Analog Devices Inc. ADA4420-6ARUZ-R7

Overview

ADA4420-6ARUZ-R7 from Analog Devices is a low-cost, 6-channel video reconstruction filter IC designed for consumer HD/SD video signal conditioning. It integrates three sixth-order Butterworth filters for HD (YPrPb/RGB) and three for SD (Y/C or CVBS), delivers 6 dB gain, rail-to-rail outputs with 250 mV DC offset, and operates from a single 5 V supply at 32 mA quiescent current. It is used in HDTVs and DVD recorders to reconstruct DAC output signals while maintaining NTSC differential gain (0.19%) and phase (0.76°) accuracy.

For engineers reviewing the ADA4420-6ARUZ-R7 datasheet, ADA4420-6ARUZ-R7 pinout, ADA4420-6ARUZ-R7 application, or ADA4420-6ARUZ-R7 equivalent, key selection criteria include HD −1 dB bandwidth (26 MHz), SD −1 dB bandwidth (8.6 MHz), disable functionality (<8 μA standby), dual-termination drive capability (two 75 Ω loads per channel), and TSSOP-20 package compatibility with ac/dc-coupled video interface designs.

Technical Context

The ADA4420-6ARUZ-R7 implements six independent sixth-order Butterworth filters-three optimized for HD component signals (YPrPb/RGB) with 26 MHz −1 dB bandwidth and 48 dB rejection at 75 MHz, and three for SD composite/s-video signals (CVBS/Y/C) with 8.6 MHz −1 dB bandwidth and 45 dB out-of-band rejection at 27 MHz. Each channel includes a transparent sync tip clamp enabling AC-coupled inputs without external DC restoration.

Its rail-to-rail output drivers provide 6 dB fixed gain and a built-in 250 mV DC offset, allowing direct DC coupling to downstream 75 Ω transmission lines without large coupling capacitors. The DIS pin enables hardware-controlled power-down, reducing supply current to <13 μA while isolating outputs with −96 dB input-to-output isolation at 5 MHz.

Key Specifications

Pinout & Package

The ADA4420-6ARUZ-R7 is packaged in a 20-lead TSSOP (RU-20) with exposed pad, rated for −40°C to +85°C operation. Pin 1 is located at the top-left corner (marking dot adjacent), and pins 4, 10, 11, and 15 are no-connect (NC) terminals requiring no connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar video reconstruction filter applications.

Compared with ADA4420-6ARUZ-R7, the QSOP variant offers lower thermal resistance but fewer pins and no NC placeholders, while MAX4096EEE+ lacks HD filtering entirely-making it unsuitable for mixed-definition systems requiring simultaneous SD and HD output conditioning.

Availability

ADA4420-6ARUZ-R7 is available at Aetrix Electronics and suitable for HDTV manufacturing, set-top box production, and DVD player design requiring stable component supply, RoHS-compliant packaging, and extended temperature support (−40°C to +85°C).

Supply support for ADA4420-6ARUZ-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.

The ADA4420-6ARUZ-R7 belongs to Analog Devices' video signal conditioning product line, engineered specifically for cost-sensitive consumer video equipment requiring integrated SD/HD reconstruction filtering, low power, and simplified board-level implementation.

FAQ

What is the function of the DIS pin on the ADA4420-6ARUZ-R7?

The DIS pin on the ADA4420-6ARUZ-R7 is an active-low hardware disable input. When pulled to GND, it places the device in ultra-low-power standby mode, reducing quiescent supply current to 7 μA typical while providing −96 dB input-to-output isolation at 5 MHz. This feature enables dynamic power management in multi-source video systems and is fully specified with 20 ns assert time and 450 ns de-assert time.

Can the ADA4420-6ARUZ-R7 drive two 75 Ω loads simultaneously on one output channel?

Yes, the ADA4420-6ARUZ-R7 is explicitly designed to drive two doubly terminated 75 Ω loads per channel. Its output drivers deliver rail-to-rail swing with 6 dB gain and 250 mV DC offset, enabling direct connection to dual coaxial outputs without external buffers. Test data confirms stable performance with ≤0.5 dB gain flatness degradation and maintained differential gain/phase specs under this load condition.

Does the ADA4420-6ARUZ-R7 require external DC restoration circuitry for AC-coupled inputs?

No, the ADA4420-6ARUZ-R7 incorporates a transparent sync tip clamp on all six channels, eliminating the need for external DC restoration. When AC-coupled inputs are applied, the clamp automatically establishes a stable 0 V reference at the sync tip, preserving signal integrity without diodes, resistors, or capacitors. This feature is confirmed in the Applications Information section and validated across −40°C to +85°C.

What is the maximum operating temperature range for the ADA4420-6ARUZ-R7?

The ADA4420-6ARUZ-R7 is rated for operation from −40°C to +85°C, meeting extended industrial temperature requirements. This range is verified across all electrical specifications including HD/SD bandwidth, differential gain/phase, and disable functionality, and is supported by thermal resistance data (θJA = 143°C/W) and maximum power dissipation curves in the datasheet.

How does the ADA4420-6ARUZ-R7 handle DC-coupled outputs to 75 Ω cables?

The ADA4420-6ARUZ-R7 supports DC-coupled outputs to 75 Ω cables via its built-in 250 mV DC output offset, which centers the 2.0 V p-p video signal within the 0.25 V to 4.6 V output voltage range. This eliminates the need for large coupling capacitors (e.g., 220 µF) typically required in AC-coupled designs, reducing board area, cost, and low-frequency droop risk in long-cable applications.