Overview
The AD724JR-REEL7, produced by Analog Devices Inc., is a low-cost RGB to NTSC/PAL Encoder. This integrated circuit converts red, green, and blue color component signals into their corresponding luminance (baseband amplitude) and chrominance (subcarrier amplitude and phase) signals, adhering to either NTSC or PAL standards. The device provides composite video output and can drive 75 Ω, reverse-terminated cables. It operates from a single +5 V supply and does not require external delay lines or filters, making it a compact and efficient solution for video encoding applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Amplitude (Full Scale) | 714 mV p-p | mV p-p | |||
| Black Level | 0.8 V | V | |||
| Input Resistance (RIN, GIN, BIN) | 1 MΩ | Ω | |||
| Input Capacitance | 5 pF | pF | |||
| Supply Voltage | +5 V ± 5% | V | |||
| Operating Temperature Range | 0°C | +70°C | °C |
Key Features
- Low-cost, integrated solution for RGB to NTSC/PAL encoding
- +5 V operation with single supply
- Accepts FSC clock or crystal, or 4FSC clock
- Composite video and separate Y/C (S-Video) outputs
- Luma and chroma outputs are time-aligned
- No external filters or delay lines required
- Onboard DC clamp and sampled-data delay line
- Logic selectable NTSC or PAL encoding modes
- Compact 16-lead SOIC package
- CMOS and TTL compatible logical inputs
Applications
The AD724JR-REEL7 is primarily used for converting RGB color component signals into NTSC or PAL video formats, making it suitable for various applications such as:
- Video encoding in consumer electronics
- Graphics and gaming systems
- Industrial video processing
- Medical imaging devices
- Any system requiring RGB to NTSC/PAL conversion
Q & A
- What is the primary function of the AD724JR-REEL7?
The AD724JR-REEL7 converts red, green, and blue color component signals into their corresponding luminance and chrominance signals in accordance with NTSC or PAL standards.
- What is the operating voltage of the AD724JR-REEL7?
The device operates from a single +5 V supply.
- Does the AD724JR-REEL7 require external filters or delay lines?
No, the AD724JR-REEL7 does not require external filters or delay lines.
- What types of clock inputs does the AD724JR-REEL7 accept?
The device accepts FSC clock or crystal, or 4FSC clock, and can also generate the necessary subcarrier clock using an on-chip oscillator and a parallel-resonant crystal.
- How does the AD724JR-REEL7 handle sync signals?
The AD724JR-REEL7 can accept either HSYNC and VSYNC or a standard CSYNC signal and generates the composite sync signal on-chip.
- What is the temperature range for the AD724JR-REEL7?
The device is specified for the 0°C to +70°C commercial temperature range.
- What package type is the AD724JR-REEL7 available in?
The AD724JR-REEL7 is available in a 16-lead SOIC package.
- Is the AD724JR-REEL7 compatible with CMOS and TTL logic levels?
- Can the AD724JR-REEL7 be powered down when not in use?
- What kind of outputs does the AD724JR-REEL7 provide?
The AD724JR-REEL7 provides composite video output and separate Y/C (S-Video) outputs.
