OPA698IDG4 Equivalent & Substitute Parts

Part Overview

The OPA698IDG4 is a voltage feedback amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device features a single amplification circuit with a slew rate of 1100V/µs and gain bandwidth product of 250 MHz, designed for high-speed signal conditioning applications. The OPA698IDG4 is classified as obsolete, necessitating identification of active equivalent components for new designs and production continuity. Substitute parts must maintain functional compatibility through equivalent electrical performance and identical mechanical packaging specifications.

Substiute Parts

OPA698IDG4

Texas InstrumentsIn Stock: 953OPA698IDG4 Datasheet

Current PartRFQ

AD8036ARZ-REEL7

Analog Devices Inc.In Stock: 3261AD8036ARZ-REEL7 Datasheet

MFR RecommendedRFQ

AD8037ARZ

Analog Devices Inc.In Stock: 4361AD8037ARZ Datasheet

MFR RecommendedRFQ

AD8037ARZ-REEL

Analog Devices Inc.In Stock: 21946AD8037ARZ-REEL Datasheet

MFR RecommendedRFQ

AD8037SRZ-EP

Analog Devices Inc.In Stock: 1150AD8037SRZ-EP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA698IDG4 is determined by strict adherence to the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Amplifier Type: Voltage Feedback (required match)
• Number of Circuits: 1 (required match)
• Package / Case: 8-SOIC (0.154", 3.90mm Width) (required match)
• Mounting Type: Surface Mount (required match)
• Operating Temperature Range: Minimum -40°C, Maximum 85°C or wider
• Voltage - Supply Span: Minimum 5V to 6V, Maximum 12V (overlapping range required)
• RoHS Status: ROHS3 Compliant (required match)

Electrical Performance Parameters for Substitution: Substitute parts must maintain electrical characteristics within the operational envelope defined by the OPA698IDG4. Key parameters include slew rate (minimum 1100V/µs), gain bandwidth product (minimum 250 MHz), -3dB bandwidth (minimum 450 MHz), input bias current (maximum 3µA to 4µA), input offset voltage (maximum 2mV), and output current capability (minimum 70mA per channel).

All identified substitute parts meet these criteria and are classified as active products with current manufacturing status.

Parameter Comparison

Engineering Selection Recommendations

AD8036ARZ-REEL7 (Analog Devices Inc.) This substitute provides active product status with ROHS3 compliance and improved moisture sensitivity rating (MSL 1). The slew rate of 1200V/µs exceeds the OPA698IDG4 minimum requirement. The -3dB bandwidth of 240 MHz is lower than the original specification; applications requiring the full 450 MHz bandwidth may experience performance degradation. Supply current is elevated at 20.5mA compared to 15.5mA. Output current capability is reduced to 70mA per channel versus 120mA. Minimum supply voltage requirement increases to 6V. Tape & Reel packaging supports high-volume production environments.

AD8037ARZ (Analog Devices Inc.) This substitute offers active product status with superior electrical performance. Slew rate of 1500V/µs and -3dB bandwidth of 270 MHz both exceed OPA698IDG4 specifications. Input bias current matches at 3µA. Supply current of 18.5mA is moderately elevated. Output current is reduced to 70mA per channel. Minimum supply voltage increases to 6V. Tube packaging is suitable for lower-volume applications. MSL rating of 1 (Unlimited) provides superior moisture protection. Operating temperature range matches the original specification.

AD8037ARZ-REEL (Analog Devices Inc.) This substitute is functionally identical to AD8037ARZ with Tape & Reel packaging for production environments. Electrical specifications include 1500V/µs slew rate and 270 MHz -3dB bandwidth. Input bias current of 3µA matches the original. Supply current of 18.5mA and output current of 70mA per channel are consistent with the AD8037ARZ variant. Minimum supply voltage of 6V and MSL rating of 1 (Unlimited) apply. Highest inventory availability at 21,836 pieces supports supply chain continuity.

AD8037SRZ-EP (Analog Devices Inc.) This substitute provides extended operating temperature range of -55°C to 105°C, exceeding the OPA698IDG4 specification of -40°C to 85°C. Electrical performance is identical to other AD8037 variants with 1500V/µs slew rate and 270 MHz -3dB bandwidth. Input bias current of 3µA and input offset voltage of 2mV match the original. Supply current of 18.5mA and output current of 70mA per channel apply. Minimum supply voltage of 6V and MSL rating of 1 (Unlimited) are maintained. The "-EP" designation indicates enhanced product qualification. Tube packaging is specified. This variant is suitable for applications requiring extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Why is the OPA698IDG4 being discontinued? A: The OPA698IDG4 is classified as obsolete by Texas Instruments. Substitute parts from Analog Devices Inc. provide equivalent functionality with active manufacturing status and improved reliability characteristics.

Q: Can I directly replace OPA698IDG4 with any of the listed substitutes? A: All listed substitutes are pin-compatible and functionally equivalent within the 8-SOIC package. However, circuit performance may vary due to differences in slew rate, bandwidth, and output current capability. Design verification is required for applications with stringent performance requirements.

Q: What is the key difference between AD8036ARZ-REEL7 and AD8037ARZ variants? A: The AD8036ARZ-REEL7 provides a slew rate of 1200V/µs and -3dB bandwidth of 240 MHz. The AD8037ARZ and AD8037ARZ-REEL variants provide superior performance with 1500V/µs slew rate and 270 MHz -3dB bandwidth. Selection depends on application bandwidth requirements.

Q: Does the minimum supply voltage change affect my circuit design? A: The OPA698IDG4 operates with a minimum supply voltage of 5V. All substitute parts require a minimum of 6V. Circuits designed for 5V single-supply operation must be redesigned or alternative substitutes must be identified.

Q: What is the significance of the "-EP" designation in AD8037SRZ-EP? A: The "-EP" designation indicates enhanced product qualification with extended operating temperature range (-55°C to 105°C) compared to standard variants (-40°C to 85°C). This variant is suitable for military, aerospace, and extreme environment applications.

Q: How do packaging options (Tube vs. Tape & Reel) affect substitution? A: Packaging affects supply chain logistics and production handling. Tube packaging (AD8037ARZ, AD8037SRZ-EP) is suitable for lower-volume or manual assembly environments. Tape & Reel packaging (AD8036ARZ-REEL7, AD8037ARZ-REEL) supports automated pick-and-place assembly for high-volume production. Electrical performance is identical regardless of packaging format.

Q: Why is output current reduced in substitute parts compared to the OPA698IDG4? A: The OPA698IDG4 provides 120mA output current per channel, while substitute parts provide 70mA. Applications requiring the full 120mA output current capability must verify that substitute parts meet load requirements or identify alternative components.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the OPA698IDG4.

Q: What is Moisture Sensitivity Level (MSL) and why does it matter? A: MSL rating indicates the maximum time a component can be stored in ambient conditions before requiring baking prior to reflow soldering. The OPA698IDG4 has MSL 2 (1 Year), while all substitutes have MSL 1 (Unlimited), providing superior moisture protection and extended shelf life.