ISL58781 Datasheet, PDF (3/15 Pages) Intersil Corporation – Laser Diode Driver with Serial Control and Write Current DAC

ISL58781
Ordering Information
Pin Configuration
PART
NUMBER
PART
MARKING
TEMP
RANGE
(°C)
PACKAGE PKG.
(Pb-free) DWG.#
ISL58781
(28 LD QFN)
TOP VIEW
ISL58781CRZ-T13 58781 CRZ -10 to +85 28 Ld QFN L28.4x5A
(Notes 1, 2, 3)
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die
attach materials, and 100% matte tin plate plus anneal (e3
termination finish, which is RoHS compliant and compatible
with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements
of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device
information page for ISL58781. For more information on
MSL please see techbrief TB363.
WEN0 1
WEN0B 2
WEN1 3
WEN1B 4
WEN2 5
WEN2B 6
OSCEN 7
OSCENB 8
THERMAL
PAD
22 VSO
21 IOUT1
20 GND
19 VSO
18 IOUT2
17 IOUT2
16 VSO
15 ENA
Pin Descriptions
PIN
PIN
PIN
NAME NUMBER I/O TYPE
PIN DESCRIPTION
WEN0,
WEN0B
1, 2
I LVDS Write Enable 0. When WEN0 > WEN0B, the result is a logic 1 in the write current selection.
Otherwise it is logic 0.
WEN1,
WEN1B
3, 4
I LVDS Write Enable 1. When WEN1 > WEN1B, the result is a logic 1 in the write current selection.
Otherwise it is logic 0.
WEN2,
WEN2B
5, 6
I LVDS Write Enable 2. When WEN2 > WEN2B, the result is a logic 1 in the write current selection.
Otherwise it is logic 0.
OSCEN,
OSCENB
7, 8
I LVDS Oscillator Enable. When OSCEN > OSCENB, the result is a logic 1, which may be used to
turn on the oscillator. When 0, the oscillator will output a DC current that is programmable.
BSEL
9
I Digital Bank Select input selects the write current register banks.
RFREQ
10
I/O Analog A resistor from RFREQ to GND sets the range of the HFM frequency.
IAPC
11
I Analog A 1k impedance current input; 100*IAPC flow to the output. This controls the read
current, which may also include a current from an internal DAC.
VSL
12
O Power The internal 2.5V regulator needs a 1µF capacitor from VSL to GND. Do not use VSL for
other loads.
GND
13, 20
Ground Ground
RSET
14
I/O Analog A resistor from RSET to analog ground calibrates the DAC full-scales
ENA
15
I Digital Chip enable input (H = enable, L = disable)
VSO 16, 19, 22
Power Supply voltage for the output drivers only (connect all pins)
IOUT2 17, 18 O Analog Laser diode output #2
IOUT1
21
O Analog Laser diode output #1
IBLUE
23
O Analog Blue laser diode output
SEN
25
I Digital Serial control enable (H = enable, L = disable)
SDIO
26
I/O Digital Serial data for parameters and control; in/out
SCLK
27
I Digital Serial control clock
WEB
28
I Digital Write enable Bar. When low, write current is enabled.
PD
Thermal The Thermal pad should be grounded and connected to a heat sink.
NOTE: Pins with the same name are internally connected together; however, LDD pins must not be used for connecting together
external components or features.
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FN6909.3
December 3, 2015