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Electrical Characteristics
Freescale Semiconductor
27
Figure 7. ADC Input Impedance Equivalency Diagram
10
fADCK ADC Conversion Clock
Frequency
ADLPC=0, ADHSC=1
1.0
—
8.0
MHz
D
ADLPC=0, ADHSC=0
1.0
—
5.0
MHz
D
ADLPC=1, ADHSC=0
1.0
—
2.5
MHz
D
1 Typical values assume V
DDA = 3.0 V, Temp = 25 C, fADCK=1.0 MHz unless otherwise stated. Typical values are for
reference only and are not tested in production.
2 DC potential difference.
Table 15. 16-Bit ADC Operating Conditions (Continued)
#
Symb
Characteristic
Conditions
Min
Typ1
Max
Unit
C
Comment
+
–
+
–
VAS
RAS
CAS
VADIN
ZAS
Pad
leakage
due to
input
protection
ZADIN
SIMPLIFIED
INPUT PIN EQUIVALENT
CIRCUIT
RADIN
ADC SAR
ENGINE
SIMPLIFIED
CHANNEL SELECT
CIRCUIT
INPUT PIN
RADIN
CADIN
INPUT PIN
RADIN
INPUT PIN
RADIN
Freescale reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.