MC68HC11P2 Datasheet, PDF (241/268 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Electrical Specifications
Control timing
12.7.2 Analog-to-digital converter characteristics
(V_DD = 5.0 Vdc ± 10%, V_SS = 0 Vdc, T_A = T_L to T_H, 750kHz ″ E ″ 4MHz, unless otherwise noted)
Characteristic
Parameter
Min. Absolute ^{2MHz(1) 3MHz(1) 4MHz(1)} Unit
Max. Max. Max.
Resolution Number of bits resolved by ADC
—
8
—
—
— bits
Non-linearity
Maximum deviation from the ideal ADC
transfer characteristics
—
—
±0.5
±1
±1 LSB
Zero error
Difference from the output of an ideal ADC for
zero input voltage
—
—
±0.5
±1
±1 LSB
Full-scale
error
Difference from the output of an ideal ADC for
full-scale input voltage
—
—
±0.5
±1
±1 LSB
Total
unadjusted
error
Maximum sum of non-linearity, zero and full-
scale errors
—
—
±0.5 ±1.5 ±1.5 LSB
Quantization
error
Uncertainty due to converter resolution
—
—
±0.5 ±0.5 ±0.5 LSB
Absolute
accuracy
Difference between the actual input voltage
and the full-scale weighted equivalent of the —
binary output code, including all error sources
—
±1
±2
±2 LSB
Conversion
range
Analog input voltage range
V_RL
—
V_RH
V_RH
V_RH V
V_RH
Analog reference voltage (high) ⁽²⁾
V_RL
— V_DD+0.1 V_DD+0.1 V_DD+0.1 V
V_RL
Analog reference voltage (low) ⁽²⁾
V_SS–0.1 —
V_RH
V_RH
V_RH V
∅V_R
Minimum difference between V_RH and V_RL ⁽²⁾ 3
—
—
—
—V
Conversion
time
Total time to perform a single A/D conversion:
E clock
Internal RC oscillator
—
—
Monotonicity
Conversion result never decreases with an
increase in input voltage and has no missing codes
32
—
—
— t_CYC
—
t_CYC+32 t_CYC+32 t_CYC+32 _µs
Guaranteed
Zero input
reading
Conversion result when V_IN = V_RL
$00
—
—
—
— Hex
Full-scale
reading
Conversion result when V_IN = V_RH
—
—
$FF
$FF
$FF Hex
Sample
Analogue input acquisition sampling time:
acquisition E clock
—
12
—
—
— t_CYC
time
Internal RC oscillator
—
—
12
12
12 µs
Sample/hold
capacitance
Input capacitance (PE[0:7]) during sample
— 20 (typ) —
—
— pF
Input
leakage
Input leakage on A/D pins:
PE[0:7]
V_RL, V_RH
—
—
400
400
400 nA
—
—
1.0
1.0
1.0 µA
MC68HC11P2 — Rev 1.0
Electrical Specifications
For More Information On This Product,
Go to: www.freescale.com
Technical Data