Overview
The AD725ARZ-R7, produced by Analog Devices Inc., is a low-cost, general-purpose RGB to NTSC/PAL encoder. This integrated circuit converts red, green, and blue color component signals into their corresponding luminance and chrominance signals, adhering to either NTSC or PAL video standards. The device provides separate outputs for luminance, chrominance, and composite video, each at twice the standard signal levels to drive 75 Ω, reverse-terminated cables. It is designed for various video encoding applications, emphasizing low power consumption and high performance.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Amplitude (Full Scale) | - | 0.714 | - | mV p-p |
| Input Resistance (RIN, GIN, BIN) | - | 1 | - | MΩ |
| Input Capacitance | - | 5 | - | pF |
| Logic Low Input Voltage | 0.8 | - | 1 | V |
| Logic High Input Voltage | 2 | - | - | V |
| Luminance Bandwidth (NTSC) | - | 4.4 | - | MHz |
| Luminance Bandwidth (PAL) | - | 5.2 | - | MHz |
| Operating Temperature | -40 | - | 85 | °C |
| Max Power Dissipation | - | - | 800 | mW |
| Supply Voltage | - | 5 | - | V |
Key Features
- Composite Video Output: Both NTSC and PAL standards supported.
- Chrominance and Luminance (S-Video) Outputs.
- Luma Trap Port to eliminate cross color artifacts.
- TTL Logic Levels.
- Integrated Delay Line and Auto-Tuned Filters.
- Drives 75 Ω reverse-terminated loads.
- Low Power +5 V Operation.
- Power-Down to <1 μA.
- Very Low Cost.
Applications
- RGB/VGA to NTSC/PAL Encoding.
- Personal Computers/Network Computers.
- Video Games.
- Video Conference Cameras.
- Digital Still Cameras.
Q & A
- What is the primary function of the AD725ARZ-R7? The AD725ARZ-R7 is an RGB to NTSC/PAL encoder that converts red, green, and blue color component signals into luminance and chrominance signals.
- What video standards does the AD725ARZ-R7 support? The AD725ARZ-R7 supports both NTSC and PAL video standards.
- What are the key outputs provided by the AD725ARZ-R7? The device provides separate outputs for luminance, chrominance, and composite video.
- What is the purpose of the Luma Trap Port? The Luma Trap Port is used to eliminate cross color artifacts.
- What is the typical operating voltage of the AD725ARZ-R7? The typical operating voltage is +5 V.
- What is the maximum power dissipation of the AD725ARZ-R7? The maximum power dissipation is 800 mW.
- What are the operating temperature ranges for the AD725ARZ-R7? The operating temperature ranges from -40°C to 85°C.
- How does the AD725ARZ-R7 handle power-down mode? In power-down mode, the device consumes less than 1 μA.
- What type of logic levels does the AD725ARZ-R7 use? The AD725ARZ-R7 uses TTL logic levels.
- What are some common applications of the AD725ARZ-R7? Common applications include RGB/VGA to NTSC/PAL encoding, personal computers, video games, video conference cameras, and digital still cameras.
