CS3004-FS Equivalent & Substitute Parts Reference

Part Overview

The CS3004-FS is a general-purpose operational amplifier manufactured by Cirrus Logic Inc., featuring dual circuits in an 8-SOIC surface-mount package. This device is classified as Obsolete and is no longer in active production. The CS3004-FS provides rail-to-rail output capability with a supply voltage range of 2.7V to 5V, making it suitable for low-voltage analog signal processing applications.

Due to its obsolete status, component sourcing for new designs or production runs requires identification of functionally equivalent alternatives. Substitute parts must maintain compatibility across package type, pin configuration, electrical performance parameters, and operating conditions to ensure direct replacement capability without circuit redesign.

Key Parameters

Parameter	CS3004-FS Value	Unit	Substitution Relevance
Amplifier Type	General Purpose	—	Critical
Number of Circuits	2	Circuits	Critical
Output Type	Rail-to-Rail	—	Critical
Package / Case	8-SOIC (0.154", 3.90mm Width)	—	Critical
Mounting Type	Surface Mount	—	Critical
Voltage - Supply Span (Min)	2.7	V	Critical
Voltage - Supply Span (Max)	5	V	Critical
Operating Temperature	-40°C ~ 125°C	—	Important
Slew Rate	0.25	V/µs	Important
Current - Input Bias	170	pA	Important
Voltage - Input Offset	2	µV	Important
Current - Supply	2	mA	Important

Substitute Part Grouping Explanation

Substitute parts for the CS3004-FS are selected based on strict compatibility criteria. All substitute candidates must satisfy the following mandatory requirements:

Critical Compatibility Parameters:

Package type: 8-SOIC surface-mount configuration with 0.154" (3.90mm) width
Circuit count: Dual-channel (2 circuits) operational amplifier
Output configuration: Rail-to-rail output capability
Supply voltage range: Minimum 2.7V to maximum 5V (CS3004-FS operating window must be fully contained within substitute supply range)
Mounting technology: Surface mount

Performance Parameters for Evaluation:

Slew rate, input bias current, input offset voltage, and supply current are secondary selection criteria used to assess performance trade-offs
Operating temperature range must support the -40°C to 125°C specification of the original part

The substitute parts identified fall into two functional categories: Zero-Drift Amplifiers (AD8629 series) and CMOS Amplifiers (OPA2314, OPA2316 series). All candidates meet the critical package and electrical compatibility requirements while offering enhanced performance characteristics compared to the obsolete CS3004-FS.

Parameter Comparison

Parameter	CS3004-FS	AD8629TRZ-EP	AD8629WARZ-RL	OPA2314AQDRQ1	OPA2316ID	OPA2316IDR	Unit
Manufacturer	Cirrus Logic	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments	Texas Instruments	—
Amplifier Type	General Purpose	Zero-Drift	Zero-Drift	CMOS	CMOS	CMOS	—
Number of Circuits	2	2	2	2	2	2	Circuits
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	—
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	—
Voltage - Supply Span (Min)	2.7	2.7	2.7	1.8	1.8	1.8	V
Voltage - Supply Span (Max)	5	5	5	5.5	5.5	5.5	V
Operating Temperature	-40 to 125	-55 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	°C
Slew Rate	0.25	1	1	1.5	6	6	V/µs
Gain Bandwidth Product	—	2.5	2.5	3	10	10	MHz
Current - Input Bias	170	30	30	2	5	5	pA
Voltage - Input Offset	2	1	1	500	500	500	µV
Current - Supply	2	0.85	—	0.15	0.4	0.4	mA
Product Status	Obsolete	Active	Active	Active	Active	Active	—
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The AD8629WARZ-RL and AD8629TRZ-EP (Analog Devices zero-drift amplifiers) provide the closest functional match to the CS3004-FS. Both devices maintain identical package configuration, dual-circuit topology, rail-to-rail output, and supply voltage compatibility. The AD8629 series offers superior input offset voltage performance (1 µV vs. 2 µV) and significantly lower input bias current (30 pA vs. 170 pA). Both parts are in active production status with ROHS3 compliance.

The AD8629WARZ-RL is available in Tape & Reel packaging with 32,545 units in stock, providing optimal supply chain availability. The AD8629TRZ-EP is supplied in Tube packaging with 768 units available and supports extended operating temperature range (-55°C to 125°C).

Secondary Substitutes (Performance Enhancement):

The OPA2316ID and OPA2316IDR (Texas Instruments CMOS amplifiers) offer enhanced performance specifications including 6V/µs slew rate and 10 MHz gain bandwidth product, compared to the CS3004-FS baseline of 0.25V/µs and unspecified bandwidth. Both maintain 8-SOIC package compatibility and supply voltage range coverage. The OPA2316IDR variant provides 20,695 units in stock with Cut Tape & Digi-Reel packaging. Both parts are ROHS3 compliant and in active production.

Automotive-Grade Alternative:

The OPA2314AQDRQ1 (Texas Instruments automotive-qualified CMOS amplifier) is suitable for applications requiring AEC-Q100 qualification. This part extends the minimum supply voltage to 1.8V and maximum to 5.5V, providing broader supply range coverage. With 35,200 units in stock, it offers excellent availability. The automotive qualification grade distinguishes this part for safety-critical or automotive applications.

Selection Criteria Summary:

For direct replacement with minimal circuit validation: AD8629WARZ-RL or AD8629TRZ-EP
For enhanced performance and higher bandwidth applications: OPA2316ID or OPA2316IDR
For automotive applications requiring AEC-Q100 qualification: OPA2314AQDRQ1

All substitute parts are in active production status, ensuring long-term supply chain stability compared to the obsolete CS3004-FS.

Frequently Asked Questions (FAQ)

Q1: Can the AD8629 series directly replace the CS3004-FS without circuit modifications?

A: Yes. The AD8629WARZ-RL and AD8629TRZ-EP maintain identical 8-SOIC package pinout, dual-circuit configuration, rail-to-rail output capability, and supply voltage range (2.7V to 5V). Pin-for-pin compatibility is confirmed. However, the improved input offset voltage (1 µV vs. 2 µV) and lower input bias current (30 pA vs. 170 pA) may require verification in precision analog circuits where these parameters directly affect system performance.

Q2: What is the difference between AD8629TRZ-EP and AD8629WARZ-RL?

A: Both are zero-drift amplifiers from Analog Devices with identical electrical specifications. The primary differences are packaging format and operating temperature range. The AD8629TRZ-EP is supplied in Tube packaging and supports -55°C to 125°C operation. The AD8629WARZ-RL is supplied in Tape & Reel format and operates from -40°C to 125°C. The AD8629WARZ-RL offers significantly higher inventory availability (32,545 units vs. 768 units).

Q3: Why do the OPA2316 parts show higher slew rate and bandwidth than the CS3004-FS?

A: The OPA2316 series employs CMOS amplifier architecture optimized for higher-speed signal processing, delivering 6V/µs slew rate and 10 MHz gain bandwidth product. The CS3004-FS general-purpose design prioritizes low-power operation with 0.25V/µs slew rate. For applications requiring faster signal response or higher frequency content, the OPA2316 series provides enhanced performance. For low-speed, low-power applications, the AD8629 zero-drift series maintains closer performance alignment with the original CS3004-FS.

Q4: Is the OPA2314AQDRQ1 suitable for non-automotive applications?

A: Yes. The OPA2314AQDRQ1 is AEC-Q100 qualified for automotive use but functions as a standard CMOS dual-channel amplifier in any application. Its automotive qualification does not restrict use in industrial, consumer, or other non-automotive designs. The extended supply voltage range (1.8V to 5.5V) and low input bias current (2 pA) make it suitable for precision low-power applications beyond automotive requirements.

Q5: What packaging options are available for substitute parts?

A: All substitute parts are supplied in 8-SOIC surface-mount packages matching the CS3004-FS. Packaging format variations include Tube (AD8629TRZ-EP), Tape & Reel (AD8629WARZ-RL), and Cut Tape & Digi-Reel (OPA2316IDR). The OPA2316ID is supplied in Tube format. Selection of packaging format depends on production volume and assembly process requirements. All formats are compatible with standard surface-mount assembly equipment.

Q6: Are all substitute parts RoHS compliant?

A: The AD8629 series (both variants) and OPA2316 series are ROHS3 compliant. The OPA2314AQDRQ1 RoHS status is not specified in the provided data. For applications requiring confirmed RoHS compliance, the AD8629 and OPA2316 families provide documented compliance certification.

Q7: Which substitute part offers the best supply chain availability?

A: The AD8629WARZ-RL provides the highest inventory level with 32,545 units in stock. The OPA2314AQDRQ1 follows with 35,200 units. The OPA2316IDR offers 20,695 units. The AD8629TRZ-EP has limited availability at 768 units. For applications requiring immediate component sourcing, the AD8629WARZ-RL and OPA2314AQDRQ1 are recommended.

Q8: Can I use the OPA2316 series in applications where the CS3004-FS was originally specified?

A: Yes, with performance verification. The OPA2316 series maintains package and supply voltage compatibility. However, the significantly higher slew rate (6V/µs vs. 0.25V/µs) and bandwidth (10 MHz vs. unspecified) may introduce different circuit behavior in sensitive analog applications. Input offset voltage is higher (500 µV vs. 2 µV), which affects precision measurement circuits. Circuit simulation or bench testing is recommended for applications where these performance differences are critical.

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