MB9B520M datasheet(80/108 Pages) CYPRESS

80 / 108 page

Document Number: 002-05649 Rev. *D

Page 80 of 108

MB9B520M Series

12.5 12-bit A/D Converter

Electrical characteristics for the A/D converter

(VCC = AVCC = 2.7V to 5.5V, VSS = AVSS = AVRL = 0V, TA = - 40°C to + 105°C)

Parameter

Symbol

name

Value

Unit

Remarks

Min

Typ

Max

Resolution

bit

Integral Nonlinearity

± 1.5

± 4.5

LSB

AVRH = 2.7 V to 5.5 V

Differential Nonlinearity

± 1.7

± 2.5

LSB

Zero transition voltage

VZT

ANxx

± 10

± 15

Full-scale transition voltage

VFST

ANxx

AVRH ± 5

AVRH ± 15

Conversion time

0.8*1

μs

AVCC

≥ 4.5 V

1.0*1

AVCC < 4.5 V

Sampling time*2

0.24

μs

AVCC

≥ 4.5 V

0.3

AVCC < 4.5 V

Compare clock cycle*3

tCCK

1000

AVCC

≥ 4.5 V

AVCC < 4.5 V

State transition time to operation

permission

tSTT

1.0

μs

Analog input capacity

CAIN

9.7

Analog input resistor

RAIN

1.7

kΩ

AVCC ≥ 4.5 V

2.4

AVCC < 4.5 V

Interchannel disparity

LSB

Analog port input leak current

ANxx

μA

Analog input voltage

ANxx

AVRL

AVRH

Reference voltage

AVRH

2.7

AVCC

AVRL

AVSS

*1: The conversion time is the value of sampling time (tS) + compare time (tC).

The condition of the minimum conversion time is the following.

AVCC

≥ 4.5 V, HCLK=50 MHz

sampling time: 240 ns, compare time: 560 ns

AVCC < 4.5 V, HCLK=40 MHz

sampling time: 300 ns, compare time: 700 ns

Ensure that it satisfies the value of the sampling time (tS) and compare clock cycle (tCCK).

For setting of the sampling time and compare clock cycle, see "Chapter 1-1: A/D Converter" in

“FM3 Family Peripheral Manual

Analog Macro Part

”.

The register settings of the A/D Converter are reflected in the operation according to the APB bus clock timing.

For the number of the APB bus to which the A/D Converter is connected, see "Block Diagram".

The base clock (HCLK) is used to generate the sampling time and the compare clock cycle.

*2: A necessary sampling time changes by external impedance.

Ensure that it sets the sampling time to satisfy (Equation 1).

*3: The compare time (tC) is the value of (Equation 2).

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