Analog Devices Inc. ADA4420-6ARQZ-R7

Overview

ADA4420-6ARQZ-R7 from Analog Devices is a low-cost 6-channel video reconstruction filter for consumer HD/SD video systems, integrating three sixth-order Butterworth SD filters (8.6 MHz −1 dB BW) and three HD filters (26 MHz −1 dB BW), with rail-to-rail 6 dB gain outputs, 250 mV DC offset, and disable control - deployed in set-top boxes and HDTVs.

For engineers reviewing the ADA4420-6ARQZ-R7 datasheet, ADA4420-6ARQZ-R7 pinout, ADA4420-6ARQZ-R7 application, or ADA4420-6ARQZ-R7 equivalent, key selection criteria include SD/HD channel bandwidth separation, transparent sync tip clamp for AC-coupled inputs, dual-75 Ω load drive capability per output, and 32 mA quiescent current at 5 V.

Technical Context

The ADA4420-6ARQZ-R7 implements six independent sixth-order Butterworth filters - three optimized for SD signals (Y/C or CVBS, −1 dB BW = 8.6 MHz) and three for HD component signals (YPrPb or RGB, −1 dB BW = 26 MHz). Each channel includes a transparent sync tip clamp enabling AC-coupled input without external DC restoration.

It operates from a single 5 V supply, delivers rail-to-rail outputs with 6 dB fixed gain and 250 mV DC offset to support DC-coupled termination into 75 Ω loads, and features a logic-controlled DIS pin that reduces supply current to <8 μA in disabled state while maintaining >96 dB input-to-output isolation at 5 MHz.

Key Specifications

Pinout & Package

The ADA4420-6ARQZ-R7 is packaged in a 16-lead QSOP (RQ-16), 3.9 mm × 4.9 mm body, 1.0 mm height, with two GND pins (Pins 12 & 13) and single VCC (Pin 4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADA4420-6ARQZ-R7, the ADA4420-6ARUZ-R7 offers identical electrical performance in a smaller footprint but higher thermal resistance, while the MAX4019ESE+ provides SD filtering only - making ADA4420-6ARQZ-R7 the sole option supporting concurrent SD/HD filtering, disable control, and dual-75 Ω drive in QSOP packaging.

Availability

ADA4420-6ARQZ-R7 is available at Aetrix Electronics and suitable for set-top boxes, HDTVs, and DVD players requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for ADA4420-6ARQZ-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, headquartered in Norwood, MA.

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

FAQ

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

The DIS pin on the ADA4420-6ARQZ-R7 is an active-low disable control. When pulled below 1.9 V, it places the device in ultra-low-power mode, reducing quiescent current to 7 μA typical while maintaining >96 dB input-to-output isolation at 5 MHz. The disable de-assert time is 450 ns, enabling rapid reactivation for dynamic video source switching in devices like set-top boxes.

Can the ADA4420-6ARQZ-R7 drive two 75 Ω loads simultaneously from one output?

Yes, each output of the ADA4420-6ARQZ-R7 is rated to drive two doubly terminated 75 Ω cables - verified across temperature and frequency. This capability eliminates external buffer amplifiers in applications such as HDTV rear-panel YPrPb outputs or DVD player dual-monitor feeds, leveraging its rail-to-rail 6 dB gain and 250 mV DC offset for direct DC coupling.

Does the ADA4420-6ARQZ-R7 support both AC- and DC-coupled inputs?

Yes, the ADA4420-6ARQZ-R7 supports both AC- and DC-coupled inputs. For DC-coupled operation, input signals must remain within 0–2.1 V. For AC-coupled inputs, its transparent sync tip clamp automatically restores DC level - eliminating external clamping diodes or DC restorers, a key advantage in compact set-top box and projector designs.

What is the significance of the 250 mV DC output offset in the ADA4420-6ARQZ-R7?

The 250 mV DC output offset in the ADA4420-6ARQZ-R7 enables direct DC coupling into standard 75 Ω video loads, removing the need for large (≥220 µF) AC-coupling capacitors. This reduces board area, cost, and low-frequency droop in field/line timing - critical for stable video output in DVD players and personal video recorders operating across −40°C to +85°C.

How does the ADA4420-6ARQZ-R7 handle SD and HD video signals differently?

The ADA4420-6ARQZ-R7 uses separate sixth-order Butterworth filter paths: three SD channels (−1 dB BW = 8.6 MHz) optimized for NTSC/PAL CVBS/Y/C, and three HD channels (−1 dB BW = 26 MHz) optimized for YPrPb/RGB up to 1080i. Each path maintains distinct differential gain (0.19% SD) and HD rejection (48 dB @ 75 MHz), ensuring signal integrity across both legacy and modern video formats.