ISL58333_1110 Datasheet, PDF (1/2 Pages) Intersil Corporation – Wide Optical Spectrum Laser Power Monitor IC

Wide Optical Spectrum Laser Power Monitor IC
ISL58333
The ISL58333 photo sensor IC has a wide optical spectral
sensitivity from 400nm to 1000nm. It is good for multiple light
source applications, such as laser based projectors. The
ISL58333 has two banks of three sets of gain registers. For a
Pico-Projector application, the two banks of gain resistors can be
used to monitor bias level and peak level of each wavelength.
Bank switching is done by applying a TTL compatible logic signal
to the HL pin. The three sets of gain registers can be used to
adjust optical-to-electrical conversion gain for each RED, GREEN,
and BLUE laser or any wavelength in a spectral range for
application. The ISL58333 is a single die device that has a photo
detector of 0.7mm diameter in the center of the die. The photo
current signal is amplified through the TIA, fine gain amplifier,
and the output drivers to convert from current to voltage. The
output of ISL58333 can be configured to be either differential or
single-ended. Gain changing according to each wavelength is
done through the I²C serial interface. Registers can be updated
in real time while the device is in operation.
The ISL58333 operates from a single +3.3V supply. It is available
in a space-saving 9-ball glass top BGA package.
Related Literature
• See TB478 “PCB Assembly Guidelines for Shell-Op 3D Package”
Features
• High Sensitivity from 400nm to 1000nm with Patented
Technology for Improved Blue Photo Response
• Differential Voltage Output or Single-Ended Output
• Internal Output Reference or External Output Reference
• Serial Interface for Gain Calibration
• Fast Settling Time < 20ns
• Wide Signal Bandwidth > 80MHz
• Wide Signal Gain Dynamic Range > 20dB
• Low Power Consumption
• Low Output Offset < 50mV
• Small 9-Ball Optical Chip Scale Package (OCSP)
(2.2mmx2.2mm)
• I²C Serial Interface
Applications
• Optical Power Monitoring
• Laser Based Pico-Projectors or Projection TV
• Laser Auto Power Control for Laser Based Application
• White Balance for LED Based LCoS and DLP Pico Projectors
Get Full Datasheet
POWER CONVERTER
DIGITAL CIRCUITS
VIDEO
FRONT END
&
VIDEO
PROCESSOR
LCOS
DRIVER
ITO
DRIVER
OEIC
ISL58333
OPTIC FEEDBACK
MCU
LASER DIODE
DRIVER
DC/DC
LASER
DIODE
October 13, 2011
FN7664.1
FIGURE 1. APPLICATIONS BLOCK DIAGRAM
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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