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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 (−) = AVREFM
Reference voltage (+) = AVDD
Reference voltage (−) = AVSS
Reference voltage (+) = Internal
refrence voltage
Reference voltage (−) = AVSS
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 (−) = AVREFM/ANI1
(ADREFM = 1), target for conversion: ANI2 to ANI12
(T
A = −40 to +85°C, 2.7 V ≤ AVREFP ≤ AVDD ≤ VDD ≤ 3.6 V, VSS = 0 V, AVSS = 0 V, Reference voltage (+) = AVREFP,
Reference voltage (−) = AVREFM = 0 V, HALT mode)
Parameter Symbol Conditions MIN. TYP. MAX. Unit
Resolution RES 12 bit
Overall error
Notes 1, 2, 3
AINL 12-bit resolution ±1.7 ±3.3 LSB
Conversion time tCONV ADTYP = 0, 12-bit resolution 3.375
μ
s
Zero-scale error
Notes 1, 2, 3
EZS 12-bit resolution ±1.3 ±3.2 LSB
Full-scale error
Notes 1, 2, 3
EFS 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 VAIN 0 AVREFP V
Notes 1. TYP. Value is the average value at AV
DD = AVREFP = 3 V and TA = 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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