The ISL58327 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
ISL58327 has two banks of three sets of gain registers. For a
Pico-Projector application, the two banks of gain registers can be
used to monitor the 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 ISL58327 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 ISL58327 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 ISL58327 operates from a single +5V supply. It is available
in a space-saving 9-ball glass top BGA 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) (3mmx3mm)
• 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