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ISL58781 Datasheet, PDF (9/15 Pages) Intersil Corporation – Laser Diode Driver with Serial Control and Write Current DAC
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ISL58781
Laser Driver AC Performance
Demoboard test, 10% duty cycle pulse, load = equivalent circuitry to [laser + flex
cable] and/or as noted. VSO = 5V. TA = +25°C
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX UNIT
tR-IOUTx
tF-IOUTx
O/S-IOUTx
tD-IOUTx
tR-BLUE
tF-BLUE
O/S-BLUE
tD-BLUE
INOISE-IOUTx
INOISE-IOUTx
IOUT1/2 Write Rise Time (10% to 90%) 300mW Optical ML229U7 (Note 23)
IOUT1/2 Write Fall Time (10% to 90%) 300mW Optical ML229U7 (Note 23)
IOUT1/2 Write Pulse Overshoot
300mW Optical ML229U7 (Note 23)
IOUT1/2 Write Pulse Delay From
(Note 23)
LVDS = Zero crossing to IOUT rise 10%
IBLUE Write Rise Time (10% to 90%) 250mW Optical (Note 23)
IBLUE Write Fall Time (10% to 90%) 250mW Optical (Note 23)
IBLUE Write Pulse Overshoot
250mW Rising Optical (Note 23)
IBLUE Write Pulse Delay From
(Note 23)
LVDS = Zero crossing to IOUT rise 10%
IOUT1/2 Read Output Current Noise
IOUT = 50mA, measured @ 10MHz
IOUT1/2 Read & HFM Output Current
Noise
IOUT = 50mA+30mAP-P;
Measured @ 10MHz
1.3
800
11
5.3
600
450
6
5.2
0.55
0.96
ns
ps
%
ns
ps
ps
%
ns
nA/Hz
nA/Hz
INOISE-BLUE
INOISE-BLUE
IBLUE Read Output Current Noise
IOUT = 50mA, measured @ 10MHz
IBLUE Read & HFM Output Current Noise IOUT = 50mA+10mAP-P;
Measured @ 10MHz
0.37
0.47
nA/Hz
nA/Hz
BWAPC
Read Amplifier 3dB Bandwidth
IOUT = 50mA
NOTE:
23. Limits established by characterization and are not production tested
0.5
MHz
TABLE 1. AMPLITUDE SELECTION REGISTER ACTIVATION
NAME
ENA
WEB
CR0
Bit 2
WEN2 WEN1 WEN0
MSB
BSEL = 0
LSB
BSEL = 0
MSB
BSEL = 1
LSB
BSEL = 1
OFF
0
X
x
X
X
X
X
X
X
X
READ
1
1
0
X
X
X
0-19
1-09
0-19
1-09
W0
1
0
1
0
0
0
0-10
2-10
0-11
2-11
W1
1
0
1
0
0
1
0-04
2-04
0-05
2-05
W2
1
0
1
0
1
0
0-06
2-06
0-07
2-07
W3
1
0
1
0
1
1
0-08
2-08
0-09
2-09
W4
1
0
1
1
0
0
0-0A
2-0A
0-0B
2-0B
W5
1
0
1
1
0
1
0-0C
2-0C
0-0D
2-0D
W6
1
0
1
1
1
0
0-0E
2-0E
0-0F
2-0F
W7
1
0
1
1
1
1
0-12
2-12
0-13
2-13
NOTES:
24. There are two sets of write current registers. When BSEL = 1, bank 1 is selected. When BSEL = 0, bank 0 is selected.
25. Read and write are independent. Read is enabled with a control bit.
26. Register terminology is page Number-Register number (hex). Thus 1-09 is page 1, register 09h
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FN6909.3
December 3, 2015
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