AS1528/AS1529
Datasheet - Electrical Characteristics
Timing Characteristics
VDD = +2.7 to +5.25V, VREF = +2.5V, 4.7µF Capacitor at REF; fSCLK = 8MHz (50% Duty Cycle); AIN- = GND (AS1528)
TAMB = TMIN to TMAX (unless otherwise specified). Typical Values at TAMB = +25ºC.
Table 5. Timing Characteristics
Parameter
Symbol
tCH
Conditions
Min
38
Typ
Max
Units
ns
SCLK Pulse Width High
SCLK Pulse Width Low
tCL
38
ns
CLOAD = 30pF (see Figure 3, Figure 4,
Figure 18 on page 11, Figure 19 on
page 11)
SCLK Falling-to-DOUT
Transition
tDOT
tDOD
28
200
3.3
60
500
3.7
ns
ns
CLOAD = 30pF (see Figure 3, Figure 4,
Figure 18 on page 11, Figure 19 on
page 11)
SCLK Rising-to-DOUT1
Disable
100
30
CLOAD = 30pF (see Figure 3, Figure 4,
Figure 18 on page 11, Figure 19 on
page 11)
CNVST Falling-to-MSB Vlid
CNVST Pulse Width
tCONV
tCSW
µs
ns
1. Guaranteed by Design and Characterisation.
Figure 3. DOUT Enable/Disable Time Load Circuits
DOUT
VDD
6kΩ
6kΩ
CLOAD
DOUT
GND
GND
CLOAD
High-impedance to VOH, VOL to VOH, and VOH to High-impedance
GND
Figure 4. Detailed Serial Interface Timing Diagram
CNVST
tCH
tCSW
tCL
SCLK
DOUT
tDOT
tDOD
High Z
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