Switching Characteristics; Aid Converter Characteristics - Motorola MC6805R Series Advance Information

MC68705R3 AND MC68705R5
11.6.3 Switching Characteristics (VCC= +5.25 Vdc ±O.5 Vdc, VSS=O' Vdc, TA=Oo to 70°C
unless otherwise noted)
Characteristic Symbol Min Typ Max Unit
Oscillator Frequency
Normal
fos c
0.4
-
4.2 MHz
Instruction Cycle Time (4/foscl
tcyc
0.950 - 10
P.s
INT, INT2, or Timer Pulse Width
tWL,tWH
tcyc+ 250
- -
ns
RESET Pulse Width
tRWL
tcyc+ 250 - -
ns
RESET Delay Time (External Cap= 1.0 p.Fl
tRHL
-
100
-
ms
INT Zero Crossing Detection Input Frequency
flNT
0.03 -
1.0 kHz
External Clock Duty Cycle (EXT All
-
40 50
60
%
Crystal Oscillator Start-Up Timei*
-
-
-
100
ms
*
See Figure 7-5 for tYPical crystal parameters.
11.6.4 AID Converter Characteristics (VCC= +5.25 V ±O.5 Vdc, VSS=O Vdc, TA=O° to 70°C
unless otherwise noted)
Characteristic Min Typ Max Unit Comments
Resolution
8 8 8 Bits
Non-Linearity
I
- -
±
1/2
LSB
For VRH=4.0 to 5.0 V and VRL =0 V.
Quantitizing Error -
-
±
1/2 LSB
Conversion Range
VRL
-
VRH
V
VRH
-
. '
-
VCC
V
A/ D accuracy may decrease proportionately as
VRL
VSS
-
0.2 V
VRH is reduced below 4.0 V. The sum of VRH and
VRL must not exceed VCC.
Conversion Time 30 30 30
tcyc
Includes sampling time
Monotonicity
Inherent (within total error)
Zero Input Reading
00 00
01 hexadecimal
Vin=O
Ratiometric Reading FE FF FF hexadecimal
Vin=VRH
Sample Time
5 5
5
tcyc
Sample/Hold Capacitance, Input -
-
25 pF
Analog Input Voltage
VRL
-
VRH
V
Negative transients on any analog lines (pins 19-24)
are not allowed at any time during conversion.
11-9