EL2228CSZ Equivalent & Substitute Parts

Part Overview

The EL2228CSZ is a voltage feedback amplifier manufactured by Renesas Electronics Corporation, configured as a dual-circuit operational amplifier in 8-SOIC surface mount packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The EL2228CSZ 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 in compact form factors.

Key Parameters

Parameter	Value
Manufacturer Part Number	EL2228CSZ
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	65 V/µs
Gain Bandwidth Product	40 MHz
-3dB Bandwidth	80 MHz
Current - Input Bias	4.5 µA
Voltage - Input Offset	200 µV
Current - Supply	5 mA (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	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the EL2228CSZ is determined by strict alignment of the following critical parameters:

Package Compatibility: All substitute parts must use 8-SOIC (0.154", 3.90mm Width) surface mount packaging to ensure direct PCB footprint compatibility without layout modifications.

Circuit Configuration: Dual-circuit (2-channel) operational amplifier topology is mandatory for functional equivalence in applications requiring two independent amplification stages.

Supply Voltage Range: Substitute parts must support the minimum 5V and maximum 24V supply span of the EL2228CSZ. Parts with narrower or incompatible voltage ranges are excluded.

Amplifier Architecture: The EL2228CSZ employs voltage feedback topology. Substitute parts utilizing J-FET input architecture (such as the AD8512 series) represent functional alternatives where input bias current, input offset voltage, and bandwidth characteristics remain within acceptable application tolerances.

Electrical Performance Envelope: Key performance metrics including slew rate, gain bandwidth product, input bias current, and output current drive capability must support the intended application requirements.

The AD8512 series (Analog Devices Inc.) represents the primary substitute family, available in multiple packaging configurations (Tube, Tape & Reel, Cut Tape & Digi-Reel®) and performance grades (A and B grades).

Parameter Comparison

Parameter	EL2228CSZ	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	65 V/µs	20 V/µs	20 V/µs	20 V/µs	20 V/µs	20 V/µs	20 V/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	5 mA (x2)	2.2 mA (x2)	2.2 mA (x2)	2.2 mA (x2)	2.2 mA (x2)	2.2 mA (x2)	2.2 mA (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	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Product Status Consideration: The EL2228CSZ is classified as obsolete. All substitute parts from the AD8512 series are active products with ongoing manufacturer support, ensuring long-term availability and supply chain stability.

Compliance and Certification: Both the EL2228CSZ and all AD8512 substitute variants maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications. Moisture sensitivity levels differ, with AD8512 series parts rated MSL 1 (Unlimited) compared to EL2228CSZ MSL 3 (168 Hours), providing superior handling flexibility during manufacturing and storage.

Performance Trade-offs: AD8512 series substitutes exhibit lower slew rate (20V/µs versus 65V/µs) and reduced gain bandwidth product (8 MHz versus 40 MHz). These characteristics are acceptable for applications not requiring high-speed transient response or wide bandwidth operation. Output current per channel is reduced (70 mA versus 180 mA), requiring verification in load-driving applications.

Supply Voltage Compatibility: AD8512 series minimum supply voltage is 10V, compared to 5V for EL2228CSZ. Applications operating at 5V supply require circuit redesign or alternative substitutes. Maximum supply voltage of 30V for AD8512 series exceeds EL2228CSZ maximum of 24V, providing operational margin.

Packaging and Handling: All substitute parts use identical 8-SOIC surface mount packaging, enabling direct PCB footprint compatibility. Improved moisture sensitivity rating (MSL 1) of AD8512 series reduces handling constraints during assembly and storage.

Grade Selection: AD8512ARZ and AD8512ARZ-REEL variants (A-grade) feature input offset voltage of 100µV. AD8512BRZ and AD8512BRZ-REEL variants (B-grade) provide tighter input offset voltage specification of 80µV, suitable for precision applications requiring lower offset drift.

Packaging Format Selection: AD8512ARZ-REEL7 and AD8512BRZ-REEL7 (Cut Tape & Digi-Reel®) offer highest inventory availability (30,300 and 29,655 units respectively), supporting high-volume production requirements. Tube packaging variants (AD8512ARZ, AD8512BRZ) and Tape & Reel variants (AD8512ARZ-REEL, AD8512BRZ-REEL) provide alternative packaging for lower-volume applications.

Frequently Asked Questions (FAQ)

Q: Can AD8512 series parts directly replace EL2228CSZ without circuit modifications?

A: Direct PCB footprint replacement is possible due to identical 8-SOIC packaging. However, circuit performance changes due to lower slew rate (20V/µs vs. 65V/µs), reduced gain bandwidth product (8 MHz vs. 40 MHz), and lower output current per channel (70 mA vs. 180 mA). Applications sensitive to these parameters require circuit redesign or performance verification.

Q: What is the minimum supply voltage requirement for AD8512 substitutes?

A: AD8512 series parts require minimum 10V supply voltage, compared to 5V for EL2228CSZ. Applications operating at 5V supply voltage cannot use AD8512 substitutes without external voltage regulation or alternative component selection.

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

A: Both variants are functionally identical with identical electrical performance except for input offset voltage specification. AD8512ARZ (A-grade) specifies 100µV maximum input offset voltage. AD8512BRZ (B-grade) specifies 80µV maximum input offset voltage, providing tighter tolerance for precision applications. Both grades operate across -40°C to 125°C temperature range.

Q: What packaging formats are available for AD8512 substitutes?

A: AD8512 series is available in three packaging formats: Tube (standard tube packaging for manual handling), Tape & Reel (TR) for automated assembly, and Cut Tape & Digi-Reel® (CT) for flexible quantity requirements. All formats use identical 8-SOIC component package.

Q: How does moisture sensitivity level affect component handling?

A: EL2228CSZ is rated MSL 3 (168 Hours), requiring baking at 125°C for 24 hours if exposed to moisture for more than 168 hours before reflow soldering. AD8512 series is rated MSL 1 (Unlimited), eliminating moisture sensitivity constraints and reducing manufacturing process complexity.

Q: Are there performance differences between different AD8512 packaging formats?

A: No. AD8512ARZ, AD8512ARZ-REEL, and AD8512ARZ-REEL7 are electrically identical, differing only in packaging format and quantity per reel. Identical performance applies to AD8512BRZ variants. Packaging format selection is based on production volume and assembly equipment compatibility.

Q: What is the operating temperature range difference?

A: EL2228CSZ operates -40°C to 85°C. AD8512 series operates -40°C to 125°C, providing extended high-temperature operation capability. This extended range is beneficial for industrial and automotive applications requiring higher temperature margins.

Q: Can AD8512 parts be used in applications requiring 180 mA output current per channel?

A: No. AD8512 series maximum output current per channel is 70 mA, compared to 180 mA for EL2228CSZ. Applications requiring 180 mA output current must use alternative components or external output buffer stages.

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