Datasheet

5.0-Volt ADC Characteristics
MC68HC908GR16A Data Sheet, Rev. 1.0
Freescale Semiconductor 255
20.10 5.0-Volt ADC Characteristics
Characteristic
(1)
1. V
DD
= 5.0 Vdc ± 10%, V
SS
= 0 Vdc, V
DDAD/VREFH
= 5.0 Vdc ± 10%, V
SSAD/
V
REFL
= 0 Vdc
Symbol Min Max Unit Comments
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
0V
DDAD
VV
ADIN
<= V
DDAD
Resolution B
AD
10 10 Bits
Absolute accuracy A
AD
–4 +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
SSA
Full-scale reading F
ADI
3FC 3FF Hex V
ADIN
= V
DDA
Input capacitance C
ADI
— 30 pF Not tested
V
DDAD
/V
REFH
current I
VREF
—1.6mA
Absolute accuracy
(8-bit truncation mode)
A
AD
–1 +1 Counts Includes quantization
Quantization error
(8-bit truncation mode)
— –1/8 +7/8 LSB