THS3120CD Equivalent & Substitute Parts

Part Overview

The THS3120CD is a current feedback amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC package. This device is classified as obsolete, indicating it is no longer in active production. The THS3120CD provides high-speed amplification with a slew rate of 1700V/µs and -3dB bandwidth of 130 MHz, making it suitable for applications requiring fast signal processing and wide bandwidth performance.

Due to its obsolete status, locating replacement units from original inventory becomes increasingly difficult. Identifying equivalent substitute parts with matching electrical and mechanical specifications ensures design continuity and system reliability when the original component becomes unavailable.

Substiute Parts

THS3120CD

Texas InstrumentsIn Stock: 1135THS3120CD Datasheet

Current PartRFQ

THS3120CDGN

Texas InstrumentsIn Stock: 968THS3120CDGN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS3120CD is determined by equivalence across all critical electrical parameters and compliance certifications. The substitute part must maintain identical performance characteristics in the following categories:

Electrical Performance Parameters: Slew rate, -3dB bandwidth, input bias current, input offset voltage, supply current, output current per channel, and supply voltage range must be identical to ensure functional compatibility within existing circuit designs.

Functional Architecture: The amplifier type (current feedback) and number of circuits (1) must remain constant to preserve circuit topology and signal processing characteristics.

Compliance & Environmental Standards: RoHS3 compliance and moisture sensitivity level must match or exceed the original specification to maintain regulatory and reliability standards.

Mechanical Compatibility: While package form factors may differ between the main part and substitutes, the mounting type (surface mount) and pin configuration must support direct integration into existing printed circuit board layouts.

The THS3120CDGN qualifies as a direct substitute based on complete electrical parameter equivalence and identical compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The THS3120CDGN is the manufacturer-recommended substitute for the obsolete THS3120CD. Selection of this substitute is based on the following engineering criteria:

Electrical Equivalence: All electrical performance parameters are identical between the main part and substitute, ensuring functional compatibility in signal processing applications requiring 1700V/µs slew rate and 130 MHz bandwidth performance.

Product Status Advantage: The THS3120CDGN maintains active production status with Texas Instruments, providing assured long-term availability and supply chain reliability compared to the obsolete THS3120CD.

Compliance Certification: Both parts maintain ROHS3 compliance and identical moisture sensitivity levels (MSL 1), ensuring regulatory conformance and environmental reliability standards are preserved.

Manufacturer Endorsement: Texas Instruments explicitly designates the THS3120CDGN as the recommended substitute, confirming engineering validation and design compatibility.

Package Consideration: The substitute employs an 8-HVSSOP package format with exposed pad, differing from the 8-SOIC package of the original part. PCB layout modifications are required to accommodate the different package footprint and pin spacing.

Frequently Asked Questions (FAQ)

Q: Can the THS3120CDGN be used as a direct pin-for-pin replacement for the THS3120CD?

A: The THS3120CDGN provides electrical equivalence and identical pin functionality. However, the package form factor differs (8-HVSSOP versus 8-SOIC), requiring PCB layout modifications to accommodate the different footprint dimensions and pin spacing.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by matching slew rate (1700V/µs), -3dB bandwidth (130 MHz), input bias current (3 µA), input offset voltage (2 mV), supply current (7 mA), output current per channel (490 mA), and supply voltage range (10V to 30V). The THS3120CDGN matches all these parameters identically.

Q: Why is the THS3120CD classified as obsolete?

A: The THS3120CD is no longer in active production by Texas Instruments. The THS3120CDGN represents the current production alternative with identical electrical specifications.

Q: Are there compliance or environmental differences between the two parts?

A: No. Both parts maintain ROHS3 compliance, identical moisture sensitivity levels (MSL 1), and equivalent environmental ratings. Regulatory and reliability standards are preserved with the substitute.

Q: What is the primary difference between the THS3120CD and THS3120CDGN?

A: The primary difference is the package format. The THS3120CD uses an 8-SOIC package (0.154" width), while the THS3120CDGN uses an 8-HVSSOP package (0.118" width) with an exposed pad. All electrical performance characteristics are identical.

Q: Is the exposed pad on the THS3120CDGN package functionally significant?

A: The exposed pad on the 8-HVSSOP package provides thermal management benefits and improved heat dissipation compared to the 8-SOIC package. PCB design should incorporate thermal vias connected to the exposed pad for optimal thermal performance.

Q: What supply voltage range is supported by both parts?

A: Both the THS3120CD and THS3120CDGN support a supply voltage range of 10V to 30V, enabling operation across a wide range of power supply configurations.

Q: Can the THS3120CDGN operate in the same temperature range as the THS3120CD?

A: Yes. Both parts operate across the identical temperature range of 0°C to 70°C, ensuring thermal compatibility in equivalent applications.