MAX22707
Low Power, Precision Zero Crossing Detector
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Low Power, Integrated Zero Crossing Detector with ±1% Accuracy
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Features
- Precision Zero Crossing Detection
- Integrated Zero Crossing Detection with ±1% Accuracy
- 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
- No External Precision Filter Capacitor Required
- 10-Pin µMAX package 3mm x 3mm
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The MAX22707 precision zero crossing detector provides a reliable and repeatable zero crossing detection signal based on an AC line input. The use of switched-capacitor filters helps to ensure minimal zero-crossing delay while tracking change in the input frequency and provides higher precision and a more inherently stable output than discrete solutions.
The MAX22707 features a low-power, precision analog filter based on the switched-capacitor technology designed for precision filtering of AC input noise. The device requires only a simple external input network preceding the AC inputs and no additional external components for the filters. The two different filter types can be selected by the Filter Selection pin (FS). The available filter types are the fourth order BPF and LPF. The DC averaging filter capacitor function is used for the latter.
The MAX22707 supports two standard line frequencies (50Hz and 60Hz) for both the filter types as well as rectified inputs in the case of LPF. If the BPF is selected, then the frequency selection Mode Control pin (MC) is used to select between 50Hz and 60Hz. If the LPF is selected, then the same pin is used to choose between 50/60Hz or 100/120Hz signal band (see Table 1). The Rectified Select pin (RS) is used to select between sine and rectified units (see Table 2). The MAX22707 is available in a compact 10-pin μMAX package and operates over the -40°C to +125°C temperature range.
Applications
- AC Phase Detection
- Flexible Zero Crossing Detection
- Industrial Lighting Dimming
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MAX22707
Documentation
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| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
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| MAX22707AUB+ |
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| MAX22707AUB+T |
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- MAX22707AUB+
- Pin/Package Drawing
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10-MINI_SO-N/A
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- MAX22707AUB+T
- Pin/Package Drawing
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10-MINI_SO-N/A
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
Software & Part Ecosystem
Evaluation Kits 1
MAX22707EVKIT
Evaluation Kit for the MAX22707
Product Detail
The MAX22707 evaluation kit (EV kit) provides a proven design to evaluate MAX22707 low power, precision zero- crossing detector.
The MAX22707 EV kit features an isolated power and signal interface to configure and evaluate different modes. The EV kit features two independent MAX22707 sections that can be evaluated in lowpass filter (LPF) configuration mode and bandpass filter (BPF) configuration mode.
The EV kit comes with two MAX22707AUB+ (10 µMAX, 3.05mm x 5.05mm footprint) devices installed.
Applications
- AC Phase Detection
- Flexible Zero Crossing Detection
- Industrial Lighting Dimming
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