ADNV-6330 datasheet(7/45 Pages) HP

Numer części	ADNV-6330

Szczegółowy opis	Low Power Laser Mouse Bundles

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Producent	HP [Agilent(Hewlett-Packard)]

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7

LASER Drive Mode

The laser is driven in pulsed

mode during normal operation.

A calibration mode is provided

which drives the laser in

continuous (CW) operation.

Eye Safety

The ADNS-6030 and the

associated components in the

schematic of Figure 5 are

intended to comply with Class

1 Eye Safety Requirements of

IEC 60825-1. Agilent

Technologies suggests that

manufacturers perform testing

to verify eye safety on each

mouse. It is also recommended

to review possible single fault

mechanisms beyond those

described below in the section

“Single Fault Detection”. Under

normal conditions, the ADNS-

6030 generates the drive

current for the laser diode

(ADNV-6330).

In order to stay below the

Class 1 power requirements,

LASER_CTRL0 (register 0x1a),

LASER_CTRL1 (register 0x1f),

LSRPWR_CFG0 (register 0x1c)

and LSRPWR_CFG1 (register

0x1d) must be programmed to

appropriate values. The system

comprised of the ADNS-6030

and ADNV-6330, is designed to

maintain the output beam

power within Class 1

requirements over components

manufacturing tolerances and

the recommended temperature

range when adjusted per the

procedure below and

implemented as shown in the

recommended application

circuit of Figure 5. For more

information, please refer to

Agilent ADNB-6031 and

ADNB-6032 Laser Mouse

Sensor Eye Safety Application

Note AN 5230.

LASER Power Adjustment Procedure

1. The ambient temperature

should be 25C +/- 5C.

2. Set VDD to its permanent

value.

3. Set the Range bit (bit 7 of

register 0x1a) to 0.

4. Set the Range_C complement

bit (bit 7 of register 0x1f) to

1.

5. Set the Match_bit (bit 5 of

register 0x1a) to the correct

value for the bin designation

of the laser being used.

6. Set the Match_C_bit (bit 5

of register 0x1f) to the

complement of the

Match_bit.

7. Enable the Calibration mode

by writing to bits [3,2,1] of

register 0x1A so the laser

will be driven with 100%

duty cycle.

8. Write the Calibration mode

complement bits to register

0x1f.

9. Set the laser current to the

minimum value by writing

0x00 to register 0x1c, and

the complementary value

0xFF to register 0x1d.

10. Program registers 0x1c and

0x1d with increasing values

to achieve an output power

as close to 506uW as

possible without exceeding

it. If this power is obtained,

the calibration is complete,

skip to step 14.

11. If it was not possible to

achieve the power target, set

the laser current to the

minimum value by writing

0x00 to register 0x1c, and

the complementary value

0xff to register 0x1d.

12. Set the Range and Range_C

bits in registers 0x1a and

0x1f, respectively, to choose

to the higher laser current

range.

13. Program registers 0x1c and

0x1d with increasing values

to achieve an output power

as close to 506uW as

possible without exceeding

it.

14. Save the value of registers

0x1a, 0x1c, 0x1d, and 0x1f

in non-volatile memory in

the mouse. These registers

must be restored to these

values every time the

ADNS-6030 is reset.

15. Reset the mouse, reload

the register values from

non-volatile memory, enable

Calibration mode, and

measure the laser power to

verify that the calibration is

correct.

Good engineering practices

such as regular power meter

calibration, random quality

assurance retest of calibrated

mice, etc. should be used to

guarantee performance,

reliability and safety for the

product design.

Podobny numer części - ADNV-6330

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ADNV-6330 Arkusz danych(PDF) 7 Page - Agilent(Hewlett-Packard)

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