MB90210 Series
72
5. A/D Converter Electrical Characteristics
Single-chip mode MB90214/P214B/W214B:
(AVCC = VCC = +5.0
±10%, AVSS = VSS = 0.0 V, TA = –40°C to +105°C, +4.5 V
AVRH – AVRL)
Single-chip mode MBP90214A/W214A:
(AVCC = VCC = +5.0
±10%, AVSS = VSS = 0.0 V, TA = –40°C to +85°C, +4.5 V
AVRH – AVRL)
External bus mode:
(AVCC = VCC = +5.0
±10%, AVSS = VSS = 0.0 V, TA = –40°C to +70°C, +4.5 V
AVRH – AVRL)
* : The current value applies to the CPU stop mode with the A/D converter inactive (VCC = AVCC = AVRH = +5.5 V).
Notes: (1) The smaller the | AVRH – AVRL |, the greater the error would become relatively.
(2) Use the output impedance of the external circuit for analog input under the following conditions:
External circuit output impedance < approx. 10 k
(Sampling period 3.75 s, tCYC = 62.5 ns)
(3) Precision values are standard values applicable to sleep mode.
(4) If VCC/AVCC or VSS/AVSS is caused by a noise to drop to below the analog input voltage, the analog input
current is likely to increase. In such cases, a bypass capacitor or the like should be provided in the external
circuit to suppress the noise.
Parameter
Symbol
Pin name
Condition
Value
Unit
Remarks
Min.
Typ.
Max.
Resolution
n
—
10
bit
Total error
—
–3.0
—
+3.0
LSB
Linearity error
—
–2.0
—
+2.0
LSB
Differential
linearity error
——
—
±1.5
LSB
Zero transition
voltage
VOT
AN0 to AN7
—
AVRL – 1.5 AVRL + 0.5 AVRL + 2.5
LSB
Full-scale
transition voltage
VFST
—
AVRH – 3.5 AVRH – 1.5 AVRH + 0.5
LSB
Conversion time
Sampling period
TCONV
—
tCYC = 62.5 ns
6.125
—
s
98 machine
cycles
TSAMP
—3.75
—
s
60 machine
cycles
Analog port input
current
IAIN
AN0 to AN7
——
—
±0.1
A
Analog input
voltage
VAIN
—
AVRL
—
AVRH
V
Analog reference
voltage
—
AVRH
—
AVRL
—
AVCC
V
AVRL
—
AVSS
—AVRH
V
Reference voltage
supply current
IR
AVRH
——
200
500
A
IRH
——
—
5*
A
Interchannel
disparity
—
AN0 to AN7
—
4
LSB
≤
—
=
.