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MAX1932 - Digitally Controlled / 0.5% Accurate / Safest APD Bias Supply

General Description

The MAX1932 generates a low-noise, high-voltage output to bias avalanche photodiodes (APDs) in optical receivers.

Key Features

  • MAX1932 8-Bit SPI-Compatible DAC Compatible with External DAC 0.5% Accurate Output Low Ripple Output (< 1mV) o Small 12-Pin, 4mm ✕ 4mm Thin QFN Package Ordering Information PART MAX1932ETC TEMP RANGE PIN-.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-2555; Rev 1; 12/02 Digitally Controlled, 0.5% Accurate, Safest APD Bias Supply General Description The MAX1932 generates a low-noise, high-voltage output to bias avalanche photodiodes (APDs) in optical receivers. Very low output ripple and noise is achieved by a constant-frequency, pulse-width modulated (PWM) boost topology combined with a unique architecture that maintains regulation with an optional RC or LC post filter inside its feedback loop. A precision reference and error amplifier maintain 0.5% output voltage accuracy. The MAX1932 protects expensive APDs against adverse operating conditions while providing optimal bias.