THS3112CD Equivalent & Substitute Parts

Part Overview

The THS3112CD is a Current Feedback Amplifier manufactured by Texas Instruments, configured as a dual-circuit operational amplifier in 8-SOIC surface mount packaging. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The THS3112CD delivers high slew rate performance (1550V/µs) and 110 MHz bandwidth suitable for applications requiring fast signal processing in compact form factors. Equivalent and substitute parts are necessary due to product discontinuation and to provide design flexibility across multiple manufacturers while maintaining functional compatibility.

Substiute Parts

THS3112CD

Texas InstrumentsIn Stock: 930THS3112CD Datasheet

Current PartRFQ

THS3092D

Texas InstrumentsIn Stock: 3204THS3092D 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

LT1229CS8#TRPBF

Analog Devices Inc.In Stock: 1552LT1229CS8#TRPBF Datasheet

MFR RecommendedRFQ

LT1497CS8#PBF

Analog Devices Inc.In Stock: 993LT1497CS8#PBF Datasheet

MFR RecommendedRFQ

LT1497CS8#TRPBF

Analog Devices Inc.In Stock: 9591LT1497CS8#TRPBF Datasheet

MFR RecommendedRFQ

UPC1251G2-E1-A

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the THS3112CD 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 (10V to 30V minimum), and operating temperature range. Substitute parts must maintain functional equivalence in these core specifications to ensure direct replacement capability without circuit redesign.

The substitute parts are grouped into two categories:

Category 1: Direct Current Feedback Amplifiers (Preferred Substitutes) Parts THS3092D, HA5023IBZ, HA5023IBZ96, LT1229CS8#PBF, LT1229CS8#TRPBF, LT1497CS8#PBF, and LT1497CS8#TRPBF are current feedback amplifiers with dual circuits in 8-SOIC packaging. These parts share the same amplifier topology and package footprint as the THS3112CD, enabling direct substitution with consideration for performance parameter variations.

Category 2: Alternative Topology (Limited Substitution) Part UPC1251G2-E1-A is a general-purpose amplifier with push-pull output configuration. While it maintains dual-circuit configuration and 8-SOIC packaging, its different amplifier topology and output type require circuit evaluation before substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Current Feedback Topology)

THS3092D (Texas Instruments) is the manufacturer-recommended substitute. It maintains current feedback architecture and dual-circuit configuration with identical supply voltage range (10V to 30V). The THS3092D offers superior performance with 5700V/µs slew rate and 160 MHz bandwidth, making it suitable for applications requiring higher speed performance. Operating temperature range extends to -40°C to 85°C, providing broader environmental coverage. Product status is Active with 3100 units in stock.

LT1229CS8#PBF and LT1229CS8#TRPBF (Analog Devices) provide current feedback amplification with 100 MHz bandwidth and 700V/µs slew rate. These parts maintain identical input offset voltage (3 mV) and operating temperature range (0°C to 70°C) as the THS3112CD. Supply voltage minimum is reduced to 4V, expanding application flexibility. Packaging differs between tube and tape & reel formats. Inventory availability is 1692 and 1450 units respectively.

LT1497CS8#PBF and LT1497CS8#TRPBF (Analog Devices) deliver 900V/µs slew rate with 50 MHz bandwidth. These parts are suitable for lower-bandwidth applications with moderate slew rate requirements. Operating temperature and input offset voltage specifications match the THS3112CD. Supply voltage minimum is 5V. Inventory availability is 962 and 9533 units respectively.

HA5023IBZ and HA5023IBZ96 (Renesas Electronics) are current feedback video amplifiers with 125 MHz bandwidth and 350V/µs slew rate. These parts feature reduced output current per channel (20 mA versus 270 mA), limiting suitability to applications with lower output drive requirements. Supply voltage operates in dual ±4.75V to ±18V range. HA5023IBZ96 is supplied in tape & reel packaging with 2532 units in stock; HA5023IBZ is supplied in tube packaging with 1431 units in stock.

Secondary Substitute (Alternative Topology)

UPC1251G2-E1-A (Renesas Electronics) is a general-purpose amplifier with push-pull output configuration. This part differs fundamentally in amplifier topology and output type from the THS3112CD. Substitution requires circuit evaluation to confirm compatibility with existing feedback networks and load impedances. Operating temperature range (-40°C to 85°C) and supply voltage range (3V to 30V) provide broader environmental and supply flexibility. Product status is Active with 5911 units in stock.

Compliance and Certification

All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices. REACH status is unaffected for all parts. ECCN classification is EAR99 for all parts, maintaining consistent export control status.

Frequently Asked Questions (FAQ)

Q: Can THS3092D directly replace THS3112CD without circuit modification?

A: THS3092D maintains identical package footprint (8-SOIC), supply voltage range (10V to 30V), and dual current feedback amplifier configuration. Direct PCB substitution is possible. However, THS3092D exhibits higher slew rate (5700V/µs versus 1550V/µs) and bandwidth (160 MHz versus 110 MHz). Applications sensitive to these performance differences require circuit evaluation, particularly in feedback network design and stability analysis.

Q: What is the difference between HA5023IBZ and HA5023IBZ96?

A: Both parts are functionally identical current feedback amplifiers with 125 MHz bandwidth and 350V/µs slew rate. The primary difference is packaging format: HA5023IBZ is supplied in tube packaging, while HA5023IBZ96 is supplied in tape & reel (TR) format. Selection depends on assembly process requirements and volume handling procedures.

Q: Why does LT1497CS8 have lower bandwidth (50 MHz) than THS3112CD (110 MHz)?

A: LT1497CS8 is designed for applications requiring moderate bandwidth with controlled slew rate (900V/µs). The reduced bandwidth specification reflects different design optimization for specific application classes. Substitution is appropriate only for applications where 50 MHz bandwidth is sufficient.

Q: Is UPC1251G2-E1-A suitable as a drop-in replacement?

A: UPC1251G2-E1-A differs in amplifier topology (general-purpose versus current feedback) and output configuration (push-pull versus standard). While package footprint is 8-SOIC, the different internal architecture requires circuit redesign, particularly in feedback network configuration. This part is not a drop-in replacement and requires full circuit evaluation.

Q: What are the supply voltage compatibility considerations?

A: THS3112CD requires minimum 10V supply. LT1229CS8 and LT1497CS8 operate at minimum 4V and 5V respectively, allowing operation in lower-voltage systems. HA5023IBZ operates in dual ±4.75V to ±18V configuration, requiring symmetric supply design. UPC1251G2-E1-A operates at minimum 3V, providing maximum supply flexibility. Application supply voltage architecture determines which substitutes are compatible.

Q: How do input bias current specifications affect substitution?

A: THS3112CD specifies 330 nA input bias current. Substitute parts range from 14 nA (UPC1251G2-E1-A) to 10 µA (LT1229CS8, LT1497CS8). Higher input bias current increases input impedance loading and may affect circuit performance in high-impedance source applications. Applications with low-impedance sources are less sensitive to input bias current variations.

Q: What inventory considerations apply to substitute selection?

A: THS3112CD is Last Time Buy status with 855 units available. All substitute parts are Active status with higher inventory levels: THS3092D (3100 units), HA5023IBZ96 (2532 units), LT1497CS8#TRPBF (9533 units). Long-term design continuity favors Active status parts with higher inventory availability.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and environmental requirements.