CXP845F60 Datasheet, PDF (17/23 Pages) Sony Corporation – CMOS 8-bit Single Chip Microcomputer

CXP845F60
(4) A/D converter characteristics (Ta = –20 to +75°C, VDD = 4.5 to 5.5V, AVREF = 4.0 to VDD, Vss = AVSS = 0V reference)
Item
Resolution
Symbol Pin
Conditions
Min.
Linearity error
Zero transition voltage
VZT^∗1
Full-scale transition
voltage
Conversion time
Sampling time
VFT^∗2
tCONV
tSAMP
Ta = 25°C
VDD = AVREF = 5.0V
VSS = AVSS = 0V
–10
4910
27/fADC^∗3
6/fADC^∗3
Reference input voltage VREF
Analog input voltage
VIAN
AVREF
AN0 to AN7
VDD – 0.5
0
AVREF current
IREF
IREFS
AVREF
Operation mode
Sleep mode
Stop mode
Typ.
10
4970
0.6
Max.
8
±4
Unit
Bits
LSB
70 mV
5030 mV
µs
µs
VDD
V
AVREF V
1.0 mA
10
µA
FFh
FEh
01h
00h
VZT
Linearity error
∗1 _{VZT: Value at which the digital conversion value changes}
from 00H to 01H and vice versa.
∗2 _{VFT: Value at which the digital conversion value changes}
from FEH to FFH and vice versa.
∗3 _{fADC indicates the values below due to the contents of bit 6}
(CKS) of the A/D control register (ADC: 00F9H).
fADC = fc (CKS = "0"), fc/2 (CKS = "1")
However, the selection for fADC = fc (CKS = "0") is limited in
the clock range of fc = 1 to 14MHz (VDD = 4.5 to 5.5V).
Analog input
VFT
Fig. 6. Definition of A/D converter terms
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