Analog Devices Inc. AD8055ARZ

Overview

AD8055ARZ from Analog Devices is a single-channel, 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, 20 ns settling to 0.1%, 6 nV/√Hz input voltage noise, and drives 150 Ω video loads with 0.01% differential gain error - enabling precision analog signal conditioning in professional camera front-ends and A-to-D driver stages.

For engineers reviewing the AD8055ARZ datasheet, AD8055ARZ pinout, AD8055ARZ application, or AD8055ARZ equivalent, key selection criteria include its SOIC-8 package compatibility, ±5 V / +12 V dual/single supply operation, 5.4 mA quiescent current, rail-to-rail output swing into 150 Ω, and verified performance in video line driving, photodiode preamplification, and active filter topologies.

Technical Context

The AD8055ARZ implements a classic voltage-feedback architecture with high open-loop gain (71 dB typ), low input bias current (1.2 μA max), and stable unity-gain compensation - eliminating need for external compensation networks. Its internal design supports fast transient response without peaking up to 30 pF capacitive load when properly terminated.

It operates across −40°C to +125°C with guaranteed specifications including 0.1 dB gain flatness to 40 MHz, −72 dBc THD at 10 MHz, and CMRR of 82 dB at ±2.5 V common-mode voltage - making it suitable for wideband analog signal chains where phase fidelity and harmonic suppression are critical.

Key Specifications

Pinout & Package

AD8055ARZ is packaged in an 8-lead SOIC_N (R-8) compliant with JEDEC MS-012-AA, with 1.27 mm pitch, 5.00 mm × 3.99 mm body, and exposed pad not present. Pin 1 is marked by notch or bevel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8057ARZ, AD8055ARZ provides higher bandwidth and lower THD for broadcast video; compared with LMH6629MA/NOPB, AD8055ARZ offers lower power, proven video specs, and direct SOIC-8 footprint compatibility without layout redesign.

Availability

AD8055ARZ is available at Aetrix Electronics and suitable for professional video capture, photodiode preamplification, and high-speed data acquisition requiring stable component supply across extended temperature ranges.

Supply support for AD8055ARZ 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 AD8055ARZ belongs to the AD8055/AD8056 family of low-cost, high-speed voltage-feedback amplifiers designed specifically for video, imaging, and instrumentation signal chains where bandwidth, noise, and distortion must be tightly controlled.

FAQ

What is the maximum capacitive load the AD8055ARZ can drive without instability?

The AD8055ARZ remains stable with up to 30 pF capacitive load when configured for G = +2 into 100 Ω, as confirmed in Figure 39 of the Rev. J datasheet. For larger loads, a series output resistor (e.g., 25 Ω) is recommended per Figure 41 to suppress peaking. This behavior is validated under standard test conditions with ±5 V supplies and 100 Ω termination.

Does the AD8055ARZ support single-supply operation?

Yes, the AD8055ARZ operates on a single +12 V supply per Table 1 and General Description. Input common-mode range extends to 3.2 V below positive rail, and output swings to within 1.9 V of rails into 150 Ω. Decoupling must follow Figure 34: 0.1 µF ceramic + 4.7 µF bulk capacitor on +VS, with −VS tied to ground.

What is the differential phase error of the AD8055ARZ in NTSC video applications?

The AD8055ARZ achieves 0.02° differential phase error driving a 150 Ω load at G = +2 under NTSC conditions, as specified in Table 1. When driving four 37.5 Ω video loads simultaneously, differential phase increases to 0.1° - both values are measured and guaranteed across −40°C to +125°C.

Is the AD8055ARZ pin-compatible with other op amps in SOIC-8 packages?

No - the AD8055ARZ has a nonstandard pinout: Pin 1 = −IN, Pin 2 = +IN, Pin 3 = VOUT, Pin 4 = −VS, Pins 5–6 = NC, Pin 7 = +VS, Pin 8 = NC. This differs from industry-standard SOIC-8 op amps (e.g., LM741, OP27), which place +IN at Pin 3 and VOUT at Pin 6. Layout reuse requires verification against Figure 1.

What is the thermal resistance (θ_JA) of the AD8055ARZ in SOIC-8 package?

The AD8055ARZ in R-8 SOIC-8 package has a junction-to-ambient thermal resistance of 150°C/W, derived from Figure 5's maximum power dissipation curve: at 25°C ambient, 270 mW max dissipation corresponds to ~40.5°C rise, yielding θ_JA ≈ 150°C/W. This value assumes standard JEDEC 2s2p board layout per MS-012-AA.