Freescale Semiconductor *KE02 Series, Технические данные инструкция

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Table 14. 5 V 12-bit ADC operating conditions (continued)
Characteri
stic
Conditions Symbol Min Typ
1
Max Unit Comment
Input
resistance
R
ADIN
— 3 5 kΩ —
Analog
source
resistance
12-bit mode
• f
ADCK
> 4 MHz
• f
ADCK
< 4 MHz
R
AS
—
—
—
—
2
5
kΩ External to
MCU
10-bit mode
• f
ADCK
> 4 MHz
• f
ADCK
< 4 MHz
—
—
—
—
5
10
8-bit mode
(all valid f
ADCK
)
— — 10
ADC
conversion
clock
frequency
High speed (ADLPC=0) f
ADCK
0.4 — 8.0 MHz —
Low power (ADLPC=1) 0.4 — 4.0
1. Typical values assume V
DDA
= 5.0 V, Temp = 25°C, f
ADCK
=1.0 MHz unless otherwise stated. Typical values are for
reference only and are not tested in production.
ADC SAR
ENGINE
SIMPLIFIED
CHANNEL SELECT
CIRCUIT
SIMPLIFIED
INPUT PIN EQUIVALENT
CIRCUIT
Pad
leakage
due to
input
protection
Z
AS
R
AS
C
AS
v
ADIN
v
AS
z
ADIN
R
ADIN
R
ADIN
R
ADIN
R
ADIN
INPUT PIN
INPUT PIN
INPUT PIN
C
ADIN
Figure 16. ADC input impedance equivalency diagram
Table 15. 12-bit ADC characteristics (V
REFH
= V
DDA
, V
REFL
= V
SSA
)
Characteristic Conditions C Symbol Min Typ
1
Max Unit
Supply current
ADLPC = 1
ADLSMP = 1
T I
DDA
— 133 — µA
Table continues on the next page...
Peripheral operating requirements and behaviors
KE02 Sub-Family Data Sheet, Rev4, 10/2014.
Freescale Semiconductor, Inc. 25