THS4271DR Equivalent & Substitute Parts

Part Overview

The THS4271DR is a voltage feedback amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The THS4271DR delivers high-speed amplification with a 1000V/µs slew rate and 400 MHz gain bandwidth product, suitable for applications requiring precision voltage feedback amplification in compact form factors.

Substiute Parts

THS4271DR

Texas InstrumentsIn Stock: 5827THS4271DR Datasheet

Current PartRFQ

AD8036ARZ

Analog Devices Inc.In Stock: 1915AD8036ARZ Datasheet

MFR RecommendedRFQ

THS4271DGK

Texas InstrumentsIn Stock: 1288THS4271DGK Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS4271DR is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Amplifier Type: Voltage Feedback architecture
• Number of Circuits: Single circuit configuration
• Slew Rate: Minimum 1000V/µs
• Gain Bandwidth Product: Minimum 400 MHz
• -3dB Bandwidth: Minimum 1.4 GHz
• Current - Input Bias: Maximum 6 µA
• Voltage - Input Offset: Maximum 5 mV
• Current - Supply: Maximum 22 mA
• Voltage - Supply Span: 5V to 15V operating range
• Operating Temperature: -40°C to 85°C

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Package Configuration: 8-pin SOIC or equivalent footprint compatibility
• Pin Count: 8 pins

Substitute parts must maintain or exceed electrical performance specifications while supporting the same supply voltage range and operating temperature window. Package variations are permitted when pin-compatible footprints are available.

Parameter Comparison

Engineering Selection Recommendations

THS4271DGK (Texas Instruments)

The THS4271DGK is the primary substitute for the obsolete THS4271DR. Both devices share identical electrical specifications including 1000V/µs slew rate, 400 MHz gain bandwidth product, and 1.4 GHz -3dB bandwidth. The THS4271DGK maintains the same supply voltage range (5V to 15V) and operating temperature window (-40°C to 85°C). The primary difference is the package format: THS4271DGK uses 8-TSSOP/8-MSOP (0.118", 3.00mm Width) versus the original 8-SOIC (0.154", 3.90mm Width). Both packages are surface mount with 8-pin configurations. The THS4271DGK holds active product status with full manufacturer support and ROHS3 compliance. This substitute requires PCB layout modification to accommodate the different package footprint.

AD8036ARZ (Analog Devices Inc.)

The AD8036ARZ is an alternative substitute from Analog Devices Inc., available in the original 8-SOIC package format, eliminating PCB redesign requirements. The AD8036ARZ exceeds the THS4271DR in slew rate performance (1200V/µs versus 1000V/µs) and demonstrates superior input characteristics with lower input bias current (4 µA versus 6 µA) and lower input offset voltage (2 mV versus 5 mV). However, the AD8036ARZ exhibits reduced -3dB bandwidth (240 MHz versus 1.4 GHz), which may impact applications requiring the full bandwidth specification of the original device. The AD8036ARZ operates within a narrower supply voltage range (6V to 12V minimum versus 5V to 15V), requiring verification of circuit supply architecture. The AD8036ARZ holds active product status with ROHS3 compliance and MSL 1 rating.

Selection Criteria:

• Select THS4271DGK for direct electrical performance replacement when PCB layout modification is acceptable
• Select AD8036ARZ when package footprint compatibility with existing PCB is required and reduced bandwidth specification is acceptable for the application
• Both substitutes maintain compliance certifications (ROHS3, REACH Unaffected, EAR99 ECCN classification)

Frequently Asked Questions (FAQ)

Q: Can the THS4271DR be directly replaced with the THS4271DGK without circuit modification?

A: The THS4271DGK is electrically identical to the THS4271DR and operates within the same supply voltage and temperature ranges. However, the package format differs: THS4271DGK uses 8-TSSOP/8-MSOP (0.118", 3.00mm Width) while THS4271DR uses 8-SOIC (0.154", 3.90mm Width). PCB layout modification is required to accommodate the different footprint, though the pin count and signal assignments remain compatible.

Q: What is the primary advantage of the AD8036ARZ substitute?

A: The AD8036ARZ maintains the original 8-SOIC package format, eliminating PCB redesign requirements. It also provides superior slew rate (1200V/µs) and lower input offset voltage (2 mV), beneficial for precision applications. The trade-off is reduced -3dB bandwidth (240 MHz versus 1.4 GHz) and a narrower supply voltage range (6V to 12V).

Q: Are there supply voltage compatibility issues with the AD8036ARZ?

A: The AD8036ARZ operates within a 6V to 12V supply range, compared to the THS4271DR range of 5V to 15V. Circuits designed for 5V single supply or 15V maximum supply operation require verification before selecting the AD8036ARZ. The THS4271DGK maintains the full 5V to 15V range.

Q: Do both substitute parts meet the same compliance and regulatory requirements?

A: Both the THS4271DGK and AD8036ARZ are ROHS3 compliant, REACH unaffected, and classified as EAR99 under ECCN regulations. Both carry MSL 1 (Unlimited) moisture sensitivity ratings. Compliance requirements are equivalent to the original THS4271DR.

Q: Which substitute is recommended for new designs?

A: The THS4271DGK is recommended for new designs requiring direct electrical performance equivalence to the THS4271DR. The AD8036ARZ is suitable for applications where package footprint compatibility is prioritized and the reduced bandwidth specification is acceptable.

Q: What is the impact of bandwidth differences between substitutes?

A: The THS4271DR and THS4271DGK both provide 1.4 GHz -3dB bandwidth. The AD8036ARZ provides 240 MHz -3dB bandwidth. Applications requiring full bandwidth performance must use the THS4271DGK. Applications with bandwidth requirements below 240 MHz can utilize the AD8036ARZ.

Q: Are pin assignments identical across all three devices?

A: All three devices are single-circuit voltage feedback amplifiers in 8-pin packages with identical functional pin assignments. Package physical dimensions differ, requiring footprint-specific PCB layouts.