Renesas rl78 User Manual
RL78/G1A
CHAPTER 29 ELECTRICAL SPECIFICATIONS (T
A
=
−40 to +85°C)
R01UH0305EJ0200 Rev.2.00
896
Jul 04, 2013
29.6 Analog Characteristics
29.6.1 A/D converter characteristics
Division of A/D Converter Characteristics
Reference voltag
Input channel
Reference voltage (+) = AV
REFP
Reference voltage (
−) = AV
REFM
Reference voltage (+) = AV
DD
Reference voltage (
−) = AV
SS
Reference voltage (+) = Internal
refrence voltage
Reference voltage (
−) = AV
SS
High-accuracy channel; ANI0 to
ANI12
(input buffer power supply: AV
DD
)
See 29.6.1 (1)
See 29.6.1 (2)
See 29.6.1 (3)
Standard channel; ANI16 to ANI30
(input buffer power supply: V
DD
or
EV
DD0
)
See 29.6.1 (4) See
29.6.1 (5)
See 29.6.1 (6)
Temperature sensor, internal
reference voltage output
See 29.6.1 (4) See
29.6.1 (5)
−
(1) When reference voltage (+) = AV
REFP
/ANI0 (ADREFP1 = 0, ADREFP0 = 1), reference voltage (
−) = AV
REFM
/ANI1
(ADREFM = 1), target for conversion: ANI2 to ANI12
(T
A
=
−40 to +85°C, 2.7 V ≤ AV
REFP
≤ AV
DD
≤ V
DD
≤ 3.6 V, V
SS
= 0 V, AV
SS
= 0 V, Reference voltage (+) = AV
REFP
,
Reference voltage (
−) = AV
REFM
= 0 V, HALT mode)
Parameter Symbol
Conditions MIN.
TYP.
MAX.
Unit
Resolution R
ES
12
bit
Overall error
Notes 1, 2, 3
AINL
12-bit
resolution
±1.7
±3.3 LSB
Conversion time
t
CONV
ADTYP = 0, 12-bit resolution
3.375
μs
Zero-scale error
Notes 1, 2, 3
E
ZS
12-bit
resolution
±1.3
±3.2 LSB
Full-scale error
Notes 1, 2, 3
E
FS
12-bit
resolution
±0.7
±2.9 LSB
Integral linearity error
Notes 1, 2, 3
ILE
12-bit
resolution
±1.0
±1.4 LSB
Differential linearity error
Notes 1, 2, 3
DLE
12-bit
resolution
±0.9
±1.2 LSB
Analog input voltage
V
AIN
0
AV
REFP
V
Notes 1. TYP. Value is the average value at AV
DD
= AV
REFP
= 3 V and T
A
= 25
°C. MAX. value is the average value ±3
σ
at normalized distribution.
2.
These values are the results of characteristic evaluation and are not checked for shipment.
3. Excludes quantization error (
±1/2 LSB).
Cautions 1. Route the wiring so that noise will not be superimposed on each power line and ground line, and
insert a capacitor to suppress noise.
In addition, separate the reference voltage line of AV
REFP
from the other power lines to keep it free
from the influences of noise.
2. During A/D conversion, keep a pulse, such as a digital signal, that abruptly changes its level from
being input to or output from the pins adjacent to the converter pins and P20 to P27 and P150 to
P154.
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