Analog Devices Inc. AD8036AR

Overview

AD8036AR from Analog Devices is a unity-gain-stable, voltage-feedback clamp amplifier optimized for high-fidelity signal conditioning in ADC buffering and IF/RF signal processing. It delivers 240 MHz small-signal bandwidth, 195 MHz large-signal bandwidth, –72 dBc third-harmonic distortion at 20 MHz (RL = 500 Ω), 3 mV typical clamp error, and 1.5 ns overdrive recovery - enabling precise clamping of fast video, imaging, and communications waveforms.

For engineers reviewing the AD8036AR datasheet, AD8036AR pinout, AD8036AR application, or AD8036AR equivalent, this page provides verified specifications, SOIC-8 package layout, clamp input bandwidth (240 MHz), output swing (±3.9 V), and real-world use cases including broadcast video amplification and full-wave rectification with programmable clamp thresholds.

Technical Context

The AD8036AR implements Analog Devices' patented CLAMPIN™ architecture, where clamp inputs VH and VL function as active signal terminals-not just DC bias points-supporting clamp-level modulation up to 240 MHz. Its voltage-feedback topology maintains 65° phase margin and stable unity-gain operation without external compensation.

Clamp behavior is defined by comparator-controlled current steering between VIN, VH, and VL, with transition softening limited to ±18 mV × gain near threshold edges. Unlike output-clamp amplifiers, AD8036AR preserves low output impedance (<0.3 Ω) and linearity across clamped and unclamped regions.

Key Specifications

Pinout & Package

AD8036AR is housed in an 8-lead SOIC (SO-8) package with standard JEDEC MS-012AC footprint, 1.27 mm lead pitch, and exposed substrate connected to –VS for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clamp amplifier applications.

Compared with AD8037AR and LMH6723MA, the AD8036AR uniquely combines unity-gain stability, native 240 MHz clamp input bandwidth, and sub-3 mV clamp error - making it irreplaceable in precision ADC input protection and video DC restoration where pin-compatible alternatives do not exist.

Availability

AD8036AR is available at Aetrix Electronics and suitable for broadcast video systems, high-speed data acquisition, IF/RF receiver chains, and precision instrumentation requiring stable component supply across extended temperature ranges.

Supply support for AD8036AR 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, serving precision instrumentation, communications, and industrial markets since 1965.

The AD8036AR belongs to Analog Devices' CLAMPIN™ clamp amplifier product line, engineered specifically for applications demanding simultaneous wide bandwidth, ultralow distortion, and programmable output limiting - such as high-resolution ADC drivers and broadcast-grade video signal chains.

FAQ

What is the operating temperature range for the AD8036AR?

The AD8036AR is rated for industrial operation from –40°C to +85°C, as confirmed in the Ordering Guide section of the AD8036/AD8037 datasheet Rev. B. This range applies specifically to the SOIC-packaged AD8036AR variant and is validated across all electrical specifications including clamp accuracy, bandwidth, and distortion performance.

Can the AD8036AR be used in inverting configurations?

The AD8036AR can be configured in inverting mode, but its clamp functionality is disabled in that configuration. The CLAMPIN™ architecture relies on the noninverting input (+IN) as the reference for VH and VL comparators; therefore, clamping only operates reliably in noninverting or unity-gain follower topologies as documented in the Theory of Operation section.

What is the maximum allowable clamp input voltage range for AD8036AR?

The AD8036AR supports a clamp voltage range of ±3.9 V on VH and VL pins, as specified in the "Clamp Voltage Range" row of the Electrical Characteristics table (Rev. B). This range is valid when |VH – VIN| ≤ 6.3 V and |VL – VIN| ≤ 6.3 V, and both VH and VL must be set within the output voltage range (±3.9 V) with VH > VL.

Does AD8036AR require external compensation for unity-gain stability?

No, the AD8036AR is unity-gain stable by design and requires no external compensation components. The datasheet explicitly states "The AD8036 is unity gain stable" and confirms stable operation with 65° phase margin in the Theory of Operation section - verified under RL = 100 Ω load conditions.

What bypass capacitors are required for AD8036AR power supply pins?

The AD8036AR requires a parallel combination of ≥4.7 µF (bulk) and 0.1 µF to 0.01 µF (high-frequency) capacitors on each supply rail (+VS and –VS), as recommended in the Power Supply and Input Clamp Bypassing section. Additionally, 0.1 µF capacitors are mandatory between VH/VL and ground when used with DC clamp levels to maintain stability.