OPA2694IDRG4 Equivalent & Substitute Parts

Part Overview

The OPA2694IDRG4 is a current feedback amplifier integrated circuit manufactured by Texas Instruments, configured as a dual-channel operational amplifier in an 8-SOIC surface mount package. This device is classified as obsolete, indicating that Texas Instruments has discontinued production and support. The obsolete status necessitates identification of active alternative components that maintain electrical and mechanical compatibility for existing designs or new production requirements.

Substiute Parts

OPA2694IDRG4

Texas InstrumentsIn Stock: 1047OPA2694IDRG4 Datasheet

Current PartRFQ

AD8008ARZ

Analog Devices Inc.In Stock: 1680AD8008ARZ Datasheet

MFR RecommendedRFQ

MAX4225ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1382MAX4225ESA+ Datasheet

MFR RecommendedRFQ

MAX4225ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 17341MAX4225ESA+T Datasheet

MFR RecommendedRFQ

MAX4227ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1220MAX4227ESA+ Datasheet

MFR RecommendedRFQ

MAX4227ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1194MAX4227ESA+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA2694IDRG4 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Amplifier Type: Current Feedback
• Number of Circuits: 2 (dual-channel configuration)
• 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 (OPA2694IDRG4 specification)
• -3dB Bandwidth: 1.5 GHz (OPA2694IDRG4 specification)
• Voltage Supply Span: Minimum 7 V, Maximum 12.6 V
• Current - Output / Channel: 70 mA (OPA2694IDRG4 specification)

All identified substitute parts meet the primary substitution criteria. Variations in secondary parameters reflect design trade-offs between slew rate, bandwidth, power consumption, and input offset voltage across the active product portfolio.

Parameter Comparison

Engineering Selection Recommendations

AD8008ARZ (Analog Devices Inc.)

The AD8008ARZ is an active product with full manufacturer support. This device operates within the specified supply voltage range (5 V to 12 V) and maintains the required 8-SOIC package footprint. The slew rate of 1000 V/µs and -3dB bandwidth of 500 MHz are lower than the OPA2694IDRG4, making this substitute suitable for applications where the original device's high-speed performance is not required. The AD8008ARZ provides superior input bias current (4 µA) and reduced supply current (9 mA), offering improved power efficiency. RoHS3 compliance and MSL 1 rating ensure long-term component availability and handling flexibility.

MAX4225ESA+ and MAX4225ESA+T (Analog Devices Inc./Maxim Integrated)

The MAX4225 series represents an intermediate performance option with active product status. Both variants (tube packaging and tape/reel) deliver 1100 V/µs slew rate and 1 GHz -3dB bandwidth, positioning this device between the AD8008ARZ and higher-performance alternatives. The MAX4225 series exhibits the lowest input bias current (2 µA) and supply current (6 mA) among all substitutes, resulting in minimal power consumption. Supply voltage range (5.7 V to 11 V) overlaps with the OPA2694IDRG4 operating window. The MAX4225ESA+T variant offers significantly higher inventory availability (17,320 units) compared to the tube-packaged MAX4225ESA+ (1,314 units), providing supply chain advantages for production quantities.

MAX4227ESA+ and MAX4227ESA+T (Analog Devices Inc./Maxim Integrated)

The MAX4227 series delivers performance characteristics most closely aligned with the OPA2694IDRG4, featuring identical 1700 V/µs slew rate. The -3dB bandwidth of 600 MHz represents a trade-off between the lower-bandwidth AD8008ARZ and higher-bandwidth MAX4225 options. Like the MAX4225 series, the MAX4227 exhibits 2 µA input bias current and 6 mA supply current. Both packaging variants (MAX4227ESA+ in tube and MAX4227ESA+T in tape/reel) maintain full RoHS3 compliance and MSL 1 rating. The MAX4227ESA+T variant provides 1,100 units of inventory availability.

Selection Basis:

All substitute parts satisfy the mandatory substitution criteria: dual-channel current feedback amplifier topology, 8-SOIC surface mount package, -40°C to 85°C operating temperature range, and ROHS3 compliance. Selection among substitutes depends on application-specific requirements for slew rate, bandwidth, power consumption, and supply voltage constraints. The MAX4227 series provides the closest performance match to the obsolete OPA2694IDRG4 when high slew rate is required. The MAX4225 series offers optimal power efficiency. The AD8008ARZ serves applications with relaxed bandwidth requirements and lower cost sensitivity.

Frequently Asked Questions (FAQ)

Q: Can the AD8008ARZ directly replace the OPA2694IDRG4 in all applications?

A: The AD8008ARZ is mechanically and electrically compatible at the package level (8-SOIC) and maintains the same dual-channel current feedback amplifier topology. However, the AD8008ARZ operates at 1000 V/µs slew rate and 500 MHz -3dB bandwidth, compared to the OPA2694IDRG4's 1700 V/µs and 1.5 GHz specifications. Applications requiring the original device's high-speed performance characteristics must evaluate whether the reduced bandwidth and slew rate are acceptable for the specific circuit function.

Q: What is the difference between MAX4225ESA+ and MAX4225ESA+T?

A: Both variants are electrically identical with matching electrical specifications. The primary difference is packaging format: MAX4225ESA+ is supplied in tube packaging, while MAX4225ESA+T is supplied in tape and reel format. The MAX4225ESA+T variant has significantly higher inventory availability (17,320 units versus 1,314 units) and is typically preferred for production quantities. Selection between these variants depends on assembly equipment compatibility and procurement volume requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all identified substitute parts (AD8008ARZ, MAX4225ESA+, MAX4225ESA+T, MAX4227ESA+, MAX4227ESA+T) are ROHS3 compliant. The original OPA2694IDRG4 is also ROHS3 compliant. All parts maintain REACH Unaffected status and carry EAR99 ECCN classification.

Q: What is the Moisture Sensitivity Level (MSL) difference between the OPA2694IDRG4 and substitute parts?

A: The OPA2694IDRG4 carries MSL 2 rating with a 1-year shelf life requirement. All substitute parts carry MSL 1 rating with unlimited shelf life. MSL 1 components provide superior handling flexibility and longer storage capability without requiring baking procedures prior to assembly. This represents an improvement over the original device specification.

Q: Which substitute part has the lowest power consumption?

A: The MAX4225 series (both MAX4225ESA+ and MAX4225ESA+T) and MAX4227 series (both MAX4227ESA+ and MAX4227ESA+T) all operate at 6 mA supply current per dual-channel configuration, compared to the OPA2694IDRG4's 11.6 mA. The AD8008ARZ operates at 9 mA. For power-sensitive applications, the MAX4225 or MAX4227 series are preferred.

Q: Is the supply voltage range compatible across all parts?

A: The OPA2694IDRG4 operates from 7 V to 12.6 V. The AD8008ARZ operates from 5 V to 12 V, providing broader low-voltage capability. The MAX4225 and MAX4227 series operate from 5.7 V to 11 V. Applications requiring operation below 5.7 V must use the AD8008ARZ. Applications requiring operation above 12 V are not compatible with any substitute part.

Q: Which substitute part most closely matches the OPA2694IDRG4 performance?

A: The MAX4227 series (MAX4227ESA+ and MAX4227ESA+T) provides the closest performance match, featuring identical 1700 V/µs slew rate. The -3dB bandwidth of 600 MHz is lower than the original 1.5 GHz specification but represents a practical trade-off in the active product portfolio. For applications where the original 1.5 GHz bandwidth is critical, the MAX4225 series at 1 GHz provides the next-closest alternative.

Q: Can these parts be used interchangeably on the same PCB?

A: All substitute parts share the identical 8-SOIC (0.154", 3.90mm Width) package footprint and pin configuration, enabling direct PCB-level substitution without layout modifications. However, circuit performance characteristics will vary based on the selected substitute's electrical specifications. Circuit validation is necessary to confirm that the substitute part's electrical characteristics are appropriate for the intended application function.