CXA2610N Ver la hoja de datos (PDF) - Sony Semiconductor

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componentes Descripción

Fabricante

CXA2610N

Laser Driver

Sony Semiconductor 

CXA2610N

Description of Functions

(1) LD drive current value setting

The current controlled by the current setting pins IINR, IIN2 and IIN3 is output from the LD0 pin.

The current flowing to the LD0 pin can be set independently for IINR, IIN2 and IIN3 by CONTR, CONT2 and

CONT3.

(2) LD drive current forced OFF

Forced OFF is enabled by setting the ENABLE pin Low.

(3) Oscillation circuit

The oscillation circuit is turned ON forcibly by setting the OSCENA pin Low.

(OSCENA × CONTR × (CONT2 + CONT3))

The oscillation circuit is turned ON by setting the OSCENA pin High only for read.

(OSCENA × CONTR × CONT2 × CONT3)

(4) Oscillation frequency adjustment

The oscillation frequency can be varied by the external resistance value connected to the OSCFR pin.

(5) Oscillation level adjustment

The oscillation level initial value can be set by the external resistance value connected to the OSCGA pin.

The oscillation level can be adjusted by varying the IINR input current value.

In addition, the read block DC compensation current IR that flows when oscillation is OFF is independent of

the OSCGA pin external resistance value, and is constant.

Oscillator OFF

Initial setting

Level adjustment

For large OSCGA

external resistance

(Io ≈ 0mA)

For small OSCGA

external resistance

2IR

IO + 2 (IR – IO)

IR

IO

0

IINR input current [µA]

12

2k

OSCGA external resistance [Ω]

IO

IR < IO

IR > IO

IINR input current [µA]

OSCGA pin voltage

40

IO ≈

×

[mAp-p]

OSCGA external resistance 9

(6) Logic

The logic table for the CONTR, CONT2, CONT3 and ENABLE pins is shown below.

Be sure to also check the timing chart on page 7.

ENABLE

L

H

H

H

H

H

CONTR

X

H

L

L

L

L

CONT2

X

H

H

L

H

L

CONT3

LD0

X

OFF

H

OFF

H

IINR

H

IINR + IIN2

L

IINR + IIN3

L

IINR + IIN2 + IIN3

–5–

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