CXP83408 Datasheet, PDF (20/24 Pages) Sony Corporation – CMOS 8-bit Single Chip Microcomputer

CXP83408/83412/83416, CXP83409/83413/83417
(3) A/D converter characteristics
(Ta = –20 to +75°C, VDD = 4.5 to 5.5V, AVREF = 4.0 to AVDD, Vss = 0V reference)
Item
Symbol Pin
Conditions
Resolution
Linearity error
Zero transition voltage VZT^∗1
Full-scale transition
voltage
VFT^∗2
Ta = 25°C
VDD = 5.0V
VSS = 0V
Conversion time
Sampling time
tCONV
tSAMP
Analog input voltage VIAN AN0 to AN7
Min.
Typ.
Max. Unit
8
Bits
±3
LSB
–10
10
70
mV
4910
160/fADC^∗3
12/fADC^∗3
0
4970
5030 mV
µs
µs
VDD + 0.3 V
Fig. 5. Definition of A/D converter terms
FFH
FEH
01H
00H
VZT
Linearity error
VFT
Analog input
∗1 _{VZT: Value atwhich 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 below values due to the contents of bit 6}
(CK3) of the A/D control registor (ADC: 00F9H) and bit 7
(PCK1) and bit 6 (PCK0) of the clock control resistor (CLC:
00FEH).
CKS _{0 (φ/2 selection)}
PCK1, PCK0
00 (φ = fEX/2)
fADC = fc/2
01 (φ = fEX/4)
fADC = fc/4
11 (φ = fEX/16) fADC = fc/16
0 (φ selection)
fADC = fc
fADC = fc/2
fADC = fc/8
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