isl58333

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DATASHEET
Wide Optical Spectrum Laser Power Monitor IC
ISL58333
Features
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.
• 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
The ISL58333 operates from a single +3.3V supply. It is
available in a space-saving 9-ball glass top BGA package.
• Optical Power Monitoring
Related Literature
• Laser Auto Power Control for Laser Based Application
• Laser Based Pico-Projectors or Projection TV
• White Balance for LED Based LCoS and DLP Pico Projectors
• See TB478 “PCB Assembly Guidelines for Shell-Op 3D
Package”
POWER CONVERTER
DIGITAL CIRCUITS
5.0V
3.3V
2.5V
1.8V
1.2V
ITO
DRIVER
LCOS
DRIVER
OEIC
ISL58333
OPTIC FEEDBACK
LCOS PANELS
VIDEO
FRONT END
&
VIDEO
PROCESSOR
MCU
LASER DIODE
DRIVER
DC/DC
LASER
DIODE
FIGURE 1. APPLICATIONS BLOCK DIAGRAM
October 13, 2011
FN7664.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL58333
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in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
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without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be
accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
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FN7664.1
October 13, 2011