Datasheet

Appendix A Electrical Characteristics
MC9S12E128 Data Sheet, Rev. 1.07
Freescale Semiconductor 595
A.7 DAC Characteristics
This section describes the characteristics of the digital to analog converter.
A.7.1 DAC Operating Characteristics
A.8 External Bus Timing
A timing diagram of the external multiplexed-bus is illustrated in Figure A-9 with the actual timing values
shown on table Table A-26 and Table A-27. All major bus signals are included in the diagram. While both
a data write and data read cycle are shown, only one or the other would occur on a particular bus cycle.
The expanded bus timings are highly dependent on the load conditions. The timing parameters shown
assume a balanced load across all outputs.
Table A-24. DAC Electrical Characteristics (Operating)
Num C Characteristic Condition Symbol Min Typ Max Unit
1 D DAC Supply V
DDA
3.135 — 5.5 V
2 D DAC Supply Current Running I
DDArun
— — 3.5 mA
D Stop
(low power)
I
DDstop
— — 1.0 mA
3 D Reference Potential Low V
SSA
V
SSA
—V
SSA
V
D High V
REF
V
DDA
/2 — V
DDA
V
4 D Reference Supply Current V
REF
to V
SSA
I
REF
— — 400 mA
5 D Input Current, Channel Off
1
I
OFF
–200 — 1 µA
6 D Operating Temperature Range T –40 — 125
°
C
Table A-25. DAC Timing/Performance Characteristics
Num C Parameters Symbol Min Typ Max Unit
1 D DAC Operating Frequency f
BUS
— — 25 MHz
2 D Integral Non-Linearity INL — 0.25 — Count
3 D Differential Non-Linearity DNL — 0.10 — Count
4 D Resolution RES — — 8 Bit
5 D Settling Time T
S
5—10µs
6 P Absolute Accuracy ABS
ACC
–1 — 1 Count
7 D Offset Error ERR — +/-2.5 — mV