THS4271DRG4 Equivalent & Substitute Parts

Part Overview

The THS4271DRG4 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 active equivalent and substitute components for new designs and production continuity. The THS4271DRG4 delivers high-speed amplification with a 1000V/µs slew rate and 400 MHz gain bandwidth product, suitable for applications requiring wideband signal conditioning and high-frequency amplification.

Substiute Parts

THS4271DRG4

Texas InstrumentsIn Stock: 3210THS4271DRG4 Datasheet

Current PartRFQ

AD8036ARZ-REEL

Analog Devices Inc.In Stock: 1038AD8036ARZ-REEL Datasheet

MFR RecommendedRFQ

AD8036ARZ-REEL7

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

MFR RecommendedRFQ

AD8037ARZ

Analog Devices Inc.In Stock: 4361AD8037ARZ Datasheet

MFR RecommendedRFQ

AD8037ARZ-REEL7

Analog Devices Inc.In Stock: 2454AD8037ARZ-REEL7 Datasheet

MFR RecommendedRFQ

THS4271DGK

Texas InstrumentsIn Stock: 1288THS4271DGK Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS4271DRG4 is determined by the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 1
• Package Type: 8-SOIC or compatible surface mount package
• Operating Temperature Range: -40°C to 85°C minimum
• RoHS3 Compliance and MSL Level 1 rating

Performance Compatibility Criteria:

• Slew Rate: Equal to or greater than 1000V/µs
• Gain Bandwidth Product: Equal to or greater than 400 MHz
• -3dB Bandwidth: Equal to or greater than 1.4 GHz
• Supply Voltage Range: Must encompass the 5V to 15V span or be compatible within application requirements
• Input Bias Current: Lower values indicate improved performance
• Input Offset Voltage: Lower values indicate improved performance

Substitute parts are grouped into two categories: direct pin-compatible replacements in 8-SOIC packaging and functional equivalents in alternative surface mount packages (8-VSSOP, Tape & Reel variants) that maintain electrical performance specifications.

Parameter Comparison

Engineering Selection Recommendations

Direct Pin-Compatible Replacement (8-SOIC Package):

The THS4271DGK serves as the primary active equivalent to the obsolete THS4271DRG4. Both devices share identical electrical specifications including 1000V/µs slew rate, 400 MHz gain bandwidth product, and 1.4 GHz -3dB bandwidth. The THS4271DGK differs only in package format (8-VSSOP versus 8-SOIC) and is available in active production status with full RoHS3 compliance and MSL Level 1 rating. This substitution requires PCB layout modification to accommodate the different package footprint.

Functional Equivalents with Enhanced Performance (Analog Devices AD8036/AD8037 Series):

The AD8036ARZ-REEL, AD8036ARZ-REEL7, AD8037ARZ, and AD8037ARZ-REEL7 are active voltage feedback amplifiers in 8-SOIC packaging with pin-compatible footprints. These devices deliver superior performance characteristics:

• AD8036 variants: 1200V/µs slew rate, 240 MHz -3dB bandwidth, 4 µA input bias current, 2 mV input offset voltage
• AD8037 variants: 1500V/µs slew rate, 270 MHz -3dB bandwidth, 3 µA input bias current, 2 mV input offset voltage

All substitute parts maintain the required operating temperature range (-40°C to 85°C), RoHS3 compliance, and MSL Level 1 rating. The AD8036 and AD8037 series operate within a 6V to 12V supply span, which is a subset of the THS4271DRG4's 5V to 15V range. Applications requiring the full 5V minimum supply voltage or 15V maximum supply voltage must verify compatibility with the reduced supply span of Analog Devices alternatives.

Packaging and Inventory Considerations:

• AD8036ARZ-REEL7: 3200 pcs available (Tape & Reel format)
• AD8037ARZ: 4311 pcs available (Tube format)
• AD8037ARZ-REEL7: 2364 pcs available (Tape & Reel format)
• THS4271DGK: 1210 pcs available (Tube format)

Selection between Tape & Reel and Tube packaging depends on production volume and assembly equipment compatibility.

Frequently Asked Questions (FAQ)

Q: Can the AD8036 or AD8037 series directly replace the THS4271DRG4 in existing designs?

A: The AD8036 and AD8037 series are pin-compatible in 8-SOIC packaging and share the same functional classification as voltage feedback amplifiers. However, the reduced maximum supply voltage (12V versus 15V) must be verified against application requirements. The lower -3dB bandwidth (240 MHz for AD8036, 270 MHz for AD8037 versus 1400 MHz for THS4271DRG4) may impact high-frequency performance in bandwidth-critical applications.

Q: What is the difference between AD8036ARZ-REEL and AD8036ARZ-REEL7?

A: Both variants are identical in electrical specifications and 8-SOIC packaging. The designation difference reflects packaging format and reel configuration for automated assembly. Selection depends on production equipment compatibility and tape reel specifications.

Q: Is the THS4271DGK a direct replacement for the THS4271DRG4?

A: The THS4271DGK is electrically identical to the THS4271DRG4, sharing all performance specifications including 1000V/µs slew rate, 400 MHz gain bandwidth product, and 1.4 GHz -3dB bandwidth. The primary difference is the package format: THS4271DGK uses 8-VSSOP (8-TSSOP) versus THS4271DRG4's 8-SOIC. PCB layout modification is required to accommodate the different footprint dimensions.

Q: Why do the Analog Devices substitutes have lower -3dB bandwidth than the THS4271DRG4?

A: The AD8036 and AD8037 series are optimized for different performance trade-offs. While they deliver higher slew rates (1200V/µs and 1500V/µs respectively) and lower input offset voltage (2 mV versus 5 mV), their -3dB bandwidth specifications (240 MHz and 270 MHz) are lower than the THS4271DRG4's 1400 MHz. Applications requiring the full 1400 MHz bandwidth must use the THS4271DGK or verify that the reduced bandwidth of AD8036/AD8037 is acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts—AD8036ARZ-REEL, AD8036ARZ-REEL7, AD8037ARZ, AD8037ARZ-REEL7, and THS4271DGK—are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the THS4271DRG4.

Q: What supply voltage range should be used when substituting with AD8036 or AD8037 devices?

A: The AD8036 and AD8037 series operate within a 6V to 12V supply span. Applications using the THS4271DRG4 at 5V minimum supply must be redesigned to operate at 6V or higher when using Analog Devices substitutes. Applications requiring 15V maximum supply must be verified to operate within the 12V maximum of the AD8036/AD8037 series.

Q: What is the current output capability of each substitute?

A: The THS4271DRG4 specifications do not include output current rating. The AD8036 and AD8037 series specify 70 mA output current per channel. The THS4271DGK specifies 160 mA output current per channel, providing higher drive capability for load applications.