OPA705PA Equivalent & Substitute Parts

Part Overview

The OPA705PA is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-PDIP through-hole package. This device features rail-to-rail output capability and is designed for applications requiring low-power, single-circuit amplification across a 4V to 12V supply range. The OPA705PA maintains Active product status with 1511 units in current inventory stock.

Substitute parts become necessary when the primary device is unavailable, when supply chain constraints occur, or when application requirements align with alternative devices offering compatible electrical and mechanical specifications. Substitution must maintain functional equivalence across critical parameters including package type, pin configuration, supply voltage range, and output characteristics.

Substiute Parts

OPA705PA

Texas InstrumentsIn Stock: 1567OPA705PA Datasheet

Current PartRFQ

ALD1702PAL

Advanced Linear Devices Inc.In Stock: 811ALD1702PAL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPA705PA is determined by strict alignment across the following critical parameters:

Mandatory Compatibility Criteria:

• Package type: 8-DIP (0.300", 7.62mm) through-hole configuration
• Amplifier classification: General Purpose
• Circuit count: Single circuit (1)
• Output configuration: Rail-to-Rail
• Supply voltage range: Minimum 4V, Maximum 12V (substitute must support the full OPA705PA range or a subset thereof)
• Mounting method: Through Hole
• Regulatory compliance: ROHS3 Compliant and REACH Unaffected status

Performance Parameters (Secondary Consideration): Electrical characteristics including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current per channel are secondary considerations. Substitutes may exhibit different performance values provided they do not degrade circuit functionality within the application's design margins.

Operating Temperature Range: The OPA705PA operates across -40°C to 85°C. Substitute parts with narrower temperature ranges may be acceptable if the application operates within the substitute's specified range.

The ALD1702PAL meets all mandatory compatibility criteria and qualifies as a direct substitute for the OPA705PA.

Parameter Comparison

Engineering Selection Recommendations

OPA705PA (Primary Device)

The OPA705PA is the specified component and remains the first choice when availability permits. This device is manufactured by Texas Instruments, maintains Active product status, and carries full ROHS3 compliance and REACH Unaffected certification. The extended operating temperature range of -40°C to 85°C supports applications across industrial and commercial environments. Current inventory of 1511 units supports immediate procurement.

ALD1702PAL (Qualified Substitute)

The ALD1702PAL manufactured by Advanced Linear Devices Inc. qualifies as a direct substitute based on identical package configuration (8-DIP through-hole), matching amplifier classification (General Purpose, single circuit, rail-to-rail output), and compatible supply voltage minimum (4V). Both devices maintain Active product status with equivalent regulatory compliance (ROHS3 Compliant, REACH Unaffected).

Critical Substitution Constraint:

The ALD1702PAL maximum supply voltage is 10V, compared to the OPA705PA maximum of 12V. Applications requiring operation at supply voltages between 10V and 12V must retain the OPA705PA. For applications operating at 10V or below, the ALD1702PAL provides functional equivalence.

The ALD1702PAL exhibits superior performance characteristics in slew rate (2.8V/µs versus 0.6V/µs) and gain bandwidth product (1.5MHz versus 1MHz), with lower supply current consumption (1.1mA versus 160µA). Operating temperature range is narrower (0°C to 70°C versus -40°C to 85°C); substitution is valid only for applications within this narrower range.

Frequently Asked Questions (FAQ)

Q: Can the ALD1702PAL replace the OPA705PA in all applications?

A: The ALD1702PAL qualifies as a substitute only when both conditions are met: (1) the application supply voltage does not exceed 10V, and (2) the operating temperature range remains within 0°C to 70°C. Applications requiring operation above 10V supply voltage or below 0°C or above 70°C must use the OPA705PA.

Q: Are the pin configurations identical between OPA705PA and ALD1702PAL?

A: Both devices use the 8-DIP (0.300", 7.62mm) through-hole package. Pin-to-pin compatibility is confirmed by the identical package specification. PCB layout modifications are not required for substitution.

Q: What are the key performance differences between these devices?

A: The ALD1702PAL provides faster slew rate (2.8V/µs versus 0.6V/µs) and higher gain bandwidth product (1.5MHz versus 1MHz), resulting in improved transient response and bandwidth performance. The ALD1702PAL consumes significantly less supply current (1.1mA versus 160µA). The OPA705PA offers lower input offset voltage (500µV versus 4.5mV) and extended operating temperature range (-40°C to 85°C versus 0°C to 70°C).

Q: Are both devices RoHS and REACH compliant?

A: Yes. Both the OPA705PA and ALD1702PAL are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic component procurement.

Q: What is the maximum supply voltage for each device?

A: The OPA705PA supports supply voltages up to 12V. The ALD1702PAL supports supply voltages up to 10V. This difference is the primary constraint limiting substitution eligibility.

Q: Can I use the OPA705PA as a substitute for the ALD1702PAL?

A: Yes. The OPA705PA can substitute for the ALD1702PAL in all applications where the ALD1702PAL is specified, provided the application can tolerate the OPA705PA's lower slew rate and gain bandwidth product, and higher supply current consumption.

Q: What is the current inventory status for each part?

A: The OPA705PA has 1511 units in stock. The ALD1702PAL has 724 units in stock. Both devices maintain Active product status with current availability.