mc56f8006 Freescale Semiconductor, Inc, mc56f8006 Datasheet - Page 63

• Manufacturer Part Number: mc56f8006
• Description: Digital Signal Controller
• Manufacturer: Freescale Semiconductor, Inc

8.16
Freescale Semiconductor
1
2
3
ADC conversion
Input resistance
Characteristic
Analog source
Typical values assume V
reference only and are not tested in production.
V
V
Input voltage
capacitance
resistance
REFL
REFH
clock freq.
Input
V
= V
AS
= V
ADC Specifications
SSA
DDA
+
–
12-bit mode
10-bit mode
8-bit mode (all valid f
High speed (ADLPC=0)
Low power (ADLPC=1)
R
AS
f
f
f
f
ADCK
ADCK
ADCK
ADCK
DDAD
Conditions
Figure 35. ADC Input Impedance Equivalency Diagram
> 4 MHz
< 4 MHz
> 4 MHz
< 4 MHz
MC56F8006/MC56F8002 Digital Signal Controller, Rev. 2
= 3.0 V, Temp = 25°C, f
C
AS
Z
AS
ADCK
Table 35. ADC Operating Conditions
)
V
+
–
ADIN
Input Pin Equivalent
Symb
C
R
V
f
INPUT PIN
INPUT PIN
INPUT PIN
Pad
leakage
due to
input
protection
ADCK
R
ADIN
ADIN
ADIN
AS
ADCK
Simplified
Circuit
= 1.0 MHz unless otherwise stated. Typical values are for
V
REFL
Min
0.4
0.4
—
—
—
—
—
—
—
2
Typ
4.5
—
—
—
—
—
—
—
—
5
Z
1
ADIN
Channel Select
V
R
R
R
R
Max
REFH
5.5
8.0
4.0
10
10
Simplified
ADIN
ADIN
ADIN
ADIN
7
2
5
5
Circuit
3
Unit
MHz
kΩ
kΩ
pF
V
C
External to MCU
ADIN
ADC SAR
Engine
Comment
Specifications
63