AD8051AR Equivalent & Substitute Parts

Part Overview

The AD8051AR is a voltage feedback amplifier manufactured by Analog Devices Inc., designed for linear amplification applications requiring rail-to-rail output capability. This device integrates one amplifier circuit in an 8-SOIC surface mount package and operates across a supply voltage range of 3V to 12V with an operating temperature range of -40°C to 125°C.

The AD8051AR is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this amplifier topology.

Substiute Parts

AD8051AR

Analog Devices Inc.In Stock: 2045AD8051AR Datasheet

Current PartRFQ

AD8051ARZ

Analog Devices Inc.In Stock: 2550AD8051ARZ Datasheet

DirectRFQ

LMH6642MA/NOPB

Texas InstrumentsIn Stock: 1191LMH6642MA/NOPB Datasheet

SimilarRFQ

TSH80IYDT

STMicroelectronicsIn Stock: 15550TSH80IYDT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD8051AR is determined by electrical and mechanical compatibility across the following critical parameters:

Mechanical Compatibility: All substitute parts must use the 8-SOIC surface mount package with identical 0.154" (3.90mm) width to ensure PCB layout compatibility without redesign.

Electrical Compatibility: Substitute parts must support rail-to-rail output operation and accommodate the supply voltage range of 3V to 12V minimum. The amplifier topology (voltage feedback or general purpose) and single-circuit configuration are primary functional requirements.

Performance Parameters: Slew rate, bandwidth, input bias current, input offset voltage, supply current, and output current capacity define the operational envelope. Substitutes with equivalent or superior performance in these parameters maintain functional compatibility.

Environmental and Compliance: Operating temperature range, RoHS compliance status, and moisture sensitivity classification determine suitability for specific application environments.

Parameter Comparison

Engineering Selection Recommendations

AD8051ARZ (Analog Devices Inc.): This part is the direct equivalent to the AD8051AR, sharing identical electrical specifications including slew rate, bandwidth, input bias current, and supply voltage range. The AD8051ARZ is classified as active product status and is ROHS3 compliant, making it the primary substitute for obsolete AD8051AR applications. Packaging is supplied in tube format. This part maintains full functional and pin compatibility with the original design.

LMH6642MA/NOPB (Texas Instruments): This substitute provides rail-to-rail voltage feedback amplification in the same 8-SOIC package. Performance characteristics include higher bandwidth (130 MHz versus 110 MHz), lower input offset voltage (1 mV versus 1.8 mV), and higher output current capability (75 mA versus 45 mA). Supply current is reduced to 2.7 mA. The minimum supply voltage is 2.7V, which is compatible with the 3V minimum of the original design. Operating temperature range is limited to -40°C to 85°C. This part is active and ROHS3 compliant.

TSH80IYDT (STMicroelectronics): This substitute is a general purpose amplifier with rail-to-rail output in the 8-SOIC package. It provides higher output current (55 mA) and lower input offset voltage (0.8 mV). However, slew rate is reduced to 118 V/µs, and input bias current is elevated to 6 µA. The minimum supply voltage requirement is 4.5V, which exceeds the 3V minimum of the original design. Operating temperature range is -40°C to 85°C. This part carries automotive qualification (AEC-Q100) and is ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can the AD8051ARZ be used as a direct replacement for the AD8051AR?

A: Yes. The AD8051ARZ is the active equivalent part from Analog Devices Inc. with identical electrical specifications, package type, and pin configuration. It provides direct functional substitution without circuit modification.

Q: What are the key differences between the AD8051AR and the LMH6642MA/NOPB?

A: Both parts are voltage feedback amplifiers in 8-SOIC packages with rail-to-rail output. The LMH6642MA/NOPB offers higher bandwidth (130 MHz), lower input offset voltage (1 mV), higher output current (75 mA), and lower supply current (2.7 mA). The operating temperature range is limited to -40°C to 85°C compared to -40°C to 125°C for the AD8051AR. The minimum supply voltage is 2.7V, which is compatible with 3V systems.

Q: Is the TSH80IYDT suitable for applications requiring the full -40°C to 125°C temperature range?

A: No. The TSH80IYDT operates only to 85°C maximum. Applications requiring operation above 85°C must use the AD8051ARZ or LMH6642MA/NOPB, both of which support higher temperature ranges.

Q: What is the minimum supply voltage requirement for each substitute?

A: The AD8051ARZ requires 3V minimum, matching the original AD8051AR. The LMH6642MA/NOPB requires 2.7V minimum. The TSH80IYDT requires 4.5V minimum, which is incompatible with 3V supply designs.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the 8-SOIC surface mount package with 0.154" (3.90mm) width, ensuring mechanical compatibility without PCB redesign.

Q: Which substitute part has the lowest supply current consumption?

A: The LMH6642MA/NOPB has the lowest supply current at 2.7 mA, compared to 4.8 mA for the AD8051AR and AD8051ARZ, and 9.8 mA for the TSH80IYDT.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. The AD8051ARZ, LMH6642MA/NOPB, and TSH80IYDT are all ROHS3 compliant. The original AD8051AR does not specify RoHS status.

Q: What is the primary advantage of the TSH80IYDT over other substitutes?

A: The TSH80IYDT provides automotive qualification (AEC-Q100) and the lowest input offset voltage (0.8 mV). However, it requires a minimum 4.5V supply and operates only to 85°C maximum temperature.