AK5483 Datasheet, PDF (6/14 Pages) Asahi Kasei Microsystems – 10Bit 20MHz 3CH A/D Converter

ASAHI KASEI
[AK5483]
Recommended Operating Conditions
1.Power Supply Requirements
(DVSS,AVSS=0V,(#1))
Parameter
Supply Voltage [Analog]
[Digital]
Symbol
AVDD
DVDD
Condition
(#2)
min
typ
max
3.0
3.3 3.6
3.0
3.3 AVDD
(#1) All voltages are with respect to GND
(#2) At start-up , power-on AVDD before(or at the same time to) DVDD
power-on.
Units
V
V
2.Reference Input
Applicable Voltage to Top/Bottom Reference Voltage(TOP,BOTTOM is proportional to
Power Supply Voltage[AVDD].
The Analog Input Range[Conversion D-range] is determined based on TOP & BOTTOM
Voltage [which is applied to VTP/VBT pins] . Note that the AINFS[Analog Input Range]
must satisfy the following range.
Parameter
Analog Input Range
Symbol Conditions
AINFS
#1
SPE
C
min.
typ.
max.
Values
VDD/3 - VDD/30
VDD/3
VDD/3 + VDD/30
Reference Bottom
Voltage
VBTE
#2
min. 1.3 * VDD/3 - VDD/30
typ. 1.3 * VDD/3
max. 1.3 * VDD/3 + VDD/30
Reference Top
Voltage
VTPE
#2
min. 2.3 * VDD/3 - VDD/30
typ. 2.3 * VDD/3
max 2.3 * VDD/3 + VDD/30
Reference Input
ZTBE
Impedance
VBT
-VTP
min.
typ. 100
(#1) : AINFS=VTPE - VBTE
Note that AFINFS is not the ADC operating input voltage range
(Analog Characteristics are not always guaranteed.)
(#2) : Adjust both of these voltages[VBTE/VTPE] to satisfy the AINFS
spec. regarding the voltage difference VTPE-VBTE.
(Notice : Acceptable external VREF voltage varies according to the
Power Supply Voltage[AVDD].
Example : In case of VDD=AVDD=DVDD=3.0V
VBTE=1.20...1.398V VTPE=2.199...2.397V
AINFS= 0.9 .... 1.08 Vpp
Unit
Vpp
V
V
KOHM
M0035-E-01
-6-
1999/03