Otp rom 6.2 ac electrical characteristic, 3 a/d converter characteristic, 4 comparator(op) characteristic – ELAN Home Systems EM78P458 User Manual
Page 58
EM78P458/459
OTP ROM
6.2 AC Electrical Characteristic
(Ta=0
°C ~ 70 °C, VDD=5V±5%, VSS=0V)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Dclk
Input CLK duty cycle
45
50
55
%
Tins
Instruction cycle time
(CLKS="0")
Crystal type
RC type
100
500
DC
DC
ns
ns
Ttcc
TCC input period
(Tins+20)/N*
ns
Tdrh Device
reset hold time
Ta = 25
°C
9 18
30
ms
Trst /RESET
pulse
width Ta = 25
°C
2000 ns
Twdt
Watchdog timer period
Ta = 25
°C
9 18
30
ms
Tset
Input pin setup time
0
ms
Thold
Input pin hold time
20
ms
Tdelay
Output pin delay time
Cload=20pF
50
ms
*N= selected prescaler ratio.
6.3 A/D Converter Characteristic
(Vdd=3.0V to 5.5V,Vss=0V,Ta=0 to 70℃)
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
V
AREF
3.0 Vdd
V
V
ASS
Analog reference voltage
V
AREF
- V
ASS
≧
2.5V
Vss
V
VAI
Analog input voltage
V
ASS
V
AREF
V
IAI Analog
supply
current Vdd=V
AREF
=5.0V, V
ASS
=0.0V
500
700
1000
uA
RN Resolution Vdd=V
AREF
=5.0V, V
ASS
=0.0V
6
7
8
Bits
LN Linearity
error Vdd = 2.5 to 5.5V Ta=25℃
0 ±2 ±4
LSB
DNL
Differential nonlinear error
Vdd = 2.5 to 5.5V Ta=25℃
0 ±0.5
±0.9
LSB
FSE
Full scale error
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
±0
±2
±4
LSB
OE Offset
error Vdd=V
AREF
=5.0V, V
ASS
=0.0V
±0
±1
±2
LSB
ZAI
Recommended impedance of
analog voltage source
0
8
10
KΩ
TAD
A/D clock period
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
3
3.5
4
us
TCN
A/D conversion time
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
10
10
TAD
ADIV
A/D OP input voltage range
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
0
5
V
0 0.2 0.3
ADOV A/D OP output voltage swing
Vdd=V
AREF
=5.0V, V
ASS
=0.0V,RL=10KΩ
4.7 4.8 5
V
ADSR
A/D OP slew rate
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
0.1
0.3
V/us
PSR Power
Supply
Rejection
Vdd=5.0V±0.5V
±0
±2 LSB
Note: 1.These parameters are characterized but not tested.
2.These parameters are for design guidance only and are not tested.
3.It will not consume any current other than minor leakage current, when A/D is off.
4.The A/D conversion result never decrease with an increase in the input voltage, and has no
missing code.
5.Specifications subject to change without notice.
6.4 Comparator(OP) Characteristic
(Vdd = 5.0V,Vss=0V,Ta=0 to 70℃)
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
SR Slew
rate
0.1
0.2
V/us
This specification is subject to change without prior notice. 07.01.2003 (V1.3)
58