Maxim Intros New MAX1932 Avalanche Photodiode
Maxim Integrated Products Inc. (Sunnyvale, CA) announced its new MAX1932 avalanche photodiode bias supply, which protects photodiode devices during avalanche breakdown through accurate, high-side current sensing, and improves the reliability of optical networks and modules.
The 4mm x 4mm, 12-pin, QFN device employs a constant-frequency, voltage-mode, pulse-width-modulated scheme to generate a low-noise output. Output ripple can be reduced to <1mW by an optional in-loop RC or LC post-filtering circuit without sacrificing output accuracy. The output voltage can be set from 4.5V to 90V while operating from a 3.3V or 5V input bus. The device also integrates a high-accuracy reference and precision-error amplifier. An output-voltage accuracy of 0.6 percent can be achieved over the 0 to 85 degrees C temperature range. The output voltage can be set through a conventional resistive-feedback divider; an internal eight-bit, SPI-compatible, digital-to-analog (D/A) converter, or an external D/A converter.
