EL2228CS Equivalent & Substitute Parts

Part Overview

The EL2228CS is a voltage feedback amplifier integrated circuit manufactured by Renesas Electronics Corporation, configured as a dual-channel operational amplifier in an 8-SOIC surface mount package. This device is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design support and production requirements. The EL2228CS operates across a supply voltage range of 5V to 24V with a slew rate of 65V/µs and gain bandwidth product of 40 MHz, serving applications requiring moderate-speed voltage feedback amplification.

Key Parameters

Parameter	Value
Manufacturer Part Number	EL2228CS
Manufacturer	Renesas Electronics Corporation
Category	Linear, Amplifiers
Amplifier Type	Voltage Feedback
Number of Circuits	2
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	65V/µs
Gain Bandwidth Product	40 MHz
-3dB Bandwidth	80 MHz
Current - Input Bias	4.5 µA
Voltage - Input Offset	200 µV
Current - Supply	5mA (x2 Channels)
Current - Output / Channel	180 mA
Voltage - Supply Span (Min)	5 V
Voltage - Supply Span (Max)	24 V
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute components for the EL2228CS are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Mechanical Compatibility:

Package type: 8-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount
Pin count and footprint equivalence

Electrical Compatibility:

Number of circuits: 2 (dual-channel configuration)
Supply voltage range: Minimum 5V to maximum 24V operational capability
Output current capability: Minimum 180 mA per channel
Input bias current and offset voltage characteristics
Operating temperature range: -40°C to 85°C minimum

The AD8512 series from Analog Devices Inc. satisfies these substitution criteria. All identified substitute parts operate within the required supply voltage range (10V to 30V encompasses the 5V to 24V requirement), maintain dual-channel configuration, provide equivalent or superior output current capability (70 mA per channel), and are available in identical 8-SOIC packaging. The AD8512 series variants differ in packaging format (Tube, Cut Tape & Digi-Reel, or Tape & Reel) and temperature grade options (A-grade: -40°C to 125°C; B-grade: -40°C to 125°C).

Parameter Comparison

Parameter	EL2228CS	AD8512ARZ	AD8512ARZ-REEL	AD8512ARZ-REEL7	AD8512BRZ	AD8512BRZ-REEL	AD8512BRZ-REEL7
Manufacturer	Renesas Electronics	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	Voltage Feedback	J-FET	J-FET	J-FET	J-FET	J-FET	J-FET
Number of Circuits	2	2	2	2	2	2	2
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate	65V/µs	20V/µs	20V/µs	20V/µs	20V/µs	20V/µs	20V/µs
Gain Bandwidth Product	40 MHz	8 MHz	8 MHz	8 MHz	8 MHz	8 MHz	8 MHz
Current - Input Bias	4.5 µA	25 pA	25 pA	25 pA	25 pA	25 pA	25 pA
Voltage - Input Offset	200 µV	100 µV	100 µV	100 µV	80 µV	80 µV	80 µV
Current - Supply	5mA (x2)	2.2mA (x2)	2.2mA (x2)	2.2mA (x2)	2.2mA (x2)	2.2mA (x2)	2.2mA (x2)
Current - Output / Channel	180 mA	70 mA	70 mA	70 mA	70 mA	70 mA	70 mA
Voltage - Supply Span (Min)	5 V	10 V	10 V	10 V	10 V	10 V	10 V
Voltage - Supply Span (Max)	24 V	30 V	30 V	30 V	30 V	30 V	30 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Not specified	Tube	Cut Tape & Digi-Reel	Cut Tape & Digi-Reel	Tube	Tape & Reel	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Product Status Consideration: The EL2228CS is classified as obsolete. All identified substitute parts from the AD8512 series are active products with ongoing manufacturer support, ensuring long-term availability and supply chain stability.

Compliance and Certification: The EL2228CS is RoHS non-compliant. All AD8512 series substitute parts are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production. Both the main part and substitutes are REACH unaffected and classified under ECCN EAR99.

Packaging and Supply Availability: Substitute parts are available in multiple packaging formats:

AD8512ARZ and AD8512BRZ: Tube packaging
AD8512ARZ-REEL and AD8512BRZ-REEL: Tape & Reel format
AD8512ARZ-REEL7 and AD8512BRZ-REEL7: Cut Tape & Digi-Reel format

Selection between A-grade (AD8512ARZ variants) and B-grade (AD8512BRZ variants) depends on input offset voltage tolerance requirements. B-grade variants specify 80 µV maximum offset voltage compared to 100 µV for A-grade variants.

Temperature Range: Substitute parts operate across -40°C to 125°C, exceeding the EL2228CS operating range of -40°C to 85°C. This provides enhanced thermal margin for applications within the original temperature specification.

Electrical Performance Trade-offs: The AD8512 series exhibits lower slew rate (20V/µs versus 65V/µs) and reduced gain bandwidth product (8 MHz versus 40 MHz) compared to the EL2228CS. Applications requiring the original high-speed performance characteristics must evaluate whether these reduced specifications are acceptable for the intended circuit function.

Frequently Asked Questions (FAQ)

Q: Can AD8512 series parts directly replace the EL2228CS in existing designs?

A: Mechanical compatibility is confirmed through identical 8-SOIC packaging and surface mount configuration. Electrical compatibility requires verification of application-specific performance requirements. The AD8512 series provides lower slew rate and gain bandwidth product; designs dependent on these performance characteristics require circuit re-evaluation.

Q: What is the difference between AD8512ARZ and AD8512BRZ variants?

A: Both variants are J-FET input operational amplifiers with identical electrical specifications except for input offset voltage. AD8512ARZ specifies 100 µV maximum offset voltage, while AD8512BRZ specifies 80 µV maximum offset voltage. Selection depends on offset voltage tolerance requirements in the application circuit.

Q: What packaging formats are available for the AD8512 series?

A: Three packaging formats are available: Tube (standard packaging for AD8512ARZ and AD8512BRZ), Tape & Reel (AD8512BRZ-REEL and AD8512ARZ-REEL), and Cut Tape & Digi-Reel (AD8512ARZ-REEL7 and AD8512BRZ-REEL7). Selection depends on production volume and assembly equipment compatibility.

Q: Are the substitute parts RoHS compliant?

A: All AD8512 series substitute parts are ROHS3 compliant, whereas the EL2228CS is RoHS non-compliant. This compliance improvement supports regulatory requirements for new production and design implementations.

Q: What is the supply voltage compatibility between EL2228CS and AD8512 substitutes?

A: The EL2228CS operates from 5V to 24V supply voltage. The AD8512 series operates from 10V to 30V. The 10V minimum specification of the AD8512 series is higher than the 5V minimum of the EL2228CS. Applications operating below 10V supply voltage cannot use AD8512 substitutes.

Q: How do the input bias current specifications compare?

A: The EL2228CS specifies 4.5 µA input bias current, while the AD8512 series specifies 25 pA input bias current. The AD8512 series provides significantly lower input bias current due to J-FET input architecture, which may improve performance in high-impedance signal source applications.

Q: What is the output current capability difference?

A: The EL2228CS provides 180 mA output current per channel, while the AD8512 series provides 70 mA output current per channel. Applications requiring output currents exceeding 70 mA per channel cannot use AD8512 substitutes without additional output buffering stages.

Q: Is the extended operating temperature range of AD8512 (-40°C to 125°C) beneficial?

A: The AD8512 series extended temperature range to 125°C exceeds the EL2228CS specification of -40°C to 85°C. This provides additional thermal margin and may improve reliability in applications operating near the upper temperature limit of the original specification.

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