M62301SP datasheet(4/9 Pages) MITSUBISHI

Part #	M62301SP

Description	10~12-BIT 4CH INTEGRATING A-D CONVERTER

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

Direct Link	http://www.mitsubishichips.com

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ELECTRIC

MITSUBISHI

M62301SP,FP

MITSUBISHI<Dig.Ana.INTERFACE>

10~12-BIT 4CH INTEGRATING A-D CONVERTER

4

OPERATING DESCRIPTION

(1)Decoder

Based on digital inputs to C0,C1,C2,the analog switch

is set to on,and the input of "0" scale (GND input),input

of reference scale (reference voltage input),input to

A1~A4,or discharge

from integration capacitor (CI) is performed.None of these operations

is performed when the "mode 8" input is given:

Mode

1

2

3

4

5

6

7

8

C0

C1

C2

0

Discharge

1

0

GND

0

1

0

1

0

1

0

1

0

1

VREF

A1

A2

A3

A4

(2)A-D conversion

Multiplexer first selects VGND,obtaining minimum pulse

TGND.It then selects VREF,obtaining reference pulse

TREF.Input is selected next,obtaining input pulse TIN.VIN is

obtained by deducting TGND,as the offset,from TREF and

TIN.

Note. To ensure discharge from capacitor CI,the decoder input as in

the above diagram should stay in mode 1 at least for the

period calculated above:Tdi=(CI X

1mA

VIAmax+0.49

)

It is not necessary to measure TGND,and TREF for each

channel.

VIN=VREF •

TREF-TG

TIN-TG

By measuring voltage at the maximum input for

approximately 500µs under the counter clock of

8MHz,resolution of approximately 12bits can be obtained;

500µs

125ns

.

=. 2

12

DECODER SELECTION MODE

1

2

3

1

4 ~ 7

1

VIN+0.49V

VREF+0.49V

0.49V

0.36V

TGND

TREF

TIN

V 8

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M62301SP Datasheet(PDF) 4 Page - Mitsubishi Electric Semiconductor

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