OPA656MDREP Equivalent & Substitute Parts

Part Overview

The OPA656MDREP is a voltage feedback amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The OPA656MDREP delivers a gain bandwidth product of 230 MHz with a slew rate of 295 V/µs, operating from a supply voltage span of 8 V to 12 V. Identifying compatible substitutes ensures design continuity and component availability for applications requiring voltage feedback amplification in compact form factors.

Substiute Parts

OPA656MDREP

Texas InstrumentsIn Stock: 1131OPA656MDREP Datasheet

Current PartRFQ

ADA4857-1YRZ

Analog Devices Inc.In Stock: 50304ADA4857-1YRZ Datasheet

MFR RecommendedRFQ

LT1722IS8#PBF

Analog Devices Inc.In Stock: 952LT1722IS8#PBF Datasheet

MFR RecommendedRFQ

MAX4201ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 986MAX4201ESA+ Datasheet

MFR RecommendedRFQ

MAX4430ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 965MAX4430ESA+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA656MDREP is determined by the following critical parameters: amplifier type (voltage feedback), number of circuits (1), package type (8-SOIC surface mount), and electrical performance specifications including slew rate, gain bandwidth product, supply voltage range, and output current capability.

The substitute parts identified are grouped into two categories based on functional compatibility:

Category 1: Direct Voltage Feedback Amplifier Substitutes These parts maintain the voltage feedback amplifier topology and are suitable for applications requiring equivalent or enhanced performance characteristics. Substitutes in this category include ADA4857-1YRZ, LT1722IS8#PBF, and MAX4430ESA+T.

Category 2: Buffer Amplifier Substitute MAX4201ESA+ is classified as a buffer amplifier rather than a voltage feedback amplifier. This part is included in the substitute list but operates under a different amplifier topology and should be evaluated for specific application requirements.

All substitute parts are housed in 8-SOIC surface mount packages, ensuring mechanical and thermal compatibility with the original OPA656MDREP footprint.

Parameter Comparison

Engineering Selection Recommendations

ADA4857-1YRZ is an active product from Analog Devices Inc. with enhanced performance characteristics. This part offers a significantly higher slew rate (2800 V/µs) and -3dB bandwidth (850 MHz) compared to the OPA656MDREP. The ADA4857-1YRZ operates from a lower minimum supply voltage (4.5 V) and features improved moisture sensitivity (MSL 1, Unlimited). This substitute is suitable for applications requiring higher bandwidth and faster transient response while maintaining voltage feedback amplifier topology.

LT1722IS8#PBF is an active product from Analog Devices Inc. with lower power consumption (3.7 mA supply current) and reduced output current capability (50 mA). The gain bandwidth product (200 MHz) is comparable to the OPA656MDREP, while the slew rate (70 V/µs) is significantly lower. This substitute is appropriate for low-power applications where bandwidth and slew rate requirements are less stringent than the original device.

MAX4201ESA+ is an active buffer amplifier from Analog Devices Inc./Maxim Integrated. This part operates under a different amplifier topology (buffer rather than voltage feedback) and features the highest slew rate (4200 V/µs) and -3dB bandwidth (780 MHz) among all substitutes. The supply voltage range (8 V to 11 V) overlaps with the OPA656MDREP. This substitute should be selected only when buffer amplifier functionality is compatible with the application circuit topology.

MAX4430ESA+T is an active voltage feedback amplifier from Analog Devices Inc./Maxim Integrated. This part maintains voltage feedback topology and operates within a narrower supply voltage range (9 V to 11 V). The slew rate (100 V/µs) and -3dB bandwidth (180 MHz) are lower than the OPA656MDREP, making this substitute suitable for applications with reduced performance requirements or where the narrower supply range is acceptable.

All substitute parts are ROHS3 compliant and carry REACH Unaffected status, meeting environmental and regulatory requirements equivalent to or exceeding the original OPA656MDREP.

Frequently Asked Questions (FAQ)

Q1: Can the ADA4857-1YRZ directly replace the OPA656MDREP in all applications?

The ADA4857-1YRZ shares the same 8-SOIC package and voltage feedback amplifier topology as the OPA656MDREP. However, the ADA4857-1YRZ operates from a lower minimum supply voltage (4.5 V versus 8 V) and exhibits significantly higher slew rate and bandwidth. Applications designed for the OPA656MDREP supply voltage range (8 V to 12 V) are compatible with the ADA4857-1YRZ. Circuit performance may differ due to enhanced electrical characteristics; verification of application-specific requirements is necessary.

Q2: What is the primary difference between the MAX4201ESA+ and other substitutes?

The MAX4201ESA+ is classified as a buffer amplifier, whereas the OPA656MDREP and most other substitutes are voltage feedback amplifiers. Buffer amplifiers and voltage feedback amplifiers operate under different circuit topologies and have different input/output impedance characteristics. The MAX4201ESA+ should be selected only when buffer amplifier functionality is required by the application circuit.

Q3: Which substitute offers the lowest power consumption?

The MAX4201ESA+ has the lowest supply current at 2.2 mA, followed by the LT1722IS8#PBF at 3.7 mA. The OPA656MDREP draws 14 mA. Selection based on power consumption should be balanced against bandwidth and slew rate requirements specific to the application.

Q4: Are all substitute parts available in the same package as the OPA656MDREP?

All substitute parts are housed in 8-SOIC surface mount packages with identical physical dimensions (0.154", 3.90mm Width). This ensures mechanical and thermal compatibility with the original OPA656MDREP PCB footprint and thermal management design.

Q5: What is the significance of Moisture Sensitivity Level (MSL) differences?

The OPA656MDREP has MSL 3 (168 Hours), indicating moisture sensitivity requiring controlled storage and handling conditions. All substitute parts have MSL 1 (Unlimited), indicating superior moisture resistance and less stringent storage requirements. This represents an improvement in component reliability and handling flexibility.

Q6: How do supply voltage ranges affect substitution decisions?

The OPA656MDREP operates from 8 V to 12 V. The ADA4857-1YRZ operates from 4.5 V to 10.5 V, the LT1722IS8#PBF from 5 V to 10 V, the MAX4201ESA+ from 8 V to 11 V, and the MAX4430ESA+T from 9 V to 11 V. Applications using supply voltages below 8 V require the ADA4857-1YRZ or LT1722IS8#PBF. Applications using supply voltages above 11 V are limited to the OPA656MDREP or MAX4201ESA+.

Q7: Which substitute is recommended for high-speed applications?

The ADA4857-1YRZ offers the highest slew rate (2800 V/µs) and -3dB bandwidth (850 MHz), making it suitable for high-speed signal processing applications. The MAX4201ESA+ buffer amplifier also provides high slew rate (4200 V/µs) but operates under different circuit topology.

Q8: Are all substitutes ROHS3 compliant?

All substitute parts listed are ROHS3 compliant and REACH Unaffected, meeting environmental and regulatory standards equivalent to the OPA656MDREP.