Analog Devices Inc. AD8051AR-REEL

Overview

AD8051AR-REEL from Analog Devices is a single-channel, rail-to-rail output voltage feedback amplifier optimized for high-speed video and analog signal conditioning. It delivers 110 MHz −3 dB bandwidth (G = +1), 145 V/μs slew rate, and 50 ns settling time to 0.1%, operating from a single 5 V supply with output swing within 25 mV of either rail. It is used in composite video line drivers, CCD imaging front-ends, and ADC input buffers.

For engineers reviewing the AD8051AR-REEL datasheet, AD8051AR-REEL pinout, AD8051AR-REEL application, or AD8051AR-REEL equivalent, key selection criteria include rail-to-rail output swing under 150 Ω load, differential gain/phase error ≤ 0.03%/0.03° at NTSC frequencies, capacitive load drive up to 50 pF, low THD (−80 dBc @ 1 MHz), and SOT-23-5 package compatibility with space-constrained portable designs.

Technical Context

The AD8051AR-REEL employs a differential-input, complementary common-emitter output stage fabricated on Analog Devices' XFCB process, enabling high f_T transistors and dielectric isolation for low distortion and latch-up immunity. Its input stage accepts voltages from −0.2 V below the negative rail to within 1 V of the positive rail without phase reversal.

Output stage biasing uses dedicated current sources (I₅, I₈) and a common-mode feedback loop to sustain 45 mA output drive while maintaining rail-to-rail swing. The amplifier achieves stable unity-gain operation driving ≥50 pF capacitive loads and meets broadcast-grade video specs including 0.1 dB gain flatness to 20 MHz and <0.03° differential phase error.

Key Specifications

Pinout & Package

SOT-23-5 (RJ) package: 5-pin, ultra-small outline transistor package with exposed pad for thermal performance; footprint compatible with automated placement and reflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, rail-to-rail amplifier applications.

Compared with ADA4807-1ARZ-R7 and LMH6629MA/NOPB, the AD8051AR-REEL uniquely balances 110 MHz bandwidth, rail-to-rail output, 4.4 mA quiescent current, and broadcast-grade video linearity - making it optimal for cost-sensitive, space-constrained video and portable instrumentation where full supply utilization and NTSC compliance are required.

Availability

AD8051AR-REEL is available at Aetrix Electronics and suitable for active filters, analog-to-digital drivers, and consumer video equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for AD8051AR-REEL 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 AD8051AR-REEL belongs to the AD805x family of low-cost, high-speed, rail-to-rail amplifiers designed specifically for video electronics, portable instrumentation, and high-fidelity signal conditioning where speed, linearity, and single-supply operation are critical.

FAQ

What supply voltage range does the AD8051AR-REEL support?

The AD8051AR-REEL operates from a single 3 V to 12 V supply or dual ±3 V to ±5 V supplies. At 5 V single supply, its input common-mode range spans −0.2 V to +4 V, and output swings from 0.025 V to 4.975 V into 10 kΩ - enabling full dynamic range utilization without level-shifting circuitry. This flexibility makes AD8051AR-REEL suitable for both battery-powered portable gear and fixed-line industrial systems.

Does the AD8051AR-REEL support rail-to-rail input operation?

No, the AD8051AR-REEL features rail-to-rail *output* but not rail-to-rail *input*. Its input common-mode voltage range extends 200 mV below the negative rail and to within 1 V of the positive rail (e.g., −0.2 V to +4 V at VS = 5 V). Exceeding this range does not cause phase reversal, but ESD diodes begin conducting beyond ±0.5 V from the rails. For true rail-to-rail input, consider alternatives like the ADA4807-1, though they trade off bandwidth and video linearity.

Can the AD8051AR-REEL drive a 75 Ω video load directly?

The AD8051AR-REEL is not rated for continuous 75 Ω driving at full output swing. Its specified output swing degrades to 0.3 V to 4.625 V into 150 Ω and further to 0.55 V to 4.4 V into 150 Ω at 5 V supply. For 75 Ω video distribution, use a G = +2 configuration with external 75 Ω termination at the load end, as validated in the datasheet's composite video line driver application (Figure 20). Direct 75 Ω source termination risks excessive current and thermal stress beyond 45 mA rating.

What is the thermal performance of the AD8051AR-REEL in SOT-23-5 package?

The AD8051AR-REEL in SOT-23-5 (RJ) package has a junction-to-ambient thermal resistance (θ_JA) of 180°C/W and junction-to-case (θ_JC) of 67°C/W. At 4.4 mA quiescent current and 5 V supply, power dissipation is ~22 mW - resulting in <4°C junction rise in still air. For sustained high-output-current operation (>20 mA), PCB copper pour under the exposed pad is strongly recommended to maintain junction temperature below 125°C across −40°C to +85°C ambient.

Is the AD8051AR-REEL pin-compatible with other members of the AD805x family?

No, the AD8051AR-REEL (SOT-23-5) is not pin-compatible with AD8052 (SOIC-8/MSOP-8) or AD8054 (SOIC-14/TSSOP-14). Its 5-pin SOT-23 layout places −IN, +IN, −VS, VOUT, and +VS on pins 1–5 respectively - a topology distinct from the 8- or 14-pin variants. While electrical specifications are closely aligned across the family, board-level redesign is required when substituting between packages. Always verify pin mapping using Figure 2 (SOT-23-5 top view) in the AD8051/AD8052/AD8054 Rev. K datasheet.