OPA694IDRG4 Equivalent & Substitute Parts

Part Overview

The OPA694IDRG4 is a Current Feedback Amplifier (CFA) manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as Obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The OPA694IDRG4 delivers high-speed amplification with a 1.5 GHz bandwidth and 1700 V/µs slew rate, suitable for applications requiring broadband signal conditioning and high-frequency amplification.

Substiute Parts

OPA694IDRG4

Texas InstrumentsIn Stock: 1121OPA694IDRG4 Datasheet

Current PartRFQ

OPA694IDR

Texas InstrumentsIn Stock: 7304OPA694IDR Datasheet

MFR RecommendedRFQ

MAX4224ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1156MAX4224ESA+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA694IDRG4 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Amplifier Type: Current Feedback
• Number of Circuits: 1
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C to 85°C
• RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Parameters:

• Slew Rate: 1700 V/µs (minimum acceptable)
• -3dB Bandwidth: 1.5 GHz (minimum acceptable)
• Current - Output / Channel: 80 mA (minimum acceptable)
• Voltage - Supply Span: 7 V to 12.6 V (operating range)

The OPA694IDR from Texas Instruments is a direct functional equivalent with identical electrical specifications and active product status. The MAX4224ESA+T from Analog Devices Inc./Maxim Integrated provides substitution capability with minor parameter variations within acceptable engineering tolerances for the specified package and amplifier topology.

Parameter Comparison

Engineering Selection Recommendations

OPA694IDR (Primary Substitute): The OPA694IDR is the recommended substitute for the obsolete OPA694IDRG4. This part maintains identical electrical specifications, identical package configuration, and active product status from Texas Instruments. The OPA694IDR provides direct functional replacement with no design modifications required. ROHS3 compliance and MSL rating of 2 (1 Year) are maintained.

MAX4224ESA+T (Alternative Substitute): The MAX4224ESA+T from Analog Devices Inc./Maxim Integrated provides substitution capability with the following considerations: The -3dB bandwidth is specified at 0.6 GHz, which is lower than the OPA694IDRG4 specification of 1.5 GHz. The voltage supply span minimum is 5.7 V, which is lower than the OPA694IDRG4 minimum of 7 V. The MAX4224ESA+T offers improved moisture sensitivity (MSL 1, Unlimited) and is supplied in Tape & Reel packaging. This part is suitable for applications where the reduced bandwidth specification does not impact system performance requirements.

Both substitute parts maintain the 8-SOIC surface mount package, single-circuit current feedback amplifier topology, 1700 V/µs slew rate, 80 mA output current capability, and -40°C to 85°C operating temperature range. Selection between OPA694IDR and MAX4224ESA+T depends on specific bandwidth and supply voltage requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can the OPA694IDR directly replace the OPA694IDRG4 without PCB modifications?

A: Yes. The OPA694IDR is a direct functional equivalent with identical electrical specifications and 8-SOIC package configuration. No PCB layout modifications are required for substitution.

Q: What is the primary difference between OPA694IDR and MAX4224ESA+T?

A: The OPA694IDR maintains the full 1.5 GHz bandwidth specification of the original OPA694IDRG4. The MAX4224ESA+T has a -3dB bandwidth of 0.6 GHz. Additionally, the MAX4224ESA+T has a lower minimum supply voltage (5.7 V vs. 7 V). Selection depends on whether the application requires the higher bandwidth performance.

Q: Are all three parts (OPA694IDRG4, OPA694IDR, MAX4224ESA+T) pin-compatible?

A: Yes. All three parts use the 8-SOIC package with identical pinout configuration, enabling direct socket substitution.

Q: What is the difference in packaging between OPA694IDR and MAX4224ESA+T?

A: The OPA694IDR is supplied in standard packaging. The MAX4224ESA+T is supplied in Tape & Reel (TR) format, which is suitable for automated assembly processes.

Q: Are there any compliance or certification differences between the substitute parts?

A: All three parts are ROHS3 compliant and REACH unaffected. The MAX4224ESA+T has an improved Moisture Sensitivity Level (MSL 1, Unlimited) compared to the OPA694IDRG4 and OPA694IDR (MSL 2, 1 Year).

Q: Which substitute part should be selected for new designs?

A: The OPA694IDR is the recommended choice for new designs requiring direct electrical equivalence to the OPA694IDRG4. The MAX4224ESA+T is suitable for applications where the 0.6 GHz bandwidth specification is acceptable and improved moisture handling is beneficial.

Q: Is the OPA694IDRG4 still available for purchase?

A: The OPA694IDRG4 is classified as Obsolete. The OPA694IDR (Active status) is the recommended replacement for ongoing production and new designs.