ML610Q421 datasheet(33/37 Pages) LAPIS

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FEDL610Q421-03

ML610Q421/ML610Q422

AC CHARACTERISTICS (RC Oscillation A/D Converter)

(VDD = 1.3 to 3.6V, AVDD = 2.2 to 3.6V, VSS = AVSS = 0V, Ta = −20 to +70°C, Ta = −40 to +85°C for P version, unless

otherwise specified)

Parameter

Symbol

Condition

Rating

Unit

Min.

Typ.

Max.

Resistors for oscillation

RS0, RS1,

RT0,

RT0-1,RT1

CS0, CT0, CS1

≥ 740pF



Ω

Oscillation frequency

VDD = 1.5V

fOSC1

Resistor for oscillation = 1k

Ω

209.4

330.6

435.1

kHz

fOSC2

Resistor for oscillation = 10k

Ω

41.29

55.27

64.16

kHz

fOSC3

Resistor for oscillation = 100k

Ω

4.71

5.97

7.06

kHz

RS to RT oscillation frequency

ratio

VDD = 1.5V

Kf1

RT0, RT0-1, RT1 = 1kHz

5.567

5.982

6.225



Kf2

RT0, RT0-1, RT1 = 10kHz

0.99

1.01



Kf3

RT0, RT0-1, RT1 = 100kHz

0.104

0.108

0.118



Oscillation frequency

VDD = 3.0V

fOSC1

Resistor for oscillation = 1k

Ω

407.3

486.7

594.6

kHz

fOSC2

Resistor for oscillation = 10k

Ω

49.76

59.28

72.76

kHz

fOSC3

Resistor for oscillation = 100k

Ω

5.04

5.993

7.04

kHz

RS to RT oscillation frequency

ratio

VDD = 3.0V

Kf1

RT0, RT0-1, RT1 = 1kHz

8.006

8.210

8.416



Kf2

RT0, RT0-1, RT1 = 10kHz

0.99

1.01



Kf3

RT0, RT0-1, RT1 = 100kHz

0.100

0.108

0.115



1: Kfx is the ratio of the oscillation frequency by the sensor resistor to the oscillation frequency by the reference resistor on the

same conditions.

Kfx =

fOSCX(RT0−CS0 oscillation)

fOSCX(RT0-1−CS0 oscillation)

fOSCX(RT1−CS1 oscillation)

fOSCX(RS0−CS0 oscillation)

fOSCX(RS1−CS1 oscillation)

(x = 1, 2, 3)

Note:

- Please have the shortest layout for the common node (wiring patterns which are connected to the external capacitors, resistors

and IN0/IN1 pin), including CVR0/CVR1. Especially, do not have long wire between IN0/IN1 and RS0/RS1. The coupling

capacitance on the wires may occur incorrect A/D conversion. Also, please do not have signals which may be a source of noise

around the node.

- When RT0/RT1 (Thermistor and etc.) requires long wiring due to the restricted placement, please have VSS(GND) trace next to

the signal.

- Please make wiring to components (capacitor, resisteor and etc.) necessory for objective measurement. Wiring to reserved

components may affect to the A/D conversion operation by noise the components itself may have.

VDD

AVDD VREF

VDDL

VDDX

CL1 CL0 CX

VSS AVSS

RT0, RT0-1, RT1: 1k

Ω /10kΩ/100kΩ

RS0, RS1: 10k

Ω

CS0, CT0, CS1: 560pF

CVR0, CVR1: 820pF

RCM

Frequency measurement

(fOSCX)

VIH

VIL

*1: Input logic circuit to

determine the specified

measuring conditions.

(*1)

CS0

RT0

IN1 CS1 RS1 RT1

RS0

RCT0

IN0

CVR0

CVR1

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