OPA827AIDRG4 Equivalent & Substitute Parts

Part Overview

The OPA827AIDRG4 is a J-FET input operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is designed for applications requiring low input bias current and low input offset voltage characteristics typical of J-FET amplifier topologies. The OPA827AIDRG4 is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

OPA827AIDRG4

Texas InstrumentsIn Stock: 1146OPA827AIDRG4 Datasheet

Current PartRFQ

OPA827AIDR

Texas InstrumentsIn Stock: 1186OPA827AIDR Datasheet

MFR RecommendedRFQ

AD627BRZ-R7

Analog Devices Inc.In Stock: 3912AD627BRZ-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA827AIDRG4 is determined by compatibility across the following critical parameters: amplifier topology (J-FET input stage), single-circuit configuration, package form factor (8-SOIC), surface mount capability, and electrical performance specifications including slew rate, gain bandwidth product, input bias current, and supply voltage range.

The OPA827AIDR represents a direct equivalent substitute, maintaining identical electrical specifications and J-FET amplifier topology while differing only in packaging format (Cut Tape and Digi-Reel versus Digi-Reel only). This part is currently active in production status.

The AD627BRZ-R7 represents a functional alternative with significant architectural differences. While housed in the same 8-SOIC package and maintaining surface mount compatibility, this device employs an instrumentation amplifier topology rather than a J-FET input operational amplifier. Electrical performance differs substantially in slew rate (0.06 V/µs versus 28 V/µs), input bias current (2 nA versus 15 pA), and operating temperature range (-40°C to 85°C versus -40°C to 125°C). The AD627BRZ-R7 is suitable only for applications where instrumentation amplifier characteristics and reduced performance specifications are acceptable.

Parameter Comparison

Engineering Selection Recommendations

OPA827AIDR (Primary Substitute)

The OPA827AIDR is the recommended direct substitute for the OPA827AIDRG4. This part maintains identical electrical specifications, J-FET amplifier topology, and operating characteristics. The OPA827AIDR is currently in active production status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements. The only distinction is packaging format; the OPA827AIDR is supplied in Cut Tape and Digi-Reel formats rather than Digi-Reel only. Pin-for-pin compatibility and functional equivalence are complete.

AD627BRZ-R7 (Conditional Substitute)

The AD627BRZ-R7 is suitable only for applications where the architectural shift from J-FET input operational amplifier to instrumentation amplifier topology is acceptable. This substitute is appropriate when:

• Instrumentation amplifier gain and input stage characteristics are compatible with circuit requirements
• Reduced slew rate (0.06 V/µs) does not compromise signal fidelity or bandwidth requirements
• Lower input bias current (2 nA) is beneficial or acceptable
• Operating temperature range limited to -40°C to 85°C meets application specifications
• Lower supply current (60 µA) is advantageous for power-constrained designs

The AD627BRZ-R7 is active in production and ROHS3 compliant. Moisture sensitivity level is superior (MSL 1 versus MSL 2).

Frequently Asked Questions (FAQ)

Q: Can the OPA827AIDR be used as a direct replacement for the OPA827AIDRG4?

A: Yes. The OPA827AIDR is electrically and functionally identical to the OPA827AIDRG4. All electrical parameters, including slew rate, gain bandwidth product, input bias current, and supply voltage range, are identical. The 8-SOIC package and surface mount configuration are unchanged. The only difference is packaging format (Cut Tape and Digi-Reel versus Digi-Reel only). Pin-for-pin compatibility is complete.

Q: What are the key differences between the OPA827AIDR and AD627BRZ-R7?

A: The OPA827AIDR is a J-FET input operational amplifier with 28 V/µs slew rate and 22 MHz gain bandwidth product. The AD627BRZ-R7 is an instrumentation amplifier with 0.06 V/µs slew rate and no specified gain bandwidth product. Input bias current differs significantly (15 pA versus 2 nA). Operating temperature range is reduced on the AD627BRZ-R7 (-40°C to 85°C versus -40°C to 125°C). These devices are not functionally equivalent and substitution requires circuit redesign evaluation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The OPA827AIDR and AD627BRZ-R7 are both ROHS3 compliant and REACH unaffected, matching the compliance status of the OPA827AIDRG4.

Q: What is the moisture sensitivity level difference between substitutes?

A: The OPA827AIDRG4 and OPA827AIDR both have MSL 2 (1 Year) rating. The AD627BRZ-R7 has MSL 1 (Unlimited) rating, indicating superior moisture resistance and longer shelf life without baking requirements.

Q: Can the AD627BRZ-R7 be used in high-speed applications?

A: No. The AD627BRZ-R7 slew rate of 0.06 V/µs is significantly lower than the OPA827AIDRG4 slew rate of 28 V/µs. Applications requiring fast signal transients or high-frequency operation must use the OPA827AIDR.

Q: Is the 8-SOIC package identical across all three parts?

A: Yes. All three parts use the 8-SOIC package with 0.154" (3.90mm) width. Surface mount compatibility and PCB layout are identical. No redesign of printed circuit board footprints is required when substituting between these parts.

Q: What is the supply voltage compatibility range?

A: The OPA827AIDRG4 and OPA827AIDR both operate from 8 V to 36 V supply span. The AD627BRZ-R7 operates from 2.2 V to 36 V, providing lower minimum supply voltage capability. Designs operating below 8 V require the AD627BRZ-R7, but this substitution involves architectural changes.