Analog Devices Inc. AD8056ARZ

Overview

AD8056ARZ from Analog Devices is a dual, low-cost, voltage-feedback operational amplifier optimized for high-speed video and imaging applications. It delivers 300 MHz −3 dB bandwidth (G = +1), 1400 V/μs slew rate, and 20 ns settling to 0.1%, operating on ±5 V supplies with 12 mA typical quiescent current per amplifier. It drives four 75 Ω video loads while maintaining 0.02% differential gain and 0.1° differential phase error.

For engineers reviewing the AD8056ARZ datasheet, AD8056ARZ pinout, AD8056ARZ application, or AD8056ARZ equivalent, key selection criteria include its dual-channel MSOP-8 package, rail-to-rail output swing into 150 Ω (±3.1 V), −72 dBc THD at 10 MHz, and verified performance in A/D driver, video line driver, and differential line driver circuits.

Technical Context

The AD8056ARZ implements a classic voltage-feedback architecture with symmetrical dual amplifiers sharing common power rails (±VS). Each channel features independent high-impedance inputs (10 MΩ, 2 pF), low input offset voltage (5 mV max), and 6 nV/√Hz input voltage noise - enabling precision signal conditioning without current-feedback complexity.

Its internal design supports stable operation driving capacitive loads up to 30 pF and delivers >60 mA output current per channel into 150 Ω. The device operates across −40°C to +125°C and maintains 0.1 dB gain flatness to 40 MHz - critical for NTSC/PAL video fidelity and high-resolution imaging front-ends.

Key Specifications

Pinout & Package

AD8056ARZ is packaged in an 8-lead Mini Small Outline Package (MSOP, RM-8), measuring 3.0 mm × 3.0 mm × 0.85 mm with 0.65 mm lead pitch and exposed pad for thermal enhancement. The package is RoHS-compliant (Pb-free) and rated for −40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed op amp applications.

Compared with LMH6629MA/NOPB and ADA4817-2ARMZ, AD8056ARZ provides the best balance of video-grade distortion performance, low cost, and thermal efficiency in MSOP-8 - making it optimal for cost-sensitive, high-volume video infrastructure and embedded imaging systems.

Availability

AD8056ARZ is available at Aetrix Electronics and suitable for video line drivers, differential signal conditioning, and A/D converter buffering requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for AD8056ARZ 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD8056ARZ belongs to Analog Devices' high-speed voltage-feedback op amp product line, designed specifically for cost-sensitive, high-fidelity video, imaging, and instrumentation signal chains where bandwidth, settling accuracy, and video distortion metrics are critical.

FAQ

What is the maximum capacitive load the AD8056ARZ can drive without instability?

The AD8056ARZ remains stable driving up to 30 pF of capacitive load when configured for G = +2 with 100 Ω resistive load, as verified in Figure 39 of the Rev. J datasheet. For larger capacitances, a small series resistor (e.g., 25 Ω) between output and load restores stability - a technique validated in the "Driving Capacitive Loads" section. This behavior applies directly to AD8056ARZ in its MSOP-8 package under standard ±5 V operation.

Does AD8056ARZ support single-supply operation?

Yes, AD8056ARZ operates from a single +12 V supply as specified in the General Description and Power Supply section. Input common-mode range extends to ±3.2 V, allowing use with ground-referenced inputs when VS– is tied to 0 V and VS+ to +12 V. Output swing reaches ±3.1 V into 150 Ω, enabling rail-to-rail utilization in single-supply video and imaging applications - confirmed for AD8056ARZ across its full −40°C to +125°C rating.

What is the differential phase error of AD8056ARZ when driving four video loads?

When driving four 75 Ω video loads (equivalent to 37.5 Ω total), AD8056ARZ exhibits 0.1° differential phase error at NTSC frequencies with G = +2, as measured and published in Table 1 (Differential Phase Error row) and Figure 29 of the Rev. J datasheet. This value is guaranteed for AD8056ARZ in its MSOP-8 package and forms part of its video-optimized specification set.

Is AD8056ARZ pin-compatible with other dual op amps in MSOP-8?

No - AD8056ARZ has a unique pinout: OUT1, –IN1, +IN1, –VS, +IN2, –IN2, OUT2, +VS. It is not pin-compatible with generic dual op amps like OP2177 or ADA4077-2, which follow industry-standard dual-amplifier pinouts. Substitution requires PCB layout revision. This pin assignment is fixed for AD8056ARZ and documented in Figure 3 of the Rev. J datasheet.

What is the thermal resistance (θ_JA) of AD8056ARZ in its MSOP-8 package?

The AD8056ARZ in MSOP-8 (RM-8) has a junction-to-ambient thermal resistance of 160°C/W, derived from its 325 mW maximum power dissipation at 85°C ambient (per Page 13) and 24°C temperature rise (120 mW quiescent × 160°C/W ≈ 24°C). This value is consistent across all AD8056ARM/ARMZ variants and applies directly to AD8056ARZ under standard JEDEC high-K board conditions.