THS3112IDR Equivalent & Substitute Parts Reference

Part Overview

The THS3112IDR is a current feedback amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device contains two amplifier circuits and is classified as obsolete, necessitating identification of active alternative components for new designs and production continuity. The part operates across a wide supply voltage range of 10V to 30V with a slew rate of 1550V/µs and -3dB bandwidth of 110 MHz, making it suitable for high-speed signal conditioning applications.

Substiute Parts

THS3112IDR

Texas InstrumentsIn Stock: 941THS3112IDR Datasheet

Current PartRFQ

HA5023IBZ

Renesas Electronics CorporationIn Stock: 1464HA5023IBZ Datasheet

MFR RecommendedRFQ

HA5023IBZ96

Renesas Electronics CorporationIn Stock: 2594HA5023IBZ96 Datasheet

MFR RecommendedRFQ

LT1229CS8#PBF

Analog Devices Inc.In Stock: 1770LT1229CS8#PBF Datasheet

MFR RecommendedRFQ

UPC1251G2-E1-A

Renesas Electronics CorporationIn Stock: 5934UPC1251G2-E1-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS3112IDR is determined by the following critical parameters: amplifier type (current feedback), number of circuits (2), package type (8-SOIC surface mount), supply voltage range compatibility, and product status (active vs. obsolete). The substitute parts listed below are grouped based on their ability to maintain functional equivalence within these constraints.

Primary substitution criteria:

• Amplifier Type: Current Feedback
• Number of Circuits: 2
• Package: 8-SOIC surface mount
• Supply Voltage Range: Overlap with 10V to 30V span
• Product Status: Active (preferred for new designs)
• Compliance: ROHS3 and REACH requirements

Parameter Comparison

Engineering Selection Recommendations

HA5023IBZ and HA5023IBZ96 (Renesas Electronics)

These parts are functionally equivalent current feedback amplifiers with identical electrical specifications. Both are active products with ROHS3 compliance. The HA5023IBZ96 is supplied in Tape & Reel packaging (2532 pcs inventory), while HA5023IBZ is supplied in Tube packaging (1431 pcs inventory). Selection between these two should be based on production volume requirements and assembly line compatibility. Both support the same 8-SOIC package footprint (3.90mm width) as the THS3112IDR. The -3dB bandwidth of 125 MHz exceeds the original specification of 110 MHz. The slew rate of 350V/µs is lower than the THS3112IDR (1550V/µs), and output current per channel is reduced to 20 mA from 270 mA. Supply voltage range operates in dual supply mode (±4.75V to ±18V), which differs from the single supply range of the original part.

LT1229CS8#PBF (Analog Devices Inc.)

This current feedback amplifier is an active product with ROHS3 compliance and LT® series designation. It maintains the same package footprint (8-SOIC, 3.90mm width) and dual-circuit configuration. The -3dB bandwidth of 100 MHz is slightly lower than the THS3112IDR specification. The slew rate of 700V/µs is lower than the original part. Output current per channel is 125 mA, representing a significant reduction from 270 mA. The supply voltage range extends from 4V to 30V, providing broader compatibility than the original 10V to 30V specification. Operating temperature range is 0°C to 70°C, which is narrower than the THS3112IDR range of -40°C to 85°C. This part is suitable for applications where the reduced operating temperature range is acceptable.

UPC1251G2-E1-A (Renesas Electronics)

This part is classified as a general purpose amplifier rather than a current feedback amplifier, representing a functional departure from the original THS3112IDR architecture. It is an active product with ROHS3 compliance, supplied in Tape & Reel packaging (5911 pcs inventory). The package width is 4.40mm, which differs from the 3.90mm width of the THS3112IDR and may require PCB layout modifications. The output type is specified as Push-Pull, differing from the original part. Supply current is significantly lower at 700 µA. The operating temperature range of -40°C to 85°C matches the original specification. This part should be considered only when the general purpose amplifier topology is functionally acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can the HA5023IBZ directly replace the THS3112IDR without circuit modifications?

A: The HA5023IBZ maintains the same 8-SOIC package footprint and dual-circuit current feedback architecture. However, the supply voltage range differs (±4.75V to ±18V dual supply versus 10V to 30V single supply), requiring power supply circuit modifications. The reduced slew rate (350V/µs versus 1550V/µs) and output current (20 mA versus 270 mA) may impact high-speed or high-current applications. Circuit validation is required for specific applications.

Q: What is the difference between HA5023IBZ and HA5023IBZ96?

A: Both parts are electrically identical current feedback amplifiers from Renesas Electronics with the same specifications. The primary difference is packaging: HA5023IBZ is supplied in Tube format, while HA5023IBZ96 is supplied in Tape & Reel format. Selection depends on production volume and assembly equipment compatibility. The HA5023IBZ96 has higher inventory availability (2532 pcs versus 1431 pcs).

Q: Is the LT1229CS8#PBF suitable for applications requiring -40°C operation?

A: No. The LT1229CS8#PBF operating temperature range is 0°C to 70°C, which does not include -40°C. The THS3112IDR and UPC1251G2-E1-A both support -40°C to 85°C operation. If -40°C operation is required, the LT1229CS8#PBF is not suitable.

Q: Why is the UPC1251G2-E1-A classified as a general purpose amplifier rather than current feedback?

A: The UPC1251G2-E1-A is specified with Push-Pull output topology and general purpose amplifier classification, differing from the current feedback architecture of the THS3112IDR. This represents a different amplifier topology and should be selected only when the application requirements align with general purpose amplifier characteristics rather than current feedback specifications.

Q: What are the package compatibility considerations for these substitute parts?

A: The THS3112IDR, HA5023IBZ, HA5023IBZ96, and LT1229CS8#PBF all use 8-SOIC packages with 3.90mm width, providing direct PCB footprint compatibility. The UPC1251G2-E1-A uses an 8-SOIC package with 4.40mm width, which differs and may require PCB layout modifications. Verify package dimensions against your PCB design before component selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (HA5023IBZ, HA5023IBZ96, LT1229CS8#PBF, and UPC1251G2-E1-A) are ROHS3 compliant and REACH unaffected, matching the compliance status of the THS3112IDR.

Q: Which substitute part has the highest inventory availability?

A: The UPC1251G2-E1-A has the highest inventory with 5911 pcs in stock. The HA5023IBZ96 has 2532 pcs, LT1229CS8#PBF has 1692 pcs, and HA5023IBZ has 1431 pcs available.