Freescale Semiconductor, Inc.
Electrical Specifications
Tables of Data
Table 19-7. ATD AC Characteristics (Operating)
V
DD = 5.0 Vdc ±10%, VSS = 0 Vdc, TA = TL to TH, ATD Clock = 2 MHz, unless otherwise noted
Characteristic
Symbol
Min
2.0
0.5
Max
8.0
2.0
Unit
MHz
MHz
fPCLK
MCU clock frequency (p-clock)
ATD operating clock frequency
fATDCLK
ATD 8-Bit conversion period
clock cycles(1)
nCONV8
tCONV8
18
9
32
16
cycles
µs
conversion time(2)
ATD 10-Bit conversion period
clock cycles(1)
nCONV10
tCONV10
20
10
34
17
cycles
µs
conversion time(2)
Stop and ATD power up recovery time(3)
VDDA = 5.0V
tSR
10
µs
1. The minimum time assumes a final sample period of 2 ATD clock cycles while the maximum time assumes a final sample
period of 16ATD clocks.
2. This assumes an ATD clock frequency of 2.0MHz.
3. From the time ADPU is asserted until the time an ATD conversion can begin.
Table 19-8. ATD Maximum Ratings
Characteristic
Symbol
Value
Units
ATD reference voltage
V
RH ≤ VDDA
VRH
VRL
−0.3 to +6.5
−0.3 to +6.5
V
V
VRL ≥ VSSA
V
SS differential voltage
DD differential voltage
|VSS−VSSA|
0.1
V
VDD−VDDA
DDA−VDD
6.5
0.3
V
V
V
V
VREF differential voltage
Reference to supply differential voltage
|VRH−VRL
|
6.5
6.5
V
V
|VRH−VDDA
|
MC68HC912DG128 — Rev 3.0
Technical Data
Electrical Specifications
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