THS3112CDDAR Equivalent & Substitute Parts

Part Overview

The THS3112CDDAR is a current feedback amplifier integrated circuit manufactured by Texas Instruments, featuring two circuits in an 8-PowerSOIC surface mount package. This device is classified as obsolete, necessitating identification of active alternative components for new designs and production continuity. The THS3112CDDAR delivers high slew rate performance at 1550V/µs with 110 MHz bandwidth, making it suitable for applications requiring fast signal processing in compact form factors.

Substiute Parts

THS3112CDDAR

Texas InstrumentsIn Stock: 742THS3112CDDAR 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 THS3112CDDAR is determined by the following critical parameters: amplifier type (current feedback), number of circuits (2), package compatibility (8-pin surface mount), supply voltage range, slew rate, bandwidth, and output current capability. The substitute parts identified maintain the core functional characteristics while offering active product status and improved availability.

The substitution logic groups parts into two categories:

Category 1: Direct Current Feedback Amplifier Substitutes – Parts maintaining current feedback topology with comparable bandwidth and slew rate performance. These include HA5023IBZ, HA5023IBZ96, and LT1229CS8#PBF, which preserve the amplifier type and dual-circuit configuration.

Category 2: General Purpose Amplifier Alternative – UPC1251G2-E1-A represents a general purpose amplifier with push-pull output configuration, suitable for applications where current feedback topology is not mandatory and lower slew rate is acceptable.

Substitution eligibility is based on: matching number of circuits (2), compatible package form factor (8-pin surface mount), overlapping supply voltage ranges, and output current capability sufficient for the application requirements.

Parameter Comparison

Engineering Selection Recommendations

HA5023IBZ and HA5023IBZ96 are recommended as primary substitutes for the THS3112CDDAR. Both parts maintain current feedback amplifier topology with dual circuits in compatible 8-SOIC packages. These Renesas Electronics components are active products with ROHS3 compliance and unlimited moisture sensitivity rating. The HA5023IBZ96 variant in Tape & Reel packaging offers higher inventory availability (2532 pieces) compared to the tube-packaged HA5023IBZ (1431 pieces). Bandwidth performance is superior at 125 MHz versus 110 MHz in the original part. Output current per channel is reduced to 20 mA, requiring verification that application requirements do not exceed this specification.

LT1229CS8#PBF from Analog Devices Inc. serves as an alternative current feedback amplifier substitute. This active product maintains current feedback topology and dual-circuit configuration with 100 MHz bandwidth and 700V/µs slew rate. Supply voltage range extends to 4V minimum, providing broader compatibility. Output current capability at 125 mA per channel exceeds the HA5023 series but remains below the original THS3112CDDAR specification of 270 mA. ROHS3 compliance and unlimited MSL rating are maintained.

UPC1251G2-E1-A represents a general purpose amplifier alternative with push-pull output configuration. This part is suitable only for applications where current feedback topology is not a functional requirement. The device offers the lowest supply current at 700 µA and extended operating temperature range (-40°C to 85°C). Output current capability at 70 mA per channel and unspecified slew rate and bandwidth parameters require application-specific evaluation.

All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity rating, and surface mount configuration. Selection should prioritize HA5023IBZ96 for new production due to active status and superior inventory availability.

Frequently Asked Questions (FAQ)

Q: Can HA5023IBZ directly replace THS3112CDDAR in existing designs?

A: HA5023IBZ maintains current feedback amplifier topology and dual-circuit configuration in a compatible 8-SOIC package. However, output current per channel is reduced from 270 mA to 20 mA. Direct substitution is valid only if application output current requirements do not exceed 20 mA per channel. Pin configuration and package footprint are compatible.

Q: What is the difference between HA5023IBZ and HA5023IBZ96?

A: Both parts are electrically identical Renesas Electronics current feedback amplifiers. The primary difference is packaging format: HA5023IBZ is supplied in Tube packaging, while HA5023IBZ96 is supplied in Tape & Reel (TR) format. HA5023IBZ96 offers higher inventory availability and is preferred for high-volume production.

Q: Why does LT1229CS8#PBF have lower slew rate than THS3112CDDAR?

A: LT1229CS8#PBF from Analog Devices Inc. is specified at 700V/µs slew rate compared to 1550V/µs for the THS3112CDDAR. This represents a design trade-off in the LT1229 architecture. Applications requiring slew rates exceeding 700V/µs should prioritize HA5023IBZ or HA5023IBZ96 substitutes.

Q: Is UPC1251G2-E1-A suitable as a substitute?

A: UPC1251G2-E1-A is a general purpose amplifier with push-pull output, differing fundamentally from the current feedback topology of THS3112CDDAR. This part is suitable only for applications where current feedback characteristics are not required. Slew rate and bandwidth specifications are not provided for this device.

Q: What are the package compatibility considerations?

A: THS3112CDDAR uses 8-PowerSOIC package (0.154", 3.90mm width). HA5023IBZ and HA5023IBZ96 use 8-SOIC package (0.154", 3.90mm width), which is footprint-compatible. LT1229CS8#PBF uses 8-SOIC (0.154", 3.90mm width), also compatible. UPC1251G2-E1-A uses 8-SOIC (0.173", 4.40mm width), which has different width and requires PCB layout verification before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. THS3112CDDAR, HA5023IBZ, HA5023IBZ96, LT1229CS8#PBF, and UPC1251G2-E1-A are all ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: Which substitute offers the best availability?

A: HA5023IBZ96 in Tape & Reel format offers the highest inventory availability at 2532 pieces new original in stock, followed by UPC1251G2-E1-A at 5911 pieces. However, UPC1251G2-E1-A is a general purpose amplifier and not a direct current feedback substitute.

Q: What supply voltage ranges are supported by each substitute?

A: THS3112CDDAR operates at 10V to 30V. HA5023IBZ and HA5023IBZ96 operate at ±4.75V to ±18V (dual supply). LT1229CS8#PBF operates at 4V to 30V. UPC1251G2-E1-A operates at 3V to 30V. Application supply voltage architecture must be verified for compatibility.