AK9231 Datasheet, PDF (7/11 Pages) Asahi Kasei Microsystems – Dual 12-Bit 1MSPS SAR A/D Converter

[AK9231]
8. DC Characteristics
(Ta= -40 ~ 105ºC)
Parameter
Symbol
Min.
Max.
Unit
High-Level Input Voltage
VDD= 2.35 ~ 3.6V
VDD= 4.75 ~ 5.25V
VIH1
1.8
VIH2
2.4
-
-
V
V
Low-Level Input Voltage
VDD= 5V
VDD= 3V
VIL1
-
0.8
V
VIL2
-
0.4
V
High-Level Output Voltage (Iout = -200µA)
VOH VDD-0.2
-
V
Low-Level Output Voltage (Iout = 200µA)
VOL
-
0.4
V
Load Capacitance
CL
30
pF
Input Leakage Current
(* 3)
Iin
-
±1
µA
Note:
* 3. Except TEST0, TEST1, TEST2 and TEST3 pins. These pins are internally pulled-down. (Typ.50kΩ)
9. Switching Characteristics
(Ta= -40 ~ 105ºC)
Parameter
Symbol
Min.
Typ.
SCK Clock Frequency
fSCK
SCK High Pulse Width
(* 4)
tSCKH 0.4 x tSCK
SCK Low Pulse Width
(* 4)
tSCKL 0.4 x tSCK
Minimum time from bus 3-state to start of next conversion tq
40
CSN “↓” to First SCK “↓”
tCSS
10
CSN “↓” to DOUT “0” Delay
tCSD
-
SCK “↓” to DOUT Valid Delay
tDCD
-
SCK “↓” to DOUT Valid
VDD= 3V
tDCH1
7
Hold time
VDD= 5V
tDCH2
5.5
Minimum CS pulse
tCS
25
16th SCK“↓” to SDO Hi-Z State
VDD= 3V
VDD= 5V
tCCZ1
-
tCCZ2
-
Note:
* 4. tSCK = 1/ fSCK
Max.
20
-
-
-
25
30
-
-
30
20
Unit
MHz
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
9.1. Timing Diagram
1/ throughput
CSN
SCK
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
tCS
SDO
D11
0
D0
Hi-Z
tq
Figure 2. Data Output Timing 1
014010771-E-00
-7-
2014/12