OPA842IDR Equivalent & Substitute Parts

Part Overview

The OPA842IDR is a voltage feedback amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This single-circuit operational amplifier is designed for high-speed signal conditioning applications requiring moderate bandwidth and slew rate performance. The device is currently in active production status with 3695 units in stock. Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters while maintaining compatibility with the 8-SOIC package footprint and operating temperature range of -40°C to 85°C.

Substiute Parts

OPA842IDR

Texas InstrumentsIn Stock: 3775OPA842IDR Datasheet

Current PartRFQ

AD9631ARZ

Analog Devices Inc.In Stock: 5008AD9631ARZ Datasheet

MFR RecommendedRFQ

AD9631ARZ-REEL7

Analog Devices Inc.In Stock: 18346AD9631ARZ-REEL7 Datasheet

MFR RecommendedRFQ

AD9632ARZ

Analog Devices Inc.In Stock: 3282AD9632ARZ Datasheet

MFR RecommendedRFQ

AD9632ARZ-REEL7

Analog Devices Inc.In Stock: 17139AD9632ARZ-REEL7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OPA842IDR are qualified based on the following criteria:

Mechanical Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) package with surface mount technology to ensure PCB footprint compatibility.

Functional Classification: All parts must be single-circuit voltage feedback amplifiers operating within the -40°C to 85°C temperature range.

Electrical Parameter Alignment: Substitute parts must operate within the supply voltage range of 6V to 12V minimum and maximum, encompassing the OPA842IDR specification of 10V to 12V. Input bias current, input offset voltage, slew rate, and output current capability are evaluated for application suitability within the specified operating conditions.

Compliance Standards: All substitute parts must maintain ROHS3 compliance and REACH unaffected status, consistent with the original part specification.

The identified substitute parts are Analog Devices Inc. devices: AD9631ARZ, AD9631ARZ-REEL7, AD9632ARZ, and AD9632ARZ-REEL7. These devices share identical package geometry and functional classification while offering enhanced electrical performance characteristics in specific parameters.

Parameter Comparison

Engineering Selection Recommendations

Packaging Format Consideration: The OPA842IDR is supplied in Tube packaging. Substitute parts are available in two packaging formats: Tube (AD9631ARZ, AD9632ARZ) and Cut Tape with Digi-Reel (AD9631ARZ-REEL7, AD9632ARZ-REEL7). Selection between tube and reel formats depends on assembly process requirements and volume handling procedures.

Supply Voltage Compatibility: The OPA842IDR requires a minimum supply voltage of 10V. All substitute parts operate at a minimum of 6V, providing broader supply voltage flexibility. Applications constrained to the 10V to 12V range remain compatible with all substitute options.

Output Current Capability: The OPA842IDR provides 100mA output current per channel. Substitute parts provide 70mA output current. Applications requiring the full 100mA output capability cannot use these substitutes.

Input Bias Current: The OPA842IDR specifies 20µA input bias current. All substitute parts specify 2µA input bias current, representing a 10-fold reduction. This improvement benefits high-impedance input applications.

Compliance and Regulatory Status: All parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels differ: OPA842IDR is MSL 2 (1 Year), while all Analog Devices substitutes are MSL 1 (Unlimited), indicating superior moisture tolerance for storage and handling.

Product Status and Availability: All parts maintain active production status. Substitute parts show higher inventory levels, particularly the reel-packaged variants (AD9631ARZ-REEL7 with 18321 units and AD9632ARZ-REEL7 with 17070 units).

Frequently Asked Questions (FAQ)

Q: Can AD9631ARZ and AD9632ARZ be used interchangeably with OPA842IDR?

A: Both Analog Devices parts are mechanically compatible in the 8-SOIC package and operate within the required temperature range. However, output current capability differs: OPA842IDR provides 100mA while both AD963x devices provide 70mA. Selection depends on output current requirements of the specific application.

Q: What is the difference between AD9631ARZ and AD9632ARZ?

A: Both parts are single-circuit voltage feedback amplifiers in 8-SOIC packages with identical supply voltage ranges and operating temperatures. AD9631ARZ provides 1300V/µs slew rate and 320MHz bandwidth. AD9632ARZ provides 1500V/µs slew rate and 250MHz bandwidth. AD9632ARZ also specifies lower input offset voltage (2mV versus 3mV) and lower supply current (16mA versus 17mA).

Q: What is the difference between AD9631ARZ and AD9631ARZ-REEL7?

A: These parts are electrically and functionally identical. The difference is packaging format: AD9631ARZ is supplied in Tube packaging, while AD9631ARZ-REEL7 is supplied in Cut Tape with Digi-Reel format. Electrical specifications, performance characteristics, and compliance status are identical. Selection depends on assembly process requirements.

Q: Are the substitute parts pin-compatible with OPA842IDR?

A: All substitute parts use the 8-SOIC package with 0.154" width and 3.90mm width specification. The 8-SOIC package defines identical pin count and spacing. Pin-level functional compatibility must be verified against specific application schematics and pinout diagrams.

Q: What does MSL 2 (1 Year) versus MSL 1 (Unlimited) mean for component handling?

A: Moisture Sensitivity Level (MSL) indicates moisture absorption characteristics. OPA842IDR with MSL 2 (1 Year) requires reflow processing within one year of package opening under controlled humidity conditions. Analog Devices substitutes with MSL 1 (Unlimited) have superior moisture tolerance and do not have time-based reflow restrictions, providing greater flexibility in manufacturing environments.

Q: Can I substitute OPA842IDR in an existing design without circuit modifications?

A: Mechanical and thermal compatibility is established through identical 8-SOIC packaging and operating temperature range. However, electrical parameter differences exist: output current (100mA versus 70mA), input bias current (20µA versus 2µA), and bandwidth characteristics differ. Circuit-level compatibility assessment is required based on specific application requirements.

Q: Which substitute part offers the best overall performance?

A: Performance depends on application requirements. AD9632ARZ and AD9632ARZ-REEL7 provide the highest slew rate (1500V/µs), lowest input offset voltage (2mV), and lowest supply current (16mA). AD9631ARZ and AD9631ARZ-REEL7 provide higher bandwidth (320MHz). Selection should be based on specific application performance criteria.