Analog Devices Inc. ADA4412-3ARQZ-RL

Overview

ADA4412-3ARQZ-RL from Analog Devices is a triple-channel, sixth-order video reconstruction filter IC designed for RGB, YPbPr, and YUV component video signal conditioning in HD/SD systems. It delivers selectable 36 MHz / 18 MHz / 9 MHz cutoff frequencies, rail-to-rail 4.5 V_p-p output swing on +5 V supply, ±500 mV input-referred DC offset adjustment, and 265 mW total quiescent power. It is used in HDTV front-end filtering and set-top box video output stages.

For engineers reviewing the ADA4412-3ARQZ-RL datasheet, ADA4412-3ARQZ-RL pinout, ADA4412-3ARQZ-RL application, or ADA4412-3ARQZ-RL equivalent, key selection criteria include cutoff frequency configurability via F_SEL_A/F_SEL_B logic inputs, dual-supply (±5 V) or single-supply (+5 V) operation, 75 Ω doubly terminated cable drive capability, −1 dB bandwidth of 31.5 MHz at 36 MHz setting, and integrated DC level control for sync-blanking alignment.

Technical Context

The ADA4412-3ARQZ-RL implements three independent sixth-order Butterworth filters with group-delay-optimized response-7 ns variation (36 MHz mode), 14 ns (18 MHz), and 27 ns (9 MHz). Each channel features fixed ×2 gain, high-impedance dc-coupled inputs, and rail-to-rail output buffers capable of driving two 75 Ω loads simultaneously.

Filter cutoff is selected by two TTL/CMOS-compatible logic inputs (F_SEL_A, F_SEL_B), enabling four combinations: all-36 MHz, Y/G-36 MHz + Pb/B&Pr/R-18 MHz, all-18 MHz, or all-9 MHz. DC output offset is controlled differentially across LEVEL1/LEVEL2 pins, scaling linearly with ×2 gain to yield ±500 mV input-referred adjustment range.

Key Specifications

Pinout & Package

Package: 20-lead QSOP (RQ-20), 0.154" body width, JEDEC MO-137-AD compliant, θ_JA = 83°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-channel video filter applications.

Compared with ADA4412-3ARQZ and LMH0387SQ/NOPB, the ADA4412-3ARQZ-RL offers unique integration of selectable analog filtering, DC level control, and dual-75Ω drive in one QSOP package-enabling direct replacement of legacy discrete filter+driver designs without layout revision.

Availability

ADA4412-3ARQZ-RL is available at Aetrix Electronics and suitable for set-top boxes, HDTVs, DVD players, and professional projectors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADA4412-3ARQZ-RL 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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and communications.

The ADA4412-3ARQZ-RL belongs to Analog Devices' video signal conditioning product line, engineered specifically for high-fidelity analog video reconstruction in consumer and professional AV equipment where bandwidth flexibility, low distortion, and compact integration are critical.

FAQ

What video standards does the ADA4412-3ARQZ-RL support?

The ADA4412-3ARQZ-RL supports RGB, YPbPr, YUV, SD (NTSC/PAL), and HD (720p, 1080i) video standards through its selectable 36 MHz / 18 MHz / 9 MHz filter configurations. Its −1 dB bandwidth of 31.5 MHz at 36 MHz setting meets SMPTE 253M requirements for 1080i, while the 9 MHz mode satisfies NTSC differential phase/gain specs (0.04% / 0.16°). The ADA4412-3ARQZ-RL is explicitly validated for use in set-top boxes, DVD players, and HDTVs per its Applications section.

Can the ADA4412-3ARQZ-RL operate on a single +5 V supply?

Yes, the ADA4412-3ARQZ-RL operates on a single +5 V supply (range: +4.5 V to +12 V) with rail-to-rail output swing of 4.5 V_p-p, enabling full compliance with 1 V_p-p video amplitude standards. In this configuration, input voltage range extends from 100 mV below ground to within 2.0 V of VCC, and DC offset adjustment via LEVEL1/LEVEL2 ensures safe negative excursions. The ADA4412-3ARQZ-RL datasheet specifies quiescent current of 53–56 mA and 265 mW total power under +5 V operation.

How is cutoff frequency selected on the ADA4412-3ARQZ-RL?

Cutoff frequency on the ADA4412-3ARQZ-RL is selected using two logic inputs: F_SEL_A (Pin 8) and F_SEL_B (Pin 9). These TTL/CMOS-compatible pins configure four modes: 00 = all 36 MHz, 01 = Y/G-36 MHz + Pb/B&Pr/R-18 MHz, 10 = all 18 MHz, and 11 = all 9 MHz. The ADA4412-3ARQZ-RL datasheet Table 7 confirms these mappings and specifies input logic thresholds (0.8 V for Logic 0, 2.0 V for Logic 1), ensuring robust operation across voltage margins.

What is the purpose of the LEVEL1 and LEVEL2 pins on the ADA4412-3ARQZ-RL?

The LEVEL1 (Pin 1) and LEVEL2 (Pin 20) pins form a differential input that controls DC output offset voltage across all three channels. Per Equation 1 in the ADA4412-3ARQZ-RL datasheet, V_OS = 2 × (V_LEVEL1 − V_LEVEL2), yielding an input-referred adjustment range of ±500 mV. This allows precise blanking-level alignment-e.g., setting LEVEL1 = 300 mV and LEVEL2 = 0 V produces +600 mV output offset-critical for single-supply video systems to avoid rail clipping.

Does the ADA4412-3ARQZ-RL support dual-supply operation?

Yes, the ADA4412-3ARQZ-RL supports dual-supply operation with ±5 V (VEE = −5 V, VCC = +5 V), enabling true bipolar signal handling where negative-going video excursions must swing below ground. In this mode, input voltage range expands to V_S− − 0.1 V to V_S+ − 2.0 V, and PSRR improves to 66–74 dB (positive) and 59–62 dB (negative). The ADA4412-3ARQZ-RL's dual-supply capability is validated in Table 2 of its datasheet and recommended for applications demanding maximum video fidelity with minimal DC shift.