Analog Devices Inc. AD8002ARMZ

Overview

AD8002ARMZ from Analog Devices is a dual current feedback amplifier optimized for high-speed video and ADC driver applications. It delivers 600 MHz −3 dB bandwidth (G = +1), 1200 V/µs slew rate, 0.01% differential gain error, and operates on ±5 V supplies with only 5.0 mA per amplifier (50 mW total). It drives 75 Ω video loads and eight back-terminated 75 Ω loads while maintaining professional-grade NTSC performance.

For engineers reviewing the AD8002ARMZ datasheet, AD8002ARMZ pinout, AD8002ARMZ application, or AD8002ARMZ equivalent, key selection criteria include its current feedback architecture, 8-lead MSOP package, dual-channel isolation (−60 dB crosstalk at 5 MHz), and suitability for analog-to-digital converter buffering, video line driving, and differential signaling in space-constrained systems.

Technical Context

The AD8002ARMZ employs transimpedance linearization circuitry to achieve exceptional video fidelity at low power. Its inverting input presents ~50 Ω impedance, enabling stable gain-independent bandwidth up to 600 MHz when paired with appropriate feedback resistors (e.g., 953 Ω for G = +1).

As a current feedback amplifier, it avoids the gain-bandwidth trade-off of voltage feedback op amps. Its open-loop transresistance ranges from 175 kΩ to 900 kΩ, and its input bias current asymmetry (+IN: ±6 µA typ; −IN: ±25 µA typ) requires careful PCB layout to minimize offset drift.

Key Specifications

Pinout & Package

AD8002ARMZ is housed in an 8-lead MSOP package (3 mm × 3 mm, 0.65 mm pitch), optimized for thermal performance and board space efficiency in portable and high-density designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed current feedback amplifier applications.

Compared with AD8002ARMZ, AD8000ARMZ provides identical per-channel performance in a smaller footprint but doubles component count for dual-channel needs, while LMH6702MA/NOPB trades video-specific linearity for raw speed and bandwidth-making AD8002ARMZ the only option qualified for professional video signal integrity.

Availability

AD8002ARMZ is available at Aetrix Electronics and suitable for professional video line driving, analog-to-digital converter buffering, and differential signal generation requiring stable component supply, industrial temperature operation, and consistent MSOP packaging.

Supply support for AD8002ARMZ 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 AD8002ARMZ belongs to Analog Devices' precision high-speed amplifier product line, engineered specifically for demanding video, instrumentation, and communications applications where bandwidth, linearity, and low power must coexist.

FAQ

What is the maximum operating supply voltage for AD8002ARMZ?

The AD8002ARMZ supports a total supply voltage range of ±3.0 V to ±6.0 V, meaning the absolute maximum across V+ and V− is 12 V. The datasheet specifies an absolute maximum rating of 13.2 V for supply voltage, but operation beyond ±6.0 V risks exceeding safe junction temperature limits and invalidating guaranteed specifications. For reliable long-term use, Analog Devices recommends staying within the ±3.0 V to ±6.0 V operational range specified in the Electrical Characteristics table. The AD8002ARMZ has been characterized and tested under these conditions.

Can AD8002ARMZ drive 50 Ω loads effectively?

Yes, the AD8002ARMZ can drive 50 Ω loads, delivering ±2.7 V output swing at T_J = 25°C and RL = 50 Ω. However, output current capability drops compared to 150 Ω loads due to higher power dissipation-maximum continuous output current remains 70 mA, but thermal derating must be applied per Figure 3 in the datasheet. For sustained 50 Ω operation, ensure ambient temperature stays below 60°C and implement proper PCB copper pour and thermal vias. The AD8002ARMZ is primarily optimized for 75 Ω video loads, but its robust output stage supports 50 Ω RF and instrumentation applications with appropriate layout.

What feedback resistor value is recommended for G = +2 configuration with AD8002ARMZ?

For a noninverting gain of +2, Analog Devices specifies a feedback resistor (R_F) of 681 Ω for both SOIC (R) and MSOP (RM) packages, as confirmed in Table 1 (Dynamic Performance) and Figure 44 (Test Circuit, Gain = +2). This value ensures optimal bandwidth (500 MHz), flatness, and stability. Using 1% tolerance metal-film resistors is strongly recommended to maintain 0.1 dB gain flatness to 60 MHz. Deviations from 681 Ω-especially lower values-risk peaking or oscillation due to parasitic capacitance at the inverting input.

Does AD8002ARMZ support single-supply operation?

Yes, the AD8002ARMZ supports single-supply operation from 6 V to 12 V, as explicitly stated in the General Description. When operated from a single 12 V rail, V− is connected to ground and V+ to 12 V. Input common-mode voltage range extends to ±3.2 V, so level-shifting circuitry or AC-coupled inputs may be required for rail-to-rail signal handling. Quiescent current remains ~10 mA total, and output swing is asymmetric (e.g., 0 V to ~3.1 V with 150 Ω load), but all key specs-including bandwidth and distortion-are preserved per the datasheet's single-supply test conditions.

How does AD8002ARMZ handle capacitive loads?

The AD8002ARMZ is not inherently optimized for direct capacitive load driving; its datasheet recommends adding a small series resistance (R_SERIES) between the output and the capacitive load to maintain stability. Figure 51 provides a lookup: for a 100 pF load, R_SERIES ≈ 15 Ω; for 500 pF, ≈ 30 Ω. Without this resistor, capacitive loading causes peaking or ringing in the step response. The dominant pole introduced by R_SERIES and C_L rolls off high-frequency gain, but preserves settling time integrity. This technique is validated in the "Driving Capacitive Loads" section and should be applied whenever driving ADC input capacitance (>10 pF) or long cables.