cxa2610an Sony Electronics, cxa2610an Datasheet - Page 5

• Manufacturer Part Number: cxa2610an
• Description: Laser Driver
• Manufacturer: Sony Electronics

Description of Functions
(1) LD drive current value setting
(2) LD drive current forced OFF
(3) Oscillation circuit
(4) Oscillation frequency adjustment
(5) Oscillation level adjustment
(6) Logic
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.
Forced OFF is enabled by setting the ENABLE pin Low.
The oscillation circuit is turned ON forcibly by setting the OSCENA pin Low.
(OSCENA
The oscillation circuit is turned ON by setting the OSCENA pin High only for read.
(OSCENA
The oscillation frequency can be varied by the external resistance value connected to the OSCFR pin.
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 I
the OSCGA pin external resistance value, and is constant.
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.
0
ENABLE
H
H
H
H
H
L
IINR input current [ A]
Oscillator OFF
CONTR
CONTR
CONTR
X
H
L
L
L
L
(CONT2 + CONT3))
CONT2
CONT2
I
O
X
H
H
H
L
L
CONT3)
OSCGA external resistance
OSCGA external resistance [ ]
OSCGA pin voltage
12
CONT3
Initial setting
X
H
H
H
L
L
– 5 –
IINR + IIN2 + IIN3
R
2k
IINR + IIN2
IINR + IIN3
that flows when oscillation is OFF is independent of
OFF
OFF
IINR
LD0
40
9
I
[mAp-p]
O
For small OSCGA
external resistance
I
IINR input current [ A]
R
Level adjustment
For large OSCGA
external resistance
(Io
< I
O
0mA)
I
O
I
R
> I
O
2I
I
I
O
R
R
+ 2 (I
CXA2610AN
R
– I
O
)