THS4503CDG4 Equivalent & Substitute Parts

Part Overview

The THS4503CDG4 is a differential amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement. The THS4503CDG4 features a single differential amplifier circuit with high slew rate performance and wide bandwidth characteristics suitable for signal conditioning and data acquisition applications.

Substiute Parts

THS4503CDG4

Texas InstrumentsIn Stock: 1091THS4503CDG4 Datasheet

Current PartRFQ

THS4503CD

Texas InstrumentsIn Stock: 1159THS4503CD Datasheet

MFR RecommendedRFQ

AD8132ARZ

Analog Devices Inc.In Stock: 10361AD8132ARZ Datasheet

MFR RecommendedRFQ

AD8132ARZ-R7

Analog Devices Inc.In Stock: 43790AD8132ARZ-R7 Datasheet

MFR RecommendedRFQ

AD8132ARZ-RL

Analog Devices Inc.In Stock: 1616AD8132ARZ-RL Datasheet

MFR RecommendedRFQ

AD8138ARZ

Analog Devices Inc.In Stock: 21204AD8138ARZ Datasheet

MFR RecommendedRFQ

AD8138ARZ-R7

Analog Devices Inc.In Stock: 66082AD8138ARZ-R7 Datasheet

MFR RecommendedRFQ

AD8138ARZ-RL

Analog Devices Inc.In Stock: 7725AD8138ARZ-RL Datasheet

MFR RecommendedRFQ

ADA4857-1YRZ-R7

Analog Devices Inc.In Stock: 93446ADA4857-1YRZ-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS4503CDG4 is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

• Amplifier Type: Differential
• Number of Circuits: 1
• Output Type: Differential
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Slew Rate: 2800 V/µs (primary performance metric)
• -3dB Bandwidth: 370 MHz (primary performance metric)
• Voltage - Supply Span: 4.5 V to 15 V (operational range)

Substitute Parts Identified:

Group 1: Direct Differential Amplifier Substitutes (Identical Electrical Performance)

• THS4503CD (Texas Instruments) — Active product status, identical specifications, tube packaging
• AD8132ARZ (Analog Devices Inc.) — Active product status, 8-SOIC package, reduced slew rate (1200 V/µs), extended temperature range
• AD8132ARZ-R7 (Analog Devices Inc.) — Active product status, 8-SOIC package, reduced slew rate (1200 V/µs), extended temperature range
• AD8132ARZ-RL (Analog Devices Inc.) — Active product status, 8-SOIC package, reduced slew rate (1200 V/µs), extended temperature range

Group 2: Alternative Amplifier Architectures (Different Functional Classification)

• AD8138ARZ (Analog Devices Inc.) — ADC Driver classification, 8-SOIC package, active product status
• AD8138ARZ-R7 (Analog Devices Inc.) — ADC Driver classification, 8-SOIC package, active product status
• AD8138ARZ-RL (Analog Devices Inc.) — ADC Driver classification, 8-SOIC package, active product status
• ADA4857-1YRZ-R7 (Analog Devices Inc.) — Voltage Feedback Amplifier classification, 8-SOIC package, active product status, higher bandwidth (850 MHz)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: THS4503CD

The THS4503CD is the direct active equivalent of the obsolete THS4503CDG4. This part maintains identical electrical specifications including slew rate (2800 V/µs), bandwidth (370 MHz), supply voltage range (4.5 V to 15 V), and supply current (23 mA). The THS4503CD is manufactured by Texas Instruments with active product status, ROHS3 compliance, and MSL 1 rating. The only difference is packaging format (tube versus tape/reel), which does not affect electrical performance or functional compatibility.

Secondary Recommendation: AD8132ARZ Series (AD8132ARZ, AD8132ARZ-R7, AD8132ARZ-RL)

The AD8132ARZ series from Analog Devices Inc. provides differential amplifier functionality in the 8-SOIC package with active product status. These parts operate within the same package footprint and maintain differential output configuration. Trade-offs include reduced slew rate (1200 V/µs versus 2800 V/µs), slightly lower bandwidth (360 MHz versus 370 MHz), reduced supply current (12 mA versus 23 mA), and extended operating temperature range (-40°C to 125°C versus 0°C to 70°C). The AD8132ARZ series is suitable for applications where the lower slew rate and bandwidth are acceptable and where extended temperature operation is beneficial.

Alternative Consideration: ADA4857-1YRZ-R7

The ADA4857-1YRZ-R7 is a voltage feedback amplifier with identical slew rate (2800 V/µs) to the THS4503CDG4 but with significantly higher bandwidth (850 MHz). This part is classified as a different amplifier architecture and is suitable only for applications where voltage feedback topology is compatible with the original differential amplifier design. The ADA4857-1YRZ-R7 offers extended temperature range (-40°C to 125°C) and reduced supply current (5 mA).

Compliance Status:

All recommended substitute parts maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status, consistent with the original THS4503CDG4 specifications.

Frequently Asked Questions (FAQ)

Q1: Can the THS4503CD directly replace the THS4503CDG4 in existing designs?

A: Yes. The THS4503CD is the active equivalent with identical electrical specifications. The only difference is packaging format (tube versus cut tape/reel). Both parts are 8-SOIC surface mount packages with identical pinout and electrical performance. Tube packaging is suitable for manual assembly or lower-volume production, while cut tape/reel packaging is optimized for automated pick-and-place assembly.

Q2: What are the performance trade-offs when using AD8132ARZ series as a substitute?

A: The AD8132ARZ series reduces slew rate from 2800 V/µs to 1200 V/µs and bandwidth from 370 MHz to 360 MHz. Supply current is reduced from 23 mA to 12 mA. The operating temperature range is extended from 0°C to 70°C to -40°C to 125°C. These trade-offs are acceptable for applications where signal bandwidth and slew rate requirements are within the AD8132ARZ specifications and where extended temperature operation is beneficial.

Q3: Why are AD8138ARZ and ADA4857-1YRZ-R7 listed as substitutes if they have different amplifier types?

A: These parts are listed based on the original THS4503CDG4 manufacturer's substitute recommendations. However, they represent different functional architectures. AD8138ARZ is an ADC driver, and ADA4857-1YRZ-R7 is a voltage feedback amplifier. Substitution with these parts requires verification that the application circuit topology is compatible with the different amplifier architecture. Direct electrical substitution is not guaranteed.

Q4: What is the significance of the packaging variants (ARZ, ARZ-R7, ARZ-RL) for AD8132 and AD8138 parts?

A: The suffix designates packaging format. ARZ indicates tube packaging, ARZ-R7 indicates cut tape with Digi-Reel packaging, and ARZ-RL indicates cut tape with Digi-Reel packaging. All variants maintain identical electrical specifications and 8-SOIC package footprint. Selection depends on assembly process requirements and procurement volume.

Q5: Is the THS4503CDG4 still available for procurement?

A: The THS4503CDG4 is classified as obsolete. However, inventory of 1004 pieces is currently available. For long-term design support and future procurement, transition to the active equivalent THS4503CD or qualified substitute parts is recommended.

Q6: What are the key parameters that determine substitution compatibility?

A: The critical parameters are: amplifier type (differential), number of circuits (1), output type (differential), package type (8-SOIC), mounting type (surface mount), slew rate (2800 V/µs for direct equivalents), bandwidth (370 MHz for direct equivalents), and supply voltage range (4.5 V to 15 V). Deviations in these parameters require application-level verification.

Q7: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status, consistent with the original THS4503CDG4 specifications.