MC68HC05L28 Datasheet, PDF (129/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

12.5
A/D converter characteristics
Table 12-5 A/D converter characteristics
Characteristics
Resolution
Absolute Accuracy⁽¹⁾
Conversion Range ⁽²⁾
V_REFH
V_REFL
Power up time
Input leakage AD5 – AD0
Pin under test = VSS – 0.3V
Pin under test = VDD+0.3V
Conversion time
Monotonicity⁽⁴⁾
Zero input reading (V_IN = 0V)
Ratiometric reading (V_IN = V_REF )
Sample time
Input capacitance
Analog input voltage
Min
8
—
V_SS – 0.1
V_REFL
– 0.1
—
–1
—
32
00
FF
12
—
V_REFL
(1) This figure includes quantization noise
(2) A/D accuracy may decrease proportionally as V_REFH is reduced below 4.0V
(3) TAD = T_CYC if the clock source is the same as the MCU
(4) Inherently guaranteed by the design
Max
8
±1.5
V_DD + 0.1
V_REFH
V_REFH
100
—
1
32
01
FF
12
8
V_REFH
Units
Bits
LSB
V
V
V
ms
µA
µA
TAD ⁽³⁾
Hex
Hex
TAD ⁽³⁾
pF
V
12
MC68HC05L28
ELECTRICAL SPECIFICATIONS
TPG
MOTOROLA
12-5