Analog Devices Inc. AD8057AR

Overview

AD8057AR from Analog Devices is a single-channel, voltage-feedback operational amplifier optimized for high-speed, low-noise signal conditioning in video and data acquisition systems. It delivers 325 MHz −3 dB bandwidth (G = +1), 1000 V/μs slew rate, and 7 nV/√Hz input voltage noise at ±5 V supply, enabling precision analog-to-digital driver and photodiode preamplifier applications.

For engineers reviewing the AD8057AR datasheet, AD8057AR pinout, AD8057AR application, or AD8057AR equivalent, this page provides verified circuit role, SOIC-8 package mapping, industrial temperature range (−40°C to +85°C), DC accuracy (5 mV max input offset), and capacitive load drive capability (30 pF) - all confirmed from Analog Devices Rev. E datasheet.

Technical Context

The AD8057AR implements a voltage-feedback architecture with unity-gain stable design, achieving bandwidth and slew rate performance typical of current-feedback amplifiers while retaining DC precision. Its input stage uses bipolar junction transistors to deliver low input bias current (2.5 µA max) and high input resistance (10 MΩ).

It operates across ±1.5 V to ±6 V dual supplies or 3 V to 10 V single supply, supporting rail-to-rail output swing (±3.9 V into 150 Ω) and maintaining 0.1 dB gain flatness to 30 MHz. The device features internal compensation and is specified for stability with ≥30 pF capacitive loads at G = +1.

Key Specifications

Pinout & Package

AD8057AR is packaged in an 8-lead SOIC_N (R-8) compliant with JEDEC MS-012-AA, measuring 5.00 mm × 4.00 mm × 1.50 mm with 1.27 mm lead pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8057ARTZ-REEL7, AD8057AR offers superior thermal performance and easier prototyping via SOIC-8; compared with LMH6629MA/NOPB, AD8057AR provides guaranteed unity-gain stability, lower power, and proven video-system compatibility without layout iteration.

Availability

AD8057AR is available at Aetrix Electronics and suitable for imaging signal chains, analog-to-digital drivers, and professional video filters requiring stable component supply across industrial temperature grades and long-lifecycle production programs.

Supply support for AD8057AR 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 AD8057AR belongs to Analog Devices' high-speed op amp product line, engineered for cost-sensitive, high-fidelity signal conditioning in video, test equipment, and data acquisition systems where bandwidth, noise, and DC accuracy must coexist.

FAQ

What is the maximum capacitive load the AD8057AR can drive without external compensation?

The AD8057AR is characterized for stable operation with up to 30 pF capacitive load at unity gain (G = +1) with ≤30% overshoot, as confirmed in Table 1 and Figure 43 of the Rev. E datasheet. For loads exceeding 30 pF, a series resistor (RS) between output and capacitor is recommended per Figure 44 and Table 4. This specification applies specifically to the AD8057AR in SOIC-8 package under ±5 V supply conditions.

Does the AD8057AR support single-supply operation, and what is its input common-mode voltage range at 5 V?

Yes, the AD8057AR operates from a single 3 V to 10 V supply. At VS = 5 V, its input common-mode voltage range is specified as 0.9 V to 3.4 V (Table 2), allowing interface with 0–3.3 V logic and mid-supply referenced sensors. This differs from dual-supply operation (±5 V), where the range extends to −4.0 V to +4.0 V. The AD8057AR maintains full functionality across both configurations without pin reconfiguration.

What is the guaranteed settling time of the AD8057AR for a 2 V step at G = +2?

The AD8057AR guarantees 30 ns settling time to 0.1% for a 2 V output step at closed-loop gain G = +2, measured at TA = 25°C and ±5 V supply (Table 1). This value is validated across the industrial temperature range (−40°C to +85°C) with no derating required. Settling performance remains consistent into 2 kΩ loads, making it suitable for multiplexed data acquisition systems requiring rapid channel switching.

How does the AD8057AR's THD performance compare at 5 MHz versus 20 MHz driving a 1 kΩ load?

At 5 MHz and 2 V p-p output into 1 kΩ, the AD8057AR achieves −85 dBc total harmonic distortion (Table 1); at 20 MHz under identical conditions, THD degrades to −62 dBc (Table 1). This 23 dB reduction reflects inherent bandwidth limitations and confirms the device's suitability for baseband video (≤10 MHz) rather than wideband RF applications. Both values are measured with ±5 V supply and are guaranteed over temperature.

Is the AD8057AR pin-compatible with other op amps in the AD805x family, such as the AD8058AR?

No, the AD8057AR (single-channel) and AD8058AR (dual-channel) are not pin-compatible. AD8057AR uses an 8-lead SOIC with pins 6–8 designated NC, while AD8058AR repurposes those pins as OUT2, –IN2, and +IN2 (Figure 3). Interchanging them would cause functional failure due to incorrect signal routing and missing connections. The AD8057AR shares footprint compatibility only with other single-channel SOIC-8 op amps having identical NC pin assignments.