THS4141CDGK Equivalent & Substitute Parts

Part Overview

The THS4141CDGK is a differential amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-VSSOP surface mount package. This linear amplifier device features a single differential circuit with high slew rate performance of 450V/µs and a gain bandwidth product of 205 MHz. The THS4141CDGK is classified as obsolete product status, making identification of active equivalent and substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

THS4141CDGK

Texas InstrumentsIn Stock: 1036THS4141CDGK Datasheet

Current PartRFQ

AD8421TRMZ-EP

Analog Devices Inc.In Stock: 1489AD8421TRMZ-EP Datasheet

MFR RecommendedRFQ

AD8421TRMZ-EP-R7

Analog Devices Inc.In Stock: 3272AD8421TRMZ-EP-R7 Datasheet

MFR RecommendedRFQ

THS4141IDGK

Texas InstrumentsIn Stock: 947THS4141IDGK Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the THS4141CDGK is based on the following critical parameters: amplifier type classification, number of circuits, output type configuration, slew rate performance, bandwidth characteristics, supply voltage range compatibility, and surface mount package compatibility.

The THS4141IDGK represents a direct equivalent within the same product family, maintaining identical electrical specifications and differential amplifier topology while offering active product status. This part is suitable for direct replacement in applications requiring the original THS4141CDGK performance envelope.

The AD8421TRMZ-EP and AD8421TRMZ-EP-R7 represent alternative amplifier architectures from Analog Devices Inc., classified as instrumentation amplifiers rather than differential amplifiers. These parts operate within compatible supply voltage ranges (5V to 36V) and share the same 8-MSOP surface mount package footprint. However, these substitutes feature significantly different electrical characteristics, including reduced slew rate (35V/µs versus 450V/µs), lower bandwidth (10 MHz versus 160 MHz), and different input bias current specifications (1 nA versus 5.1 µA). Selection of these parts requires application-level analysis to confirm compatibility with the original circuit design intent.

Parameter Comparison

Engineering Selection Recommendations

THS4141IDGK is the primary substitute for the obsolete THS4141CDGK. This part maintains identical electrical performance specifications across all measured parameters including slew rate, bandwidth, and supply current characteristics. The THS4141IDGK carries active product status from Texas Instruments, ensuring long-term availability and manufacturing support. Both parts share the same 8-VSSOP package footprint and are ROHS3 compliant with MSL 1 rating. The THS4141IDGK operates across an extended temperature range (-40°C to 85°C) compared to the original part (0°C to 70°C), providing broader environmental compatibility. This part is suitable for direct replacement without circuit redesign.

AD8421TRMZ-EP and AD8421TRMZ-EP-R7 are alternative active components from Analog Devices Inc. These instrumentation amplifier devices operate within compatible supply voltage ranges and share the same 8-MSOP surface mount package family. However, these parts exhibit fundamentally different electrical characteristics. The reduced slew rate (35V/µs versus 450V/µs) and lower bandwidth (10 MHz versus 160 MHz) indicate these parts are optimized for precision measurement applications rather than high-speed signal processing. The significantly lower input bias current (1 nA versus 5.1 µA) and input offset voltage (70 µV versus 1 mV) reflect the instrumentation amplifier architecture. Selection of these parts requires confirmation that the application circuit can operate within these reduced performance parameters. Both AD8421 variants are ROHS3 compliant with MSL 1 rating and offer extended temperature range operation (-55°C to 125°C).

Frequently Asked Questions (FAQ)

Q: Can the THS4141IDGK be used as a direct replacement for the THS4141CDGK?

A: Yes. The THS4141IDGK is a direct equivalent with identical electrical specifications. Both parts are differential amplifiers with 450V/µs slew rate, 205 MHz gain bandwidth product, and 160 MHz -3dB bandwidth. The THS4141IDGK offers active product status and extended operating temperature range. No circuit modifications are required.

Q: What is the primary difference between the THS4141CDGK and the AD8421 series?

A: The THS4141CDGK is a differential amplifier, while the AD8421 series are instrumentation amplifiers. These represent different amplifier architectures with distinct electrical characteristics. The THS4141CDGK provides 450V/µs slew rate and 160 MHz bandwidth, while the AD8421 series provide 35V/µs slew rate and 10 MHz bandwidth. Application requirements determine which architecture is appropriate.

Q: Are the THS4141IDGK and AD8421TRMZ-EP pin-compatible?

A: Both parts use 8-pin surface mount packages (8-VSSOP and 8-MSOP respectively) with 0.118" width and 3.00mm pitch. While the physical footprints are compatible, the internal circuit architectures differ. Pin-level compatibility requires verification against the specific application schematic.

Q: What is the difference between AD8421TRMZ-EP and AD8421TRMZ-EP-R7?

A: Both parts are identical in electrical specifications and performance characteristics. The primary difference is packaging designation. AD8421TRMZ-EP is supplied in tube packaging, while AD8421TRMZ-EP-R7 uses alternative packaging. Both are active products with identical inventory availability and compliance certifications.

Q: Can I use the AD8421 parts in applications requiring high-speed signal processing?

A: The AD8421 series are optimized for precision instrumentation applications with 10 MHz bandwidth and 35V/µs slew rate. Applications requiring 160 MHz bandwidth and 450V/µs slew rate performance require the THS4141IDGK or equivalent differential amplifier architecture.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The THS4141IDGK, AD8421TRMZ-EP, and AD8421TRMZ-EP-R7 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts meet current environmental and regulatory requirements.

Q: What is the operating temperature range difference between the main part and substitutes?

A: The THS4141CDGK operates from 0°C to 70°C. The THS4141IDGK extends this to -40°C to 85°C. The AD8421 series provide the widest range at -55°C to 125°C. Application temperature requirements determine which part is appropriate.