MB90610A Series
5. A/D Converter Electrical Characteristics
(AVCC = VCC = +2.7 V to +5.5 V, AVSS = VSS = 0.0 V, 2.7 V ≤ AVRH – AVRL, TA = –40°C to +85°C)
Value
Typ.
10
Parameter
Symbol Pin name
Unit
Min.
—
Max.
10
Resolution
Total error
—
—
—
—
—
—
—
—
bit
—
—
±3.0
±2.0
±1.5
LSB
LSB
LSB
Linearity error
—
—
Differential linearity error
—
—
AN0 to
AN7
AVRL +
0.5
AVRL +
2.5
Zero transition voltage
VOT
VFST
AVRL – 1.5
LSB
LSB
AN0 to
AN7
AVRH –
4.5
AVRH –
1.5
AVRH +
0.5
Full scale transition voltage
Conversion time
6.125*1
12.25*2
—
—
—
—
µs
µs
—
—
AN0 to
AN7
Analog port input current
Analog input voltage
IAIN
—
0.1
—
—
—
10
µA
V
AN0 to
AN7
VAIN
AVRL
AVRH
AVCC
AVRL +
2.7
—
AVRH
AVRL
V
Reference voltage
AVRH –
2.7
—
0
V
IA
AVCC
—
—
—
—
3
—
—
5*3
—
5*3
mA
µA
µA
µA
Power supply current
IAH
IR
AVCC
AVRH
AVRH
200
—
Reference voltage supply current
Variation between channels
IRH
AN0 to
AN7
—
—
—
4
LSB
*1: For VCC = +5.0 V±10% and a 16 MHz machine clock
*2: For VCC = +3.0 V±10% and a 8 MHz machine clock
*3: The current when the A/D converter is not operating or the CPU is in stop mode (for VCC = AVCC = AVRH = +5.0 V).
Notes: • The relative error increases as |AVRH – AVRL| decreases.
• The output impedance of the external circuit for the analog input should be in the following range.
Output impedance of external circuit < approx. 7 kΩ
• If the output impedance of the external circuit is too high, the sampling time for the analog voltage may be
too short. (Sampling time = 3.75 µs @4 MHz (This corresponds to 16 MHz internal operation if the multiplier
is 4.))
• For an external capacitor to be provided outside the chip, its capacity should desirably be thousands times
larger than that of the capacity in the chip taking in consideration the influence of the capacity distribution
of the external and internal capacitors.
68
FUJITSU [ FUJITSU ]
