THS3112IDDAR Equivalent & Substitute Parts

Part Overview

The THS3112IDDAR is a current feedback amplifier manufactured by Texas Instruments, featuring dual operational amplifier circuits in an 8-PowerSOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The THS3112IDDAR delivers a slew rate of 1550V/µs and -3dB bandwidth of 110 MHz, suitable for applications requiring moderate-speed signal conditioning and amplification. Due to its Last Time Buy status, identifying functionally equivalent substitute components is essential for design continuity and long-term supply chain planning.

Substiute Parts

THS3112IDDAR

Texas InstrumentsIn Stock: 2939THS3112IDDAR Datasheet

Current PartRFQ

THS3092DDAR

Texas InstrumentsIn Stock: 2342THS3092DDAR Datasheet

MFR RecommendedRFQ

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

Substitute components for the THS3112IDDAR are identified based on strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Amplifier Type: Current Feedback
• Number of Circuits: 2
• Package Type: 8-pin surface mount (8-PowerSOIC, 8-SOIC, or 8-SOP)
• Voltage Supply Range: Minimum 10V to Maximum 30V (or compatible dual supply)
• Operating Temperature Range: -40°C to 85°C
• RoHS3 Compliance and MSL Level 1

Secondary Compatibility Parameters:

• Slew Rate: 1550V/µs or higher
• -3dB Bandwidth: 110 MHz or higher
• Current Output per Channel: 270 mA or higher
• Input Bias Current: 330 nA or lower
• Input Offset Voltage: 3 mV or lower

The substitute parts listed below meet the primary criteria and maintain functional compatibility within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

THS3092DDAR (Texas Instruments)

The THS3092DDAR is the primary recommended substitute for the THS3112IDDAR. Both devices are manufactured by Texas Instruments and share identical package specifications (8-PowerSOIC), supply voltage range (10V to 30V), and operating temperature range (-40°C to 85°C). The THS3092DDAR maintains Active product status with superior electrical performance: slew rate of 5700V/µs (3.68× higher), -3dB bandwidth of 160 MHz (45% higher), and output current of 280 mA per channel (3.7% higher). This device is suitable for applications where the THS3112IDDAR performance envelope is insufficient. Both devices are ROHS3 compliant with MSL Level 1 rating.

HA5023IBZ and HA5023IBZ96 (Renesas Electronics Corporation)

The HA5023IBZ and HA5023IBZ96 are functionally equivalent Renesas alternatives, differing only in packaging format (Tube versus Tape & Reel). Both devices feature current feedback amplifier topology with dual circuits in 8-SOIC packages. The HA5023 series operates within a dual supply range of ±4.75V to ±18V, which encompasses the THS3112IDDAR single supply range when configured appropriately. The -3dB bandwidth of 125 MHz exceeds the THS3112IDDAR specification. However, the output current per channel is limited to 20 mA, significantly lower than the THS3112IDDAR's 270 mA. These devices are suitable for lower-current applications. Both variants maintain Active product status and ROHS3 compliance.

LT1229CS8#PBF (Analog Devices Inc.)

The LT1229CS8#PBF is an Analog Devices current feedback amplifier with dual circuits in 8-SOIC package. This device operates within a supply voltage range of 4V to 30V, compatible with the THS3112IDDAR's 10V to 30V specification. The -3dB bandwidth of 100 MHz is slightly lower than the THS3112IDDAR (110 MHz), and slew rate of 700V/µs is approximately 45% lower. Output current per channel is 125 mA, substantially lower than the THS3112IDDAR's 270 mA. The operating temperature range is restricted to 0°C to 70°C, narrower than the THS3112IDDAR's -40°C to 85°C. This device is suitable for moderate-speed applications within the specified temperature range. The LT1229CS8#PBF maintains Active status and ROHS3 compliance.

UPC1251G2-E1-A (Renesas Electronics Corporation)

The UPC1251G2-E1-A is a general-purpose amplifier with push-pull output configuration, differing fundamentally from the THS3112IDDAR's current feedback topology. While this device features dual circuits in 8-SOIC package and operates across -40°C to 85°C, its general-purpose amplifier classification and push-pull output make it suitable only for applications where current feedback characteristics are not critical. The output current per channel is 70 mA, significantly lower than the THS3112IDDAR. This device is recommended only when current feedback performance is not a design requirement. The UPC1251G2-E1-A maintains Active status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q1: Can the THS3092DDAR directly replace the THS3112IDDAR without circuit modifications?

The THS3092DDAR shares identical package (8-PowerSOIC), pin configuration, supply voltage range (10V to 30V), and operating temperature range (-40°C to 85°C) with the THS3112IDDAR. Both are current feedback amplifiers with dual circuits. Direct pin-for-pin substitution is mechanically and electrically feasible. However, the THS3092DDAR exhibits superior performance specifications (higher slew rate and bandwidth). Circuit validation is necessary to confirm that the enhanced performance does not introduce unintended effects such as increased noise or oscillation in the specific application.

Q2: Why is the HA5023IBZ series recommended despite lower output current specifications?

The HA5023IBZ and HA5023IBZ96 are recommended for applications where output current requirements do not exceed 20 mA per channel. These devices maintain current feedback amplifier topology, dual-circuit configuration, and compatible package dimensions (8-SOIC). The -3dB bandwidth of 125 MHz exceeds the THS3112IDDAR specification. For applications requiring higher output current (above 20 mA), the HA5023 series is not suitable; alternative substitutes should be evaluated.

Q3: What is the significance of the operating temperature range difference between LT1229CS8#PBF and THS3112IDDAR?

The LT1229CS8#PBF operates from 0°C to 70°C, while the THS3112IDDAR operates from -40°C to 85°C. Applications requiring operation below 0°C or above 70°C cannot use the LT1229CS8#PBF. For designs with extended temperature requirements, the THS3092DDAR or HA5023 series are more appropriate selections.

Q4: Is the UPC1251G2-E1-A suitable as a substitute for the THS3112IDDAR?

The UPC1251G2-E1-A is classified as a general-purpose amplifier with push-pull output, fundamentally different from the THS3112IDDAR's current feedback topology. Substitution is appropriate only for applications where current feedback characteristics are not essential. The significantly lower output current (70 mA versus 270 mA) further restricts its applicability. For designs requiring current feedback performance, this device is not recommended.

Q5: What packaging options are available for substitute parts?

The THS3112IDDAR is supplied in 8-PowerSOIC package with Tape & Reel (TR) packaging. Substitute options include: THS3092DDAR (8-PowerSOIC, TR), HA5023IBZ (8-SOIC, Tube), HA5023IBZ96 (8-SOIC, TR), LT1229CS8#PBF (8-SOIC, Tube), and UPC1251G2-E1-A (8-SOIC, TR). Package footprints for 8-PowerSOIC and 8-SOIC are mechanically compatible (0.154" width, 3.90mm), allowing PCB reuse with appropriate design verification.

Q6: Are all substitute parts RoHS3 compliant and MSL Level 1?

All substitute parts listed (THS3092DDAR, HA5023IBZ, HA5023IBZ96, LT1229CS8#PBF, UPC1251G2-E1-A) are ROHS3 compliant and rated MSL Level 1 (Unlimited moisture sensitivity), matching the THS3112IDDAR specifications. These devices are suitable for applications with standard moisture and environmental handling requirements.

Q7: Which substitute offers the best performance upgrade from the THS3112IDDAR?

The THS3092DDAR provides the most significant performance improvement: slew rate increases from 1550V/µs to 5700V/µs (268% improvement), and -3dB bandwidth increases from 110 MHz to 160 MHz (45% improvement). Output current per channel increases marginally from 270 mA to 280 mA. The THS3092DDAR is recommended for applications where enhanced speed and bandwidth are beneficial and compatible with circuit design constraints.