MAX22707AUB+

MAX22707AUB+ is a low power, precision zero crossing detector. It features a low-power, precision analogue filter based on the switched capacitor technology designed for precision filtering of AC input noise. This device requires only a simple external input network preceding the AC inputs and no additional external components for the filters. It supports two basic input frequencies which depend on the filter type. If the band-pass is selected, the frequency selection mode control pin (MC) is used to choose between 50Hz and 60Hz. If the low-pass is selected, the same pin is used to choose between 50/60Hz and 100/120Hz signal band. To select between sine and rectified inputs, the rectified select pin (RS) is used. It is used in applications such as industrial lighting dimming, AC phase detection, flexible zero crossing detection.

• Precision zero crossing detection, no external precision filter capacitor required
• Integrated zero crossing detection with ±1%, high frequency noise filter
• 4th order low-pass filter (LPF), 4th order band-pass filter (BPF)
• Configurability for ease of use, user selectable filter configuration (LPF or BPF)
• Selectable input frequency, power saving stand-by mode
• Programmable DC averaging timer, saves PCB space and bill of materials (BOM) cost
• Positive supply voltage range from 3V to 5.5V
• Positive supply current is 1mA maximum at (EN = VCC, VCC = 5.0V and TA = +25°C)
• Upper passband frequency is 56Hz typ at (VCC = 5.0V and TA = +25°C)
• Operating temperature range from -40°C to +125°C, 10-pin MAX package

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