4524 Datasheet, PDF (155/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
A/D CONVERTER RECOMMENDED OPERATING CONDITIONS
(Comparator mode selected, Ta = –20 °C to 85 °C, unless otherwise noted)
Symbol
Parameter
Conditions
VDD
Supply voltage
VIA
f(XIN)
Analog input voltage
Oscillation frequency
Ta = 25 °C
Ta = –20 to 85 °C
VDD = 2.7 to 5.5 V
f(STCK) = f(XIN)/8
f(STCK) = f(XIN)/4
f(STCK) = f(XIN)/2
f(STCK) = f(XIN)
Limits
Unit
Min.
Typ.
Max.
2.7
5.5
V
3
5.5
0
VDD
V
0.8
MHz
0.4
0.2
0.1
A/D CONVERTER CHARACTERISTICS
(Ta = –20 °C to 85 °C, unless otherwise noted)
Symbol
Parameter
Test conditions
–
–
–
V0T
VFST
IADD
TCONV
–
–
–
Resolution
Linearity error
Differential non-linearity error
Zero transition voltage
Full-scale transition voltage
A/D operating current
(Note 1)
A/D conversion time
Comparator resolution
Comparator error (Note 2)
Comparator comparison time
Ta = 25 °C, VDD = 2.7 V to 5.5 V
Ta = –20 °C to 85 ° C, VDD = 3 V to 5.5 V
Ta = 25 °C, VDD = 2.7 V to 5.5 V
Ta = –20 °C to 85 ° C, VDD = 3 V to 5.5 V
VDD = 5.12 V
VDD = 3.072 V
VDD = 5.12 V
VDD = 3.072 V
VDD = 5 V
VDD = 3 V
f(XIN) = 6 MHz f(STCK) = f(XIN)/8
f(STCK) = f(XIN)/4
f(STCK) = f(XIN)/2
f(STCK) = f(XIN)
VDD = 5.12 V
VDD = 3.072 V
f(XIN) = 6 MHz
f(STCK) = f(XIN)/8
f(STCK) = f(XIN)/4
f(STCK) = f(XIN)/2
f(STCK) = f(XIN)
Min.
0
0
5110
3063
Limits
Typ.
10
6
5120
3069
0.3
0.1
Unit
Max.
10
bits
±2
LSB
±0.9 LSB
20
mV
12
5130 mV
3075
0.9
mA
0.3
248
µs
124
62
31
8
bits
±20
mV
±15
32
µs
16
8
4
Notes 1: When the A/D converter is used, IADD is added to IDD (supply current).
2: As for the error from the ideal value in the comparator mode, when the contents of the comparator register is n, the logic value of the comparison
voltage Vref which is generated by the built-in DA converter can be obtained by the following formula.
Logic value of comparison voltage Vref
VDD
Vref =
✕n
256
n = Value of register AD (n = 0 to 255)
Rev.2.00 Jul 27, 2004 page 155 of 159
REJ03B0091-0200Z