CXP-82220 datasheet(18/21 Pages) SONY

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CXP82220/82224

(3) A/D converter characteristics

VZT∗1

VFT∗2

tCONV

tSAMP

VREF

VIAN

IREF

IREFS

Ta = 25°C

VDD = AVDD = 5.0V

VDD = AVss = 0V

Operation mode

Sleep mode

Stop mode

32kHz operation mode

AVREF

–10

4930

160/fADC ∗3

12/fADC ∗3

VDD – 0.5

Item

Symbol

Condition

Min.

Typ.

Max.

Unit

Bits

Resolution

Linearity error

Zero transition voltage

Full-scale

transition voltage

Conversion time

Sampling time

Reference input voltage

Analog input voltage

AVREF current

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

±5

150

5120

VDD

AVREF

1.0

5050

0.6

LSB

µs

µA

Analog input

Linearity error

00H

01H

FEH

FFH

VZT

VFT

Fig. 6. Definitions of A/D converter terms

AVREF

AN0 to AN7

∗1 V

: Value at which the digital conversion value

changes from 00H to 01H and vice versa.

∗2 V

: Value at which the digital conversion value

changes from FEH to FFH and vice versa.

∗3 f

ADC

indicates the below values due to ADC operation

clock selection (ADCS: Bit 6 of address 00F9H).

During PS2 selection, fADC = fc/2

During PS1 selection, fADC = fc

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