參數(shù)資料
型號(hào)： 38D5
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁數(shù)： 114/141頁
文件大?。?/td> 2027K
代理商： 38D5
Rev.3.01
REJ03B0158-0301
Aug 08, 2007
Page 114 of 134
38D5 Group
NOTES:
1. tc(
φ
AD): one cycle of AD conversion clock. AD conversion clock can be selected from
φ
SOURCE/2 or
φ
SOURCE/8.
φ
SOURCE
represents the X
IN
input in the frequency/2, 4 or 8 mode and internal on-chip oscillator divided by 4 in the on-chip oscillator mode or
the low-speed mode.
When the A/D conversion is executed in the frequency/2 mode, frequency/4 mode, or frequency/8 mode, set f(X
IN
)
≥
500 kHz.
Relationship among AD conversion clock frequency, power source voltage, AD conversion mode and absolute accuracy.
Table 43
A/D converter characteristics
(Vcc = 2.7 to 5.5 V, Ta =
20 to 85
°
C, output transistors in cut-off state, low-speed
on-chip oscillator mode
included, unless otherwise noted)
Symbol
Parameter
Test conditions
Limits
Typ.
Unit
Min.
Max.
10
4
Resolution
Absolute accuracy
(quantification error
excluded)
Bits
LSB
ABS
10bitAD
mode
4.5V
<
V
CC
≤
5.5V,
AD conversion clock
=f(X
IN
)/2, f(X
IN
)/8
≤
6.25MHz
4.0V
<
V
CC
≤
4.5V,
AD conversion clock
=f(X
IN
)/2, f(X
IN
)/8
≤
4MHz
2.7V
≤
V
CC
≤
4.0V,
AD conversion clock
, f(X
IN
)/2, f(X
IN
)/8
≤
VccMHz
2.7V
≤
V
CC
≤
5.5V,
f(OCO)/8, f(OCO)/32
4.5V
<
V
CC
≤
5.5V,
AD conversion clock
=f(X
IN
)/2, f(X
IN
)/8
≤
6.25MHz
4.0V
<
V
CC
≤
4.5V,
AD conversion clock
=f(X
IN
)/2, f(X
IN
)/8
≤
4MHz
2.7V
≤
V
CC
≤
4.0V,
AD conversion clock
=f(X
IN
)/2, f(X
IN
)/8
≤
VccMHz
2.7V
≤
V
CC
≤
5.5V,
f(OCO)/8, f(OCO)/32
10bitAD mode
8bitAD mode
8bitAD
mode
2
t
CONV
Conversion time
(1)
tc(
φ
AD)
×
61
tc(
φ
AD)
×
49
12
50
tc(
φ
AD)
×
62
tc(
φ
AD)
×
50
100
200
μ
s
R
LADDER
Ladder resistor
I
VREF
Reference input
current
I
IA
Analog input
current
35
150
k
μ
A
V
REF
=5V
5.0
μ
A
4.0
4.5
5.5
4.0
6.25
[MHz]
[V]
A
Power source voltage VCC
Note
:
f(XIN)
≥
500kHz
2.7
2.7
10bitAD=4LSB
8bitAD=2LSB
AD conversion clock
frequency/2 mode,
frequency/4 and
frequency/8 mode:
f(XIN)/2 or
f(XIN)/8
0
(Note)
AD conversion clock
Low-speed mode and
on-chip oscillator mode:
f(OCO)/8 or
f(OCO)/32
f(X
IN
)/2 or f(X
IN
)/8
10bitAD=4LSB
8bitAD=2LSB
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