Freescale Semiconductor MC68HC908MR32 - Manual (Page 274)

Electrical Specifications
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
274 Freescale Semiconductor
19.13 Analog-to-Digital Converter (ADC) Characteristics
Characteristic Symbol Min Typ Max Unit Notes
Supply voltage V
DDAD
4.5 — 5.5 V
V
DDAD
should be tied to
the same potential as
V
DD
via separate traces
Input voltages V
ADIN
0 — V
DDAD
V V
ADIN
<= V
DDAD
Resolution B
AD
10 — 10 Bits
Absolute accuracy A
AD
— —
± 4
LSB Includes quantization
ADC internal clock f
ADIC
500 k — 1.048 M Hz t
AIC
= 1/f
ADIC
Conversion range R
AD
V
SSAD
— V
DDAD
V
Power-up time t
ADPU
16 — — t
AIC
cycles
Conversion time t
ADC
16 — 17 t
AIC
cycles
Sample time t
ADS
5 — — t
AIC
cycles
Monotonicity M
AD
Guaranteed
Zero input reading Z
ADI
000 — 003 Hex V
ADIN
= V
SSAD
Full-scale reading F
ADI
3FC — 3FF Hex V
ADIN
= V
DDAD
Input capacitance C
ADI
— — 30 pF Not tested
V
REFH
/V
REFL
current I
VREF
— 1.6 — mA
Absolute accuracy
(8-bit truncation mode)
A
AD
— — ± 1 LSB Includes quantization
Quantization error
(8-bit truncation mode)
— — —
+ 7/8
– 1/8
LSB