Overview
The AD724JRZ-R7, 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 separate Y/C (S-Video) outputs, making it versatile for various video encoding applications. It operates from a single +5 V supply and does not require external delay lines or filters, simplifying the design process.
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 | V | |||
| Operating Temperature | 0°C | +70°C | °C | ||
| Package Type | 16-Lead SOIC Wide |
Key Features
- Low cost, integrated solution for RGB to NTSC/PAL encoding.
- Operates from a single +5 V 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 minimal external components.
- Logic selectable NTSC or PAL encoding modes.
- Compact 16-lead SOIC package.
- Accepts either HSYNC and VSYNC or CSYNC signals.
- Phase lock to external subcarrier.
Applications
The AD724JRZ-R7 is primarily used for converting RGB color component signals into NTSC or PAL video formats, making it suitable for a variety of applications including:
- Video encoding in consumer electronics.
- Graphics and video processing systems.
- Industrial video monitoring systems.
- Medical imaging devices.
- Any system requiring conversion of RGB signals to NTSC or PAL video standards.
Q & A
- What is the primary function of the AD724JRZ-R7?
The AD724JRZ-R7 converts red, green, and blue color component signals into their corresponding luminance and chrominance signals in accordance with either NTSC or PAL standards. - What is the operating voltage of the AD724JRZ-R7?
The device operates from a single +5 V supply. - Does the AD724JRZ-R7 require external filters or delay lines?
No, the AD724JRZ-R7 does not require external filters or delay lines. - What types of sync signals can the AD724JRZ-R7 accept?
The device can accept either HSYNC and VSYNC or a standard CSYNC signal. - What is the package type of the AD724JRZ-R7?
The AD724JRZ-R7 comes in a 16-lead SOIC Wide package. - What are the supported video standards for the AD724JRZ-R7?
The device supports both NTSC and PAL video standards. - Can the AD724JRZ-R7 be powered down when not in use?
Yes, the AD724JRZ-R7 can be powered down when not in use. - What is the temperature range for the AD724JRZ-R7?
The operating temperature range is from 0°C to +70°C. - Does the AD724JRZ-R7 have onboard DC clamping?
Yes, the device includes an onboard DC clamp. - How does the AD724JRZ-R7 handle clock inputs?
The device accepts either FSC or 4FSC clock, or it can generate the necessary subcarrier clock using a low-cost parallel-resonant crystal.
