AD623BR Equivalent & Substitute Parts

Part Overview

The AD623BR is an instrumentation amplifier manufactured by Analog Devices Inc., designed for single-circuit rail-to-rail applications in 8-SOIC surface mount packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The AD623BR operates across a 2.7V to 12V supply range with low input bias current (17 nA) and minimal input offset voltage (25 µV), suitable for precision measurement and signal conditioning applications.

Substiute Parts

AD623BR

Analog Devices Inc.In Stock: 1727AD623BR Datasheet

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AD623BRZ

Analog Devices Inc.In Stock: 1895AD623BRZ Datasheet

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AD8226BRZ

Analog Devices Inc.In Stock: 3085AD8226BRZ Datasheet

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TLE2142AIDR

Texas InstrumentsIn Stock: 20110TLE2142AIDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the AD623BR is determined by functional equivalence across the following critical parameters: amplifier type (instrumentation), number of circuits (1), output type (rail-to-rail), package format (8-SOIC), mounting type (surface mount), and electrical operating ranges (supply voltage, temperature, and bias characteristics).

Two substitution categories are identified:

Direct Equivalent: Parts maintaining identical electrical specifications and amplifier classification, differing only in product status or packaging format.

Functional Substitute: Parts with enhanced or modified electrical specifications that remain compatible within the same application class, provided the design accommodates parameter differences.

The following parameters establish substitution validity:

• Amplifier Type: Instrumentation
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Output Type: Rail-to-Rail
• Supply Voltage Range: Minimum 2.7V, Maximum ≥12V
• Operating Temperature Range: Minimum ≤-40°C, Maximum ≥85°C

Parameter Comparison

Engineering Selection Recommendations

AD623BRZ (Direct Equivalent - Recommended Primary Substitute)

The AD623BRZ is the direct equivalent to the AD623BR, maintaining identical electrical specifications across all critical parameters: instrumentation amplifier topology, single circuit configuration, 0.3V/µs slew rate, 800 kHz bandwidth, 17 nA input bias current, and 25 µV input offset voltage. The primary distinction is product status: AD623BRZ is active, ensuring long-term availability and supply chain continuity. Both devices operate within the 2.7V to 12V supply range and -40°C to 85°C temperature window. The AD623BRZ is packaged in tube format and is ROHS3 compliant, meeting modern regulatory requirements. This part provides direct pin-for-pin and functional compatibility with no design modifications required.

AD8226BRZ (Functional Substitute - Enhanced Performance)

The AD8226BRZ is a functional substitute offering enhanced electrical performance within the instrumentation amplifier category. This device maintains the same 8-SOIC package and single-circuit configuration but provides doubled slew rate (0.6V/µs), increased bandwidth (1.5 MHz), and extended supply voltage range (2.2V to 36V) and operating temperature range (-40°C to 125°C). Input bias current increases marginally to 20 nA, and input offset voltage doubles to 50 µV. Supply current is slightly reduced to 350 µA. The AD8226BRZ is suitable for applications requiring higher bandwidth or extended operating conditions, provided the design accommodates the modified input characteristics. ROHS3 compliance and active product status ensure regulatory alignment and availability.

TLE2142AIDR (Functional Substitute - Limited Compatibility)

The TLE2142AIDR is a general-purpose amplifier manufactured by Texas Instruments, differing fundamentally from the AD623BR in amplifier classification (general purpose versus instrumentation) and circuit count (2 circuits versus 1). While packaged in 8-SOIC format with rail-to-rail output, this device exhibits significantly different electrical characteristics: 45V/µs slew rate, 5.9 MHz gain-bandwidth product, 700 nA input bias current, and 275 µV input offset voltage. Supply current is substantially higher at 6.9 mA per channel. The TLE2142AIDR operates across 4V to 44V supply range and -40°C to 105°C temperature window. This part is suitable only for applications where the enhanced performance parameters and dual-circuit configuration provide functional benefit, and where the higher input bias current and offset voltage are acceptable. ROHS3 compliance and active status are confirmed.

Frequently Asked Questions (FAQ)

Q: Can AD623BRZ be used as a direct replacement for AD623BR without circuit modifications?

A: Yes. The AD623BRZ is electrically and functionally identical to the AD623BR across all specified parameters. Pin configuration, electrical characteristics, and operating ranges are equivalent. No circuit modifications are required for direct substitution.

Q: What are the key differences between AD623BR and AD8226BRZ?

A: Both are instrumentation amplifiers in 8-SOIC packaging, but AD8226BRZ offers enhanced performance: doubled slew rate (0.6V/µs vs. 0.3V/µs), increased bandwidth (1.5 MHz vs. 800 kHz), extended supply voltage range (2.2V–36V vs. 2.7V–12V), and wider operating temperature range (-40°C to 125°C vs. -40°C to 85°C). Input bias current and offset voltage are slightly higher. These differences require design evaluation for compatibility.

Q: Is TLE2142AIDR suitable for direct replacement of AD623BR?

A: No. TLE2142AIDR is a general-purpose amplifier with two circuits, whereas AD623BR is a single-circuit instrumentation amplifier. While both are packaged in 8-SOIC format, the amplifier classification, circuit count, and electrical characteristics differ significantly. TLE2142AIDR is suitable only for applications where dual-circuit general-purpose amplification meets functional requirements and where higher input bias current (700 nA) and offset voltage (275 µV) are acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: AD623BRZ and AD8226BRZ are confirmed ROHS3 compliant. TLE2142AIDR is also ROHS3 compliant. The original AD623BR does not specify RoHS status. All substitute parts meet modern regulatory requirements for hazardous substance restrictions.

Q: What is the moisture sensitivity level for these parts?

A: All parts listed—AD623BR, AD623BRZ, AD8226BRZ, and TLE2142AIDR—carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can AD8226BRZ operate at the same supply voltages as AD623BR?

A: Yes. AD8226BRZ operates across 2.2V to 36V, which encompasses the AD623BR range of 2.7V to 12V. However, the extended upper limit (36V vs. 12V) requires verification that circuit design and connected components are rated for the higher voltage capability if utilized.

Q: What is the primary reason to substitute AD623BR?

A: AD623BR is classified as obsolete, making long-term procurement and supply chain continuity uncertain. AD623BRZ provides identical functionality with active product status, ensuring availability and regulatory compliance for new designs and production continuity.

Q: Are these parts available in different packaging formats?

A: All substitute parts are specified in 8-SOIC surface mount package format, matching the AD623BR package. AD623BRZ is supplied in tube packaging, while TLE2142AIDR is available in cut tape and Digi-Reel formats. Package format does not affect electrical compatibility.