
AVR – 3.0 LSB AVR – 1.5 LSB
VFST
AVR
mV
Interchannel disparity
—
—
—
0.5
—
LSB
A/D mode conversion time
44 tinst
µs
—
Sense mode
conversion time
—
12 tinst
—
µs
—
Analog port input current
Analog input voltage
Reference voltage
IAI
—
—
—
—
10
µA
V
AN0 to
AN7
—
—
0.0
2.0
AVR
AVCC
V
AVR = 5.0 V,
when A/D
conversion
is activated
IR
—
—
100
—
—
1
µA
µA
AVR
Reference voltage
supply current
AVR = 5.0 V,
when A/D
conversion
is stopped
IRH
(1) A/D Glossary
• Resolution
Analog changes that are identifiable with the A/D converter.
When the number of bits is 8, analog voltage can be divided into 28=256.
• Linearity error (unit: LSB)
The deviation of the straight line connecting the zero transition point (“0000 0000” ↔ “0000 0001”) with the
full-scale transition point (“1111 1111” ↔ “1111 1110”) from actual conversion characteristics
• Differential linearity error (unit: LSB)
The deviation of input voltage needed to change the output code by 1 LSB from the theoretical value
• Total error (unit: LSB)
The difference between theoretical and actual conversion values
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