MAX4451ESA Equivalent & Substitute Parts

Part Overview

The MAX4451ESA is a voltage feedback amplifier integrated circuit manufactured by Analog Devices Inc./Maxim Integrated, featuring dual circuits in an 8-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The MAX4451ESA delivers rail-to-rail output capability with a slew rate of 485V/µs and gain bandwidth product of 175 MHz, suitable for applications requiring dual-channel amplification in compact form factors.

Substiute Parts

MAX4451ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 1704MAX4451ESA Datasheet

Current PartRFQ

MAX4451ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2329MAX4451ESA+ Datasheet

DirectRFQ

THS4222D

Texas InstrumentsIn Stock: 1258THS4222D Datasheet

MFR RecommendedRFQ

THS4222DR

Texas InstrumentsIn Stock: 8083THS4222DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX4451ESA is determined by strict adherence to the following criteria:

Primary Substitution Criteria:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 2
• Output Type: Rail-to-Rail
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C to 85°C

Secondary Compatibility Parameters:

• Slew Rate: Minimum 485V/µs
• Gain Bandwidth Product: Minimum 175 MHz
• -3dB Bandwidth: Minimum 210 MHz
• Current - Input Bias: Maximum 6.5 µA
• Voltage - Input Offset: Maximum 4 mV
• Current - Supply: Maximum 6.5mA (x2 Channels)
• Current - Output / Channel: Minimum 70 mA
• Voltage - Supply Span: 4.5V to 11V

Substitute parts must maintain identical package geometry and pinout compatibility while meeting or exceeding the specified electrical performance parameters. The MAX4451ESA+ serves as a direct equivalent with identical electrical specifications. The THS4222D and THS4222DR from Texas Instruments represent alternative manufacturers' solutions with enhanced performance characteristics in specific parameters.

Parameter Comparison

Engineering Selection Recommendations

MAX4451ESA+ (Direct Equivalent): The MAX4451ESA+ is the direct functional equivalent of the MAX4451ESA, maintaining identical electrical specifications across all measured parameters. The primary distinction is product status: MAX4451ESA+ is active and carries ROHS3 compliance certification, whereas the original MAX4451ESA is obsolete and RoHS non-compliant. For new designs or production continuity, MAX4451ESA+ is the preferred selection when Analog Devices/Maxim Integrated components are specified. Packaging is supplied in tube format.

THS4222D and THS4222DR (Alternative Manufacturers): The THS4222D and THS4222DR from Texas Instruments provide alternative sourcing from a different manufacturer while maintaining identical package geometry and pinout compatibility. Both devices are active products with ROHS3 compliance. Performance characteristics differ in specific parameters: slew rate is doubled (990V/µs versus 485V/µs), input bias current is significantly reduced (900 nA versus 6.5 µA), and output current capability is increased (100 mA versus 70 mA per channel). Supply voltage range is expanded (2.7V to 15V versus 4.5V to 11V). These characteristics make THS4222D and THS4222DR suitable for applications requiring lower input bias current, higher slew rate, or extended supply voltage operation. THS4222DR offers higher inventory availability (8017 Pcs) compared to THS4222D (1226 Pcs).

Compliance and Regulatory Status: All substitute parts carry ROHS3 compliance and REACH Unaffected status. Moisture sensitivity level is uniform across all options (MSL 1 - Unlimited). ECCN and HTSUS classifications are identical.

Frequently Asked Questions (FAQ)

Q: Can MAX4451ESA+ be used as a direct replacement for MAX4451ESA?

A: Yes. MAX4451ESA+ is electrically and functionally identical to MAX4451ESA with identical pin configuration and package dimensions (8-SOIC). The primary difference is product status: MAX4451ESA+ is active and ROHS3 compliant, while MAX4451ESA is obsolete. Substitution requires no circuit modifications.

Q: What are the key differences between MAX4451ESA and THS4222D/THS4222DR?

A: Both maintain identical package geometry and pinout. Key electrical differences include: THS4222D/THS4222DR feature doubled slew rate (990V/µs), significantly lower input bias current (900 nA), higher output current per channel (100 mA), and expanded supply voltage range (2.7V to 15V). Gain bandwidth product is lower (120 MHz versus 175 MHz). These differences may affect circuit performance depending on application requirements.

Q: Are THS4222D and THS4222DR interchangeable?

A: THS4222D and THS4222DR are electrically identical. The designation difference reflects packaging format. Both are surface mount 8-SOIC devices with identical electrical specifications and performance characteristics. Selection between them depends on procurement and inventory requirements.

Q: What is the impact of lower input bias current in THS4222 devices?

A: The THS4222D and THS4222DR exhibit input bias current of 900 nA compared to 6.5 µA in MAX4451ESA. This reduction minimizes input current-induced offset errors and is beneficial in high-impedance input circuits. Applications with low-impedance sources experience minimal practical difference.

Q: Can these parts be used in existing MAX4451ESA circuit designs without modification?

A: MAX4451ESA+ requires no modifications due to identical specifications. THS4222D and THS4222DR maintain identical pinout and package, enabling direct physical substitution. However, circuit performance may differ due to variations in slew rate, input bias current, and supply voltage range. Circuit validation is necessary to confirm performance compatibility with application requirements.

Q: What is the significance of ROHS3 compliance for substitute parts?

A: ROHS3 compliance indicates conformance to Restriction of Hazardous Substances Directive 3, restricting specified hazardous materials in electrical and electronic equipment. MAX4451ESA+ and THS4222 devices meet this regulatory requirement, whereas the original MAX4451ESA does not. For applications subject to regulatory compliance requirements, ROHS3-compliant substitutes are necessary.

Q: How does the expanded supply voltage range of THS4222 devices affect circuit design?

A: THS4222D and THS4222DR operate from 2.7V to 15V, compared to MAX4451ESA's 4.5V to 11V range. This expanded range enables operation in applications with lower supply voltages or higher supply voltage rails. Existing circuits designed for MAX4451ESA within the 4.5V to 11V window remain compatible with THS4222 devices.