MAX4304ESA Equivalent & Substitute Parts Reference

Part Overview

The MAX4304ESA is a voltage feedback amplifier integrated circuit manufactured by Analog Devices Inc./Maxim Integrated, housed 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 requirements. The MAX4304ESA delivers a slew rate of 1000V/µs with a -3dB bandwidth of 740 MHz, suitable for high-speed signal conditioning applications. Due to its obsolete status, active alternatives with compatible electrical and mechanical characteristics are required for new designs and production continuity.

Substiute Parts

MAX4304ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 3750MAX4304ESA Datasheet

Current PartRFQ

MAX4304ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3978MAX4304ESA+ Datasheet

DirectRFQ

THS4221D

Texas InstrumentsIn Stock: 1293THS4221D Datasheet

MFR RecommendedRFQ

THS4271D

Texas InstrumentsIn Stock: 1650THS4271D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX4304ESA is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 1
• 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: 1000V/µs (exact match required)
• -3dB Bandwidth: 740 MHz (minimum threshold)
• Current - Input Bias: 32 µA (maximum allowable)
• Voltage - Input Offset: 1 mV (maximum allowable)
• Current - Supply: 20 mA (maximum allowable)
• Current - Output / Channel: 70 mA (minimum threshold)
• Voltage - Supply Span: 7V to 11V (operating range)

The MAX4304ESA+ serves as a direct equivalent with identical electrical specifications and active product status. The THS4221D and THS4271D from Texas Instruments are manufacturer-recommended alternatives that meet or exceed the primary substitution criteria while offering enhanced performance characteristics and active availability.

Parameter Comparison

Engineering Selection Recommendations

MAX4304ESA+ (Direct Equivalent): The MAX4304ESA+ is the direct functional equivalent of the MAX4304ESA, offering identical electrical specifications and the same 8-SOIC package footprint. The primary distinction is product status: MAX4304ESA+ maintains active availability with ROHS3 compliance, whereas the original MAX4304ESA is obsolete and RoHS non-compliant. For designs requiring exact electrical performance matching, MAX4304ESA+ is the preferred selection. Current inventory of 3964 units supports production requirements.

THS4221D (Texas Instruments Alternative): The THS4221D is a manufacturer-recommended substitute with compatible package and mounting specifications. This device features rail-to-rail output capability and operates across an expanded supply voltage range (2.7V to 15V) compared to the MAX4304ESA (7V to 11V). The THS4221D exhibits lower input bias current (0.9 nA versus 32 µA) and reduced supply current (14 mA versus 20 mA), resulting in lower power consumption. The -3dB bandwidth of 230 MHz is lower than the MAX4304ESA's 740 MHz, making this substitute suitable for applications where bandwidth requirements do not exceed 230 MHz. ROHS3 compliance and active product status support long-term availability. Current inventory of 1211 units is available.

THS4271D (Texas Instruments Alternative): The THS4271D is a manufacturer-recommended substitute offering enhanced performance characteristics. This device maintains the 1000V/µs slew rate of the MAX4304ESA while providing significantly higher -3dB bandwidth (1400 MHz versus 740 MHz) and increased output current capability (160 mA versus 70 mA). The THS4271D operates across a supply voltage range of 5V to 15V, which encompasses the MAX4304ESA operating range. Input bias current is reduced to 6 µA, and supply current is 22 mA. ROHS3 compliance and active product status ensure regulatory compliance and long-term availability. Current inventory of 1544 units supports production needs. Selection of THS4271D is appropriate for applications requiring higher bandwidth performance or increased output drive capability.

Frequently Asked Questions (FAQ)

Q: Can MAX4304ESA+ be used as a direct replacement for MAX4304ESA?

A: Yes. The MAX4304ESA+ is electrically and mechanically identical to the MAX4304ESA. Both devices share identical slew rate (1000V/µs), -3dB bandwidth (740 MHz), input bias current (32 µA), input offset voltage (1 mV), supply current (20 mA), output current (70 mA), and supply voltage range (7V to 11V). The 8-SOIC package footprint is identical. The primary difference is product status and RoHS compliance: MAX4304ESA+ is active and ROHS3 compliant, while MAX4304ESA is obsolete and RoHS non-compliant. No circuit modifications are required for substitution.

Q: What are the key differences between THS4221D and THS4271D?

A: Both devices are Texas Instruments voltage feedback amplifiers in 8-SOIC packages with identical operating temperature range (-40°C to 85°C). The primary differences are: THS4221D provides -3dB bandwidth of 230 MHz with 100 mA output current and operates from 2.7V to 15V supply. THS4271D provides -3dB bandwidth of 1400 MHz with 160 mA output current and operates from 5V to 15V supply. Both maintain the 1000V/µs slew rate. Selection depends on bandwidth and output current requirements of the specific application.

Q: Is the 8-SOIC package footprint identical across all four parts?

A: Yes. All four parts—MAX4304ESA, MAX4304ESA+, THS4221D, and THS4271D—use the 8-SOIC package with 0.154" width and 3.90mm width specification. PCB footprints are mechanically compatible without modification.

Q: What is the impact of supply voltage range differences on substitution?

A: The MAX4304ESA operates from 7V to 11V. The MAX4304ESA+ maintains this range. The THS4221D operates from 2.7V to 15V, providing broader flexibility. The THS4271D operates from 5V to 15V. If the application circuit operates within the 7V to 11V range, all four parts are compatible. If the application requires operation below 7V, only THS4221D is suitable. If the application requires operation above 11V, both THS4221D and THS4271D are suitable.

Q: How do input bias current differences affect circuit design?

A: The MAX4304ESA specifies 32 µA input bias current. The MAX4304ESA+ maintains this specification. The THS4221D reduces input bias current to 0.9 nA, and THS4271D reduces it to 6 µA. Lower input bias current reduces input impedance loading effects and is beneficial in high-impedance signal conditioning circuits. If the existing design accounts for 32 µA bias current, substitution with lower bias current devices will improve performance without requiring circuit modification.

Q: Are all substitute parts RoHS compliant?

A: The MAX4304ESA is RoHS non-compliant. The MAX4304ESA+, THS4221D, and THS4271D are all ROHS3 compliant. For applications subject to RoHS regulatory requirements, MAX4304ESA+ or either Texas Instruments alternative must be selected.

Q: What inventory considerations apply to these parts?

A: Current inventory levels are: MAX4304ESA (3700 units), MAX4304ESA+ (3964 units), THS4221D (1211 units), and THS4271D (1544 units). All parts are available as new original stock. For high-volume production, MAX4304ESA+ offers the highest inventory level with identical electrical specifications.