CXP82952 View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

View to exact match

CXP82952

CMOS 8-bit Single Chip Microcomputer

Sony Semiconductor 

CXP82940/82948/82952/82960

(3) A/D converter characteristics

(Ta = –20 to +75°C, VDD = 4.5 to 5.5V, AVREF = 4.0 to AVDD, Vss = AVSS = 0V reference)

Item

Resolution

Linearity error

Zero transition

voltage

Full-scale

transition voltage

Conversion time

Sampling time

Reference input voltage

Analog input voltage

AVREF current

Symbol Pin

Condition

Min.

VZT∗1

VFT∗2

Ta = 25°C

VDD = AVDD = AVREF = 5.0V

VSS = AVSS = 0V

–10

4910

tCONV

tSAMP

VREF

VIAN

IREF

IREFS

160/fADC∗3

12/fADC∗3

AVREF

VDD = AVDD = 4.5 to 5.5V AVDD – 0.5

AN0 to AN7

0

Operation mode

AVREF

SLEEP mode

STOP mode

32kHz operation mode

Typ. Max. Unit

8 Bits

±3 LSB

10 70 mV

4970 5030 mV

µs

µs

AVDD V

AVREF V

0.6 1.0 mA

10 µA

Fig. 7. Definition of A/D converter terms

FFH

FEH

01H

00H

VZT

Linearity error

∗1 VZT: Value at which the digital conversion value change

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

(CKS) of the A/D control register (address: 00F9H) and bits 7

(PCK1) and 6 (PCK0) of the clock control register (address:

00FEH).

VFT

Analog input

CKS

PCK1, PCK0

00 (φ = fEX/2)

01 (φ = fEX/4)

11 (φ = fEX/16)

0 (φ /2 selection) 1 (φ selection)

fADC = fC/2

fADC = fC/4

fADC = fC/16

fADC = fC

fADC = fC/2

fADC = fC/8

– 19 –

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