Overview
The ADA4420-6ARQZ is a low-cost, 6-channel video reconstruction filter designed by Analog Devices Inc. for consumer applications. It features six independent sixth-order Butterworth filters/buffers, with three channels dedicated to standard definition (Y/C or CVBS) and three to high definition component signals (YPbPr or RGB). This device operates from a single 5 V supply and has a low quiescent current of 32 mA, making it ideal for applications where power consumption is critical. The ADA4420-6ARQZ also includes a disable feature that reduces the supply current to less than 8 μA when the device is not in use, further enhancing power efficiency.
Key Specifications
| Parameter | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| DC Voltage Gain | All channels | 5.8 | 6.0 | 6.2 | dB |
| Input Voltage Range, All Inputs | 0 | 2.1 | V | ||
| Output Voltage Range, All Outputs | 0.25 | 4.6 | V | ||
| Linear Output Current per Channel | 30 | mA | |||
| Filter Input Bias Current | 1 | μA | |||
| −1 dB Bandwidth | HD channel | 26 | MHz | ||
| −3 dB Bandwidth | HD channel | 8.5 | 10 | MHz | |
| Out-of-Band Rejection | f = 27 MHz | 42 | 45 | dB | |
| Crosstalk | f = 1 MHz | −68 | dB | ||
| Operating Voltage | 4.75 | 5.25 | V | ||
| Quiescent Supply Current | Active, DIS = 1 | 32 | 36 | mA | |
| Quiescent Supply Current | Disabled, DIS = 0 | 7 | 13 | μA | |
| Output DC Offset | All channels | 135 | 250 | 375 | mV |
| Disable Assert Voltage | DIS = 0 to 1 | 1.9 | V | ||
| Disable Assert Time | DIS = 0 to 1 | 20 | ns | ||
| Disable De-Assert Time | DIS = 1 to 0 | 450 | ns | ||
| Operating Temperature Range | −40 | +85 | °C |
Key Features
- Independent Channels: Six independent sixth-order Butterworth filters/buffers, with three for standard definition (Y/C or CVBS) and three for high definition component signals (YPbPr or RGB).
- Low Power Consumption: Operates from a single 5 V supply with a low quiescent current of 32 mA, and reduces to less than 8 μA when disabled.
- Transparent Sync Tip Clamp: Allows ac coupling of the inputs without requiring dc restoration.
- Rail-to-Rail Output Capabilities: Output drivers have rail-to-rail output capabilities with 6 dB gain.
- Built-in Offset: A built-in offset of 250 mV allows the outputs to be dc-coupled, eliminating the need for large coupling capacitors.
- High Output Drive: Each output can drive up to two 75 Ω doubly terminated cables.
- Extended Temperature Range: Operates in the extended industrial temperature range of −40°C to +85°C.
- Package Options: Available in 16-lead QSOP and 20-lead TSSOP packages).
Applications
- Set-Top Boxes: Ideal for video reconstruction and anti-alias filtering in set-top boxes).
- DVD Players and Recorders: Suitable for DVD players and recorders due to its high output drive and low power consumption).
- HDTVs and Projectors: Used in high-definition TVs and projectors for video signal processing).
- Personal Video Recorders: Applicable in personal video recorders for efficient video filtering).
Q & A
- What is the ADA4420-6ARQZ used for?
The ADA4420-6ARQZ is a low-cost video reconstruction filter designed for consumer applications, particularly for video reconstruction and anti-alias filtering in devices like set-top boxes, DVD players, HDTVs, and personal video recorders).
- How many channels does the ADA4420-6ARQZ have?
The ADA4420-6ARQZ has six independent channels, with three for standard definition and three for high definition component signals).
- What is the operating voltage of the ADA4420-6ARQZ?
The ADA4420-6ARQZ operates from a single 5 V supply).
- What is the quiescent current of the ADA4420-6ARQZ when active?
The quiescent current is 32 mA typical when the device is active).
- How does the disable feature work on the ADA4420-6ARQZ?
The disable feature reduces the supply current to less than 8 μA when the device is not in use, allowing for further power conservation).
- What is the output drive capability of the ADA4420-6ARQZ?
Each output can drive up to two 75 Ω doubly terminated cables).
- What is the temperature range of the ADA4420-6ARQZ?
The ADA4420-6ARQZ operates in the extended industrial temperature range of −40°C to +85°C).
- In what packages is the ADA4420-6ARQZ available?
The ADA4420-6ARQZ is available in 16-lead QSOP and 20-lead TSSOP packages).
- What is the built-in offset of the ADA4420-6ARQZ outputs?
The built-in offset is 250 mV, allowing the outputs to be dc-coupled without large coupling capacitors).
- How does the transparent sync tip clamp function in the ADA4420-6ARQZ?
The transparent sync tip clamp allows ac coupling of the inputs without requiring dc restoration).
