AS1122
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Timing Characteristics
V
DD
= +2.7V to +3.6V, T
AMB
= -40°C to +85ºC. Typical values are at T
AMB
= +25°C, V
DD
= 3.3V (unless otherwise specified).
Table 4. Output Timing Characteristics
Symbol
t
R_OUT
t
F_OUT
t
D
2
Parameter
Rise Time OUT
Fall Time OUT
1
Conditions
Min
Typ
20
20
25
Max
Unit
ns
Average Output Delay Time
(can be turned off on request)
Interface Characteristics
Table 5. Serial Interface Timing Characteristics
Symbol
f
OSC
f
CLK
t
LOW
Parameter
hn
ic a
al m
co s
A
nt G
en
ts
til
Conditions
Min
8
Typ
10
Max
12
5
Oscillator Frequency
Data Shift Clock Frequency
1
1
V
DD
= +2.7V to +3.6V, T
AMB
= -40°C to +85ºC. Typical values are at T
AMB
= +25°C, V
DD
= 3.3V (unless otherwise specified).
CLK low time during data shift
CLK low time for data capture
Setup Time
Hold Time
t
CAPT
1
1.5
12
t
SETUP
t
HOLD
2
SDI, CLKI
2
SDI, CLKI
12
2
t
PD_rising
2
Delay CLKI to CLKO
3
3
rising CLKI to rising CLKO
t
PD_falling
t
PD_SDO
t
H_CLKO
t
R_CLK
2
Delay CLKI to CLKO
Delay CLKO to SDO
High Time of CLKO
Rise Time CLK
3
rising CLKI to falling CLKO
falling edge CLKO
72
2
3
0.8
70
2
3
C
LOAD
= 20pF
C
LOAD
= 20pF
t
R_DATA
Rise Time Data
3
1. See
2. See
and
3. Guaranteed by design and not production tested.
Te
c
Figure 3. Load Circuit for Digital Output Timing Specifications
200µA
I
OL
SDO
CLKO
C
LOAD
20pF
200µA
I
OH
VDD/2
Revision 1.00
lv
Unit
MHz
MHz
s
s
ns
ns
ns
ns
ns
ns
ns
ns
1
1.8
2.85
3.5
8
103.5
1.5
138
3
100
130
10
10
5 - 22
1. Value can be factory trimmed for EMI improvement.
2. See
al
id
ns
1
ns
AMSCO [ AUSTRIAMICROSYSTEMS AG ]
